[
  {
    "sku": "RSTO5-TV",
    "brand": "FAG",
    "manufacturer_designation": "RSTO5-TV",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 7,
    "D_mm": 16,
    "B_mm": 7.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "polymer_PA66",
    "dynamic_load_kN": 2.55,
    "static_load_kN": 2.65,
    "fatigue_load_limit_kN": 0.335,
    "limiting_speed_rpm": 16000,
    "max_rpm": 16000,
    "weight_g": 8.5,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 7×16×7.8 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 7 mm bore — and the 7.8 mm width sets the contact width on the mating track the catalogue lists C 2.55 kN and C0 2.65 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.96 reflects a rolling-element pack sized for heavy static track loading, and the 4.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.335 kN at 7 mm bore, equivalent to 0.36 kN of dynamic rating per millimetre — the limiting speed is 16,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 7 mm bore takes the mounting pin or shaft; across the 7.8 mm contact width the dynamic rating works out to 0.33 kN per millimetre of rolling-element complement mass is 8.5 g, or 0.07 g per mm² of the 16×7.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 7 mm pin bore and only 8.5 g: the smallest sizes demand accurate shaft geometry, because the 4.5 mm section leaves no tolerance for a soft or tapered seat At 8.5 g the roller adds little inertia to follower linkages, but the unflanged design walks off a skewed track — track parallelism substitutes for the missing guidance Reading RSTO: yoke roller, no inner ring, no flanges; lateral guidance and contamination protection must come from the machine structure around the 7.8 mm-wide roller With the -TV polyamide cage the rollers are positively separated, so the 7 mm bearing suits continuous rotation rather than the slow oscillating duty where cageless packs are chosen. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 16 mm track diameter and 2.55 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 7 mm seat, and in printing press sheet-transfer grippers the 8.5 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 7.8 mm width and the published 2.65 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO5-TV?",
        "a": "The RSTO5-TV is a RSTO yoke-type track roller without inner ring, without axial guidance with 16 mm outside diameter, 7 mm bore and 7.8 mm width, envelope 7×16×7.8 mm. Mass is 8.5 g."
      },
      {
        "q": "What does the RSTO5-TV designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO5-TV identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 7×16×7.8 mm and the catalogue ratings are C 2.55 kN, C0 2.65 kN, Cur 0.335 kN."
      },
      {
        "q": "What is the load capacity of the RSTO5-TV?",
        "a": "The basic dynamic load rating C is 2.55 kN and the basic static load rating C0 is 2.65 kN; the fatigue load limit Cur is 0.335 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO5-TV?",
        "a": "HR1 lists a limiting speed of 16,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO5-TV?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 16 mm outer surface tolerates only small angular error. The 7 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO5",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO5-TV",
      "RSTO5-TV"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO6-TV",
    "brand": "FAG",
    "manufacturer_designation": "RSTO6-TV",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 19,
    "B_mm": 9.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "polymer_PA66",
    "dynamic_load_kN": 3.75,
    "static_load_kN": 4.6,
    "fatigue_load_limit_kN": 0.66,
    "limiting_speed_rpm": 10000,
    "max_rpm": 10000,
    "weight_g": 12.5,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×19×9.8 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 9.8 mm width sets the contact width on the mating track the catalogue lists C 3.75 kN and C0 4.6 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.82 reflects a rolling-element pack sized for heavy static track loading, and the 4.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.66 kN at 10 mm bore, equivalent to 0.38 kN of dynamic rating per millimetre — the limiting speed is 10,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 9.8 mm contact width the dynamic rating works out to 0.38 kN per millimetre of rolling-element complement mass is 12.5 g, or 0.07 g per mm² of the 19×9.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 10 mm pin bore and only 12.5 g: the smallest sizes demand accurate shaft geometry, because the 4.5 mm section leaves no tolerance for a soft or tapered seat With C 3.75 kN and C0 4.6 kN the roller accepts track loads directly; the 10,000 r/min limiting speed is the only speed figure HR1 publishes for track rollers The thick-walled outer ring is the running element — 19 mm outside diameter over a 10 mm pin seat — and is made to roll flat on a mating track rather than inside a housing Reading -TV: an injection-moulded polyamide cage guides the rolling elements — the lightweight choice that keeps the mass at 12.5 g in the 19 mm envelope. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 19 mm track diameter and 3.75 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 10 mm seat, and in packaging machine timing mechanisms the 12.5 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 9.8 mm width and the published 4.6 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 19 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO6-TV?",
        "a": "The RSTO6-TV is a RSTO yoke-type track roller without inner ring, without axial guidance with 19 mm outside diameter, 10 mm bore and 9.8 mm width, envelope 10×19×9.8 mm. Mass is 12.5 g."
      },
      {
        "q": "What does the RSTO6-TV designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO6-TV identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×19×9.8 mm and the catalogue ratings are C 3.75 kN, C0 4.6 kN, Cur 0.66 kN."
      },
      {
        "q": "What is the load capacity of the RSTO6-TV?",
        "a": "The basic dynamic load rating C is 3.75 kN and the basic static load rating C0 is 4.6 kN; the fatigue load limit Cur is 0.66 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO6-TV?",
        "a": "HR1 lists a limiting speed of 10,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO6-TV?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The 10 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO6",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO6-TV",
      "RSTO6-TV"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO8-TV",
    "brand": "FAG",
    "manufacturer_designation": "RSTO8-TV",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 24,
    "B_mm": 9.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "polymer_PA66",
    "dynamic_load_kN": 4.2,
    "static_load_kN": 5.6,
    "fatigue_load_limit_kN": 0.8,
    "limiting_speed_rpm": 8000,
    "max_rpm": 8000,
    "weight_g": 21,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×24×9.8 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 9.8 mm width sets the contact width on the mating track the catalogue lists C 4.2 kN and C0 5.6 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.75 reflects a rolling-element pack sized for heavy static track loading, and the 6.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.8 kN at 12 mm bore, equivalent to 0.35 kN of dynamic rating per millimetre — the limiting speed is 8,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 9.8 mm contact width the dynamic rating works out to 0.43 kN per millimetre of rolling-element complement mass is 21 g, or 0.09 g per mm² of the 24×9.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 12 mm pin bore and only 21 g: the smallest sizes demand accurate shaft geometry, because the 6.0 mm section leaves no tolerance for a soft or tapered seat The pin surface at 12 mm must be hardened to 58–64 HRC like a shaft raceway; a soft pin flats quickly under the 5.6 kN static load RSTO rollers separate into their components, so the outer ring and needle-cage assembly can be placed in a yoke eye and retained by the pin during build -TV denotes the PA66 cage: light, quiet and self-lubricating in dry-running moments, but limited by the polymer's continuous-temperature ceiling well below the ring steel's. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 24 mm track diameter and 4.2 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 12 mm seat, and in woodworking machine feed tracks the 21 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 9.8 mm width and the published 5.6 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 24 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO8-TV?",
        "a": "The RSTO8-TV is a RSTO yoke-type track roller without inner ring, without axial guidance with 24 mm outside diameter, 12 mm bore and 9.8 mm width, envelope 12×24×9.8 mm. Mass is 21 g."
      },
      {
        "q": "What does the RSTO8-TV designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO8-TV identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×24×9.8 mm and the catalogue ratings are C 4.2 kN, C0 5.6 kN, Cur 0.8 kN."
      },
      {
        "q": "What is the load capacity of the RSTO8-TV?",
        "a": "The basic dynamic load rating C is 4.2 kN and the basic static load rating C0 is 5.6 kN; the fatigue load limit Cur is 0.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO8-TV?",
        "a": "HR1 lists a limiting speed of 8,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO8-TV?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The 12 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO8",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO8-TV",
      "RSTO8-TV"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO10",
    "brand": "FAG",
    "manufacturer_designation": "RSTO10",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 14,
    "D_mm": 30,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 8.4,
    "static_load_kN": 9.5,
    "fatigue_load_limit_kN": 1.39,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 42,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 14×30×11.8 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 14 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 8.4 kN and C0 9.5 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.88 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.39 kN at 14 mm bore, equivalent to 0.60 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 14 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.71 kN per millimetre of rolling-element complement mass is 42 g, or 0.12 g per mm² of the 30×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 14 mm pin bore this size balances the 30 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range RSTO is the basic yoke-type track roller without inner ring and without axial guidance: the needle rollers run directly on a hardened, ground mounting pin Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 30 mm track diameter and 8.4 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 14 mm seat, and in packaging machine timing mechanisms the 42 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 11.8 mm width and the published 9.5 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO10?",
        "a": "The RSTO10 is a RSTO yoke-type track roller without inner ring, without axial guidance with 30 mm outside diameter, 14 mm bore and 11.8 mm width, envelope 14×30×11.8 mm. Mass is 42 g."
      },
      {
        "q": "What does the RSTO10 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO10 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 14×30×11.8 mm and the catalogue ratings are C 8.4 kN, C0 9.5 kN, Cur 1.39 kN."
      },
      {
        "q": "What is the load capacity of the RSTO10?",
        "a": "The basic dynamic load rating C is 8.4 kN and the basic static load rating C0 is 9.5 kN; the fatigue load limit Cur is 1.39 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO10?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO10?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The 14 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO10",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO10",
      "RSTO10"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO12",
    "brand": "FAG",
    "manufacturer_designation": "RSTO12",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 16,
    "D_mm": 32,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9,
    "static_load_kN": 10.4,
    "fatigue_load_limit_kN": 1.56,
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500,
    "weight_g": 49,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 16×32×11.8 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 16 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 9 kN and C0 10.4 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.87 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.56 kN at 16 mm bore, equivalent to 0.56 kN of dynamic rating per millimetre — the limiting speed is 4,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 16 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.76 kN per millimetre of rolling-element complement mass is 49 g, or 0.13 g per mm² of the 32×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 16 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty With C 9 kN and C0 10.4 kN the roller accepts track loads directly; the 4,500 r/min limiting speed is the only speed figure HR1 publishes for track rollers Reading RSTO: yoke roller, no inner ring, no flanges; lateral guidance and contamination protection must come from the machine structure around the 11.8 mm-wide roller Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 32 mm track diameter and 9 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 16 mm seat, and in cam drives and indexing tables the 49 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 11.8 mm width and the published 10.4 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO12?",
        "a": "The RSTO12 is a RSTO yoke-type track roller without inner ring, without axial guidance with 32 mm outside diameter, 16 mm bore and 11.8 mm width, envelope 16×32×11.8 mm. Mass is 49 g."
      },
      {
        "q": "What does the RSTO12 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO12 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×32×11.8 mm and the catalogue ratings are C 9 kN, C0 10.4 kN, Cur 1.56 kN."
      },
      {
        "q": "What is the load capacity of the RSTO12?",
        "a": "The basic dynamic load rating C is 9 kN and the basic static load rating C0 is 10.4 kN; the fatigue load limit Cur is 1.56 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO12?",
        "a": "HR1 lists a limiting speed of 4,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO12?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The 16 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO12",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO12",
      "RSTO12"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO15",
    "brand": "FAG",
    "manufacturer_designation": "RSTO15",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 35,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.1,
    "static_load_kN": 11.1,
    "fatigue_load_limit_kN": 1.67,
    "limiting_speed_rpm": 3300,
    "max_rpm": 3300,
    "weight_g": 50,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×35×11.8 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 9.1 kN and C0 11.1 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.82 reflects a rolling-element pack sized for heavy static track loading, and the 7.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.67 kN at 20 mm bore, equivalent to 0.45 kN of dynamic rating per millimetre — the limiting speed is 3,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.77 kN per millimetre of rolling-element complement mass is 50 g, or 0.12 g per mm² of the 35×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The thick-walled outer ring is the running element — 35 mm outside diameter over a 20 mm pin seat — and is made to roll flat on a mating track rather than inside a housing Reading RSTO: yoke roller, no inner ring, no flanges; lateral guidance and contamination protection must come from the machine structure around the 11.8 mm-wide roller Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 35 mm track diameter and 9.1 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 20 mm seat, and in linear rail and profile track guidance the 50 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 11.8 mm width and the published 11.1 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO15?",
        "a": "The RSTO15 is a RSTO yoke-type track roller without inner ring, without axial guidance with 35 mm outside diameter, 20 mm bore and 11.8 mm width, envelope 20×35×11.8 mm. Mass is 50 g."
      },
      {
        "q": "What does the RSTO15 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO15 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×35×11.8 mm and the catalogue ratings are C 9.1 kN, C0 11.1 kN, Cur 1.67 kN."
      },
      {
        "q": "What is the load capacity of the RSTO15?",
        "a": "The basic dynamic load rating C is 9.1 kN and the basic static load rating C0 is 11.1 kN; the fatigue load limit Cur is 1.67 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO15?",
        "a": "HR1 lists a limiting speed of 3,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO15?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The 20 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO15",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO15",
      "RSTO15"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO17",
    "brand": "FAG",
    "manufacturer_designation": "RSTO17",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 22,
    "D_mm": 40,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.2,
    "static_load_kN": 18.2,
    "fatigue_load_limit_kN": 2.55,
    "limiting_speed_rpm": 2800,
    "max_rpm": 2800,
    "weight_g": 88,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 22×40×15.8 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 22 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 14.2 kN and C0 18.2 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.78 reflects a rolling-element pack sized for heavy static track loading, and the 9.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.55 kN at 22 mm bore, equivalent to 0.65 kN of dynamic rating per millimetre — the limiting speed is 2,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 22 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 0.90 kN per millimetre of rolling-element complement mass is 88 g, or 0.14 g per mm² of the 40×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 22 mm pin bore the 15.8 mm width and 14.2 kN C rating suit high-cycle industrial machinery rather than instrument duty The pin surface at 22 mm must be hardened to 58–64 HRC like a shaft raceway; a soft pin flats quickly under the 18.2 kN static load Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 40 mm track diameter and 14.2 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 22 mm seat, and in automotive welding jig rollers the 88 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 15.8 mm width and the published 18.2 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO17?",
        "a": "The RSTO17 is a RSTO yoke-type track roller without inner ring, without axial guidance with 40 mm outside diameter, 22 mm bore and 15.8 mm width, envelope 22×40×15.8 mm. Mass is 88 g."
      },
      {
        "q": "What does the RSTO17 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO17 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 22×40×15.8 mm and the catalogue ratings are C 14.2 kN, C0 18.2 kN, Cur 2.55 kN."
      },
      {
        "q": "What is the load capacity of the RSTO17?",
        "a": "The basic dynamic load rating C is 14.2 kN and the basic static load rating C0 is 18.2 kN; the fatigue load limit Cur is 2.55 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO17?",
        "a": "HR1 lists a limiting speed of 2,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO17?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The 22 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO17",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO17",
      "RSTO17"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO20",
    "brand": "FAG",
    "manufacturer_designation": "RSTO20",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 47,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.1,
    "static_load_kN": 22,
    "fatigue_load_limit_kN": 3.1,
    "limiting_speed_rpm": 2400,
    "max_rpm": 2400,
    "weight_g": 130,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×47×15.8 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 16.1 kN and C0 22 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.1 kN at 25 mm bore, equivalent to 0.64 kN of dynamic rating per millimetre — the limiting speed is 2,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 1.02 kN per millimetre of rolling-element complement mass is 130 g, or 0.18 g per mm² of the 47×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 25 mm pin bore the 15.8 mm width and 16.1 kN C rating suit high-cycle industrial machinery rather than instrument duty At 130 g the roller adds little inertia to follower linkages, but the unflanged design walks off a skewed track — track parallelism substitutes for the missing guidance RSTO is the basic yoke-type track roller without inner ring and without axial guidance: the needle rollers run directly on a hardened, ground mounting pin Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 47 mm track diameter and 16.1 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 25 mm seat, and in automatic assembly machine carriages the 130 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 15.8 mm width and the published 22 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO20?",
        "a": "The RSTO20 is a RSTO yoke-type track roller without inner ring, without axial guidance with 47 mm outside diameter, 25 mm bore and 15.8 mm width, envelope 25×47×15.8 mm. Mass is 130 g."
      },
      {
        "q": "What does the RSTO20 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO20 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×47×15.8 mm and the catalogue ratings are C 16.1 kN, C0 22 kN, Cur 3.1 kN."
      },
      {
        "q": "What is the load capacity of the RSTO20?",
        "a": "The basic dynamic load rating C is 16.1 kN and the basic static load rating C0 is 22 kN; the fatigue load limit Cur is 3.1 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO20?",
        "a": "HR1 lists a limiting speed of 2,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO20?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The 25 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO20",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO20",
      "RSTO20"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO25",
    "brand": "FAG",
    "manufacturer_designation": "RSTO25",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 52,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.4,
    "static_load_kN": 23.5,
    "fatigue_load_limit_kN": 3.35,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×52×15.8 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 16.4 kN and C0 23.5 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.70 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.35 kN at 30 mm bore, equivalent to 0.55 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 1.04 kN per millimetre of rolling-element complement mass is 150 g, or 0.18 g per mm² of the 52×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 30 mm pin bore this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range With C 16.4 kN and C0 23.5 kN the roller accepts track loads directly; the 1,800 r/min limiting speed is the only speed figure HR1 publishes for track rollers RSTO rollers separate into their components, so the outer ring and needle-cage assembly can be placed in a yoke eye and retained by the pin during build Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 52 mm track diameter and 16.4 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 30 mm seat, and in packaging machine timing mechanisms the 150 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 15.8 mm width and the published 23.5 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO25?",
        "a": "The RSTO25 is a RSTO yoke-type track roller without inner ring, without axial guidance with 52 mm outside diameter, 30 mm bore and 15.8 mm width, envelope 30×52×15.8 mm. Mass is 150 g."
      },
      {
        "q": "What does the RSTO25 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO25 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×52×15.8 mm and the catalogue ratings are C 16.4 kN, C0 23.5 kN, Cur 3.35 kN."
      },
      {
        "q": "What is the load capacity of the RSTO25?",
        "a": "The basic dynamic load rating C is 16.4 kN and the basic static load rating C0 is 23.5 kN; the fatigue load limit Cur is 3.35 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO25?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO25?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The 30 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO25",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO25",
      "RSTO25"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO30",
    "brand": "FAG",
    "manufacturer_designation": "RSTO30",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 38,
    "D_mm": 62,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.1,
    "static_load_kN": 35.5,
    "fatigue_load_limit_kN": 4.8,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 255,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 38×62×19.8 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 38 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 23.1 kN and C0 35.5 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.65 reflects a rolling-element pack sized for heavy static track loading, and the 12.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.8 kN at 38 mm bore, equivalent to 0.61 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 38 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.17 kN per millimetre of rolling-element complement mass is 255 g, or 0.21 g per mm² of the 62×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 38 mm pin bore places this bearing in the medium band, where the 62 mm envelope already carries ratings in the tens of kilonewtons The thick-walled outer ring is the running element — 62 mm outside diameter over a 38 mm pin seat — and is made to roll flat on a mating track rather than inside a housing With C 23.1 kN and C0 35.5 kN the roller accepts track loads directly; the 1,300 r/min limiting speed is the only speed figure HR1 publishes for track rollers Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 62 mm track diameter and 23.1 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 38 mm seat, and in woodworking machine feed tracks the 255 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 19.8 mm width and the published 35.5 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 62 mm outer ring does.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 62 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO30?",
        "a": "The RSTO30 is a RSTO yoke-type track roller without inner ring, without axial guidance with 62 mm outside diameter, 38 mm bore and 19.8 mm width, envelope 38×62×19.8 mm. Mass is 255 g."
      },
      {
        "q": "What does the RSTO30 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO30 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 38×62×19.8 mm and the catalogue ratings are C 23.1 kN, C0 35.5 kN, Cur 4.8 kN."
      },
      {
        "q": "What is the load capacity of the RSTO30?",
        "a": "The basic dynamic load rating C is 23.1 kN and the basic static load rating C0 is 35.5 kN; the fatigue load limit Cur is 4.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO30?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO30?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The 38 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO30",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO30",
      "RSTO30"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO35",
    "brand": "FAG",
    "manufacturer_designation": "RSTO35",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 42,
    "D_mm": 72,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 25,
    "static_load_kN": 41,
    "fatigue_load_limit_kN": 5.5,
    "limiting_speed_rpm": 1100,
    "max_rpm": 1100,
    "weight_g": 375,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 42×72×19.8 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 42 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 25 kN and C0 41 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.61 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.5 kN at 42 mm bore, equivalent to 0.60 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 42 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.26 kN per millimetre of rolling-element complement mass is 375 g, or 0.26 g per mm² of the 72×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 42 mm pin bore marks the medium range: mounting forces and fits become critical, and the 375 g mass calls for proper induction or press tooling rather than hand fitting Reading RSTO: yoke roller, no inner ring, no flanges; lateral guidance and contamination protection must come from the machine structure around the 19.8 mm-wide roller RSTO rollers separate into their components, so the outer ring and needle-cage assembly can be placed in a yoke eye and retained by the pin during build Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 72 mm track diameter and 25 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 42 mm seat, and in automatic assembly machine carriages the 375 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 19.8 mm width and the published 41 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO35?",
        "a": "The RSTO35 is a RSTO yoke-type track roller without inner ring, without axial guidance with 72 mm outside diameter, 42 mm bore and 19.8 mm width, envelope 42×72×19.8 mm. Mass is 375 g."
      },
      {
        "q": "What does the RSTO35 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO35 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 42×72×19.8 mm and the catalogue ratings are C 25 kN, C0 41 kN, Cur 5.5 kN."
      },
      {
        "q": "What is the load capacity of the RSTO35?",
        "a": "The basic dynamic load rating C is 25 kN and the basic static load rating C0 is 41 kN; the fatigue load limit Cur is 5.5 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO35?",
        "a": "HR1 lists a limiting speed of 1,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO35?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The 42 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO35",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO35",
      "RSTO35"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO40",
    "brand": "FAG",
    "manufacturer_designation": "RSTO40",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 80,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.7,
    "static_load_kN": 40,
    "fatigue_load_limit_kN": 6,
    "limiting_speed_rpm": 850,
    "max_rpm": 850,
    "weight_g": 420,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×80×19.8 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 23.7 kN and C0 40 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6 kN at 50 mm bore, equivalent to 0.47 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.20 kN per millimetre of rolling-element complement mass is 420 g, or 0.27 g per mm² of the 80×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 50 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 19.8 mm width as a standard mounting space With C 23.7 kN and C0 40 kN the roller accepts track loads directly; the 850 r/min limiting speed is the only speed figure HR1 publishes for track rollers At 420 g the roller adds little inertia to follower linkages, but the unflanged design walks off a skewed track — track parallelism substitutes for the missing guidance Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 80 mm track diameter and 23.7 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 50 mm seat, and in automotive welding jig rollers the 420 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 19.8 mm width and the published 40 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO40?",
        "a": "The RSTO40 is a RSTO yoke-type track roller without inner ring, without axial guidance with 80 mm outside diameter, 50 mm bore and 19.8 mm width, envelope 50×80×19.8 mm. Mass is 420 g."
      },
      {
        "q": "What does the RSTO40 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO40 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 50×80×19.8 mm and the catalogue ratings are C 23.7 kN, C0 40 kN, Cur 6 kN."
      },
      {
        "q": "What is the load capacity of the RSTO40?",
        "a": "The basic dynamic load rating C is 23.7 kN and the basic static load rating C0 is 40 kN; the fatigue load limit Cur is 6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO40?",
        "a": "HR1 lists a limiting speed of 850 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO40?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The 50 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO40",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO40",
      "RSTO40"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO45",
    "brand": "FAG",
    "manufacturer_designation": "RSTO45",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 55,
    "D_mm": 85,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 25,
    "static_load_kN": 44,
    "fatigue_load_limit_kN": 6,
    "limiting_speed_rpm": 750,
    "max_rpm": 750,
    "weight_g": 453,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 55×85×19.8 mm: the 85 mm outside diameter is the track-running surface — a thick-walled outer ring over a 55 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 25 kN and C0 44 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.57 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6 kN at 55 mm bore, equivalent to 0.45 kN of dynamic rating per millimetre — the limiting speed is 750 r/min and, as for HR1 track rollers, no thermal reference speed is published the 55 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.26 kN per millimetre of rolling-element complement mass is 453 g, or 0.27 g per mm² of the 85×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 55 mm pin bore places this bearing in the medium band, where the 85 mm envelope already carries ratings in the tens of kilonewtons RSTO is the basic yoke-type track roller without inner ring and without axial guidance: the needle rollers run directly on a hardened, ground mounting pin The pin surface at 55 mm must be hardened to 58–64 HRC like a shaft raceway; a soft pin flats quickly under the 44 kN static load Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 85 mm track diameter and 25 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 55 mm seat, and in woodworking machine feed tracks the 453 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 19.8 mm width and the published 44 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 85 mm outer ring does. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 85 mm outer ring does.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO45?",
        "a": "The RSTO45 is a RSTO yoke-type track roller without inner ring, without axial guidance with 85 mm outside diameter, 55 mm bore and 19.8 mm width, envelope 55×85×19.8 mm. Mass is 453 g."
      },
      {
        "q": "What does the RSTO45 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO45 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 55×85×19.8 mm and the catalogue ratings are C 25 kN, C0 44 kN, Cur 6 kN."
      },
      {
        "q": "What is the load capacity of the RSTO45?",
        "a": "The basic dynamic load rating C is 25 kN and the basic static load rating C0 is 44 kN; the fatigue load limit Cur is 6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO45?",
        "a": "HR1 lists a limiting speed of 750 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO45?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 85 mm outer surface tolerates only small angular error. The 55 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO45",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO45",
      "RSTO45"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RSTO50",
    "brand": "FAG",
    "manufacturer_designation": "RSTO50",
    "series": "rsto-series",
    "type": "support_roller",
    "d_mm": 60,
    "D_mm": 90,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 25.5,
    "static_load_kN": 47,
    "fatigue_load_limit_kN": 6.4,
    "limiting_speed_rpm": 650,
    "max_rpm": 650,
    "weight_g": 481,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 60×90×19.8 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 60 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 25.5 kN and C0 47 kN for the RSTO yoke-type track roller without inner ring, without axial guidance; the C/C0 ratio of 0.54 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6.4 kN at 60 mm bore, equivalent to 0.42 kN of dynamic rating per millimetre — the limiting speed is 650 r/min and, as for HR1 track rollers, no thermal reference speed is published the 60 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.29 kN per millimetre of rolling-element complement mass is 481 g, or 0.27 g per mm² of the 90×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 60 mm pin bore marks the medium range: mounting forces and fits become critical, and the 481 g mass calls for proper induction or press tooling rather than hand fitting Reading RSTO: yoke roller, no inner ring, no flanges; lateral guidance and contamination protection must come from the machine structure around the 19.8 mm-wide roller At 481 g the roller adds little inertia to follower linkages, but the unflanged design walks off a skewed track — track parallelism substitutes for the missing guidance Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 90 mm track diameter and 25.5 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 60 mm seat, and in cam drives and indexing tables the 481 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 19.8 mm width and the published 47 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 90 mm outer ring does. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 90 mm outer ring does.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RSTO50?",
        "a": "The RSTO50 is a RSTO yoke-type track roller without inner ring, without axial guidance with 90 mm outside diameter, 60 mm bore and 19.8 mm width, envelope 60×90×19.8 mm. Mass is 481 g."
      },
      {
        "q": "What does the RSTO50 designation mean in the FAG/INA HR1 catalogue?",
        "a": "RSTO50 identifies this RSTO yoke-type track roller without inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 60×90×19.8 mm and the catalogue ratings are C 25.5 kN, C0 47 kN, Cur 6.4 kN."
      },
      {
        "q": "What is the load capacity of the RSTO50?",
        "a": "The basic dynamic load rating C is 25.5 kN and the basic static load rating C0 is 47 kN; the fatigue load limit Cur is 6.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RSTO50?",
        "a": "HR1 lists a limiting speed of 650 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RSTO50?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The 60 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RSTO50",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RSTO50",
      "RSTO50"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO6-TV",
    "brand": "FAG",
    "manufacturer_designation": "STO6-TV",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 9.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "polymer_PA66",
    "dynamic_load_kN": 3.75,
    "static_load_kN": 4.6,
    "fatigue_load_limit_kN": 0.66,
    "limiting_speed_rpm": 10000,
    "max_rpm": 10000,
    "weight_g": 17,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 6×19×9.8 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm bore — and the 9.8 mm width sets the contact width on the mating track the catalogue lists C 3.75 kN and C0 4.6 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.82 reflects a rolling-element pack sized for heavy static track loading, and the 6.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.66 kN at 6 mm bore, equivalent to 0.63 kN of dynamic rating per millimetre — the limiting speed is 10,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 mm bore takes the mounting pin or shaft; across the 9.8 mm contact width the dynamic rating works out to 0.38 kN per millimetre of rolling-element complement mass is 17 g, or 0.09 g per mm² of the 19×9.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 6 mm pin bore sits in the miniature band; at 9.8 mm wide the STO6-TV is built into compact cam drives, indexing pawls and light linkages The thick-walled 19 mm outer ring rolls directly on a flat track while the inner ring protects an ordinary machined pin from the needle-roller contact Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary The -TV cage is part of the speed story here: cage-guided kinematics permit the published 10,000 r/min limiting speed without roller-to-roller sliding. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 19 mm track diameter and 3.75 kN dynamic rating match the duty. In robotic arm linear axes the unit fits a compact 6 mm seat, and in agricultural and textile cam followers the 17 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 9.8 mm width and the published 4.6 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 19 mm outer ring does.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 19 mm outer ring does.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO6-TV?",
        "a": "The STO6-TV is a STO yoke-type track roller with inner ring, without axial guidance with 19 mm outside diameter, 6 mm bore and 9.8 mm width, envelope 6×19×9.8 mm. Mass is 17 g."
      },
      {
        "q": "What does the STO6-TV designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO6-TV identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×19×9.8 mm and the catalogue ratings are C 3.75 kN, C0 4.6 kN, Cur 0.66 kN."
      },
      {
        "q": "What is the load capacity of the STO6-TV?",
        "a": "The basic dynamic load rating C is 3.75 kN and the basic static load rating C0 is 4.6 kN; the fatigue load limit Cur is 0.66 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO6-TV?",
        "a": "HR1 lists a limiting speed of 10,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO6-TV?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The inner ring lets the 6 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO6",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO6-TV",
      "STO6-TV"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO8-TV",
    "brand": "FAG",
    "manufacturer_designation": "STO8-TV",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 9.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "polymer_PA66",
    "dynamic_load_kN": 4.2,
    "static_load_kN": 5.6,
    "fatigue_load_limit_kN": 0.8,
    "limiting_speed_rpm": 8000,
    "max_rpm": 8000,
    "weight_g": 26,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 8×24×9.8 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm bore — and the 9.8 mm width sets the contact width on the mating track the catalogue lists C 4.2 kN and C0 5.6 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.75 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.8 kN at 8 mm bore, equivalent to 0.53 kN of dynamic rating per millimetre — the limiting speed is 8,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm bore takes the mounting pin or shaft; across the 9.8 mm contact width the dynamic rating works out to 0.43 kN per millimetre of rolling-element complement mass is 26 g, or 0.11 g per mm² of the 24×9.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 8 mm pin bore sits in the miniature band; at 9.8 mm wide the STO8-TV is built into compact cam drives, indexing pawls and light linkages Reading STO: yoke roller with inner ring, no flanges; the 9.8 mm-wide unit is located laterally by housing shoulders or circlips rather than by integral ribs The thick-walled 24 mm outer ring rolls directly on a flat track while the inner ring protects an ordinary machined pin from the needle-roller contact Reading -TV: an injection-moulded polyamide cage guides the rolling elements — the lightweight choice that keeps the mass at 26 g in the 24 mm envelope. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 24 mm track diameter and 4.2 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 8 mm seat, and in packaging machine timing mechanisms the 26 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 9.8 mm width and the published 5.6 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 24 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO8-TV?",
        "a": "The STO8-TV is a STO yoke-type track roller with inner ring, without axial guidance with 24 mm outside diameter, 8 mm bore and 9.8 mm width, envelope 8×24×9.8 mm. Mass is 26 g."
      },
      {
        "q": "What does the STO8-TV designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO8-TV identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×24×9.8 mm and the catalogue ratings are C 4.2 kN, C0 5.6 kN, Cur 0.8 kN."
      },
      {
        "q": "What is the load capacity of the STO8-TV?",
        "a": "The basic dynamic load rating C is 4.2 kN and the basic static load rating C0 is 5.6 kN; the fatigue load limit Cur is 0.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO8-TV?",
        "a": "HR1 lists a limiting speed of 8,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO8-TV?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The inner ring lets the 8 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO8",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO8-TV",
      "STO8-TV"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO10",
    "brand": "FAG",
    "manufacturer_designation": "STO10",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 8.4,
    "static_load_kN": 9.5,
    "fatigue_load_limit_kN": 1.39,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 49,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×30×11.8 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 8.4 kN and C0 9.5 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.88 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.39 kN at 10 mm bore, equivalent to 0.84 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.71 kN per millimetre of rolling-element complement mass is 49 g, or 0.14 g per mm² of the 30×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 10 mm pin bore sits in the miniature band; at 11.8 mm wide the STO10 is built into compact cam drives, indexing pawls and light linkages At 49 g the roller suits small indexing and transfer mechanisms; without flanges a bent pin or angled track produces edge loading at the outer-ring lips Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 30 mm track diameter and 8.4 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 10 mm seat, and in woodworking machine feed tracks the 49 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 11.8 mm width and the published 9.5 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO10?",
        "a": "The STO10 is a STO yoke-type track roller with inner ring, without axial guidance with 30 mm outside diameter, 10 mm bore and 11.8 mm width, envelope 10×30×11.8 mm. Mass is 49 g."
      },
      {
        "q": "What does the STO10 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO10 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×30×11.8 mm and the catalogue ratings are C 8.4 kN, C0 9.5 kN, Cur 1.39 kN."
      },
      {
        "q": "What is the load capacity of the STO10?",
        "a": "The basic dynamic load rating C is 8.4 kN and the basic static load rating C0 is 9.5 kN; the fatigue load limit Cur is 1.39 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO10?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO10?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The inner ring lets the 10 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO10",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO10",
      "STO10"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO12",
    "brand": "FAG",
    "manufacturer_designation": "STO12",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9,
    "static_load_kN": 10.4,
    "fatigue_load_limit_kN": 1.56,
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500,
    "weight_g": 57,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×32×11.8 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 9 kN and C0 10.4 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.87 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.56 kN at 12 mm bore, equivalent to 0.75 kN of dynamic rating per millimetre — the limiting speed is 4,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.76 kN per millimetre of rolling-element complement mass is 57 g, or 0.15 g per mm² of the 32×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 12 mm pin bore and only 57 g: the smallest sizes demand accurate shaft geometry, because the 10.0 mm section leaves no tolerance for a soft or tapered seat C 9 kN and C0 10.4 kN already account for outer-ring bending between supports; the limiting speed is 4,500 r/min with no reference speed given STO is the basic yoke-type track roller with inner ring and without axial guidance: it runs on a normal-tolerance pin through its 12 mm bore Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 32 mm track diameter and 9 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 12 mm seat, and in glass and ceramic line conveyors the 57 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 11.8 mm width and the published 10.4 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 32 mm outer ring does. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 32 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO12?",
        "a": "The STO12 is a STO yoke-type track roller with inner ring, without axial guidance with 32 mm outside diameter, 12 mm bore and 11.8 mm width, envelope 12×32×11.8 mm. Mass is 57 g."
      },
      {
        "q": "What does the STO12 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO12 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×11.8 mm and the catalogue ratings are C 9 kN, C0 10.4 kN, Cur 1.56 kN."
      },
      {
        "q": "What is the load capacity of the STO12?",
        "a": "The basic dynamic load rating C is 9 kN and the basic static load rating C0 is 10.4 kN; the fatigue load limit Cur is 1.56 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO12?",
        "a": "HR1 lists a limiting speed of 4,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO12?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The inner ring lets the 12 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO12",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO12",
      "STO12"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO15",
    "brand": "FAG",
    "manufacturer_designation": "STO15",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.1,
    "static_load_kN": 11.1,
    "fatigue_load_limit_kN": 1.67,
    "limiting_speed_rpm": 3300,
    "max_rpm": 3300,
    "weight_g": 63,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×11.8 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 9.1 kN and C0 11.1 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.82 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.67 kN at 15 mm bore, equivalent to 0.61 kN of dynamic rating per millimetre — the limiting speed is 3,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.77 kN per millimetre of rolling-element complement mass is 63 g, or 0.15 g per mm² of the 35×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 15 mm pin bore the 11.8 mm width and 9.1 kN C rating suit high-cycle industrial machinery rather than instrument duty STO is the basic yoke-type track roller with inner ring and without axial guidance: it runs on a normal-tolerance pin through its 15 mm bore At 63 g the roller suits small indexing and transfer mechanisms; without flanges a bent pin or angled track produces edge loading at the outer-ring lips Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 35 mm track diameter and 9.1 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 15 mm seat, and in automotive welding jig rollers the 63 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 11.8 mm width and the published 11.1 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO15?",
        "a": "The STO15 is a STO yoke-type track roller with inner ring, without axial guidance with 35 mm outside diameter, 15 mm bore and 11.8 mm width, envelope 15×35×11.8 mm. Mass is 63 g."
      },
      {
        "q": "What does the STO15 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO15 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×35×11.8 mm and the catalogue ratings are C 9.1 kN, C0 11.1 kN, Cur 1.67 kN."
      },
      {
        "q": "What is the load capacity of the STO15?",
        "a": "The basic dynamic load rating C is 9.1 kN and the basic static load rating C0 is 11.1 kN; the fatigue load limit Cur is 1.67 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO15?",
        "a": "HR1 lists a limiting speed of 3,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO15?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO15",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO15",
      "STO15"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO17",
    "brand": "FAG",
    "manufacturer_designation": "STO17",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.2,
    "static_load_kN": 18.2,
    "fatigue_load_limit_kN": 2.55,
    "limiting_speed_rpm": 2800,
    "max_rpm": 2800,
    "weight_g": 107,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×15.8 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 14.2 kN and C0 18.2 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.78 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.55 kN at 17 mm bore, equivalent to 0.84 kN of dynamic rating per millimetre — the limiting speed is 2,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 0.90 kN per millimetre of rolling-element complement mass is 107 g, or 0.17 g per mm² of the 40×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 17 mm pin bore this size balances the 40 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Reading STO: yoke roller with inner ring, no flanges; the 15.8 mm-wide unit is located laterally by housing shoulders or circlips rather than by integral ribs Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 40 mm track diameter and 14.2 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 17 mm seat, and in robotic arm linear axes the 107 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 15.8 mm width and the published 18.2 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO17?",
        "a": "The STO17 is a STO yoke-type track roller with inner ring, without axial guidance with 40 mm outside diameter, 17 mm bore and 15.8 mm width, envelope 17×40×15.8 mm. Mass is 107 g."
      },
      {
        "q": "What does the STO17 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO17 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×40×15.8 mm and the catalogue ratings are C 14.2 kN, C0 18.2 kN, Cur 2.55 kN."
      },
      {
        "q": "What is the load capacity of the STO17?",
        "a": "The basic dynamic load rating C is 14.2 kN and the basic static load rating C0 is 18.2 kN; the fatigue load limit Cur is 2.55 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO17?",
        "a": "HR1 lists a limiting speed of 2,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO17?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO17",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO17",
      "STO17"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO20",
    "brand": "FAG",
    "manufacturer_designation": "STO20",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.1,
    "static_load_kN": 22,
    "fatigue_load_limit_kN": 3.1,
    "limiting_speed_rpm": 2400,
    "max_rpm": 2400,
    "weight_g": 152,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×15.8 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 16.1 kN and C0 22 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.1 kN at 20 mm bore, equivalent to 0.81 kN of dynamic rating per millimetre — the limiting speed is 2,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 1.02 kN per millimetre of rolling-element complement mass is 152 g, or 0.20 g per mm² of the 47×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm pin bore this size balances the 47 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range STO rollers are used on cam tracks and rail guidance where sealing is handled externally; the open form is easy to relubricate through the pin where drilled Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 47 mm track diameter and 16.1 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 20 mm seat, and in conveyor transfer and diverting stations the 152 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 15.8 mm width and the published 22 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO20?",
        "a": "The STO20 is a STO yoke-type track roller with inner ring, without axial guidance with 47 mm outside diameter, 20 mm bore and 15.8 mm width, envelope 20×47×15.8 mm. Mass is 152 g."
      },
      {
        "q": "What does the STO20 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO20 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×15.8 mm and the catalogue ratings are C 16.1 kN, C0 22 kN, Cur 3.1 kN."
      },
      {
        "q": "What is the load capacity of the STO20?",
        "a": "The basic dynamic load rating C is 16.1 kN and the basic static load rating C0 is 22 kN; the fatigue load limit Cur is 3.1 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO20?",
        "a": "HR1 lists a limiting speed of 2,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO20?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO20",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO20",
      "STO20"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO25",
    "brand": "FAG",
    "manufacturer_designation": "STO25",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.4,
    "static_load_kN": 23.5,
    "fatigue_load_limit_kN": 3.35,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 177,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×15.8 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 16.4 kN and C0 23.5 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.70 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.35 kN at 25 mm bore, equivalent to 0.66 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 1.04 kN per millimetre of rolling-element complement mass is 177 g, or 0.22 g per mm² of the 52×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 25 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 52 mm track diameter and 16.4 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 25 mm seat, and in cam drives and indexing tables the 177 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 15.8 mm width and the published 23.5 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO25?",
        "a": "The STO25 is a STO yoke-type track roller with inner ring, without axial guidance with 52 mm outside diameter, 25 mm bore and 15.8 mm width, envelope 25×52×15.8 mm. Mass is 177 g."
      },
      {
        "q": "What does the STO25 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO25 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×52×15.8 mm and the catalogue ratings are C 16.4 kN, C0 23.5 kN, Cur 3.35 kN."
      },
      {
        "q": "What is the load capacity of the STO25?",
        "a": "The basic dynamic load rating C is 16.4 kN and the basic static load rating C0 is 23.5 kN; the fatigue load limit Cur is 3.35 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO25?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO25?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO25",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO25",
      "STO25"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO30",
    "brand": "FAG",
    "manufacturer_designation": "STO30",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.1,
    "static_load_kN": 35.5,
    "fatigue_load_limit_kN": 4.8,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 308,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×19.8 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 23.1 kN and C0 35.5 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.65 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.8 kN at 30 mm bore, equivalent to 0.77 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.17 kN per millimetre of rolling-element complement mass is 308 g, or 0.25 g per mm² of the 62×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 30 mm pin bore the 19.8 mm width and 23.1 kN C rating suit high-cycle industrial machinery rather than instrument duty Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 62 mm track diameter and 23.1 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 30 mm seat, and in printing press sheet-transfer grippers the 308 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 19.8 mm width and the published 35.5 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO30?",
        "a": "The STO30 is a STO yoke-type track roller with inner ring, without axial guidance with 62 mm outside diameter, 30 mm bore and 19.8 mm width, envelope 30×62×19.8 mm. Mass is 308 g."
      },
      {
        "q": "What does the STO30 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO30 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×62×19.8 mm and the catalogue ratings are C 23.1 kN, C0 35.5 kN, Cur 4.8 kN."
      },
      {
        "q": "What is the load capacity of the STO30?",
        "a": "The basic dynamic load rating C is 23.1 kN and the basic static load rating C0 is 35.5 kN; the fatigue load limit Cur is 4.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO30?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO30?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO30",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO30",
      "STO30"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO35",
    "brand": "FAG",
    "manufacturer_designation": "STO35",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 25,
    "static_load_kN": 41,
    "fatigue_load_limit_kN": 5.5,
    "limiting_speed_rpm": 1100,
    "max_rpm": 1100,
    "weight_g": 441,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×72×19.8 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 25 kN and C0 41 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.61 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.5 kN at 35 mm bore, equivalent to 0.71 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.26 kN per millimetre of rolling-element complement mass is 441 g, or 0.31 g per mm² of the 72×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 35 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 19.8 mm width as a standard mounting space STO rollers are used on cam tracks and rail guidance where sealing is handled externally; the open form is easy to relubricate through the pin where drilled At 441 g the roller suits small indexing and transfer mechanisms; without flanges a bent pin or angled track produces edge loading at the outer-ring lips Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 72 mm track diameter and 25 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 35 mm seat, and in conveyor transfer and diverting stations the 441 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 19.8 mm width and the published 41 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO35?",
        "a": "The STO35 is a STO yoke-type track roller with inner ring, without axial guidance with 72 mm outside diameter, 35 mm bore and 19.8 mm width, envelope 35×72×19.8 mm. Mass is 441 g."
      },
      {
        "q": "What does the STO35 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO35 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 35×72×19.8 mm and the catalogue ratings are C 25 kN, C0 41 kN, Cur 5.5 kN."
      },
      {
        "q": "What is the load capacity of the STO35?",
        "a": "The basic dynamic load rating C is 25 kN and the basic static load rating C0 is 41 kN; the fatigue load limit Cur is 5.5 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO35?",
        "a": "HR1 lists a limiting speed of 1,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO35?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO35",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO35",
      "STO35"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO40",
    "brand": "FAG",
    "manufacturer_designation": "STO40",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.7,
    "static_load_kN": 40,
    "fatigue_load_limit_kN": 6,
    "limiting_speed_rpm": 850,
    "max_rpm": 850,
    "weight_g": 530,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×80×19.8 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 23.7 kN and C0 40 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6 kN at 40 mm bore, equivalent to 0.59 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.20 kN per millimetre of rolling-element complement mass is 530 g, or 0.33 g per mm² of the 80×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 40 mm pin bore places this bearing in the medium band, where the 80 mm envelope already carries ratings in the tens of kilonewtons C 23.7 kN and C0 40 kN already account for outer-ring bending between supports; the limiting speed is 850 r/min with no reference speed given Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 80 mm track diameter and 23.7 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 40 mm seat, and in robotic arm linear axes the 530 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 19.8 mm width and the published 40 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO40?",
        "a": "The STO40 is a STO yoke-type track roller with inner ring, without axial guidance with 80 mm outside diameter, 40 mm bore and 19.8 mm width, envelope 40×80×19.8 mm. Mass is 530 g."
      },
      {
        "q": "What does the STO40 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO40 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 40×80×19.8 mm and the catalogue ratings are C 23.7 kN, C0 40 kN, Cur 6 kN."
      },
      {
        "q": "What is the load capacity of the STO40?",
        "a": "The basic dynamic load rating C is 23.7 kN and the basic static load rating C0 is 40 kN; the fatigue load limit Cur is 6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO40?",
        "a": "HR1 lists a limiting speed of 850 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO40?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO40",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO40",
      "STO40"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO45",
    "brand": "FAG",
    "manufacturer_designation": "STO45",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 85,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 25,
    "static_load_kN": 44,
    "fatigue_load_limit_kN": 6,
    "limiting_speed_rpm": 750,
    "max_rpm": 750,
    "weight_g": 576,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 45×85×19.8 mm: the 85 mm outside diameter is the track-running surface — a thick-walled outer ring over a 45 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 25 kN and C0 44 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.57 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6 kN at 45 mm bore, equivalent to 0.56 kN of dynamic rating per millimetre — the limiting speed is 750 r/min and, as for HR1 track rollers, no thermal reference speed is published the 45 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.26 kN per millimetre of rolling-element complement mass is 576 g, or 0.34 g per mm² of the 85×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 45 mm pin bore marks the medium range: mounting forces and fits become critical, and the 576 g mass calls for proper induction or press tooling rather than hand fitting Reading STO: yoke roller with inner ring, no flanges; the 19.8 mm-wide unit is located laterally by housing shoulders or circlips rather than by integral ribs Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 85 mm track diameter and 25 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 45 mm seat, and in printing press sheet-transfer grippers the 576 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 19.8 mm width and the published 44 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO45?",
        "a": "The STO45 is a STO yoke-type track roller with inner ring, without axial guidance with 85 mm outside diameter, 45 mm bore and 19.8 mm width, envelope 45×85×19.8 mm. Mass is 576 g."
      },
      {
        "q": "What does the STO45 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO45 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 45×85×19.8 mm and the catalogue ratings are C 25 kN, C0 44 kN, Cur 6 kN."
      },
      {
        "q": "What is the load capacity of the STO45?",
        "a": "The basic dynamic load rating C is 25 kN and the basic static load rating C0 is 44 kN; the fatigue load limit Cur is 6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO45?",
        "a": "HR1 lists a limiting speed of 750 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO45?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 85 mm outer surface tolerates only small angular error. The inner ring lets the 45 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO45",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO45",
      "STO45"
    ],
    "locale_variants": {}
  },
  {
    "sku": "STO50",
    "brand": "FAG",
    "manufacturer_designation": "STO50",
    "series": "sto-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 25.5,
    "static_load_kN": 47,
    "fatigue_load_limit_kN": 6.4,
    "limiting_speed_rpm": 650,
    "max_rpm": 650,
    "weight_g": 617,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×90×19.8 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 25.5 kN and C0 47 kN for the STO yoke-type track roller with inner ring, without axial guidance; the C/C0 ratio of 0.54 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6.4 kN at 50 mm bore, equivalent to 0.51 kN of dynamic rating per millimetre — the limiting speed is 650 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 1.29 kN per millimetre of rolling-element complement mass is 617 g, or 0.35 g per mm² of the 90×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 50 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 19.8 mm width as a standard mounting space Reading STO: yoke roller with inner ring, no flanges; the 19.8 mm-wide unit is located laterally by housing shoulders or circlips rather than by integral ribs Because the inner ring is supplied, the mounting pin only needs standard bearing-seat tolerance and surface — hardening to raceway quality is unnecessary Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 90 mm track diameter and 25.5 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 50 mm seat, and in glass and ceramic line conveyors the 617 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 19.8 mm width and the published 47 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO50?",
        "a": "The STO50 is a STO yoke-type track roller with inner ring, without axial guidance with 90 mm outside diameter, 50 mm bore and 19.8 mm width, envelope 50×90×19.8 mm. Mass is 617 g."
      },
      {
        "q": "What does the STO50 designation mean in the FAG/INA HR1 catalogue?",
        "a": "STO50 identifies this STO yoke-type track roller with inner ring, without axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 50×90×19.8 mm and the catalogue ratings are C 25.5 kN, C0 47 kN, Cur 6.4 kN."
      },
      {
        "q": "What is the load capacity of the STO50?",
        "a": "The basic dynamic load rating C is 25.5 kN and the basic static load rating C0 is 47 kN; the fatigue load limit Cur is 6.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the STO50?",
        "a": "HR1 lists a limiting speed of 650 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the STO50?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO50",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1448",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO50",
      "STO50"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA22-6-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA22/6-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 19,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.9,
    "static_load_kN": 3.7,
    "fatigue_load_limit_kN": 0.495,
    "limiting_speed_rpm": 9000,
    "max_rpm": 9000,
    "weight_g": 18,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×19×11.8 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 3.9 kN and C0 3.7 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 1.05 reflects a rolling-element pack sized for heavy static track loading, and the 4.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.495 kN at 10 mm bore, equivalent to 0.39 kN of dynamic rating per millimetre — the limiting speed is 9,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.33 kN per millimetre of rolling-element complement mass is 18 g, or 0.08 g per mm² of the 19×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 10 mm pin bore and only 18 g: the smallest sizes demand accurate shaft geometry, because the 4.5 mm section leaves no tolerance for a soft or tapered seat C 3.9 kN, C0 3.7 kN and Cur 0.495 kN are the track-load ratings; the sealed lips reduce the limiting speed to 9,000 r/min Choose RNA22 over RSTO where the environment carries abrasives: the 2RSR lips protect the needle complement but cannot be inspected or replaced without scrapping the unit Reading the suffix: 2RSR is the FAG/INA code for rubbing lip seals at both faces, making the 10 mm-bore unit greased for life. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 19 mm track diameter and 3.9 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 10 mm seat, and in robotic arm linear axes the 18 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 11.8 mm width and the published 3.7 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA22/6-2RSR?",
        "a": "The RNA22/6-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 19 mm outside diameter, 10 mm bore and 11.8 mm width, envelope 10×19×11.8 mm. Mass is 18 g."
      },
      {
        "q": "What does the RNA22/6-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA22/6-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×19×11.8 mm and the catalogue ratings are C 3.9 kN, C0 3.7 kN, Cur 0.495 kN."
      },
      {
        "q": "What is the load capacity of the RNA22/6-2RSR?",
        "a": "The basic dynamic load rating C is 3.9 kN and the basic static load rating C0 is 3.7 kN; the fatigue load limit Cur is 0.495 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA22/6-2RSR?",
        "a": "HR1 lists a limiting speed of 9,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA22/6-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The 10 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA22",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA22-6-2RSR",
      "RNA22/6-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA22-8-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA22/8-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 24,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 4.8,
    "static_load_kN": 4.3,
    "fatigue_load_limit_kN": 0.65,
    "limiting_speed_rpm": 7000,
    "max_rpm": 7000,
    "weight_g": 29,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×24×11.8 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 4.8 kN and C0 4.3 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 1.12 reflects a rolling-element pack sized for heavy static track loading, and the 6.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.65 kN at 12 mm bore, equivalent to 0.40 kN of dynamic rating per millimetre — the limiting speed is 7,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.41 kN per millimetre of rolling-element complement mass is 29 g, or 0.10 g per mm² of the 24×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 12 mm pin bore sits in the miniature band; at 11.8 mm wide the RNA22/8-2RSR is built into compact cam drives, indexing pawls and light linkages Choose RNA22 over RSTO where the environment carries abrasives: the 2RSR lips protect the needle complement but cannot be inspected or replaced without scrapping the unit No axial guidance is built in, so the yoke structure must locate the 29 roller laterally; the crowned outer surface tolerates only small track skew 2RSR means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 7,000 r/min. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 24 mm track diameter and 4.8 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 12 mm seat, and in robotic arm linear axes the 29 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 11.8 mm width and the published 4.3 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA22/8-2RSR?",
        "a": "The RNA22/8-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 24 mm outside diameter, 12 mm bore and 11.8 mm width, envelope 12×24×11.8 mm. Mass is 29 g."
      },
      {
        "q": "What does the RNA22/8-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA22/8-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×24×11.8 mm and the catalogue ratings are C 4.8 kN, C0 4.3 kN, Cur 0.65 kN."
      },
      {
        "q": "What is the load capacity of the RNA22/8-2RSR?",
        "a": "The basic dynamic load rating C is 4.8 kN and the basic static load rating C0 is 4.3 kN; the fatigue load limit Cur is 0.65 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA22/8-2RSR?",
        "a": "HR1 lists a limiting speed of 7,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA22/8-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The 12 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA22",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA22-8-2RSR",
      "RNA22/8-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2200-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2200-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 14,
    "D_mm": 30,
    "B_mm": 13.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7,
    "static_load_kN": 6.9,
    "fatigue_load_limit_kN": 1.12,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 52,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 14×30×13.8 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 14 mm bore — and the 13.8 mm width sets the contact width on the mating track the catalogue lists C 7 kN and C0 6.9 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 1.01 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.12 kN at 14 mm bore, equivalent to 0.50 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 14 mm bore takes the mounting pin or shaft; across the 13.8 mm contact width the dynamic rating works out to 0.51 kN per millimetre of rolling-element complement mass is 52 g, or 0.13 g per mm² of the 30×13.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 14 mm pin bore this size balances the 30 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range Reading RNA22..2RSR: flangeless yoke roller, sealed for life on both sides, no inner ring; the 13.8 mm width includes the seal recesses RNA22 is the sealed yoke-type track roller without inner ring: 2RSR contact seals on both sides retain the factory grease and exclude dust, and the needles run on a hardened pin 2RSR means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 5,500 r/min. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 30 mm track diameter and 7 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 14 mm seat, and in glass and ceramic line conveyors the 52 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 13.8 mm width and the published 6.9 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2200-2RSR?",
        "a": "The RNA2200-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 30 mm outside diameter, 14 mm bore and 13.8 mm width, envelope 14×30×13.8 mm. Mass is 52 g."
      },
      {
        "q": "What does the RNA2200-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2200-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 14×30×13.8 mm and the catalogue ratings are C 7 kN, C0 6.9 kN, Cur 1.12 kN."
      },
      {
        "q": "What is the load capacity of the RNA2200-2RSR?",
        "a": "The basic dynamic load rating C is 7 kN and the basic static load rating C0 is 6.9 kN; the fatigue load limit Cur is 1.12 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2200-2RSR?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2200-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The 14 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2200",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2200-2RSR",
      "RNA2200-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2201-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2201-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 16,
    "D_mm": 32,
    "B_mm": 13.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.5,
    "static_load_kN": 8.3,
    "fatigue_load_limit_kN": 1.29,
    "limiting_speed_rpm": 4700,
    "max_rpm": 4700,
    "weight_g": 57,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 16×32×13.8 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 16 mm bore — and the 13.8 mm width sets the contact width on the mating track the catalogue lists C 7.5 kN and C0 8.3 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.90 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.29 kN at 16 mm bore, equivalent to 0.47 kN of dynamic rating per millimetre — the limiting speed is 4,700 r/min and, as for HR1 track rollers, no thermal reference speed is published the 16 mm bore takes the mounting pin or shaft; across the 13.8 mm contact width the dynamic rating works out to 0.54 kN per millimetre of rolling-element complement mass is 57 g, or 0.13 g per mm² of the 32×13.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 16 mm pin bore the 13.8 mm width and 7.5 kN C rating suit high-cycle industrial machinery rather than instrument duty Choose RNA22 over RSTO where the environment carries abrasives: the 2RSR lips protect the needle complement but cannot be inspected or replaced without scrapping the unit Reading RNA22..2RSR: flangeless yoke roller, sealed for life on both sides, no inner ring; the 13.8 mm width includes the seal recesses The sealed 2RSR execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 32 mm track diameter and 7.5 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 16 mm seat, and in glass and ceramic line conveyors the 57 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 13.8 mm width and the published 8.3 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2201-2RSR?",
        "a": "The RNA2201-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 32 mm outside diameter, 16 mm bore and 13.8 mm width, envelope 16×32×13.8 mm. Mass is 57 g."
      },
      {
        "q": "What does the RNA2201-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2201-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×32×13.8 mm and the catalogue ratings are C 7.5 kN, C0 8.3 kN, Cur 1.29 kN."
      },
      {
        "q": "What is the load capacity of the RNA2201-2RSR?",
        "a": "The basic dynamic load rating C is 7.5 kN and the basic static load rating C0 is 8.3 kN; the fatigue load limit Cur is 1.29 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2201-2RSR?",
        "a": "HR1 lists a limiting speed of 4,700 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2201-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The 16 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2201",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2201-2RSR",
      "RNA2201-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2202-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2202-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 35,
    "B_mm": 13.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.6,
    "static_load_kN": 9.9,
    "fatigue_load_limit_kN": 1.39,
    "limiting_speed_rpm": 3400,
    "max_rpm": 3400,
    "weight_g": 60,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×35×13.8 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 13.8 mm width sets the contact width on the mating track the catalogue lists C 7.6 kN and C0 9.9 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.77 reflects a rolling-element pack sized for heavy static track loading, and the 7.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.39 kN at 20 mm bore, equivalent to 0.38 kN of dynamic rating per millimetre — the limiting speed is 3,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 13.8 mm contact width the dynamic rating works out to 0.55 kN per millimetre of rolling-element complement mass is 60 g, or 0.12 g per mm² of the 35×13.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty C 7.6 kN, C0 9.9 kN and Cur 1.39 kN are the track-load ratings; the sealed lips reduce the limiting speed to 3,400 r/min The sealed pack is greased for life — additional lubrication is neither possible nor required, and the roller suits dirty positions with no maintenance access The 2RSR suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 35 mm outer ring. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 35 mm track diameter and 7.6 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 20 mm seat, and in glass and ceramic line conveyors the 60 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 13.8 mm width and the published 9.9 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2202-2RSR?",
        "a": "The RNA2202-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 35 mm outside diameter, 20 mm bore and 13.8 mm width, envelope 20×35×13.8 mm. Mass is 60 g."
      },
      {
        "q": "What does the RNA2202-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2202-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×35×13.8 mm and the catalogue ratings are C 7.6 kN, C0 9.9 kN, Cur 1.39 kN."
      },
      {
        "q": "What is the load capacity of the RNA2202-2RSR?",
        "a": "The basic dynamic load rating C is 7.6 kN and the basic static load rating C0 is 9.9 kN; the fatigue load limit Cur is 1.39 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2202-2RSR?",
        "a": "HR1 lists a limiting speed of 3,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2202-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The 20 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2202",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2202-2RSR",
      "RNA2202-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2203-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2203-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 22,
    "D_mm": 40,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.9,
    "static_load_kN": 14.2,
    "fatigue_load_limit_kN": 1.87,
    "limiting_speed_rpm": 3000,
    "max_rpm": 3000,
    "weight_g": 94,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 22×40×15.8 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 22 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 9.9 kN and C0 14.2 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.70 reflects a rolling-element pack sized for heavy static track loading, and the 9.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.87 kN at 22 mm bore, equivalent to 0.45 kN of dynamic rating per millimetre — the limiting speed is 3,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 22 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 0.63 kN per millimetre of rolling-element complement mass is 94 g, or 0.15 g per mm² of the 40×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 22 mm pin bore this size balances the 40 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The 40 mm crowned-profile thick-walled outer ring runs on the track; at 22 mm the pin seat must still be hardened to 58–64 HRC despite the sealed execution RNA22 is the sealed yoke-type track roller without inner ring: 2RSR contact seals on both sides retain the factory grease and exclude dust, and the needles run on a hardened pin Reading the suffix: 2RSR is the FAG/INA code for rubbing lip seals at both faces, making the 22 mm-bore unit greased for life. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 40 mm track diameter and 9.9 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 22 mm seat, and in glass and ceramic line conveyors the 94 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 15.8 mm width and the published 14.2 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 40 mm outer ring does.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 40 mm outer ring does.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2203-2RSR?",
        "a": "The RNA2203-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 40 mm outside diameter, 22 mm bore and 15.8 mm width, envelope 22×40×15.8 mm. Mass is 94 g."
      },
      {
        "q": "What does the RNA2203-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2203-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 22×40×15.8 mm and the catalogue ratings are C 9.9 kN, C0 14.2 kN, Cur 1.87 kN."
      },
      {
        "q": "What is the load capacity of the RNA2203-2RSR?",
        "a": "The basic dynamic load rating C is 9.9 kN and the basic static load rating C0 is 14.2 kN; the fatigue load limit Cur is 1.87 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2203-2RSR?",
        "a": "HR1 lists a limiting speed of 3,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2203-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The 22 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2203",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2203-2RSR",
      "RNA2203-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2204-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2204-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 47,
    "B_mm": 17.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14,
    "static_load_kN": 19.3,
    "fatigue_load_limit_kN": 2.7,
    "limiting_speed_rpm": 2300,
    "max_rpm": 2300,
    "weight_g": 152,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×47×17.8 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 17.8 mm width sets the contact width on the mating track the catalogue lists C 14 kN and C0 19.3 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.7 kN at 25 mm bore, equivalent to 0.56 kN of dynamic rating per millimetre — the limiting speed is 2,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 17.8 mm contact width the dynamic rating works out to 0.79 kN per millimetre of rolling-element complement mass is 152 g, or 0.18 g per mm² of the 47×17.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 25 mm pin bore the 17.8 mm width and 14 kN C rating suit high-cycle industrial machinery rather than instrument duty C 14 kN, C0 19.3 kN and Cur 2.7 kN are the track-load ratings; the sealed lips reduce the limiting speed to 2,300 r/min RNA22 is the sealed yoke-type track roller without inner ring: 2RSR contact seals on both sides retain the factory grease and exclude dust, and the needles run on a hardened pin With 2RSR seals the 152 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 47 mm track diameter and 14 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 25 mm seat, and in glass and ceramic line conveyors the 152 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 17.8 mm width and the published 19.3 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2204-2RSR?",
        "a": "The RNA2204-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 47 mm outside diameter, 25 mm bore and 17.8 mm width, envelope 25×47×17.8 mm. Mass is 152 g."
      },
      {
        "q": "What does the RNA2204-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2204-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×47×17.8 mm and the catalogue ratings are C 14 kN, C0 19.3 kN, Cur 2.7 kN."
      },
      {
        "q": "What is the load capacity of the RNA2204-2RSR?",
        "a": "The basic dynamic load rating C is 14 kN and the basic static load rating C0 is 19.3 kN; the fatigue load limit Cur is 2.7 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2204-2RSR?",
        "a": "HR1 lists a limiting speed of 2,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2204-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The 25 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2204",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2204-2RSR",
      "RNA2204-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2205-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2205-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 52,
    "B_mm": 17.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.4,
    "static_load_kN": 21.1,
    "fatigue_load_limit_kN": 2.95,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 179,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×52×17.8 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 17.8 mm width sets the contact width on the mating track the catalogue lists C 14.4 kN and C0 21.1 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.95 kN at 30 mm bore, equivalent to 0.48 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 17.8 mm contact width the dynamic rating works out to 0.81 kN per millimetre of rolling-element complement mass is 179 g, or 0.19 g per mm² of the 52×17.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The 52 mm crowned-profile thick-walled outer ring runs on the track; at 30 mm the pin seat must still be hardened to 58–64 HRC despite the sealed execution C 14.4 kN, C0 21.1 kN and Cur 2.95 kN are the track-load ratings; the sealed lips reduce the limiting speed to 1,800 r/min 2RSR means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 1,800 r/min. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 52 mm track diameter and 14.4 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 30 mm seat, and in glass and ceramic line conveyors the 179 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 17.8 mm width and the published 21.1 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 52 mm outer ring does.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 52 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2205-2RSR?",
        "a": "The RNA2205-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 52 mm outside diameter, 30 mm bore and 17.8 mm width, envelope 30×52×17.8 mm. Mass is 179 g."
      },
      {
        "q": "What does the RNA2205-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2205-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×52×17.8 mm and the catalogue ratings are C 14.4 kN, C0 21.1 kN, Cur 2.95 kN."
      },
      {
        "q": "What is the load capacity of the RNA2205-2RSR?",
        "a": "The basic dynamic load rating C is 14.4 kN and the basic static load rating C0 is 21.1 kN; the fatigue load limit Cur is 2.95 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2205-2RSR?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2205-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The 30 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2205",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2205-2RSR",
      "RNA2205-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2206-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2206-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 62,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 17,
    "static_load_kN": 26.5,
    "fatigue_load_limit_kN": 3.6,
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400,
    "weight_g": 284,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×62×19.8 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 17 kN and C0 26.5 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.64 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.6 kN at 35 mm bore, equivalent to 0.49 kN of dynamic rating per millimetre — the limiting speed is 1,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 0.86 kN per millimetre of rolling-element complement mass is 284 g, or 0.23 g per mm² of the 62×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 35 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 19.8 mm width as a standard mounting space Choose RNA22 over RSTO where the environment carries abrasives: the 2RSR lips protect the needle complement but cannot be inspected or replaced without scrapping the unit The sealed 2RSR execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 62 mm track diameter and 17 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 35 mm seat, and in glass and ceramic line conveyors the 284 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 19.8 mm width and the published 26.5 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2206-2RSR?",
        "a": "The RNA2206-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 62 mm outside diameter, 35 mm bore and 19.8 mm width, envelope 35×62×19.8 mm. Mass is 284 g."
      },
      {
        "q": "What does the RNA2206-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2206-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 35×62×19.8 mm and the catalogue ratings are C 17 kN, C0 26.5 kN, Cur 3.6 kN."
      },
      {
        "q": "What is the load capacity of the RNA2206-2RSR?",
        "a": "The basic dynamic load rating C is 17 kN and the basic static load rating C0 is 26.5 kN; the fatigue load limit Cur is 3.6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2206-2RSR?",
        "a": "HR1 lists a limiting speed of 1,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2206-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The 35 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2206",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2206-2RSR",
      "RNA2206-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2207-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2207-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 42,
    "D_mm": 72,
    "B_mm": 22.7,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 21.5,
    "static_load_kN": 36.5,
    "fatigue_load_limit_kN": 5.3,
    "limiting_speed_rpm": 1100,
    "max_rpm": 1100,
    "weight_g": 432,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 42×72×22.7 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 42 mm bore — and the 22.7 mm width sets the contact width on the mating track the catalogue lists C 21.5 kN and C0 36.5 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.3 kN at 42 mm bore, equivalent to 0.51 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 42 mm bore takes the mounting pin or shaft; across the 22.7 mm contact width the dynamic rating works out to 0.95 kN per millimetre of rolling-element complement mass is 432 g, or 0.26 g per mm² of the 72×22.7 mm track envelope — inertia that the drive must accelerate on every index of the cam 42 mm pin bore marks the medium range: mounting forces and fits become critical, and the 432 g mass calls for proper induction or press tooling rather than hand fitting C 21.5 kN, C0 36.5 kN and Cur 5.3 kN are the track-load ratings; the sealed lips reduce the limiting speed to 1,100 r/min The 72 mm crowned-profile thick-walled outer ring runs on the track; at 42 mm the pin seat must still be hardened to 58–64 HRC despite the sealed execution The 2RSR suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 72 mm outer ring. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 72 mm track diameter and 21.5 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 42 mm seat, and in glass and ceramic line conveyors the 432 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 22.7 mm width and the published 36.5 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2207-2RSR?",
        "a": "The RNA2207-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 72 mm outside diameter, 42 mm bore and 22.7 mm width, envelope 42×72×22.7 mm. Mass is 432 g."
      },
      {
        "q": "What does the RNA2207-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2207-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 42×72×22.7 mm and the catalogue ratings are C 21.5 kN, C0 36.5 kN, Cur 5.3 kN."
      },
      {
        "q": "What is the load capacity of the RNA2207-2RSR?",
        "a": "The basic dynamic load rating C is 21.5 kN and the basic static load rating C0 is 36.5 kN; the fatigue load limit Cur is 5.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2207-2RSR?",
        "a": "HR1 lists a limiting speed of 1,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2207-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The 42 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2207",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2207-2RSR",
      "RNA2207-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "RNA2208-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "RNA2208-2RSR",
    "series": "rna22-series",
    "type": "support_roller",
    "d_mm": 48,
    "D_mm": 80,
    "B_mm": 22.7,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 26,
    "static_load_kN": 41.5,
    "fatigue_load_limit_kN": 5.4,
    "limiting_speed_rpm": 850,
    "max_rpm": 850,
    "weight_g": 530,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 48×80×22.7 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 48 mm bore — and the 22.7 mm width sets the contact width on the mating track the catalogue lists C 26 kN and C0 41.5 kN for the RNA22 sealed yoke-type track roller without inner ring; the C/C0 ratio of 0.63 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.4 kN at 48 mm bore, equivalent to 0.54 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 48 mm bore takes the mounting pin or shaft; across the 22.7 mm contact width the dynamic rating works out to 1.15 kN per millimetre of rolling-element complement mass is 530 g, or 0.29 g per mm² of the 80×22.7 mm track envelope — inertia that the drive must accelerate on every index of the cam the 48 mm pin bore places this bearing in the medium band, where the 80 mm envelope already carries ratings in the tens of kilonewtons Choose RNA22 over RSTO where the environment carries abrasives: the 2RSR lips protect the needle complement but cannot be inspected or replaced without scrapping the unit Reading RNA22..2RSR: flangeless yoke roller, sealed for life on both sides, no inner ring; the 22.7 mm width includes the seal recesses Reading the suffix: 2RSR is the FAG/INA code for rubbing lip seals at both faces, making the 48 mm-bore unit greased for life. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 80 mm track diameter and 26 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 48 mm seat, and in glass and ceramic line conveyors the 530 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 22.7 mm width and the published 41.5 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the RNA2208-2RSR?",
        "a": "The RNA2208-2RSR is a RNA22 sealed yoke-type track roller without inner ring with 80 mm outside diameter, 48 mm bore and 22.7 mm width, envelope 48×80×22.7 mm. Mass is 530 g."
      },
      {
        "q": "What does the RNA2208-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "RNA2208-2RSR identifies this RNA22 sealed yoke-type track roller without inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 48×80×22.7 mm and the catalogue ratings are C 26 kN, C0 41.5 kN, Cur 5.4 kN."
      },
      {
        "q": "What is the load capacity of the RNA2208-2RSR?",
        "a": "The basic dynamic load rating C is 26 kN and the basic static load rating C0 is 41.5 kN; the fatigue load limit Cur is 5.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the RNA2208-2RSR?",
        "a": "HR1 lists a limiting speed of 850 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the RNA2208-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The 48 mm pin must be hardened to 58–64 HRC and ground like a raceway; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "RNA2208",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "RNA2208-2RSR",
      "RNA2208-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA22-6-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA22/6-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.9,
    "static_load_kN": 3.7,
    "fatigue_load_limit_kN": 0.495,
    "limiting_speed_rpm": 9000,
    "max_rpm": 9000,
    "weight_g": 22,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 6×19×11.8 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 3.9 kN and C0 3.7 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 1.05 reflects a rolling-element pack sized for heavy static track loading, and the 6.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.495 kN at 6 mm bore, equivalent to 0.65 kN of dynamic rating per millimetre — the limiting speed is 9,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.33 kN per millimetre of rolling-element complement mass is 22 g, or 0.10 g per mm² of the 19×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm pin bore and only 22 g: the smallest sizes demand accurate shaft geometry, because the 6.5 mm section leaves no tolerance for a soft or tapered seat NA22 is the sealed yoke-type track roller with inner ring: 2RSR contact seals on both sides and a 6 mm bore for an ordinary mounting pin Typical positions are conveyor diverts, packaging cams and textile machines where 22 g maintenance-free rollers replace plain-bushed followers 2RSR means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 9,000 r/min. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 19 mm track diameter and 3.9 kN dynamic rating match the duty. In robotic arm linear axes the unit fits a compact 6 mm seat, and in agricultural and textile cam followers the 22 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 11.8 mm width and the published 3.7 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA22/6-2RSR?",
        "a": "The NA22/6-2RSR is a NA22 sealed yoke-type track roller with inner ring with 19 mm outside diameter, 6 mm bore and 11.8 mm width, envelope 6×19×11.8 mm. Mass is 22 g."
      },
      {
        "q": "What does the NA22/6-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA22/6-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×19×11.8 mm and the catalogue ratings are C 3.9 kN, C0 3.7 kN, Cur 0.495 kN."
      },
      {
        "q": "What is the load capacity of the NA22/6-2RSR?",
        "a": "The basic dynamic load rating C is 3.9 kN and the basic static load rating C0 is 3.7 kN; the fatigue load limit Cur is 0.495 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA22/6-2RSR?",
        "a": "HR1 lists a limiting speed of 9,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA22/6-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The inner ring lets the 6 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA22",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA22-6-2RSR",
      "NA22/6-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA22-8-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA22/8-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 11.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 4.8,
    "static_load_kN": 4.3,
    "fatigue_load_limit_kN": 0.65,
    "limiting_speed_rpm": 7000,
    "max_rpm": 7000,
    "weight_g": 34,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 8×24×11.8 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm bore — and the 11.8 mm width sets the contact width on the mating track the catalogue lists C 4.8 kN and C0 4.3 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 1.12 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.65 kN at 8 mm bore, equivalent to 0.60 kN of dynamic rating per millimetre — the limiting speed is 7,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm bore takes the mounting pin or shaft; across the 11.8 mm contact width the dynamic rating works out to 0.41 kN per millimetre of rolling-element complement mass is 34 g, or 0.12 g per mm² of the 24×11.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 8 mm pin bore sits in the miniature band; at 11.8 mm wide the NA22/8-2RSR is built into compact cam drives, indexing pawls and light linkages The thick-walled 24 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals With 2RSR seals the 34 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 24 mm track diameter and 4.8 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 8 mm seat, and in automatic assembly machine carriages the 34 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 11.8 mm width and the published 4.3 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 24 mm outer ring does.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 24 mm outer ring does.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA22/8-2RSR?",
        "a": "The NA22/8-2RSR is a NA22 sealed yoke-type track roller with inner ring with 24 mm outside diameter, 8 mm bore and 11.8 mm width, envelope 8×24×11.8 mm. Mass is 34 g."
      },
      {
        "q": "What does the NA22/8-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA22/8-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×24×11.8 mm and the catalogue ratings are C 4.8 kN, C0 4.3 kN, Cur 0.65 kN."
      },
      {
        "q": "What is the load capacity of the NA22/8-2RSR?",
        "a": "The basic dynamic load rating C is 4.8 kN and the basic static load rating C0 is 4.3 kN; the fatigue load limit Cur is 0.65 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA22/8-2RSR?",
        "a": "HR1 lists a limiting speed of 7,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA22/8-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The inner ring lets the 8 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA22",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA22-8-2RSR",
      "NA22/8-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2200-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2200-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 13.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7,
    "static_load_kN": 6.9,
    "fatigue_load_limit_kN": 1.12,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 60,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×30×13.8 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 13.8 mm width sets the contact width on the mating track the catalogue lists C 7 kN and C0 6.9 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 1.01 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.12 kN at 10 mm bore, equivalent to 0.70 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 13.8 mm contact width the dynamic rating works out to 0.51 kN per millimetre of rolling-element complement mass is 60 g, or 0.14 g per mm² of the 30×13.8 mm track envelope — inertia that the drive must accelerate on every index of the cam 10 mm pin bore and only 60 g: the smallest sizes demand accurate shaft geometry, because the 10.0 mm section leaves no tolerance for a soft or tapered seat C 7 kN and C0 6.9 kN cover the supported-track bending case; the contact seals set the limiting speed at 5,500 r/min Reading NA22..2RSR: sealed flangeless yoke roller with inner ring; the 13.8 mm-wide unit needs lateral location from the adjacent structure With 2RSR seals the 60 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 30 mm track diameter and 7 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 10 mm seat, and in packaging machine timing mechanisms the 60 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 13.8 mm width and the published 6.9 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2200-2RSR?",
        "a": "The NA2200-2RSR is a NA22 sealed yoke-type track roller with inner ring with 30 mm outside diameter, 10 mm bore and 13.8 mm width, envelope 10×30×13.8 mm. Mass is 60 g."
      },
      {
        "q": "What does the NA2200-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2200-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×30×13.8 mm and the catalogue ratings are C 7 kN, C0 6.9 kN, Cur 1.12 kN."
      },
      {
        "q": "What is the load capacity of the NA2200-2RSR?",
        "a": "The basic dynamic load rating C is 7 kN and the basic static load rating C0 is 6.9 kN; the fatigue load limit Cur is 1.12 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2200-2RSR?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2200-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The inner ring lets the 10 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2200",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2200-2RSR",
      "NA2200-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2201-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2201-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 13.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.5,
    "static_load_kN": 8.3,
    "fatigue_load_limit_kN": 1.29,
    "limiting_speed_rpm": 4700,
    "max_rpm": 4700,
    "weight_g": 67,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×32×13.8 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 13.8 mm width sets the contact width on the mating track the catalogue lists C 7.5 kN and C0 8.3 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.90 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.29 kN at 12 mm bore, equivalent to 0.63 kN of dynamic rating per millimetre — the limiting speed is 4,700 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 13.8 mm contact width the dynamic rating works out to 0.54 kN per millimetre of rolling-element complement mass is 67 g, or 0.15 g per mm² of the 32×13.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm pin bore this is one of the smallest HR1 executions — chosen where a 32 mm envelope must carry line-contact loads that no miniature ball bearing could take C 7.5 kN and C0 8.3 kN cover the supported-track bending case; the contact seals set the limiting speed at 4,700 r/min NA22 is the sealed yoke-type track roller with inner ring: 2RSR contact seals on both sides and a 12 mm bore for an ordinary mounting pin 2RSR means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 4,700 r/min. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 32 mm track diameter and 7.5 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 12 mm seat, and in packaging machine timing mechanisms the 67 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 13.8 mm width and the published 8.3 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 32 mm outer ring does. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 32 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2201-2RSR?",
        "a": "The NA2201-2RSR is a NA22 sealed yoke-type track roller with inner ring with 32 mm outside diameter, 12 mm bore and 13.8 mm width, envelope 12×32×13.8 mm. Mass is 67 g."
      },
      {
        "q": "What does the NA2201-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2201-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×13.8 mm and the catalogue ratings are C 7.5 kN, C0 8.3 kN, Cur 1.29 kN."
      },
      {
        "q": "What is the load capacity of the NA2201-2RSR?",
        "a": "The basic dynamic load rating C is 7.5 kN and the basic static load rating C0 is 8.3 kN; the fatigue load limit Cur is 1.29 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2201-2RSR?",
        "a": "HR1 lists a limiting speed of 4,700 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2201-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The inner ring lets the 12 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2201",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2201-2RSR",
      "NA2201-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2202-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2202-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 13.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.6,
    "static_load_kN": 9.9,
    "fatigue_load_limit_kN": 1.39,
    "limiting_speed_rpm": 3400,
    "max_rpm": 3400,
    "weight_g": 75,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×13.8 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 13.8 mm width sets the contact width on the mating track the catalogue lists C 7.6 kN and C0 9.9 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.77 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.39 kN at 15 mm bore, equivalent to 0.51 kN of dynamic rating per millimetre — the limiting speed is 3,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 13.8 mm contact width the dynamic rating works out to 0.55 kN per millimetre of rolling-element complement mass is 75 g, or 0.16 g per mm² of the 35×13.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 15 mm pin bore this size balances the 35 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range Reading NA22..2RSR: sealed flangeless yoke roller with inner ring; the 13.8 mm-wide unit needs lateral location from the adjacent structure The inner ring means no hard journal is required — machine the pin to normal tolerance, fit the sealed roller, and forget relubrication for the design life The sealed 2RSR execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 35 mm track diameter and 7.6 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 15 mm seat, and in packaging machine timing mechanisms the 75 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 13.8 mm width and the published 9.9 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2202-2RSR?",
        "a": "The NA2202-2RSR is a NA22 sealed yoke-type track roller with inner ring with 35 mm outside diameter, 15 mm bore and 13.8 mm width, envelope 15×35×13.8 mm. Mass is 75 g."
      },
      {
        "q": "What does the NA2202-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2202-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×35×13.8 mm and the catalogue ratings are C 7.6 kN, C0 9.9 kN, Cur 1.39 kN."
      },
      {
        "q": "What is the load capacity of the NA2202-2RSR?",
        "a": "The basic dynamic load rating C is 7.6 kN and the basic static load rating C0 is 9.9 kN; the fatigue load limit Cur is 1.39 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2202-2RSR?",
        "a": "HR1 lists a limiting speed of 3,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2202-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2202",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2202-2RSR",
      "NA2202-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2203-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2203-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 15.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.9,
    "static_load_kN": 14.2,
    "fatigue_load_limit_kN": 1.87,
    "limiting_speed_rpm": 3000,
    "max_rpm": 3000,
    "weight_g": 112,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×15.8 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 15.8 mm width sets the contact width on the mating track the catalogue lists C 9.9 kN and C0 14.2 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.70 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.87 kN at 17 mm bore, equivalent to 0.58 kN of dynamic rating per millimetre — the limiting speed is 3,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 15.8 mm contact width the dynamic rating works out to 0.63 kN per millimetre of rolling-element complement mass is 112 g, or 0.18 g per mm² of the 40×15.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 17 mm pin bore the 15.8 mm width and 9.9 kN C rating suit high-cycle industrial machinery rather than instrument duty Typical positions are conveyor diverts, packaging cams and textile machines where 112 g maintenance-free rollers replace plain-bushed followers The 2RSR suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 40 mm outer ring. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 40 mm track diameter and 9.9 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 17 mm seat, and in packaging machine timing mechanisms the 112 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 15.8 mm width and the published 14.2 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 40 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2203-2RSR?",
        "a": "The NA2203-2RSR is a NA22 sealed yoke-type track roller with inner ring with 40 mm outside diameter, 17 mm bore and 15.8 mm width, envelope 17×40×15.8 mm. Mass is 112 g."
      },
      {
        "q": "What does the NA2203-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2203-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×40×15.8 mm and the catalogue ratings are C 9.9 kN, C0 14.2 kN, Cur 1.87 kN."
      },
      {
        "q": "What is the load capacity of the NA2203-2RSR?",
        "a": "The basic dynamic load rating C is 9.9 kN and the basic static load rating C0 is 14.2 kN; the fatigue load limit Cur is 1.87 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2203-2RSR?",
        "a": "HR1 lists a limiting speed of 3,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2203-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2203",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2203-2RSR",
      "NA2203-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2204-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2204-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 17.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14,
    "static_load_kN": 19.3,
    "fatigue_load_limit_kN": 2.7,
    "limiting_speed_rpm": 2300,
    "max_rpm": 2300,
    "weight_g": 177,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×17.8 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 17.8 mm width sets the contact width on the mating track the catalogue lists C 14 kN and C0 19.3 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.7 kN at 20 mm bore, equivalent to 0.70 kN of dynamic rating per millimetre — the limiting speed is 2,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 17.8 mm contact width the dynamic rating works out to 0.79 kN per millimetre of rolling-element complement mass is 177 g, or 0.21 g per mm² of the 47×17.8 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty C 14 kN and C0 19.3 kN cover the supported-track bending case; the contact seals set the limiting speed at 2,300 r/min The thick-walled 47 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals Reading the suffix: 2RSR is the FAG/INA code for rubbing lip seals at both faces, making the 20 mm-bore unit greased for life. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 47 mm track diameter and 14 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 20 mm seat, and in packaging machine timing mechanisms the 177 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 17.8 mm width and the published 19.3 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2204-2RSR?",
        "a": "The NA2204-2RSR is a NA22 sealed yoke-type track roller with inner ring with 47 mm outside diameter, 20 mm bore and 17.8 mm width, envelope 20×47×17.8 mm. Mass is 177 g."
      },
      {
        "q": "What does the NA2204-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2204-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×17.8 mm and the catalogue ratings are C 14 kN, C0 19.3 kN, Cur 2.7 kN."
      },
      {
        "q": "What is the load capacity of the NA2204-2RSR?",
        "a": "The basic dynamic load rating C is 14 kN and the basic static load rating C0 is 19.3 kN; the fatigue load limit Cur is 2.7 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2204-2RSR?",
        "a": "HR1 lists a limiting speed of 2,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2204-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2204",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2204-2RSR",
      "NA2204-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2205-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2205-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 17.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.4,
    "static_load_kN": 21.1,
    "fatigue_load_limit_kN": 2.95,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 209,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×17.8 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 17.8 mm width sets the contact width on the mating track the catalogue lists C 14.4 kN and C0 21.1 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.95 kN at 25 mm bore, equivalent to 0.58 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 17.8 mm contact width the dynamic rating works out to 0.81 kN per millimetre of rolling-element complement mass is 209 g, or 0.23 g per mm² of the 52×17.8 mm track envelope — inertia that the drive must accelerate on every index of the cam at 25 mm pin bore this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range C 14.4 kN and C0 21.1 kN cover the supported-track bending case; the contact seals set the limiting speed at 1,800 r/min Seal drag is part of the torque budget at small sizes, and running above the limiting speed overheats the lips and destroys the grease fill rather than merely shortening life With 2RSR seals the 209 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 52 mm track diameter and 14.4 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 25 mm seat, and in packaging machine timing mechanisms the 209 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 17.8 mm width and the published 21.1 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2205-2RSR?",
        "a": "The NA2205-2RSR is a NA22 sealed yoke-type track roller with inner ring with 52 mm outside diameter, 25 mm bore and 17.8 mm width, envelope 25×52×17.8 mm. Mass is 209 g."
      },
      {
        "q": "What does the NA2205-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2205-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×52×17.8 mm and the catalogue ratings are C 14.4 kN, C0 21.1 kN, Cur 2.95 kN."
      },
      {
        "q": "What is the load capacity of the NA2205-2RSR?",
        "a": "The basic dynamic load rating C is 14.4 kN and the basic static load rating C0 is 21.1 kN; the fatigue load limit Cur is 2.95 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2205-2RSR?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2205-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2205",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2205-2RSR",
      "NA2205-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2206-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2206-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 19.8,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 17,
    "static_load_kN": 26.5,
    "fatigue_load_limit_kN": 3.6,
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400,
    "weight_g": 324,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×19.8 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 19.8 mm width sets the contact width on the mating track the catalogue lists C 17 kN and C0 26.5 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.64 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.6 kN at 30 mm bore, equivalent to 0.57 kN of dynamic rating per millimetre — the limiting speed is 1,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 19.8 mm contact width the dynamic rating works out to 0.86 kN per millimetre of rolling-element complement mass is 324 g, or 0.26 g per mm² of the 62×19.8 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 30 mm pin bore the 19.8 mm width and 17 kN C rating suit high-cycle industrial machinery rather than instrument duty C 17 kN and C0 26.5 kN cover the supported-track bending case; the contact seals set the limiting speed at 1,400 r/min The inner ring means no hard journal is required — machine the pin to normal tolerance, fit the sealed roller, and forget relubrication for the design life 2RSR means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 1,400 r/min. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 62 mm track diameter and 17 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 30 mm seat, and in packaging machine timing mechanisms the 324 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 19.8 mm width and the published 26.5 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2206-2RSR?",
        "a": "The NA2206-2RSR is a NA22 sealed yoke-type track roller with inner ring with 62 mm outside diameter, 30 mm bore and 19.8 mm width, envelope 30×62×19.8 mm. Mass is 324 g."
      },
      {
        "q": "What does the NA2206-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2206-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×62×19.8 mm and the catalogue ratings are C 17 kN, C0 26.5 kN, Cur 3.6 kN."
      },
      {
        "q": "What is the load capacity of the NA2206-2RSR?",
        "a": "The basic dynamic load rating C is 17 kN and the basic static load rating C0 is 26.5 kN; the fatigue load limit Cur is 3.6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2206-2RSR?",
        "a": "HR1 lists a limiting speed of 1,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2206-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2206",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2206-2RSR",
      "NA2206-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2207-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2207-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 22.7,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 21.5,
    "static_load_kN": 36.5,
    "fatigue_load_limit_kN": 5.3,
    "limiting_speed_rpm": 1100,
    "max_rpm": 1100,
    "weight_g": 505,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×72×22.7 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 22.7 mm width sets the contact width on the mating track the catalogue lists C 21.5 kN and C0 36.5 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.3 kN at 35 mm bore, equivalent to 0.61 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 22.7 mm contact width the dynamic rating works out to 0.95 kN per millimetre of rolling-element complement mass is 505 g, or 0.31 g per mm² of the 72×22.7 mm track envelope — inertia that the drive must accelerate on every index of the cam the 35 mm pin bore places this bearing in the medium band, where the 72 mm envelope already carries ratings in the tens of kilonewtons Reading NA22..2RSR: sealed flangeless yoke roller with inner ring; the 22.7 mm-wide unit needs lateral location from the adjacent structure The thick-walled 72 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals The sealed 2RSR execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 72 mm track diameter and 21.5 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 35 mm seat, and in packaging machine timing mechanisms the 505 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 22.7 mm width and the published 36.5 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2207-2RSR?",
        "a": "The NA2207-2RSR is a NA22 sealed yoke-type track roller with inner ring with 72 mm outside diameter, 35 mm bore and 22.7 mm width, envelope 35×72×22.7 mm. Mass is 505 g."
      },
      {
        "q": "What does the NA2207-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2207-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 35×72×22.7 mm and the catalogue ratings are C 21.5 kN, C0 36.5 kN, Cur 5.3 kN."
      },
      {
        "q": "What is the load capacity of the NA2207-2RSR?",
        "a": "The basic dynamic load rating C is 21.5 kN and the basic static load rating C0 is 36.5 kN; the fatigue load limit Cur is 5.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2207-2RSR?",
        "a": "HR1 lists a limiting speed of 1,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2207-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2207",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2207-2RSR",
      "NA2207-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2208-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2208-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 22.7,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 26,
    "static_load_kN": 41.5,
    "fatigue_load_limit_kN": 5.4,
    "limiting_speed_rpm": 850,
    "max_rpm": 850,
    "weight_g": 628,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×80×22.7 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 22.7 mm width sets the contact width on the mating track the catalogue lists C 26 kN and C0 41.5 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.63 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.4 kN at 40 mm bore, equivalent to 0.65 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 22.7 mm contact width the dynamic rating works out to 1.15 kN per millimetre of rolling-element complement mass is 628 g, or 0.35 g per mm² of the 80×22.7 mm track envelope — inertia that the drive must accelerate on every index of the cam at 40 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 22.7 mm width as a standard mounting space The inner ring means no hard journal is required — machine the pin to normal tolerance, fit the sealed roller, and forget relubrication for the design life The thick-walled 80 mm outer ring with crowned profile runs on flat or slightly imperfect tracks, greased for life behind the two side seals The 2RSR suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 80 mm outer ring. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 80 mm track diameter and 26 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 40 mm seat, and in packaging machine timing mechanisms the 628 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 22.7 mm width and the published 41.5 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 80 mm outer ring does. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 80 mm outer ring does.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2208-2RSR?",
        "a": "The NA2208-2RSR is a NA22 sealed yoke-type track roller with inner ring with 80 mm outside diameter, 40 mm bore and 22.7 mm width, envelope 40×80×22.7 mm. Mass is 628 g."
      },
      {
        "q": "What does the NA2208-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2208-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 40×80×22.7 mm and the catalogue ratings are C 26 kN, C0 41.5 kN, Cur 5.4 kN."
      },
      {
        "q": "What is the load capacity of the NA2208-2RSR?",
        "a": "The basic dynamic load rating C is 26 kN and the basic static load rating C0 is 41.5 kN; the fatigue load limit Cur is 5.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2208-2RSR?",
        "a": "HR1 lists a limiting speed of 850 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2208-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2208",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2208-2RSR",
      "NA2208-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA2210-2RSR",
    "brand": "FAG",
    "manufacturer_designation": "NA2210-2RSR",
    "series": "na22-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 22.7,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 26,
    "static_load_kN": 44,
    "fatigue_load_limit_kN": 5.7,
    "limiting_speed_rpm": 650,
    "max_rpm": 650,
    "weight_g": 690,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×90×22.7 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 22.7 mm width sets the contact width on the mating track the catalogue lists C 26 kN and C0 44 kN for the NA22 sealed yoke-type track roller with inner ring; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.7 kN at 50 mm bore, equivalent to 0.52 kN of dynamic rating per millimetre — the limiting speed is 650 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 22.7 mm contact width the dynamic rating works out to 1.15 kN per millimetre of rolling-element complement mass is 690 g, or 0.34 g per mm² of the 90×22.7 mm track envelope — inertia that the drive must accelerate on every index of the cam at 50 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 22.7 mm width as a standard mounting space The inner ring means no hard journal is required — machine the pin to normal tolerance, fit the sealed roller, and forget relubrication for the design life Seal drag is part of the torque budget at small sizes, and running above the limiting speed overheats the lips and destroys the grease fill rather than merely shortening life With 2RSR seals the 690 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 90 mm track diameter and 26 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 50 mm seat, and in cam drives and indexing tables the 690 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 22.7 mm width and the published 44 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA2210-2RSR?",
        "a": "The NA2210-2RSR is a NA22 sealed yoke-type track roller with inner ring with 90 mm outside diameter, 50 mm bore and 22.7 mm width, envelope 50×90×22.7 mm. Mass is 690 g."
      },
      {
        "q": "What does the NA2210-2RSR designation mean in the FAG/INA HR1 catalogue?",
        "a": "NA2210-2RSR identifies this NA22 sealed yoke-type track roller with inner ring in the Schaeffler HR1 rolling bearings catalogue. The envelope is 50×90×22.7 mm and the catalogue ratings are C 26 kN, C0 44 kN, Cur 5.7 kN."
      },
      {
        "q": "What is the load capacity of the NA2210-2RSR?",
        "a": "The basic dynamic load rating C is 26 kN and the basic static load rating C0 is 44 kN; the fatigue load limit Cur is 5.7 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NA2210-2RSR?",
        "a": "HR1 lists a limiting speed of 650 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NA2210-2RSR?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA2210",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1449",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA2210-2RSR",
      "NA2210-2RSR"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR5",
    "brand": "FAG",
    "manufacturer_designation": "NATR5",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.15,
    "static_load_kN": 3.4,
    "fatigue_load_limit_kN": 0.46,
    "limiting_speed_rpm": 14000,
    "max_rpm": 14000,
    "weight_g": 14,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 5×16×12 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 5 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 3.15 kN and C0 3.4 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.93 reflects a rolling-element pack sized for heavy static track loading, and the 5.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.46 kN at 5 mm bore, equivalent to 0.63 kN of dynamic rating per millimetre — the limiting speed is 14,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 5 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.26 kN per millimetre of rolling-element complement mass is 14 g, or 0.07 g per mm² of the 16×12 mm track envelope — inertia that the drive must accelerate on every index of the cam the 5 mm pin bore sits in the miniature band; at 12 mm wide the NATR5 is built into compact cam drives, indexing pawls and light linkages Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the open execution is relubricated through the inner ring or pin The cage keeps the NATV at the higher limiting speed of 14,000 r/min for a track roller, with C 3.15 kN and C0 3.4 kN Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 16 mm track diameter and 3.15 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 5 mm seat, and in cam drives and indexing tables the 14 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 12 mm width and the published 3.4 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR5?",
        "a": "The NATR5 is a NATR yoke-type track roller with cage and axial guidance with 16 mm outside diameter, 5 mm bore and 12 mm width, envelope 5×16×12 mm. Mass is 14 g."
      },
      {
        "q": "What does the NATR5 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR5 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 5×16×12 mm and the catalogue ratings are C 3.15 kN, C0 3.4 kN, Cur 0.46 kN."
      },
      {
        "q": "What is the load capacity of the NATR5?",
        "a": "The basic dynamic load rating C is 3.15 kN and the basic static load rating C0 is 3.4 kN; the fatigue load limit Cur is 0.46 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR5?",
        "a": "HR1 lists a limiting speed of 14,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR5?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 16 mm outer surface tolerates only small angular error. The inner ring lets the 5 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR5-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR5",
      "NATR5"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR5-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR5-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.15,
    "static_load_kN": 3.4,
    "fatigue_load_limit_kN": 0.46,
    "limiting_speed_rpm": 14000,
    "max_rpm": 14000,
    "weight_g": 14,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 5×16×12 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 5 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 3.15 kN and C0 3.4 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.93 reflects a rolling-element pack sized for heavy static track loading, and the 5.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.46 kN at 5 mm bore, equivalent to 0.63 kN of dynamic rating per millimetre — the limiting speed is 14,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 5 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.26 kN per millimetre of rolling-element complement mass is 14 g, or 0.07 g per mm² of the 16×12 mm track envelope — inertia that the drive must accelerate on every index of the cam 5 mm pin bore and only 14 g: the smallest sizes demand accurate shaft geometry, because the 5.5 mm section leaves no tolerance for a soft or tapered seat At 5 mm bore and 14 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load Reading -PP: rubbing seals at each face of the 16 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 16 mm track diameter and 3.15 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 5 mm seat, and in glass and ceramic line conveyors the 14 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 12 mm width and the published 3.4 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 16 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR5-PP?",
        "a": "The NATR5-PP is a NATR yoke-type track roller with cage and axial guidance with 16 mm outside diameter, 5 mm bore and 12 mm width, envelope 5×16×12 mm. Mass is 14 g."
      },
      {
        "q": "What does the NATR5-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR5-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 5×16×12 mm and the catalogue ratings are C 3.15 kN, C0 3.4 kN, Cur 0.46 kN."
      },
      {
        "q": "What is the load capacity of the NATR5-PP?",
        "a": "The basic dynamic load rating C is 3.15 kN and the basic static load rating C0 is 3.4 kN; the fatigue load limit Cur is 0.46 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR5-PP?",
        "a": "HR1 lists a limiting speed of 14,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR5-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 16 mm outer surface tolerates only small angular error. The inner ring lets the 5 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR5",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR5-PP",
      "NATR5-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV5",
    "brand": "FAG",
    "manufacturer_designation": "NATV5",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 4.9,
    "static_load_kN": 6.7,
    "fatigue_load_limit_kN": 0.97,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 15,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 5×16×12 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 5 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 4.9 kN and C0 6.7 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 5.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.97 kN at 5 mm bore, equivalent to 0.98 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 5 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.41 kN per millimetre of rolling-element complement mass is 15 g, or 0.08 g per mm² of the 16×12 mm track envelope — inertia that the drive must accelerate on every index of the cam the 5 mm pin bore sits in the miniature band; at 12 mm wide the NATV5 is built into compact cam drives, indexing pawls and light linkages At 5 mm bore and 15 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 12 mm width covers most standard cam geometries Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 16 mm track diameter and 4.9 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 5 mm seat, and in linear rail and profile track guidance the 15 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 12 mm width and the published 6.7 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 16 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV5?",
        "a": "The NATV5 is a NATV full-complement yoke-type track roller with axial guidance with 16 mm outside diameter, 5 mm bore and 12 mm width, envelope 5×16×12 mm. Mass is 15 g."
      },
      {
        "q": "What does the NATV5 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV5 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 5×16×12 mm and the catalogue ratings are C 4.9 kN, C0 6.7 kN, Cur 0.97 kN."
      },
      {
        "q": "What is the load capacity of the NATV5?",
        "a": "The basic dynamic load rating C is 4.9 kN and the basic static load rating C0 is 6.7 kN; the fatigue load limit Cur is 0.97 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV5?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV5?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 16 mm outer surface tolerates only small angular error. The inner ring lets the 5 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV5-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV5",
      "NATV5"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV5-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV5-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 4.9,
    "static_load_kN": 6.7,
    "fatigue_load_limit_kN": 0.97,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 15,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 5×16×12 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 5 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 4.9 kN and C0 6.7 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 5.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.97 kN at 5 mm bore, equivalent to 0.98 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 5 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.41 kN per millimetre of rolling-element complement mass is 15 g, or 0.08 g per mm² of the 16×12 mm track envelope — inertia that the drive must accelerate on every index of the cam 5 mm pin bore and only 15 g: the smallest sizes demand accurate shaft geometry, because the 5.5 mm section leaves no tolerance for a soft or tapered seat NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 16 mm envelope for maximum C0 6.7 kN, guided axially by the outer-ring ribs The crowned outside surface of the 16 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 12 mm width. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 16 mm track diameter and 4.9 kN dynamic rating match the duty. In robotic arm linear axes the unit fits a compact 5 mm seat, and in agricultural and textile cam followers the 15 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 12 mm width and the published 6.7 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 16 mm outer ring does. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 16 mm outer ring does.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV5-PP?",
        "a": "The NATV5-PP is a NATV full-complement yoke-type track roller with axial guidance with 16 mm outside diameter, 5 mm bore and 12 mm width, envelope 5×16×12 mm. Mass is 15 g."
      },
      {
        "q": "What does the NATV5-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV5-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 5×16×12 mm and the catalogue ratings are C 4.9 kN, C0 6.7 kN, Cur 0.97 kN."
      },
      {
        "q": "What is the load capacity of the NATV5-PP?",
        "a": "The basic dynamic load rating C is 4.9 kN and the basic static load rating C0 is 6.7 kN; the fatigue load limit Cur is 0.97 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV5-PP?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV5-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 16 mm outer surface tolerates only small angular error. The inner ring lets the 5 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV5",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV5-PP",
      "NATV5-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR6",
    "brand": "FAG",
    "manufacturer_designation": "NATR6",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.5,
    "static_load_kN": 4.05,
    "fatigue_load_limit_kN": 0.55,
    "limiting_speed_rpm": 11000,
    "max_rpm": 11000,
    "weight_g": 20,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 6×19×12 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 3.5 kN and C0 4.05 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.86 reflects a rolling-element pack sized for heavy static track loading, and the 6.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.55 kN at 6 mm bore, equivalent to 0.58 kN of dynamic rating per millimetre — the limiting speed is 11,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.29 kN per millimetre of rolling-element complement mass is 20 g, or 0.09 g per mm² of the 19×12 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm pin bore and only 20 g: the smallest sizes demand accurate shaft geometry, because the 6.5 mm section leaves no tolerance for a soft or tapered seat At 6 mm bore and 20 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load NATR is the caged yoke-type track roller: a needle roller and cage assembly runs inside the rib-guided thick-walled outer ring on the 6 mm inner-ring bore Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 19 mm track diameter and 3.5 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 6 mm seat, and in printing press sheet-transfer grippers the 20 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 12 mm width and the published 4.05 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR6?",
        "a": "The NATR6 is a NATR yoke-type track roller with cage and axial guidance with 19 mm outside diameter, 6 mm bore and 12 mm width, envelope 6×19×12 mm. Mass is 20 g."
      },
      {
        "q": "What does the NATR6 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR6 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×19×12 mm and the catalogue ratings are C 3.5 kN, C0 4.05 kN, Cur 0.55 kN."
      },
      {
        "q": "What is the load capacity of the NATR6?",
        "a": "The basic dynamic load rating C is 3.5 kN and the basic static load rating C0 is 4.05 kN; the fatigue load limit Cur is 0.55 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR6?",
        "a": "HR1 lists a limiting speed of 11,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR6?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The inner ring lets the 6 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR6-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR6",
      "NATR6"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR6-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR6-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.5,
    "static_load_kN": 4.05,
    "fatigue_load_limit_kN": 0.55,
    "limiting_speed_rpm": 11000,
    "max_rpm": 11000,
    "weight_g": 19,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 6×19×12 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 3.5 kN and C0 4.05 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.86 reflects a rolling-element pack sized for heavy static track loading, and the 6.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.55 kN at 6 mm bore, equivalent to 0.58 kN of dynamic rating per millimetre — the limiting speed is 11,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.29 kN per millimetre of rolling-element complement mass is 19 g, or 0.08 g per mm² of the 19×12 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm pin bore and only 19 g: the smallest sizes demand accurate shaft geometry, because the 6.5 mm section leaves no tolerance for a soft or tapered seat The cage keeps the NATV at the higher limiting speed of 11,000 r/min for a track roller, with C 3.5 kN and C0 4.05 kN Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the PP suffix adds lip seals on both sides and a life-long grease fill Reading -PP: rubbing seals at each face of the 19 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 19 mm track diameter and 3.5 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 6 mm seat, and in conveyor transfer and diverting stations the 19 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 12 mm width and the published 4.05 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR6-PP?",
        "a": "The NATR6-PP is a NATR yoke-type track roller with cage and axial guidance with 19 mm outside diameter, 6 mm bore and 12 mm width, envelope 6×19×12 mm. Mass is 19 g."
      },
      {
        "q": "What does the NATR6-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR6-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×19×12 mm and the catalogue ratings are C 3.5 kN, C0 4.05 kN, Cur 0.55 kN."
      },
      {
        "q": "What is the load capacity of the NATR6-PP?",
        "a": "The basic dynamic load rating C is 3.5 kN and the basic static load rating C0 is 4.05 kN; the fatigue load limit Cur is 0.55 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR6-PP?",
        "a": "HR1 lists a limiting speed of 11,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR6-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The inner ring lets the 6 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR6",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR6-PP",
      "NATR6-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV6",
    "brand": "FAG",
    "manufacturer_designation": "NATV6",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 5.4,
    "static_load_kN": 8.1,
    "fatigue_load_limit_kN": 1.19,
    "limiting_speed_rpm": 3100,
    "max_rpm": 3100,
    "weight_g": 21,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 6×19×12 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 5.4 kN and C0 8.1 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 6.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.19 kN at 6 mm bore, equivalent to 0.90 kN of dynamic rating per millimetre — the limiting speed is 3,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.45 kN per millimetre of rolling-element complement mass is 21 g, or 0.09 g per mm² of the 19×12 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm pin bore and only 21 g: the smallest sizes demand accurate shaft geometry, because the 6.5 mm section leaves no tolerance for a soft or tapered seat NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 19 mm envelope for maximum C0 8.1 kN, guided axially by the outer-ring ribs The cageless rollers can brinell on very short oscillating strokes — the motion must rotate the full pack, not just rock it Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 19 mm track diameter and 5.4 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 6 mm seat, and in automatic assembly machine carriages the 21 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 12 mm width and the published 8.1 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV6?",
        "a": "The NATV6 is a NATV full-complement yoke-type track roller with axial guidance with 19 mm outside diameter, 6 mm bore and 12 mm width, envelope 6×19×12 mm. Mass is 21 g."
      },
      {
        "q": "What does the NATV6 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV6 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×19×12 mm and the catalogue ratings are C 5.4 kN, C0 8.1 kN, Cur 1.19 kN."
      },
      {
        "q": "What is the load capacity of the NATV6?",
        "a": "The basic dynamic load rating C is 5.4 kN and the basic static load rating C0 is 8.1 kN; the fatigue load limit Cur is 1.19 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV6?",
        "a": "HR1 lists a limiting speed of 3,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV6?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The inner ring lets the 6 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV6-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV6",
      "NATV6"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV6-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV6-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 5.4,
    "static_load_kN": 8.1,
    "fatigue_load_limit_kN": 1.19,
    "limiting_speed_rpm": 3100,
    "max_rpm": 3100,
    "weight_g": 21,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 6×19×12 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm bore — and the 12 mm width sets the contact width on the mating track the catalogue lists C 5.4 kN and C0 8.1 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 6.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.19 kN at 6 mm bore, equivalent to 0.90 kN of dynamic rating per millimetre — the limiting speed is 3,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 6 mm bore takes the mounting pin or shaft; across the 12 mm contact width the dynamic rating works out to 0.45 kN per millimetre of rolling-element complement mass is 21 g, or 0.09 g per mm² of the 19×12 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm pin bore and only 21 g: the smallest sizes demand accurate shaft geometry, because the 6.5 mm section leaves no tolerance for a soft or tapered seat Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the PP suffix adds lip seals on both sides and a life-long grease fill The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 12 mm width covers most standard cam geometries -PP protection suits cams and rails that are washed down or run in dust; exceeding the 3,100 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 19 mm track diameter and 5.4 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 6 mm seat, and in printing press sheet-transfer grippers the 21 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 12 mm width and the published 8.1 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 19 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV6-PP?",
        "a": "The NATV6-PP is a NATV full-complement yoke-type track roller with axial guidance with 19 mm outside diameter, 6 mm bore and 12 mm width, envelope 6×19×12 mm. Mass is 21 g."
      },
      {
        "q": "What does the NATV6-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV6-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×19×12 mm and the catalogue ratings are C 5.4 kN, C0 8.1 kN, Cur 1.19 kN."
      },
      {
        "q": "What is the load capacity of the NATV6-PP?",
        "a": "The basic dynamic load rating C is 5.4 kN and the basic static load rating C0 is 8.1 kN; the fatigue load limit Cur is 1.19 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV6-PP?",
        "a": "HR1 lists a limiting speed of 3,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV6-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 19 mm outer surface tolerates only small angular error. The inner ring lets the 6 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV6",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV6-PP",
      "NATV6-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR8",
    "brand": "FAG",
    "manufacturer_designation": "NATR8",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 5.5,
    "static_load_kN": 6.7,
    "fatigue_load_limit_kN": 0.94,
    "limiting_speed_rpm": 7500,
    "max_rpm": 7500,
    "weight_g": 41,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 8×24×15 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 5.5 kN and C0 6.7 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.82 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.94 kN at 8 mm bore, equivalent to 0.69 kN of dynamic rating per millimetre — the limiting speed is 7,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.37 kN per millimetre of rolling-element complement mass is 41 g, or 0.11 g per mm² of the 24×15 mm track envelope — inertia that the drive must accelerate on every index of the cam the 8 mm pin bore sits in the miniature band; at 15 mm wide the NATR8 is built into compact cam drives, indexing pawls and light linkages At 8 mm bore and 41 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load The cage can be damaged by heavy shock loads even though the rollers would survive — size to C, not just envelope Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 24 mm track diameter and 5.5 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 8 mm seat, and in linear rail and profile track guidance the 41 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 15 mm width and the published 6.7 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR8?",
        "a": "The NATR8 is a NATR yoke-type track roller with cage and axial guidance with 24 mm outside diameter, 8 mm bore and 15 mm width, envelope 8×24×15 mm. Mass is 41 g."
      },
      {
        "q": "What does the NATR8 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR8 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×24×15 mm and the catalogue ratings are C 5.5 kN, C0 6.7 kN, Cur 0.94 kN."
      },
      {
        "q": "What is the load capacity of the NATR8?",
        "a": "The basic dynamic load rating C is 5.5 kN and the basic static load rating C0 is 6.7 kN; the fatigue load limit Cur is 0.94 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR8?",
        "a": "HR1 lists a limiting speed of 7,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR8?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The inner ring lets the 8 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR8-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR8",
      "NATR8"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR8-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR8-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 5.5,
    "static_load_kN": 6.7,
    "fatigue_load_limit_kN": 0.94,
    "limiting_speed_rpm": 7500,
    "max_rpm": 7500,
    "weight_g": 38,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 8×24×15 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 5.5 kN and C0 6.7 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.82 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.94 kN at 8 mm bore, equivalent to 0.69 kN of dynamic rating per millimetre — the limiting speed is 7,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.37 kN per millimetre of rolling-element complement mass is 38 g, or 0.11 g per mm² of the 24×15 mm track envelope — inertia that the drive must accelerate on every index of the cam the 8 mm pin bore sits in the miniature band; at 15 mm wide the NATR8-PP is built into compact cam drives, indexing pawls and light linkages Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the PP suffix adds lip seals on both sides and a life-long grease fill The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 15 mm width covers most standard cam geometries The -PP suffix fits contact lip seals on both sides, retaining the factory grease and excluding water and dust; seal friction is reflected in the 7,500 r/min limiting speed. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 24 mm track diameter and 5.5 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 8 mm seat, and in printing press sheet-transfer grippers the 38 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 15 mm width and the published 6.7 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 24 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR8-PP?",
        "a": "The NATR8-PP is a NATR yoke-type track roller with cage and axial guidance with 24 mm outside diameter, 8 mm bore and 15 mm width, envelope 8×24×15 mm. Mass is 38 g."
      },
      {
        "q": "What does the NATR8-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR8-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×24×15 mm and the catalogue ratings are C 5.5 kN, C0 6.7 kN, Cur 0.94 kN."
      },
      {
        "q": "What is the load capacity of the NATR8-PP?",
        "a": "The basic dynamic load rating C is 5.5 kN and the basic static load rating C0 is 6.7 kN; the fatigue load limit Cur is 0.94 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR8-PP?",
        "a": "HR1 lists a limiting speed of 7,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR8-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The inner ring lets the 8 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR8",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR8-PP",
      "NATR8-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV8",
    "brand": "FAG",
    "manufacturer_designation": "NATV8",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 7.8,
    "static_load_kN": 11.7,
    "fatigue_load_limit_kN": 1.62,
    "limiting_speed_rpm": 2500,
    "max_rpm": 2500,
    "weight_g": 42,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 8×24×15 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 7.8 kN and C0 11.7 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.62 kN at 8 mm bore, equivalent to 0.97 kN of dynamic rating per millimetre — the limiting speed is 2,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.52 kN per millimetre of rolling-element complement mass is 42 g, or 0.12 g per mm² of the 24×15 mm track envelope — inertia that the drive must accelerate on every index of the cam the 8 mm pin bore sits in the miniature band; at 15 mm wide the NATV8 is built into compact cam drives, indexing pawls and light linkages The cageless rollers can brinell on very short oscillating strokes — the motion must rotate the full pack, not just rock it The crowned outside surface of the 24 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 24 mm track diameter and 7.8 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 8 mm seat, and in conveyor transfer and diverting stations the 42 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 15 mm width and the published 11.7 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV8?",
        "a": "The NATV8 is a NATV full-complement yoke-type track roller with axial guidance with 24 mm outside diameter, 8 mm bore and 15 mm width, envelope 8×24×15 mm. Mass is 42 g."
      },
      {
        "q": "What does the NATV8 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV8 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×24×15 mm and the catalogue ratings are C 7.8 kN, C0 11.7 kN, Cur 1.62 kN."
      },
      {
        "q": "What is the load capacity of the NATV8?",
        "a": "The basic dynamic load rating C is 7.8 kN and the basic static load rating C0 is 11.7 kN; the fatigue load limit Cur is 1.62 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV8?",
        "a": "HR1 lists a limiting speed of 2,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV8?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The inner ring lets the 8 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV8-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV8",
      "NATV8"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV8-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV8-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 7.8,
    "static_load_kN": 11.7,
    "fatigue_load_limit_kN": 1.62,
    "limiting_speed_rpm": 2500,
    "max_rpm": 2500,
    "weight_g": 41,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 8×24×15 mm: the 24 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 7.8 kN and C0 11.7 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 8.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.62 kN at 8 mm bore, equivalent to 0.97 kN of dynamic rating per millimetre — the limiting speed is 2,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 8 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.52 kN per millimetre of rolling-element complement mass is 41 g, or 0.11 g per mm² of the 24×15 mm track envelope — inertia that the drive must accelerate on every index of the cam 8 mm pin bore and only 41 g: the smallest sizes demand accurate shaft geometry, because the 8.0 mm section leaves no tolerance for a soft or tapered seat NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 24 mm envelope for maximum C0 11.7 kN, guided axially by the outer-ring ribs Without a cage the NATV trades speed for static capacity — the limiting speed is 2,500 r/min, with C 7.8 kN and C0 11.7 kN The -PP suffix fits contact lip seals on both sides, retaining the factory grease and excluding water and dust; seal friction is reflected in the 2,500 r/min limiting speed. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 24 mm track diameter and 7.8 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 8 mm seat, and in conveyor transfer and diverting stations the 41 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 15 mm width and the published 11.7 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV8-PP?",
        "a": "The NATV8-PP is a NATV full-complement yoke-type track roller with axial guidance with 24 mm outside diameter, 8 mm bore and 15 mm width, envelope 8×24×15 mm. Mass is 41 g."
      },
      {
        "q": "What does the NATV8-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV8-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×24×15 mm and the catalogue ratings are C 7.8 kN, C0 11.7 kN, Cur 1.62 kN."
      },
      {
        "q": "What is the load capacity of the NATV8-PP?",
        "a": "The basic dynamic load rating C is 7.8 kN and the basic static load rating C0 is 11.7 kN; the fatigue load limit Cur is 1.62 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV8-PP?",
        "a": "HR1 lists a limiting speed of 2,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV8-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 24 mm outer surface tolerates only small angular error. The inner ring lets the 8 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV8",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV8-PP",
      "NATV8-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR10",
    "brand": "FAG",
    "manufacturer_designation": "NATR10",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 6.8,
    "static_load_kN": 8.7,
    "fatigue_load_limit_kN": 1.24,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 64,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×30×15 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 6.8 kN and C0 8.7 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.78 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.24 kN at 10 mm bore, equivalent to 0.68 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.45 kN per millimetre of rolling-element complement mass is 64 g, or 0.14 g per mm² of the 30×15 mm track envelope — inertia that the drive must accelerate on every index of the cam at 10 mm pin bore this is one of the smallest HR1 executions — chosen where a 30 mm envelope must carry line-contact loads that no miniature ball bearing could take At 10 mm bore and 64 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 30 mm track diameter and 6.8 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 10 mm seat, and in packaging machine timing mechanisms the 64 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 15 mm width and the published 8.7 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 30 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR10?",
        "a": "The NATR10 is a NATR yoke-type track roller with cage and axial guidance with 30 mm outside diameter, 10 mm bore and 15 mm width, envelope 10×30×15 mm. Mass is 64 g."
      },
      {
        "q": "What does the NATR10 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR10 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×30×15 mm and the catalogue ratings are C 6.8 kN, C0 8.7 kN, Cur 1.24 kN."
      },
      {
        "q": "What is the load capacity of the NATR10?",
        "a": "The basic dynamic load rating C is 6.8 kN and the basic static load rating C0 is 8.7 kN; the fatigue load limit Cur is 1.24 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR10?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR10?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The inner ring lets the 10 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR10-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR10",
      "NATR10"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR10-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR10-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 6.8,
    "static_load_kN": 8.7,
    "fatigue_load_limit_kN": 1.24,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 64,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×30×15 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 6.8 kN and C0 8.7 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.78 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.24 kN at 10 mm bore, equivalent to 0.68 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.45 kN per millimetre of rolling-element complement mass is 64 g, or 0.14 g per mm² of the 30×15 mm track envelope — inertia that the drive must accelerate on every index of the cam at 10 mm pin bore this is one of the smallest HR1 executions — chosen where a 30 mm envelope must carry line-contact loads that no miniature ball bearing could take At 10 mm bore and 64 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load NATR is the caged yoke-type track roller: a needle roller and cage assembly runs inside the rib-guided thick-walled outer ring on the 10 mm inner-ring bore -PP protection suits cams and rails that are washed down or run in dust; exceeding the 5,500 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 30 mm track diameter and 6.8 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 10 mm seat, and in cam drives and indexing tables the 64 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 15 mm width and the published 8.7 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR10-PP?",
        "a": "The NATR10-PP is a NATR yoke-type track roller with cage and axial guidance with 30 mm outside diameter, 10 mm bore and 15 mm width, envelope 10×30×15 mm. Mass is 64 g."
      },
      {
        "q": "What does the NATR10-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR10-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×30×15 mm and the catalogue ratings are C 6.8 kN, C0 8.7 kN, Cur 1.24 kN."
      },
      {
        "q": "What is the load capacity of the NATR10-PP?",
        "a": "The basic dynamic load rating C is 6.8 kN and the basic static load rating C0 is 8.7 kN; the fatigue load limit Cur is 1.24 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR10-PP?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR10-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The inner ring lets the 10 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR10",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR10-PP",
      "NATR10-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV10",
    "brand": "FAG",
    "manufacturer_designation": "NATV10",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 9.4,
    "static_load_kN": 15.1,
    "fatigue_load_limit_kN": 2.08,
    "limiting_speed_rpm": 2100,
    "max_rpm": 2100,
    "weight_g": 65,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×30×15 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 9.4 kN and C0 15.1 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.62 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.08 kN at 10 mm bore, equivalent to 0.94 kN of dynamic rating per millimetre — the limiting speed is 2,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.63 kN per millimetre of rolling-element complement mass is 65 g, or 0.14 g per mm² of the 30×15 mm track envelope — inertia that the drive must accelerate on every index of the cam 10 mm pin bore and only 65 g: the smallest sizes demand accurate shaft geometry, because the 10.0 mm section leaves no tolerance for a soft or tapered seat The cageless rollers can brinell on very short oscillating strokes — the motion must rotate the full pack, not just rock it The crowned outside surface of the 30 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 30 mm track diameter and 9.4 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 10 mm seat, and in automatic assembly machine carriages the 65 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 15 mm width and the published 15.1 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV10?",
        "a": "The NATV10 is a NATV full-complement yoke-type track roller with axial guidance with 30 mm outside diameter, 10 mm bore and 15 mm width, envelope 10×30×15 mm. Mass is 65 g."
      },
      {
        "q": "What does the NATV10 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV10 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×30×15 mm and the catalogue ratings are C 9.4 kN, C0 15.1 kN, Cur 2.08 kN."
      },
      {
        "q": "What is the load capacity of the NATV10?",
        "a": "The basic dynamic load rating C is 9.4 kN and the basic static load rating C0 is 15.1 kN; the fatigue load limit Cur is 2.08 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV10?",
        "a": "HR1 lists a limiting speed of 2,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV10?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The inner ring lets the 10 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV10-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV10",
      "NATV10"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV10-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV10-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 9.4,
    "static_load_kN": 15.1,
    "fatigue_load_limit_kN": 2.08,
    "limiting_speed_rpm": 2100,
    "max_rpm": 2100,
    "weight_g": 64,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 10×30×15 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 9.4 kN and C0 15.1 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.62 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.08 kN at 10 mm bore, equivalent to 0.94 kN of dynamic rating per millimetre — the limiting speed is 2,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 10 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.63 kN per millimetre of rolling-element complement mass is 64 g, or 0.14 g per mm² of the 30×15 mm track envelope — inertia that the drive must accelerate on every index of the cam the 10 mm pin bore sits in the miniature band; at 15 mm wide the NATV10-PP is built into compact cam drives, indexing pawls and light linkages NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 30 mm envelope for maximum C0 15.1 kN, guided axially by the outer-ring ribs The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 15 mm width covers most standard cam geometries -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 15 mm width. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 30 mm track diameter and 9.4 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 10 mm seat, and in cam drives and indexing tables the 64 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 15 mm width and the published 15.1 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 30 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV10-PP?",
        "a": "The NATV10-PP is a NATV full-complement yoke-type track roller with axial guidance with 30 mm outside diameter, 10 mm bore and 15 mm width, envelope 10×30×15 mm. Mass is 64 g."
      },
      {
        "q": "What does the NATV10-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV10-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×30×15 mm and the catalogue ratings are C 9.4 kN, C0 15.1 kN, Cur 2.08 kN."
      },
      {
        "q": "What is the load capacity of the NATV10-PP?",
        "a": "The basic dynamic load rating C is 9.4 kN and the basic static load rating C0 is 15.1 kN; the fatigue load limit Cur is 2.08 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV10-PP?",
        "a": "HR1 lists a limiting speed of 2,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV10-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 30 mm outer surface tolerates only small angular error. The inner ring lets the 10 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV10",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV10-PP",
      "NATV10-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR12",
    "brand": "FAG",
    "manufacturer_designation": "NATR12",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7,
    "static_load_kN": 9.2,
    "fatigue_load_limit_kN": 1.32,
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500,
    "weight_g": 71,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×32×15 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 7 kN and C0 9.2 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.32 kN at 12 mm bore, equivalent to 0.58 kN of dynamic rating per millimetre — the limiting speed is 4,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.47 kN per millimetre of rolling-element complement mass is 71 g, or 0.15 g per mm² of the 32×15 mm track envelope — inertia that the drive must accelerate on every index of the cam 12 mm pin bore and only 71 g: the smallest sizes demand accurate shaft geometry, because the 10.0 mm section leaves no tolerance for a soft or tapered seat The cage keeps the NATV at the higher limiting speed of 4,500 r/min for a track roller, with C 7 kN and C0 9.2 kN The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 15 mm width covers most standard cam geometries Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 32 mm track diameter and 7 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 12 mm seat, and in cam drives and indexing tables the 71 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 15 mm width and the published 9.2 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 32 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR12?",
        "a": "The NATR12 is a NATR yoke-type track roller with cage and axial guidance with 32 mm outside diameter, 12 mm bore and 15 mm width, envelope 12×32×15 mm. Mass is 71 g."
      },
      {
        "q": "What does the NATR12 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR12 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×15 mm and the catalogue ratings are C 7 kN, C0 9.2 kN, Cur 1.32 kN."
      },
      {
        "q": "What is the load capacity of the NATR12?",
        "a": "The basic dynamic load rating C is 7 kN and the basic static load rating C0 is 9.2 kN; the fatigue load limit Cur is 1.32 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR12?",
        "a": "HR1 lists a limiting speed of 4,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR12?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The inner ring lets the 12 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR12-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR12",
      "NATR12"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR12-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR12-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7,
    "static_load_kN": 9.2,
    "fatigue_load_limit_kN": 1.32,
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500,
    "weight_g": 66,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×32×15 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 7 kN and C0 9.2 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.32 kN at 12 mm bore, equivalent to 0.58 kN of dynamic rating per millimetre — the limiting speed is 4,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.47 kN per millimetre of rolling-element complement mass is 66 g, or 0.14 g per mm² of the 32×15 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm pin bore this is one of the smallest HR1 executions — chosen where a 32 mm envelope must carry line-contact loads that no miniature ball bearing could take At 12 mm bore and 66 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load The crowned outside surface of the 32 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Reading -PP: rubbing seals at each face of the 32 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 32 mm track diameter and 7 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 12 mm seat, and in automotive welding jig rollers the 66 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 15 mm width and the published 9.2 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR12-PP?",
        "a": "The NATR12-PP is a NATR yoke-type track roller with cage and axial guidance with 32 mm outside diameter, 12 mm bore and 15 mm width, envelope 12×32×15 mm. Mass is 66 g."
      },
      {
        "q": "What does the NATR12-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR12-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×15 mm and the catalogue ratings are C 7 kN, C0 9.2 kN, Cur 1.32 kN."
      },
      {
        "q": "What is the load capacity of the NATR12-PP?",
        "a": "The basic dynamic load rating C is 7 kN and the basic static load rating C0 is 9.2 kN; the fatigue load limit Cur is 1.32 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR12-PP?",
        "a": "HR1 lists a limiting speed of 4,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR12-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The inner ring lets the 12 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR12",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR12-PP",
      "NATR12-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV12",
    "brand": "FAG",
    "manufacturer_designation": "NATV12",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 9.7,
    "static_load_kN": 15.9,
    "fatigue_load_limit_kN": 2.21,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 72,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×32×15 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 9.7 kN and C0 15.9 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.61 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.21 kN at 12 mm bore, equivalent to 0.81 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.65 kN per millimetre of rolling-element complement mass is 72 g, or 0.15 g per mm² of the 32×15 mm track envelope — inertia that the drive must accelerate on every index of the cam the 12 mm pin bore sits in the miniature band; at 15 mm wide the NATV12 is built into compact cam drives, indexing pawls and light linkages Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the open execution is relubricated through the inner ring or pin NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 32 mm envelope for maximum C0 15.9 kN, guided axially by the outer-ring ribs Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 32 mm track diameter and 9.7 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 12 mm seat, and in conveyor transfer and diverting stations the 72 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 15 mm width and the published 15.9 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 32 mm outer ring does. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 32 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV12?",
        "a": "The NATV12 is a NATV full-complement yoke-type track roller with axial guidance with 32 mm outside diameter, 12 mm bore and 15 mm width, envelope 12×32×15 mm. Mass is 72 g."
      },
      {
        "q": "What does the NATV12 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV12 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×15 mm and the catalogue ratings are C 9.7 kN, C0 15.9 kN, Cur 2.21 kN."
      },
      {
        "q": "What is the load capacity of the NATV12?",
        "a": "The basic dynamic load rating C is 9.7 kN and the basic static load rating C0 is 15.9 kN; the fatigue load limit Cur is 2.21 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV12?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV12?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The inner ring lets the 12 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV12-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV12",
      "NATV12"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV12-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV12-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 9.7,
    "static_load_kN": 15.9,
    "fatigue_load_limit_kN": 2.21,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 69,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 12×32×15 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm bore — and the 15 mm width sets the contact width on the mating track the catalogue lists C 9.7 kN and C0 15.9 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.61 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.21 kN at 12 mm bore, equivalent to 0.81 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 12 mm bore takes the mounting pin or shaft; across the 15 mm contact width the dynamic rating works out to 0.65 kN per millimetre of rolling-element complement mass is 69 g, or 0.14 g per mm² of the 32×15 mm track envelope — inertia that the drive must accelerate on every index of the cam the 12 mm pin bore sits in the miniature band; at 15 mm wide the NATV12-PP is built into compact cam drives, indexing pawls and light linkages At 12 mm bore and 69 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the PP suffix adds lip seals on both sides and a life-long grease fill Reading -PP: rubbing seals at each face of the 32 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 32 mm track diameter and 9.7 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 12 mm seat, and in automotive welding jig rollers the 69 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 15 mm width and the published 15.9 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV12-PP?",
        "a": "The NATV12-PP is a NATV full-complement yoke-type track roller with axial guidance with 32 mm outside diameter, 12 mm bore and 15 mm width, envelope 12×32×15 mm. Mass is 69 g."
      },
      {
        "q": "What does the NATV12-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV12-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×15 mm and the catalogue ratings are C 9.7 kN, C0 15.9 kN, Cur 2.21 kN."
      },
      {
        "q": "What is the load capacity of the NATV12-PP?",
        "a": "The basic dynamic load rating C is 9.7 kN and the basic static load rating C0 is 15.9 kN; the fatigue load limit Cur is 2.21 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV12-PP?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV12-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 32 mm outer surface tolerates only small angular error. The inner ring lets the 12 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV12",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV12-PP",
      "NATV12-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR15",
    "brand": "FAG",
    "manufacturer_designation": "NATR15",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.7,
    "static_load_kN": 14.5,
    "fatigue_load_limit_kN": 1.86,
    "limiting_speed_rpm": 3600,
    "max_rpm": 3600,
    "weight_g": 101,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×19 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 9.7 kN and C0 14.5 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.86 kN at 15 mm bore, equivalent to 0.65 kN of dynamic rating per millimetre — the limiting speed is 3,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.51 kN per millimetre of rolling-element complement mass is 101 g, or 0.15 g per mm² of the 35×19 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 15 mm pin bore the 19 mm width and 9.7 kN C rating suit high-cycle industrial machinery rather than instrument duty The cage keeps the NATV at the higher limiting speed of 3,600 r/min for a track roller, with C 9.7 kN and C0 14.5 kN Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the open execution is relubricated through the inner ring or pin Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 35 mm track diameter and 9.7 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 15 mm seat, and in linear rail and profile track guidance the 101 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 19 mm width and the published 14.5 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR15?",
        "a": "The NATR15 is a NATR yoke-type track roller with cage and axial guidance with 35 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×35×19 mm. Mass is 101 g."
      },
      {
        "q": "What does the NATR15 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR15 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×35×19 mm and the catalogue ratings are C 9.7 kN, C0 14.5 kN, Cur 1.86 kN."
      },
      {
        "q": "What is the load capacity of the NATR15?",
        "a": "The basic dynamic load rating C is 9.7 kN and the basic static load rating C0 is 14.5 kN; the fatigue load limit Cur is 1.86 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR15?",
        "a": "HR1 lists a limiting speed of 3,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR15?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR15-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR15",
      "NATR15"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR15-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR15-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.7,
    "static_load_kN": 14.5,
    "fatigue_load_limit_kN": 1.86,
    "limiting_speed_rpm": 3600,
    "max_rpm": 3600,
    "weight_g": 95,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×19 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 9.7 kN and C0 14.5 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.86 kN at 15 mm bore, equivalent to 0.65 kN of dynamic rating per millimetre — the limiting speed is 3,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.51 kN per millimetre of rolling-element complement mass is 95 g, or 0.14 g per mm² of the 35×19 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 15 mm pin bore the 19 mm width and 9.7 kN C rating suit high-cycle industrial machinery rather than instrument duty The crowned outside surface of the 35 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 19 mm width covers most standard cam geometries The -PP suffix fits contact lip seals on both sides, retaining the factory grease and excluding water and dust; seal friction is reflected in the 3,600 r/min limiting speed. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 35 mm track diameter and 9.7 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 15 mm seat, and in automatic assembly machine carriages the 95 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 19 mm width and the published 14.5 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR15-PP?",
        "a": "The NATR15-PP is a NATR yoke-type track roller with cage and axial guidance with 35 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×35×19 mm. Mass is 95 g."
      },
      {
        "q": "What does the NATR15-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR15-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×35×19 mm and the catalogue ratings are C 9.7 kN, C0 14.5 kN, Cur 1.86 kN."
      },
      {
        "q": "What is the load capacity of the NATR15-PP?",
        "a": "The basic dynamic load rating C is 9.7 kN and the basic static load rating C0 is 14.5 kN; the fatigue load limit Cur is 1.86 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR15-PP?",
        "a": "HR1 lists a limiting speed of 3,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR15-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR15",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR15-PP",
      "NATR15-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV15",
    "brand": "FAG",
    "manufacturer_designation": "NATV15",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 12.6,
    "static_load_kN": 23.4,
    "fatigue_load_limit_kN": 3.25,
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600,
    "weight_g": 109,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×19 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 12.6 kN and C0 23.4 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.54 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.25 kN at 15 mm bore, equivalent to 0.84 kN of dynamic rating per millimetre — the limiting speed is 1,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.66 kN per millimetre of rolling-element complement mass is 109 g, or 0.16 g per mm² of the 35×19 mm track envelope — inertia that the drive must accelerate on every index of the cam at 15 mm pin bore this size balances the 35 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range At 15 mm bore and 109 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load The crowned outside surface of the 35 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 35 mm track diameter and 12.6 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 15 mm seat, and in packaging machine timing mechanisms the 109 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 19 mm width and the published 23.4 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV15?",
        "a": "The NATV15 is a NATV full-complement yoke-type track roller with axial guidance with 35 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×35×19 mm. Mass is 109 g."
      },
      {
        "q": "What does the NATV15 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV15 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×35×19 mm and the catalogue ratings are C 12.6 kN, C0 23.4 kN, Cur 3.25 kN."
      },
      {
        "q": "What is the load capacity of the NATV15?",
        "a": "The basic dynamic load rating C is 12.6 kN and the basic static load rating C0 is 23.4 kN; the fatigue load limit Cur is 3.25 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV15?",
        "a": "HR1 lists a limiting speed of 1,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV15?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV15-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV15",
      "NATV15"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV15-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV15-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 12.6,
    "static_load_kN": 23.4,
    "fatigue_load_limit_kN": 3.25,
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600,
    "weight_g": 101,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×19 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 12.6 kN and C0 23.4 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.54 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.25 kN at 15 mm bore, equivalent to 0.84 kN of dynamic rating per millimetre — the limiting speed is 1,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.66 kN per millimetre of rolling-element complement mass is 101 g, or 0.15 g per mm² of the 35×19 mm track envelope — inertia that the drive must accelerate on every index of the cam the 15 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 19 mm width covers most standard cam geometries The crowned outside surface of the 35 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Reading -PP: rubbing seals at each face of the 35 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 35 mm track diameter and 12.6 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 15 mm seat, and in automatic assembly machine carriages the 101 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 19 mm width and the published 23.4 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV15-PP?",
        "a": "The NATV15-PP is a NATV full-complement yoke-type track roller with axial guidance with 35 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×35×19 mm. Mass is 101 g."
      },
      {
        "q": "What does the NATV15-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV15-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×35×19 mm and the catalogue ratings are C 12.6 kN, C0 23.4 kN, Cur 3.25 kN."
      },
      {
        "q": "What is the load capacity of the NATV15-PP?",
        "a": "The basic dynamic load rating C is 12.6 kN and the basic static load rating C0 is 23.4 kN; the fatigue load limit Cur is 3.25 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV15-PP?",
        "a": "HR1 lists a limiting speed of 1,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV15-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV15",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV15-PP",
      "NATV15-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR17",
    "brand": "FAG",
    "manufacturer_designation": "NATR17",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 10.9,
    "static_load_kN": 16,
    "fatigue_load_limit_kN": 2.13,
    "limiting_speed_rpm": 2900,
    "max_rpm": 2900,
    "weight_g": 144,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×21 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 10.9 kN and C0 16 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.13 kN at 17 mm bore, equivalent to 0.64 kN of dynamic rating per millimetre — the limiting speed is 2,900 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 0.52 kN per millimetre of rolling-element complement mass is 144 g, or 0.17 g per mm² of the 40×21 mm track envelope — inertia that the drive must accelerate on every index of the cam at 17 mm pin bore this size balances the 40 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The cage can be damaged by heavy shock loads even though the rollers would survive — size to C, not just envelope Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 40 mm track diameter and 10.9 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 17 mm seat, and in automotive welding jig rollers the 144 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 21 mm width and the published 16 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR17?",
        "a": "The NATR17 is a NATR yoke-type track roller with cage and axial guidance with 40 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×40×21 mm. Mass is 144 g."
      },
      {
        "q": "What does the NATR17 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR17 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×40×21 mm and the catalogue ratings are C 10.9 kN, C0 16 kN, Cur 2.13 kN."
      },
      {
        "q": "What is the load capacity of the NATR17?",
        "a": "The basic dynamic load rating C is 10.9 kN and the basic static load rating C0 is 16 kN; the fatigue load limit Cur is 2.13 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR17?",
        "a": "HR1 lists a limiting speed of 2,900 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR17?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR17-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR17",
      "NATR17"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR17-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR17-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 10.9,
    "static_load_kN": 16,
    "fatigue_load_limit_kN": 2.13,
    "limiting_speed_rpm": 2900,
    "max_rpm": 2900,
    "weight_g": 139,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×21 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 10.9 kN and C0 16 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.13 kN at 17 mm bore, equivalent to 0.64 kN of dynamic rating per millimetre — the limiting speed is 2,900 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 0.52 kN per millimetre of rolling-element complement mass is 139 g, or 0.17 g per mm² of the 40×21 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 17 mm pin bore the 21 mm width and 10.9 kN C rating suit high-cycle industrial machinery rather than instrument duty NATR is the caged yoke-type track roller: a needle roller and cage assembly runs inside the rib-guided thick-walled outer ring on the 17 mm inner-ring bore -PP protection suits cams and rails that are washed down or run in dust; exceeding the 2,900 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 40 mm track diameter and 10.9 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 17 mm seat, and in automotive welding jig rollers the 139 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 21 mm width and the published 16 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR17-PP?",
        "a": "The NATR17-PP is a NATR yoke-type track roller with cage and axial guidance with 40 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×40×21 mm. Mass is 139 g."
      },
      {
        "q": "What does the NATR17-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR17-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×40×21 mm and the catalogue ratings are C 10.9 kN, C0 16 kN, Cur 2.13 kN."
      },
      {
        "q": "What is the load capacity of the NATR17-PP?",
        "a": "The basic dynamic load rating C is 10.9 kN and the basic static load rating C0 is 16 kN; the fatigue load limit Cur is 2.13 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR17-PP?",
        "a": "HR1 lists a limiting speed of 2,900 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR17-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR17",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR17-PP",
      "NATR17-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV17",
    "brand": "FAG",
    "manufacturer_designation": "NATV17",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 14.7,
    "static_load_kN": 27,
    "fatigue_load_limit_kN": 3.55,
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400,
    "weight_g": 152,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×21 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 14.7 kN and C0 27 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.54 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.55 kN at 17 mm bore, equivalent to 0.86 kN of dynamic rating per millimetre — the limiting speed is 1,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 0.70 kN per millimetre of rolling-element complement mass is 152 g, or 0.18 g per mm² of the 40×21 mm track envelope — inertia that the drive must accelerate on every index of the cam the 17 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Without a cage the NATV trades speed for static capacity — the limiting speed is 1,400 r/min, with C 14.7 kN and C0 27 kN NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 40 mm envelope for maximum C0 27 kN, guided axially by the outer-ring ribs Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 40 mm track diameter and 14.7 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 17 mm seat, and in cam drives and indexing tables the 152 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 21 mm width and the published 27 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV17?",
        "a": "The NATV17 is a NATV full-complement yoke-type track roller with axial guidance with 40 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×40×21 mm. Mass is 152 g."
      },
      {
        "q": "What does the NATV17 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV17 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×40×21 mm and the catalogue ratings are C 14.7 kN, C0 27 kN, Cur 3.55 kN."
      },
      {
        "q": "What is the load capacity of the NATV17?",
        "a": "The basic dynamic load rating C is 14.7 kN and the basic static load rating C0 is 27 kN; the fatigue load limit Cur is 3.55 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV17?",
        "a": "HR1 lists a limiting speed of 1,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV17?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV17-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV17",
      "NATV17"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV17-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV17-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 14.7,
    "static_load_kN": 27,
    "fatigue_load_limit_kN": 3.55,
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400,
    "weight_g": 147,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×21 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 14.7 kN and C0 27 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.54 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.55 kN at 17 mm bore, equivalent to 0.86 kN of dynamic rating per millimetre — the limiting speed is 1,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 0.70 kN per millimetre of rolling-element complement mass is 147 g, or 0.17 g per mm² of the 40×21 mm track envelope — inertia that the drive must accelerate on every index of the cam the 17 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The cageless rollers can brinell on very short oscillating strokes — the motion must rotate the full pack, not just rock it At 17 mm bore and 147 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load -PP protection suits cams and rails that are washed down or run in dust; exceeding the 1,400 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 40 mm track diameter and 14.7 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 17 mm seat, and in automotive welding jig rollers the 147 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 21 mm width and the published 27 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV17-PP?",
        "a": "The NATV17-PP is a NATV full-complement yoke-type track roller with axial guidance with 40 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×40×21 mm. Mass is 147 g."
      },
      {
        "q": "What does the NATV17-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV17-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×40×21 mm and the catalogue ratings are C 14.7 kN, C0 27 kN, Cur 3.55 kN."
      },
      {
        "q": "What is the load capacity of the NATV17-PP?",
        "a": "The basic dynamic load rating C is 14.7 kN and the basic static load rating C0 is 27 kN; the fatigue load limit Cur is 3.55 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV17-PP?",
        "a": "HR1 lists a limiting speed of 1,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV17-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV17",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV17-PP",
      "NATV17-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR20",
    "brand": "FAG",
    "manufacturer_designation": "NATR20",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 15.4,
    "static_load_kN": 26,
    "fatigue_load_limit_kN": 3.45,
    "limiting_speed_rpm": 2400,
    "max_rpm": 2400,
    "weight_g": 246,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 15.4 kN and C0 26 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.45 kN at 20 mm bore, equivalent to 0.77 kN of dynamic rating per millimetre — the limiting speed is 2,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.62 kN per millimetre of rolling-element complement mass is 246 g, or 0.21 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm pin bore this size balances the 47 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The cage keeps the NATV at the higher limiting speed of 2,400 r/min for a track roller, with C 15.4 kN and C0 26 kN Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the open execution is relubricated through the inner ring or pin Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 47 mm track diameter and 15.4 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 20 mm seat, and in automatic assembly machine carriages the 246 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 25 mm width and the published 26 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR20?",
        "a": "The NATR20 is a NATR yoke-type track roller with cage and axial guidance with 47 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×47×25 mm. Mass is 246 g."
      },
      {
        "q": "What does the NATR20 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR20 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×25 mm and the catalogue ratings are C 15.4 kN, C0 26 kN, Cur 3.45 kN."
      },
      {
        "q": "What is the load capacity of the NATR20?",
        "a": "The basic dynamic load rating C is 15.4 kN and the basic static load rating C0 is 26 kN; the fatigue load limit Cur is 3.45 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR20?",
        "a": "HR1 lists a limiting speed of 2,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR20?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR20-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR20",
      "NATR20"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR20-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR20-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 15.4,
    "static_load_kN": 26,
    "fatigue_load_limit_kN": 3.45,
    "limiting_speed_rpm": 2400,
    "max_rpm": 2400,
    "weight_g": 236,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 15.4 kN and C0 26 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.45 kN at 20 mm bore, equivalent to 0.77 kN of dynamic rating per millimetre — the limiting speed is 2,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.62 kN per millimetre of rolling-element complement mass is 236 g, or 0.20 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The cage can be damaged by heavy shock loads even though the rollers would survive — size to C, not just envelope The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 25 mm width covers most standard cam geometries Reading -PP: rubbing seals at each face of the 47 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 47 mm track diameter and 15.4 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 20 mm seat, and in woodworking machine feed tracks the 236 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 25 mm width and the published 26 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR20-PP?",
        "a": "The NATR20-PP is a NATR yoke-type track roller with cage and axial guidance with 47 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×47×25 mm. Mass is 236 g."
      },
      {
        "q": "What does the NATR20-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR20-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×25 mm and the catalogue ratings are C 15.4 kN, C0 26 kN, Cur 3.45 kN."
      },
      {
        "q": "What is the load capacity of the NATR20-PP?",
        "a": "The basic dynamic load rating C is 15.4 kN and the basic static load rating C0 is 26 kN; the fatigue load limit Cur is 3.45 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR20-PP?",
        "a": "HR1 lists a limiting speed of 2,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR20-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR20",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR20-PP",
      "NATR20-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV20",
    "brand": "FAG",
    "manufacturer_designation": "NATV20",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 20.3,
    "static_load_kN": 42.5,
    "fatigue_load_limit_kN": 6,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 254,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 20.3 kN and C0 42.5 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.48 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6 kN at 20 mm bore, equivalent to 1.02 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.81 kN per millimetre of rolling-element complement mass is 254 g, or 0.22 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The crowned outside surface of the 47 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the open execution is relubricated through the inner ring or pin Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 47 mm track diameter and 20.3 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 20 mm seat, and in woodworking machine feed tracks the 254 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 25 mm width and the published 42.5 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV20?",
        "a": "The NATV20 is a NATV full-complement yoke-type track roller with axial guidance with 47 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×47×25 mm. Mass is 254 g."
      },
      {
        "q": "What does the NATV20 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV20 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×25 mm and the catalogue ratings are C 20.3 kN, C0 42.5 kN, Cur 6 kN."
      },
      {
        "q": "What is the load capacity of the NATV20?",
        "a": "The basic dynamic load rating C is 20.3 kN and the basic static load rating C0 is 42.5 kN; the fatigue load limit Cur is 6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV20?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV20?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV20-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV20",
      "NATV20"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV20-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV20-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 20.3,
    "static_load_kN": 42.5,
    "fatigue_load_limit_kN": 6,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 245,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 20.3 kN and C0 42.5 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.48 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6 kN at 20 mm bore, equivalent to 1.02 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.81 kN per millimetre of rolling-element complement mass is 245 g, or 0.21 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm pin bore this size balances the 47 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The crowned outside surface of the 47 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading At 20 mm bore and 245 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load The -PP suffix fits contact lip seals on both sides, retaining the factory grease and excluding water and dust; seal friction is reflected in the 1,300 r/min limiting speed. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 47 mm track diameter and 20.3 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 20 mm seat, and in woodworking machine feed tracks the 245 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 25 mm width and the published 42.5 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV20-PP?",
        "a": "The NATV20-PP is a NATV full-complement yoke-type track roller with axial guidance with 47 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×47×25 mm. Mass is 245 g."
      },
      {
        "q": "What does the NATV20-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV20-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×25 mm and the catalogue ratings are C 20.3 kN, C0 42.5 kN, Cur 6 kN."
      },
      {
        "q": "What is the load capacity of the NATV20-PP?",
        "a": "The basic dynamic load rating C is 20.3 kN and the basic static load rating C0 is 42.5 kN; the fatigue load limit Cur is 6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV20-PP?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV20-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV20",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV20-PP",
      "NATV20-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR25",
    "brand": "FAG",
    "manufacturer_designation": "NATR25",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 15.3,
    "static_load_kN": 27,
    "fatigue_load_limit_kN": 3.6,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 275,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 15.3 kN and C0 27 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.57 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.6 kN at 25 mm bore, equivalent to 0.61 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.61 kN per millimetre of rolling-element complement mass is 275 g, or 0.21 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam the 25 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty At 25 mm bore and 275 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load NATR is the caged yoke-type track roller: a needle roller and cage assembly runs inside the rib-guided thick-walled outer ring on the 25 mm inner-ring bore Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 52 mm track diameter and 15.3 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 25 mm seat, and in packaging machine timing mechanisms the 275 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 25 mm width and the published 27 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR25?",
        "a": "The NATR25 is a NATR yoke-type track roller with cage and axial guidance with 52 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×52×25 mm. Mass is 275 g."
      },
      {
        "q": "What does the NATR25 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR25 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×52×25 mm and the catalogue ratings are C 15.3 kN, C0 27 kN, Cur 3.6 kN."
      },
      {
        "q": "What is the load capacity of the NATR25?",
        "a": "The basic dynamic load rating C is 15.3 kN and the basic static load rating C0 is 27 kN; the fatigue load limit Cur is 3.6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR25?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR25?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR25-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR25",
      "NATR25"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR25-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR25-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 15.3,
    "static_load_kN": 27,
    "fatigue_load_limit_kN": 3.6,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 271,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 15.3 kN and C0 27 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.57 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.6 kN at 25 mm bore, equivalent to 0.61 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.61 kN per millimetre of rolling-element complement mass is 271 g, or 0.21 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 25 mm pin bore the 25 mm width and 15.3 kN C rating suit high-cycle industrial machinery rather than instrument duty The cage can be damaged by heavy shock loads even though the rollers would survive — size to C, not just envelope The cage keeps the NATV at the higher limiting speed of 1,800 r/min for a track roller, with C 15.3 kN and C0 27 kN -PP protection suits cams and rails that are washed down or run in dust; exceeding the 1,800 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 52 mm track diameter and 15.3 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 25 mm seat, and in woodworking machine feed tracks the 271 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 25 mm width and the published 27 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR25-PP?",
        "a": "The NATR25-PP is a NATR yoke-type track roller with cage and axial guidance with 52 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×52×25 mm. Mass is 271 g."
      },
      {
        "q": "What does the NATR25-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR25-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×52×25 mm and the catalogue ratings are C 15.3 kN, C0 27 kN, Cur 3.6 kN."
      },
      {
        "q": "What is the load capacity of the NATR25-PP?",
        "a": "The basic dynamic load rating C is 15.3 kN and the basic static load rating C0 is 27 kN; the fatigue load limit Cur is 3.6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR25-PP?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR25-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR25",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR25-PP",
      "NATR25-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV25",
    "brand": "FAG",
    "manufacturer_designation": "NATV25",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 20.2,
    "static_load_kN": 44.5,
    "fatigue_load_limit_kN": 6.3,
    "limiting_speed_rpm": 1000,
    "max_rpm": 1000,
    "weight_g": 285,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 20.2 kN and C0 44.5 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.45 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6.3 kN at 25 mm bore, equivalent to 0.81 kN of dynamic rating per millimetre — the limiting speed is 1,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.81 kN per millimetre of rolling-element complement mass is 285 g, or 0.22 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 25 mm pin bore the 25 mm width and 20.2 kN C rating suit high-cycle industrial machinery rather than instrument duty At 25 mm bore and 285 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 52 mm track diameter and 20.2 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 25 mm seat, and in automatic assembly machine carriages the 285 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 25 mm width and the published 44.5 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 52 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV25?",
        "a": "The NATV25 is a NATV full-complement yoke-type track roller with axial guidance with 52 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×52×25 mm. Mass is 285 g."
      },
      {
        "q": "What does the NATV25 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV25 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×52×25 mm and the catalogue ratings are C 20.2 kN, C0 44.5 kN, Cur 6.3 kN."
      },
      {
        "q": "What is the load capacity of the NATV25?",
        "a": "The basic dynamic load rating C is 20.2 kN and the basic static load rating C0 is 44.5 kN; the fatigue load limit Cur is 6.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV25?",
        "a": "HR1 lists a limiting speed of 1,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV25?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV25-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV25",
      "NATV25"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV25-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV25-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 20.2,
    "static_load_kN": 44.5,
    "fatigue_load_limit_kN": 6.3,
    "limiting_speed_rpm": 1000,
    "max_rpm": 1000,
    "weight_g": 281,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 20.2 kN and C0 44.5 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.45 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6.3 kN at 25 mm bore, equivalent to 0.81 kN of dynamic rating per millimetre — the limiting speed is 1,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.81 kN per millimetre of rolling-element complement mass is 281 g, or 0.22 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam the 25 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 52 mm envelope for maximum C0 44.5 kN, guided axially by the outer-ring ribs Without a cage the NATV trades speed for static capacity — the limiting speed is 1,000 r/min, with C 20.2 kN and C0 44.5 kN The PP seals make this a maintenance-free unit: the 20.2 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 52 mm track diameter and 20.2 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 25 mm seat, and in woodworking machine feed tracks the 281 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 25 mm width and the published 44.5 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV25-PP?",
        "a": "The NATV25-PP is a NATV full-complement yoke-type track roller with axial guidance with 52 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×52×25 mm. Mass is 281 g."
      },
      {
        "q": "What does the NATV25-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV25-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×52×25 mm and the catalogue ratings are C 20.2 kN, C0 44.5 kN, Cur 6.3 kN."
      },
      {
        "q": "What is the load capacity of the NATV25-PP?",
        "a": "The basic dynamic load rating C is 20.2 kN and the basic static load rating C0 is 44.5 kN; the fatigue load limit Cur is 6.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV25-PP?",
        "a": "HR1 lists a limiting speed of 1,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV25-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV25",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV25-PP",
      "NATV25-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR30",
    "brand": "FAG",
    "manufacturer_designation": "NATR30",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.2,
    "static_load_kN": 39.5,
    "fatigue_load_limit_kN": 5.3,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 470,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×29 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 23.2 kN and C0 39.5 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.3 kN at 30 mm bore, equivalent to 0.77 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 0.80 kN per millimetre of rolling-element complement mass is 470 g, or 0.26 g per mm² of the 62×29 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 30 mm pin bore the 29 mm width and 23.2 kN C rating suit high-cycle industrial machinery rather than instrument duty Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the open execution is relubricated through the inner ring or pin At 30 mm bore and 470 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 62 mm track diameter and 23.2 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 30 mm seat, and in woodworking machine feed tracks the 470 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 29 mm width and the published 39.5 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR30?",
        "a": "The NATR30 is a NATR yoke-type track roller with cage and axial guidance with 62 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×62×29 mm. Mass is 470 g."
      },
      {
        "q": "What does the NATR30 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR30 identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×62×29 mm and the catalogue ratings are C 23.2 kN, C0 39.5 kN, Cur 5.3 kN."
      },
      {
        "q": "What is the load capacity of the NATR30?",
        "a": "The basic dynamic load rating C is 23.2 kN and the basic static load rating C0 is 39.5 kN; the fatigue load limit Cur is 5.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR30?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR30?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR30-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR30",
      "NATR30"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR30-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR30-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.2,
    "static_load_kN": 39.5,
    "fatigue_load_limit_kN": 5.3,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 444,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×29 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 23.2 kN and C0 39.5 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.59 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.3 kN at 30 mm bore, equivalent to 0.77 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 0.80 kN per millimetre of rolling-element complement mass is 444 g, or 0.25 g per mm² of the 62×29 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The cage can be damaged by heavy shock loads even though the rollers would survive — size to C, not just envelope NATR is the caged yoke-type track roller: a needle roller and cage assembly runs inside the rib-guided thick-walled outer ring on the 30 mm inner-ring bore The PP seals make this a maintenance-free unit: the 23.2 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 62 mm track diameter and 23.2 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 30 mm seat, and in automotive welding jig rollers the 444 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 29 mm width and the published 39.5 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR30-PP?",
        "a": "The NATR30-PP is a NATR yoke-type track roller with cage and axial guidance with 62 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×62×29 mm. Mass is 444 g."
      },
      {
        "q": "What does the NATR30-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR30-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×62×29 mm and the catalogue ratings are C 23.2 kN, C0 39.5 kN, Cur 5.3 kN."
      },
      {
        "q": "What is the load capacity of the NATR30-PP?",
        "a": "The basic dynamic load rating C is 23.2 kN and the basic static load rating C0 is 39.5 kN; the fatigue load limit Cur is 5.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR30-PP?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR30-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR30",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR30-PP",
      "NATR30-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV30",
    "brand": "FAG",
    "manufacturer_designation": "NATV30",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 30,
    "static_load_kN": 63,
    "fatigue_load_limit_kN": 9,
    "limiting_speed_rpm": 850,
    "max_rpm": 850,
    "weight_g": 481,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×29 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 30 kN and C0 63 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.48 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 9 kN at 30 mm bore, equivalent to 1.00 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.03 kN per millimetre of rolling-element complement mass is 481 g, or 0.27 g per mm² of the 62×29 mm track envelope — inertia that the drive must accelerate on every index of the cam at 30 mm pin bore this size balances the 62 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range At 30 mm bore and 481 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 62 mm track diameter and 30 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 30 mm seat, and in automotive welding jig rollers the 481 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 29 mm width and the published 63 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 62 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV30?",
        "a": "The NATV30 is a NATV full-complement yoke-type track roller with axial guidance with 62 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×62×29 mm. Mass is 481 g."
      },
      {
        "q": "What does the NATV30 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV30 identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×62×29 mm and the catalogue ratings are C 30 kN, C0 63 kN, Cur 9 kN."
      },
      {
        "q": "What is the load capacity of the NATV30?",
        "a": "The basic dynamic load rating C is 30 kN and the basic static load rating C0 is 63 kN; the fatigue load limit Cur is 9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV30?",
        "a": "HR1 lists a limiting speed of 850 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV30?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV30-PP",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV30",
      "NATV30"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV30-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV30-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 30,
    "static_load_kN": 63,
    "fatigue_load_limit_kN": 9,
    "limiting_speed_rpm": 850,
    "max_rpm": 850,
    "weight_g": 468,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×29 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 30 kN and C0 63 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.48 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 9 kN at 30 mm bore, equivalent to 1.00 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.03 kN per millimetre of rolling-element complement mass is 468 g, or 0.26 g per mm² of the 62×29 mm track envelope — inertia that the drive must accelerate on every index of the cam at 30 mm pin bore this size balances the 62 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range Without a cage the NATV trades speed for static capacity — the limiting speed is 850 r/min, with C 30 kN and C0 63 kN The -PP suffix fits contact lip seals on both sides, retaining the factory grease and excluding water and dust; seal friction is reflected in the 850 r/min limiting speed. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 62 mm track diameter and 30 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 30 mm seat, and in automotive welding jig rollers the 468 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 29 mm width and the published 63 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV30-PP?",
        "a": "The NATV30-PP is a NATV full-complement yoke-type track roller with axial guidance with 62 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×62×29 mm. Mass is 468 g."
      },
      {
        "q": "What does the NATV30-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV30-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×62×29 mm and the catalogue ratings are C 30 kN, C0 63 kN, Cur 9 kN."
      },
      {
        "q": "What is the load capacity of the NATV30-PP?",
        "a": "The basic dynamic load rating C is 30 kN and the basic static load rating C0 is 63 kN; the fatigue load limit Cur is 9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV30-PP?",
        "a": "HR1 lists a limiting speed of 850 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV30-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV30",
        "equiv_brand": "FAG",
        "level": "partial",
        "note": "Same envelope and mounting; open vs -PP sealed execution — the three-stage seal excludes contamination at the cost of a small drag torque and lower limiting speed."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV30-PP",
      "NATV30-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR35-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR35-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 24.8,
    "static_load_kN": 45,
    "fatigue_load_limit_kN": 6,
    "limiting_speed_rpm": 1000,
    "max_rpm": 1000,
    "weight_g": 547,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×72×29 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 24.8 kN and C0 45 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.55 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 6 kN at 35 mm bore, equivalent to 0.71 kN of dynamic rating per millimetre — the limiting speed is 1,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 0.86 kN per millimetre of rolling-element complement mass is 547 g, or 0.26 g per mm² of the 72×29 mm track envelope — inertia that the drive must accelerate on every index of the cam 35 mm pin bore marks the medium range: mounting forces and fits become critical, and the 547 g mass calls for proper induction or press tooling rather than hand fitting At 35 mm bore and 547 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load NATR is the caged yoke-type track roller: a needle roller and cage assembly runs inside the rib-guided thick-walled outer ring on the 35 mm inner-ring bore -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 29 mm width. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 72 mm track diameter and 24.8 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 35 mm seat, and in automotive welding jig rollers the 547 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 29 mm width and the published 45 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR35-PP?",
        "a": "The NATR35-PP is a NATR yoke-type track roller with cage and axial guidance with 72 mm outside diameter, 35 mm bore and 29 mm width, envelope 35×72×29 mm. Mass is 547 g."
      },
      {
        "q": "What does the NATR35-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR35-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 35×72×29 mm and the catalogue ratings are C 24.8 kN, C0 45 kN, Cur 6 kN."
      },
      {
        "q": "What is the load capacity of the NATR35-PP?",
        "a": "The basic dynamic load rating C is 24.8 kN and the basic static load rating C0 is 45 kN; the fatigue load limit Cur is 6 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR35-PP?",
        "a": "HR1 lists a limiting speed of 1,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR35-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR35",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR35-PP",
      "NATR35-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV35-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV35-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 32.5,
    "static_load_kN": 72,
    "fatigue_load_limit_kN": 10.3,
    "limiting_speed_rpm": 750,
    "max_rpm": 750,
    "weight_g": 630,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×72×29 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 32.5 kN and C0 72 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.45 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 10.3 kN at 35 mm bore, equivalent to 0.93 kN of dynamic rating per millimetre — the limiting speed is 750 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.12 kN per millimetre of rolling-element complement mass is 630 g, or 0.30 g per mm² of the 72×29 mm track envelope — inertia that the drive must accelerate on every index of the cam the 35 mm pin bore places this bearing in the medium band, where the 72 mm envelope already carries ratings in the tens of kilonewtons NATV is the full-complement yoke-type track roller: cageless needle rollers pack the 72 mm envelope for maximum C0 72 kN, guided axially by the outer-ring ribs The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 29 mm width covers most standard cam geometries -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 29 mm width. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 72 mm track diameter and 32.5 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 35 mm seat, and in automotive welding jig rollers the 630 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 29 mm width and the published 72 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV35-PP?",
        "a": "The NATV35-PP is a NATV full-complement yoke-type track roller with axial guidance with 72 mm outside diameter, 35 mm bore and 29 mm width, envelope 35×72×29 mm. Mass is 630 g."
      },
      {
        "q": "What does the NATV35-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV35-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 35×72×29 mm and the catalogue ratings are C 32.5 kN, C0 72 kN, Cur 10.3 kN."
      },
      {
        "q": "What is the load capacity of the NATV35-PP?",
        "a": "The basic dynamic load rating C is 32.5 kN and the basic static load rating C0 is 72 kN; the fatigue load limit Cur is 10.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV35-PP?",
        "a": "HR1 lists a limiting speed of 750 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV35-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV35",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV35-PP",
      "NATV35-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR40-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR40-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 32,
    "static_load_kN": 59,
    "fatigue_load_limit_kN": 8.4,
    "limiting_speed_rpm": 850,
    "max_rpm": 850,
    "weight_g": 795,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×80×32 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 32 kN and C0 59 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.54 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.4 kN at 40 mm bore, equivalent to 0.80 kN of dynamic rating per millimetre — the limiting speed is 850 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.00 kN per millimetre of rolling-element complement mass is 795 g, or 0.31 g per mm² of the 80×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 40 mm pin bore places this bearing in the medium band, where the 80 mm envelope already carries ratings in the tens of kilonewtons At 40 mm bore and 795 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load -PP protection suits cams and rails that are washed down or run in dust; exceeding the 850 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 80 mm track diameter and 32 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 40 mm seat, and in cam drives and indexing tables the 795 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 32 mm width and the published 59 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 80 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR40-PP?",
        "a": "The NATR40-PP is a NATR yoke-type track roller with cage and axial guidance with 80 mm outside diameter, 40 mm bore and 32 mm width, envelope 40×80×32 mm. Mass is 795 g."
      },
      {
        "q": "What does the NATR40-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR40-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 40×80×32 mm and the catalogue ratings are C 32 kN, C0 59 kN, Cur 8.4 kN."
      },
      {
        "q": "What is the load capacity of the NATR40-PP?",
        "a": "The basic dynamic load rating C is 32 kN and the basic static load rating C0 is 59 kN; the fatigue load limit Cur is 8.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR40-PP?",
        "a": "HR1 lists a limiting speed of 850 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR40-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR40",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR40-PP",
      "NATR40-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV40-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV40-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 40,
    "static_load_kN": 89,
    "fatigue_load_limit_kN": 13.2,
    "limiting_speed_rpm": 650,
    "max_rpm": 650,
    "weight_g": 832,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×80×32 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 40 kN and C0 89 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.45 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 13.2 kN at 40 mm bore, equivalent to 1.00 kN of dynamic rating per millimetre — the limiting speed is 650 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.25 kN per millimetre of rolling-element complement mass is 832 g, or 0.33 g per mm² of the 80×32 mm track envelope — inertia that the drive must accelerate on every index of the cam at 40 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 32 mm width as a standard mounting space The cageless rollers can brinell on very short oscillating strokes — the motion must rotate the full pack, not just rock it At 40 mm bore and 832 g the roller mounts on a standard pin; yoke mounting means the pin, not a stud, carries the clamp load Reading -PP: rubbing seals at each face of the 80 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 80 mm track diameter and 40 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 40 mm seat, and in cam drives and indexing tables the 832 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 32 mm width and the published 89 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV40-PP?",
        "a": "The NATV40-PP is a NATV full-complement yoke-type track roller with axial guidance with 80 mm outside diameter, 40 mm bore and 32 mm width, envelope 40×80×32 mm. Mass is 832 g."
      },
      {
        "q": "What does the NATV40-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV40-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 40×80×32 mm and the catalogue ratings are C 40 kN, C0 89 kN, Cur 13.2 kN."
      },
      {
        "q": "What is the load capacity of the NATV40-PP?",
        "a": "The basic dynamic load rating C is 40 kN and the basic static load rating C0 is 89 kN; the fatigue load limit Cur is 13.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV40-PP?",
        "a": "HR1 lists a limiting speed of 650 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV40-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV40",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV40-PP",
      "NATV40-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATR50-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATR50-PP",
    "series": "natr-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 31,
    "static_load_kN": 60,
    "fatigue_load_limit_kN": 8.5,
    "limiting_speed_rpm": 650,
    "max_rpm": 650,
    "weight_g": 867,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×90×32 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 31 kN and C0 60 kN for the NATR yoke-type track roller with cage and axial guidance; the C/C0 ratio of 0.52 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.5 kN at 50 mm bore, equivalent to 0.62 kN of dynamic rating per millimetre — the limiting speed is 650 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 0.97 kN per millimetre of rolling-element complement mass is 867 g, or 0.30 g per mm² of the 90×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 50 mm pin bore places this bearing in the medium band, where the 90 mm envelope already carries ratings in the tens of kilonewtons The outer-ring ribs give axial guidance, so the roller tolerates light thrust from skewed tracks without external flanges; the 32 mm width covers most standard cam geometries Reading -PP: rubbing seals at each face of the 90 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 90 mm track diameter and 31 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 50 mm seat, and in woodworking machine feed tracks the 867 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 32 mm width and the published 60 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 90 mm outer ring does.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 90 mm outer ring does.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR50-PP?",
        "a": "The NATR50-PP is a NATR yoke-type track roller with cage and axial guidance with 90 mm outside diameter, 50 mm bore and 32 mm width, envelope 50×90×32 mm. Mass is 867 g."
      },
      {
        "q": "What does the NATR50-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATR50-PP identifies this NATR yoke-type track roller with cage and axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 50×90×32 mm and the catalogue ratings are C 31 kN, C0 60 kN, Cur 8.5 kN."
      },
      {
        "q": "What is the load capacity of the NATR50-PP?",
        "a": "The basic dynamic load rating C is 31 kN and the basic static load rating C0 is 60 kN; the fatigue load limit Cur is 8.5 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATR50-PP?",
        "a": "HR1 lists a limiting speed of 650 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATR50-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR50",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR50-PP",
      "NATR50-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NATV50-PP",
    "brand": "FAG",
    "manufacturer_designation": "NATV50-PP",
    "series": "natv-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 39,
    "static_load_kN": 93,
    "fatigue_load_limit_kN": 13.8,
    "limiting_speed_rpm": 550,
    "max_rpm": 550,
    "weight_g": 969,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×90×32 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 39 kN and C0 93 kN for the NATV full-complement yoke-type track roller with axial guidance; the C/C0 ratio of 0.42 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 13.8 kN at 50 mm bore, equivalent to 0.78 kN of dynamic rating per millimetre — the limiting speed is 550 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.22 kN per millimetre of rolling-element complement mass is 969 g, or 0.34 g per mm² of the 90×32 mm track envelope — inertia that the drive must accelerate on every index of the cam at 50 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 32 mm width as a standard mounting space The crowned outside surface of the 90 mm outer ring spreads contact stress when the cam track departs slightly from parallel, reducing edge loading Reading NATR/NATV: yoke rollers with inner ring and integral axial guidance; the PP suffix adds lip seals on both sides and a life-long grease fill Reading -PP: rubbing seals at each face of the 90 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 90 mm track diameter and 39 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 50 mm seat, and in woodworking machine feed tracks the 969 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 32 mm width and the published 93 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV50-PP?",
        "a": "The NATV50-PP is a NATV full-complement yoke-type track roller with axial guidance with 90 mm outside diameter, 50 mm bore and 32 mm width, envelope 50×90×32 mm. Mass is 969 g."
      },
      {
        "q": "What does the NATV50-PP designation mean in the FAG/INA HR1 catalogue?",
        "a": "NATV50-PP identifies this NATV full-complement yoke-type track roller with axial guidance in the Schaeffler HR1 rolling bearings catalogue. The envelope is 50×90×32 mm and the catalogue ratings are C 39 kN, C0 93 kN, Cur 13.8 kN."
      },
      {
        "q": "What is the load capacity of the NATV50-PP?",
        "a": "The basic dynamic load rating C is 39 kN and the basic static load rating C0 is 93 kN; the fatigue load limit Cur is 13.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NATV50-PP?",
        "a": "HR1 lists a limiting speed of 550 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NATV50-PP?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV50",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1450",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV50-PP",
      "NATV50-PP"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR15",
    "brand": "FAG",
    "manufacturer_designation": "NUTR15",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 15.3,
    "static_load_kN": 19,
    "fatigue_load_limit_kN": 2.48,
    "limiting_speed_rpm": 6500,
    "max_rpm": 6500,
    "weight_g": 99,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×19 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 15.3 kN and C0 19 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.81 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.48 kN at 15 mm bore, equivalent to 1.02 kN of dynamic rating per millimetre — the limiting speed is 6,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.81 kN per millimetre of rolling-element complement mass is 99 g, or 0.15 g per mm² of the 35×19 mm track envelope — inertia that the drive must accelerate on every index of the cam the 15 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Two roller rows across the 19 mm width provide C 15.3 kN and C0 19 kN, with the thick outer ring profiled to tolerate track misalignment The 15 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 19 kN static rating Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 35 mm track diameter and 15.3 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 15 mm seat, and in linear rail and profile track guidance the 99 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 19 mm width and the published 19 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 35 mm outer ring does.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR15?",
        "a": "The NUTR15 is a NUTR double-row full-complement yoke-type track roller with 35 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×35×19 mm. Mass is 99 g."
      },
      {
        "q": "What does the NUTR15 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR15 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×35×19 mm and the catalogue ratings are C 15.3 kN, C0 19 kN, Cur 2.48 kN."
      },
      {
        "q": "What is the load capacity of the NUTR15?",
        "a": "The basic dynamic load rating C is 15.3 kN and the basic static load rating C0 is 19 kN; the fatigue load limit Cur is 2.48 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR15?",
        "a": "HR1 lists a limiting speed of 6,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR15?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR15",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR15",
      "NUTR15"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR15-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR15-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 12.6,
    "static_load_kN": 14.9,
    "fatigue_load_limit_kN": 1.79,
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000,
    "weight_g": 99,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×35×19 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 12.6 kN and C0 14.9 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.85 reflects a rolling-element pack sized for heavy static track loading, and the 10.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.79 kN at 15 mm bore, equivalent to 0.84 kN of dynamic rating per millimetre — the limiting speed is 6,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.66 kN per millimetre of rolling-element complement mass is 99 g, or 0.15 g per mm² of the 35×19 mm track envelope — inertia that the drive must accelerate on every index of the cam the 15 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 6,000 r/min The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 12.6 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 35 mm outer ring. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 35 mm track diameter and 12.6 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 15 mm seat, and in packaging machine timing mechanisms the 99 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 19 mm width and the published 14.9 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR15-2RS-XL?",
        "a": "The PWTR15-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 35 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×35×19 mm. Mass is 99 g."
      },
      {
        "q": "What does the PWTR15-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR15-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 15×35×19 mm and the catalogue ratings are C 12.6 kN, C0 14.9 kN, Cur 1.79 kN."
      },
      {
        "q": "What is the load capacity of the PWTR15-2RS-XL?",
        "a": "The basic dynamic load rating C is 12.6 kN and the basic static load rating C0 is 14.9 kN; the fatigue load limit Cur is 1.79 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR15-2RS-XL?",
        "a": "HR1 lists a limiting speed of 6,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR15-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 35 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR15",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR15-2RS-XL",
      "PWTR15-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR17",
    "brand": "FAG",
    "manufacturer_designation": "NUTR17",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 18.8,
    "static_load_kN": 25.5,
    "fatigue_load_limit_kN": 3.25,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 147,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×21 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 18.8 kN and C0 25.5 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.74 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.25 kN at 17 mm bore, equivalent to 1.11 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 0.90 kN per millimetre of rolling-element complement mass is 147 g, or 0.17 g per mm² of the 40×21 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 17 mm pin bore the 21 mm width and 18.8 kN C rating suit high-cycle industrial machinery rather than instrument duty No thermal reference speed is published — the 5,500 r/min limiting speed is the design ceiling, set by roller and seal kinematics Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 40 mm track diameter and 18.8 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 17 mm seat, and in automotive welding jig rollers the 147 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 21 mm width and the published 25.5 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 40 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR17?",
        "a": "The NUTR17 is a NUTR double-row full-complement yoke-type track roller with 40 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×40×21 mm. Mass is 147 g."
      },
      {
        "q": "What does the NUTR17 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR17 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×40×21 mm and the catalogue ratings are C 18.8 kN, C0 25.5 kN, Cur 3.25 kN."
      },
      {
        "q": "What is the load capacity of the NUTR17?",
        "a": "The basic dynamic load rating C is 18.8 kN and the basic static load rating C0 is 25.5 kN; the fatigue load limit Cur is 3.25 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR17?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR17?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR17",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR17",
      "NUTR17"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR17-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR17-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 14.3,
    "static_load_kN": 18.2,
    "fatigue_load_limit_kN": 2.2,
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000,
    "weight_g": 147,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×40×21 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 14.3 kN and C0 18.2 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.79 reflects a rolling-element pack sized for heavy static track loading, and the 11.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.2 kN at 17 mm bore, equivalent to 0.84 kN of dynamic rating per millimetre — the limiting speed is 5,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 0.68 kN per millimetre of rolling-element complement mass is 147 g, or 0.17 g per mm² of the 40×21 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 17 mm pin bore the 21 mm width and 14.3 kN C rating suit high-cycle industrial machinery rather than instrument duty PWTR is the sealed double-row full-complement yoke roller: two cylindrical roller rows, 2RS contact seals both sides and the profiled (crowned) running surface on the 40 mm outer ring The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 5,000 r/min limit. The sealed 2RS execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 40 mm track diameter and 14.3 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 17 mm seat, and in automatic assembly machine carriages the 147 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 21 mm width and the published 18.2 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR17-2RS-XL?",
        "a": "The PWTR17-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 40 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×40×21 mm. Mass is 147 g."
      },
      {
        "q": "What does the PWTR17-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR17-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 17×40×21 mm and the catalogue ratings are C 14.3 kN, C0 18.2 kN, Cur 2.2 kN."
      },
      {
        "q": "What is the load capacity of the PWTR17-2RS-XL?",
        "a": "The basic dynamic load rating C is 14.3 kN and the basic static load rating C0 is 18.2 kN; the fatigue load limit Cur is 2.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR17-2RS-XL?",
        "a": "HR1 lists a limiting speed of 5,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR17-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 40 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR17",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR17-2RS-XL",
      "PWTR17-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR1542",
    "brand": "FAG",
    "manufacturer_designation": "NUTR1542",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 42,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 18.3,
    "static_load_kN": 24.7,
    "fatigue_load_limit_kN": 3.15,
    "limiting_speed_rpm": 6500,
    "max_rpm": 6500,
    "weight_g": 158,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×42×19 mm: the 42 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 18.3 kN and C0 24.7 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.74 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.15 kN at 15 mm bore, equivalent to 1.22 kN of dynamic rating per millimetre — the limiting speed is 6,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.96 kN per millimetre of rolling-element complement mass is 158 g, or 0.20 g per mm² of the 42×19 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 15 mm pin bore the 19 mm width and 18.3 kN C rating suit high-cycle industrial machinery rather than instrument duty NUTR is the double-row full-complement yoke roller: two cylindrical roller rows give the highest radial capacity in the 42 mm track-roller envelope, open and relubricatable At 158 g the double-row roller has substantial inertia; the cam drive must accelerate that mass, and a misaligned track concentrates load onto one row Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 42 mm track diameter and 18.3 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 15 mm seat, and in woodworking machine feed tracks the 158 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 19 mm width and the published 24.7 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR1542?",
        "a": "The NUTR1542 is a NUTR double-row full-complement yoke-type track roller with 42 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×42×19 mm. Mass is 158 g."
      },
      {
        "q": "What does the NUTR1542 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR1542 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 15×42×19 mm and the catalogue ratings are C 18.3 kN, C0 24.7 kN, Cur 3.15 kN."
      },
      {
        "q": "What is the load capacity of the NUTR1542?",
        "a": "The basic dynamic load rating C is 18.3 kN and the basic static load rating C0 is 24.7 kN; the fatigue load limit Cur is 3.15 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR1542?",
        "a": "HR1 lists a limiting speed of 6,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR1542?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 42 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR1542",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR1542",
      "NUTR1542"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR1542-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR1542-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 42,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 14.7,
    "static_load_kN": 16.2,
    "fatigue_load_limit_kN": 2.18,
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000,
    "weight_g": 158,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 15×42×19 mm: the 42 mm outside diameter is the track-running surface — a thick-walled outer ring over a 15 mm bore — and the 19 mm width sets the contact width on the mating track the catalogue lists C 14.7 kN and C0 16.2 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.91 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.18 kN at 15 mm bore, equivalent to 0.98 kN of dynamic rating per millimetre — the limiting speed is 6,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 15 mm bore takes the mounting pin or shaft; across the 19 mm contact width the dynamic rating works out to 0.77 kN per millimetre of rolling-element complement mass is 158 g, or 0.20 g per mm² of the 42×19 mm track envelope — inertia that the drive must accelerate on every index of the cam the 15 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The 15 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 16.2 kN static rating Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 6,000 r/min X-life status (-XL) indicates the current Schaeffler premium execution at 15 mm bore; the 16.2 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 15 mm-bore unit greased for life. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 42 mm track diameter and 14.7 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 15 mm seat, and in robotic arm linear axes the 158 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 19 mm width and the published 16.2 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR1542-2RS-XL?",
        "a": "The PWTR1542-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 42 mm outside diameter, 15 mm bore and 19 mm width, envelope 15×42×19 mm. Mass is 158 g."
      },
      {
        "q": "What does the PWTR1542-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR1542-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 15×42×19 mm and the catalogue ratings are C 14.7 kN, C0 16.2 kN, Cur 2.18 kN."
      },
      {
        "q": "What is the load capacity of the PWTR1542-2RS-XL?",
        "a": "The basic dynamic load rating C is 14.7 kN and the basic static load rating C0 is 16.2 kN; the fatigue load limit Cur is 2.18 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR1542-2RS-XL?",
        "a": "HR1 lists a limiting speed of 6,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR1542-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 42 mm outer surface tolerates only small angular error. The inner ring lets the 15 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR1542",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR1542-2RS-XL",
      "PWTR1542-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR1747",
    "brand": "FAG",
    "manufacturer_designation": "NUTR1747",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 47,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 21.6,
    "static_load_kN": 31,
    "fatigue_load_limit_kN": 3.9,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 220,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×47×21 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 21.6 kN and C0 31 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.70 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.9 kN at 17 mm bore, equivalent to 1.27 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 1.03 kN per millimetre of rolling-element complement mass is 220 g, or 0.22 g per mm² of the 47×21 mm track envelope — inertia that the drive must accelerate on every index of the cam at 17 mm pin bore this size balances the 47 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The 17 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 31 kN static rating No thermal reference speed is published — the 5,500 r/min limiting speed is the design ceiling, set by roller and seal kinematics Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 47 mm track diameter and 21.6 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 17 mm seat, and in linear rail and profile track guidance the 220 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 21 mm width and the published 31 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR1747?",
        "a": "The NUTR1747 is a NUTR double-row full-complement yoke-type track roller with 47 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×47×21 mm. Mass is 220 g."
      },
      {
        "q": "What does the NUTR1747 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR1747 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 17×47×21 mm and the catalogue ratings are C 21.6 kN, C0 31 kN, Cur 3.9 kN."
      },
      {
        "q": "What is the load capacity of the NUTR1747?",
        "a": "The basic dynamic load rating C is 21.6 kN and the basic static load rating C0 is 31 kN; the fatigue load limit Cur is 3.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR1747?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR1747?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR1747",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR1747",
      "NUTR1747"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR1747-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR1747-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 47,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 15.9,
    "static_load_kN": 18.4,
    "fatigue_load_limit_kN": 2.48,
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000,
    "weight_g": 220,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 17×47×21 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 17 mm bore — and the 21 mm width sets the contact width on the mating track the catalogue lists C 15.9 kN and C0 18.4 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.86 reflects a rolling-element pack sized for heavy static track loading, and the 15.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.48 kN at 17 mm bore, equivalent to 0.94 kN of dynamic rating per millimetre — the limiting speed is 5,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 17 mm bore takes the mounting pin or shaft; across the 21 mm contact width the dynamic rating works out to 0.76 kN per millimetre of rolling-element complement mass is 220 g, or 0.22 g per mm² of the 47×21 mm track envelope — inertia that the drive must accelerate on every index of the cam the 17 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The 17 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 18.4 kN static rating Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 5,000 r/min -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 15.9 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 47 mm outer ring. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 47 mm track diameter and 15.9 kN dynamic rating match the duty. In robotic arm linear axes the unit fits a compact 17 mm seat, and in agricultural and textile cam followers the 220 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 21 mm width and the published 18.4 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR1747-2RS-XL?",
        "a": "The PWTR1747-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 47 mm outside diameter, 17 mm bore and 21 mm width, envelope 17×47×21 mm. Mass is 220 g."
      },
      {
        "q": "What does the PWTR1747-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR1747-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 17×47×21 mm and the catalogue ratings are C 15.9 kN, C0 18.4 kN, Cur 2.48 kN."
      },
      {
        "q": "What is the load capacity of the PWTR1747-2RS-XL?",
        "a": "The basic dynamic load rating C is 15.9 kN and the basic static load rating C0 is 18.4 kN; the fatigue load limit Cur is 2.48 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR1747-2RS-XL?",
        "a": "HR1 lists a limiting speed of 5,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR1747-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 17 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR1747",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR1747-2RS-XL",
      "PWTR1747-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR20",
    "brand": "FAG",
    "manufacturer_designation": "NUTR20",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 28.5,
    "static_load_kN": 38,
    "fatigue_load_limit_kN": 4.95,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 245,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 28.5 kN and C0 38 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.75 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.95 kN at 20 mm bore, equivalent to 1.43 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.14 kN per millimetre of rolling-element complement mass is 245 g, or 0.21 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm pin bore the 25 mm width and 28.5 kN C rating suit high-cycle industrial machinery rather than instrument duty NUTR is the double-row full-complement yoke roller: two cylindrical roller rows give the highest radial capacity in the 47 mm track-roller envelope, open and relubricatable Two roller rows across the 25 mm width provide C 28.5 kN and C0 38 kN, with the thick outer ring profiled to tolerate track misalignment Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 47 mm track diameter and 28.5 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 20 mm seat, and in automatic assembly machine carriages the 245 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 25 mm width and the published 38 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 47 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR20?",
        "a": "The NUTR20 is a NUTR double-row full-complement yoke-type track roller with 47 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×47×25 mm. Mass is 245 g."
      },
      {
        "q": "What does the NUTR20 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR20 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×25 mm and the catalogue ratings are C 28.5 kN, C0 38 kN, Cur 4.95 kN."
      },
      {
        "q": "What is the load capacity of the NUTR20?",
        "a": "The basic dynamic load rating C is 28.5 kN and the basic static load rating C0 is 38 kN; the fatigue load limit Cur is 4.95 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR20?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR20?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR20",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR20",
      "NUTR20"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR20-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR20-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 24.6,
    "static_load_kN": 31,
    "fatigue_load_limit_kN": 3.8,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 245,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×25 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 24.6 kN and C0 31 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.79 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.8 kN at 20 mm bore, equivalent to 1.23 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 0.98 kN per millimetre of rolling-element complement mass is 245 g, or 0.21 g per mm² of the 47×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm pin bore the 25 mm width and 24.6 kN C rating suit high-cycle industrial machinery rather than instrument duty The 20 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 31 kN static rating As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 3.8 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 3,800 r/min. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 47 mm track diameter and 24.6 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 20 mm seat, and in robotic arm linear axes the 245 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 25 mm width and the published 31 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR20-2RS-XL?",
        "a": "The PWTR20-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 47 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×47×25 mm. Mass is 245 g."
      },
      {
        "q": "What does the PWTR20-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR20-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 20×47×25 mm and the catalogue ratings are C 24.6 kN, C0 31 kN, Cur 3.8 kN."
      },
      {
        "q": "What is the load capacity of the PWTR20-2RS-XL?",
        "a": "The basic dynamic load rating C is 24.6 kN and the basic static load rating C0 is 31 kN; the fatigue load limit Cur is 3.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR20-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR20-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 47 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR20",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR20-2RS-XL",
      "PWTR20-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR2052",
    "brand": "FAG",
    "manufacturer_designation": "NUTR2052",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 31.5,
    "static_load_kN": 44.5,
    "fatigue_load_limit_kN": 5.8,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 321,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 31.5 kN and C0 44.5 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.8 kN at 20 mm bore, equivalent to 1.57 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.26 kN per millimetre of rolling-element complement mass is 321 g, or 0.25 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The open form is relubricated via the inner ring; follow the interval strictly because the packed roller rows trap contaminants Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 4,200 r/min Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 52 mm track diameter and 31.5 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 20 mm seat, and in robotic arm linear axes the 321 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 25 mm width and the published 44.5 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR2052?",
        "a": "The NUTR2052 is a NUTR double-row full-complement yoke-type track roller with 52 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×52×25 mm. Mass is 321 g."
      },
      {
        "q": "What does the NUTR2052 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR2052 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×52×25 mm and the catalogue ratings are C 31.5 kN, C0 44.5 kN, Cur 5.8 kN."
      },
      {
        "q": "What is the load capacity of the NUTR2052?",
        "a": "The basic dynamic load rating C is 31.5 kN and the basic static load rating C0 is 44.5 kN; the fatigue load limit Cur is 5.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR2052?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR2052?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR2052",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR2052",
      "NUTR2052"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR2052-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR2052-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 27,
    "static_load_kN": 35.5,
    "fatigue_load_limit_kN": 4.35,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 321,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 27 kN and C0 35.5 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.35 kN at 20 mm bore, equivalent to 1.35 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.08 kN per millimetre of rolling-element complement mass is 321 g, or 0.25 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm pin bore this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication No thermal reference speed is published — the 3,800 r/min limiting speed is the design ceiling, set by roller and seal kinematics -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 27 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 52 mm outer ring. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 52 mm track diameter and 27 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 20 mm seat, and in packaging machine timing mechanisms the 321 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 25 mm width and the published 35.5 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 52 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR2052-2RS-XL?",
        "a": "The PWTR2052-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 52 mm outside diameter, 20 mm bore and 25 mm width, envelope 20×52×25 mm. Mass is 321 g."
      },
      {
        "q": "What does the PWTR2052-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR2052-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 20×52×25 mm and the catalogue ratings are C 27 kN, C0 35.5 kN, Cur 4.35 kN."
      },
      {
        "q": "What is the load capacity of the PWTR2052-2RS-XL?",
        "a": "The basic dynamic load rating C is 27 kN and the basic static load rating C0 is 35.5 kN; the fatigue load limit Cur is 4.35 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR2052-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR2052-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 20 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR2052",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR2052-2RS-XL",
      "PWTR2052-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR25",
    "brand": "FAG",
    "manufacturer_designation": "NUTR25",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 29.5,
    "static_load_kN": 41.5,
    "fatigue_load_limit_kN": 5.4,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 281,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 29.5 kN and C0 41.5 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.4 kN at 25 mm bore, equivalent to 1.18 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.18 kN per millimetre of rolling-element complement mass is 281 g, or 0.22 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam at 25 mm pin bore this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range Two roller rows across the 25 mm width provide C 29.5 kN and C0 41.5 kN, with the thick outer ring profiled to tolerate track misalignment Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 4,200 r/min Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 52 mm track diameter and 29.5 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 25 mm seat, and in packaging machine timing mechanisms the 281 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 25 mm width and the published 41.5 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 52 mm outer ring does.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 52 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR25?",
        "a": "The NUTR25 is a NUTR double-row full-complement yoke-type track roller with 52 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×52×25 mm. Mass is 281 g."
      },
      {
        "q": "What does the NUTR25 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR25 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×52×25 mm and the catalogue ratings are C 29.5 kN, C0 41.5 kN, Cur 5.4 kN."
      },
      {
        "q": "What is the load capacity of the NUTR25?",
        "a": "The basic dynamic load rating C is 29.5 kN and the basic static load rating C0 is 41.5 kN; the fatigue load limit Cur is 5.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR25?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR25?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR25",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR25",
      "NUTR25"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR25-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR25-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 25.5,
    "static_load_kN": 33.5,
    "fatigue_load_limit_kN": 4.2,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 281,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×52×25 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 25.5 kN and C0 33.5 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.2 kN at 25 mm bore, equivalent to 1.02 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.02 kN per millimetre of rolling-element complement mass is 281 g, or 0.22 g per mm² of the 52×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 25 mm pin bore the 25 mm width and 25.5 kN C rating suit high-cycle industrial machinery rather than instrument duty The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication No thermal reference speed is published — the 3,800 r/min limiting speed is the design ceiling, set by roller and seal kinematics As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 4.2 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 3,800 r/min. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 52 mm track diameter and 25.5 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 25 mm seat, and in conveyor transfer and diverting stations the 281 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 25 mm width and the published 33.5 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 52 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR25-2RS-XL?",
        "a": "The PWTR25-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 52 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×52×25 mm. Mass is 281 g."
      },
      {
        "q": "What does the PWTR25-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR25-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 25×52×25 mm and the catalogue ratings are C 25.5 kN, C0 33.5 kN, Cur 4.2 kN."
      },
      {
        "q": "What is the load capacity of the PWTR25-2RS-XL?",
        "a": "The basic dynamic load rating C is 25.5 kN and the basic static load rating C0 is 33.5 kN; the fatigue load limit Cur is 4.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR25-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR25-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 52 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR25",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR25-2RS-XL",
      "PWTR25-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR2562",
    "brand": "FAG",
    "manufacturer_designation": "NUTR2562",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 62,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 35.5,
    "static_load_kN": 54,
    "fatigue_load_limit_kN": 7,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 450,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×62×25 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 35.5 kN and C0 54 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.66 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7 kN at 25 mm bore, equivalent to 1.42 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.42 kN per millimetre of rolling-element complement mass is 450 g, or 0.29 g per mm² of the 62×25 mm track envelope — inertia that the drive must accelerate on every index of the cam at 25 mm pin bore this size balances the 62 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range Two roller rows across the 25 mm width provide C 35.5 kN and C0 54 kN, with the thick outer ring profiled to tolerate track misalignment The open form is relubricated via the inner ring; follow the interval strictly because the packed roller rows trap contaminants Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 62 mm track diameter and 35.5 kN dynamic rating match the duty. In robotic arm linear axes the unit fits a compact 25 mm seat, and in agricultural and textile cam followers the 450 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 25 mm width and the published 54 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 62 mm outer ring does.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 62 mm outer ring does.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR2562?",
        "a": "The NUTR2562 is a NUTR double-row full-complement yoke-type track roller with 62 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×62×25 mm. Mass is 450 g."
      },
      {
        "q": "What does the NUTR2562 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR2562 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 25×62×25 mm and the catalogue ratings are C 35.5 kN, C0 54 kN, Cur 7 kN."
      },
      {
        "q": "What is the load capacity of the NUTR2562?",
        "a": "The basic dynamic load rating C is 35.5 kN and the basic static load rating C0 is 54 kN; the fatigue load limit Cur is 7 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR2562?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR2562?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR2562",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR2562",
      "NUTR2562"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR2562-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR2562-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 62,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 30,
    "static_load_kN": 42.5,
    "fatigue_load_limit_kN": 5.3,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 450,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 25×62×25 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 25 mm bore — and the 25 mm width sets the contact width on the mating track the catalogue lists C 30 kN and C0 42.5 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.3 kN at 25 mm bore, equivalent to 1.20 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 25 mm bore takes the mounting pin or shaft; across the 25 mm contact width the dynamic rating works out to 1.20 kN per millimetre of rolling-element complement mass is 450 g, or 0.29 g per mm² of the 62×25 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 25 mm pin bore the 25 mm width and 30 kN C rating suit high-cycle industrial machinery rather than instrument duty The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication The 25 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 42.5 kN static rating The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,800 r/min limit. The sealed 2RS execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 62 mm track diameter and 30 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 25 mm seat, and in linear rail and profile track guidance the 450 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 25 mm width and the published 42.5 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR2562-2RS-XL?",
        "a": "The PWTR2562-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 62 mm outside diameter, 25 mm bore and 25 mm width, envelope 25×62×25 mm. Mass is 450 g."
      },
      {
        "q": "What does the PWTR2562-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR2562-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 25×62×25 mm and the catalogue ratings are C 30 kN, C0 42.5 kN, Cur 5.3 kN."
      },
      {
        "q": "What is the load capacity of the PWTR2562-2RS-XL?",
        "a": "The basic dynamic load rating C is 30 kN and the basic static load rating C0 is 42.5 kN; the fatigue load limit Cur is 5.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR2562-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR2562-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 25 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR2562",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR2562-2RS-XL",
      "PWTR2562-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR30",
    "brand": "FAG",
    "manufacturer_designation": "NUTR30",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 40.5,
    "static_load_kN": 55,
    "fatigue_load_limit_kN": 7.4,
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600,
    "weight_g": 465,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×29 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 40.5 kN and C0 55 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.74 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.4 kN at 30 mm bore, equivalent to 1.35 kN of dynamic rating per millimetre — the limiting speed is 2,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.40 kN per millimetre of rolling-element complement mass is 465 g, or 0.26 g per mm² of the 62×29 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Two roller rows across the 29 mm width provide C 40.5 kN and C0 55 kN, with the thick outer ring profiled to tolerate track misalignment Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 2,600 r/min Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 62 mm track diameter and 40.5 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 30 mm seat, and in woodworking machine feed tracks the 465 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 29 mm width and the published 55 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 62 mm outer ring does.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 62 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR30?",
        "a": "The NUTR30 is a NUTR double-row full-complement yoke-type track roller with 62 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×62×29 mm. Mass is 465 g."
      },
      {
        "q": "What does the NUTR30 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR30 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×62×29 mm and the catalogue ratings are C 40.5 kN, C0 55 kN, Cur 7.4 kN."
      },
      {
        "q": "What is the load capacity of the NUTR30?",
        "a": "The basic dynamic load rating C is 40.5 kN and the basic static load rating C0 is 55 kN; the fatigue load limit Cur is 7.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR30?",
        "a": "HR1 lists a limiting speed of 2,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR30?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR30",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR30",
      "NUTR30"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR30-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR30-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 35,
    "static_load_kN": 46,
    "fatigue_load_limit_kN": 5.9,
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200,
    "weight_g": 465,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×62×29 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 35 kN and C0 46 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.9 kN at 30 mm bore, equivalent to 1.17 kN of dynamic rating per millimetre — the limiting speed is 2,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.21 kN per millimetre of rolling-element complement mass is 465 g, or 0.26 g per mm² of the 62×29 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty PWTR is the sealed double-row full-complement yoke roller: two cylindrical roller rows, 2RS contact seals both sides and the profiled (crowned) running surface on the 62 mm outer ring At 465 g the double-row roller has substantial inertia; the cam drive must accelerate that mass, and a misaligned track concentrates load onto one row As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 5.9 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 2,200 r/min. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 62 mm track diameter and 35 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 30 mm seat, and in printing press sheet-transfer grippers the 465 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 29 mm width and the published 46 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR30-2RS-XL?",
        "a": "The PWTR30-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 62 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×62×29 mm. Mass is 465 g."
      },
      {
        "q": "What does the PWTR30-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR30-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 30×62×29 mm and the catalogue ratings are C 35 kN, C0 46 kN, Cur 5.9 kN."
      },
      {
        "q": "What is the load capacity of the PWTR30-2RS-XL?",
        "a": "The basic dynamic load rating C is 35 kN and the basic static load rating C0 is 46 kN; the fatigue load limit Cur is 5.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR30-2RS-XL?",
        "a": "HR1 lists a limiting speed of 2,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR30-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 62 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR30",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1453",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR30-2RS-XL",
      "PWTR30-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR3072",
    "brand": "FAG",
    "manufacturer_designation": "NUTR3072",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 48,
    "static_load_kN": 71,
    "fatigue_load_limit_kN": 9.3,
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600,
    "weight_g": 697,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×72×29 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 48 kN and C0 71 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 21.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 9.3 kN at 30 mm bore, equivalent to 1.60 kN of dynamic rating per millimetre — the limiting speed is 2,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.66 kN per millimetre of rolling-element complement mass is 697 g, or 0.33 g per mm² of the 72×29 mm track envelope — inertia that the drive must accelerate on every index of the cam at 30 mm pin bore this size balances the 72 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range No thermal reference speed is published — the 2,600 r/min limiting speed is the design ceiling, set by roller and seal kinematics Two roller rows across the 29 mm width provide C 48 kN and C0 71 kN, with the thick outer ring profiled to tolerate track misalignment Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 72 mm track diameter and 48 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 30 mm seat, and in conveyor transfer and diverting stations the 697 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 29 mm width and the published 71 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR3072?",
        "a": "The NUTR3072 is a NUTR double-row full-complement yoke-type track roller with 72 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×72×29 mm. Mass is 697 g."
      },
      {
        "q": "What does the NUTR3072 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR3072 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×72×29 mm and the catalogue ratings are C 48 kN, C0 71 kN, Cur 9.3 kN."
      },
      {
        "q": "What is the load capacity of the NUTR3072?",
        "a": "The basic dynamic load rating C is 48 kN and the basic static load rating C0 is 71 kN; the fatigue load limit Cur is 9.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR3072?",
        "a": "HR1 lists a limiting speed of 2,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR3072?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR3072",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR3072",
      "NUTR3072"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR3072-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR3072-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 41,
    "static_load_kN": 56,
    "fatigue_load_limit_kN": 7.3,
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200,
    "weight_g": 697,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×72×29 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 41 kN and C0 56 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 21.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.3 kN at 30 mm bore, equivalent to 1.37 kN of dynamic rating per millimetre — the limiting speed is 2,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.41 kN per millimetre of rolling-element complement mass is 697 g, or 0.33 g per mm² of the 72×29 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm pin bore falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 2,200 r/min PWTR is the sealed double-row full-complement yoke roller: two cylindrical roller rows, 2RS contact seals both sides and the profiled (crowned) running surface on the 72 mm outer ring -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 41 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 72 mm outer ring. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 72 mm track diameter and 41 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 30 mm seat, and in printing press sheet-transfer grippers the 697 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 29 mm width and the published 56 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR3072-2RS-XL?",
        "a": "The PWTR3072-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 72 mm outside diameter, 30 mm bore and 29 mm width, envelope 30×72×29 mm. Mass is 697 g."
      },
      {
        "q": "What does the PWTR3072-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR3072-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 30×72×29 mm and the catalogue ratings are C 41 kN, C0 56 kN, Cur 7.3 kN."
      },
      {
        "q": "What is the load capacity of the PWTR3072-2RS-XL?",
        "a": "The basic dynamic load rating C is 41 kN and the basic static load rating C0 is 56 kN; the fatigue load limit Cur is 7.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR3072-2RS-XL?",
        "a": "HR1 lists a limiting speed of 2,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR3072-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 30 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR3072",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR3072-2RS-XL",
      "PWTR3072-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR35",
    "brand": "FAG",
    "manufacturer_designation": "NUTR35",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 45,
    "static_load_kN": 66,
    "fatigue_load_limit_kN": 8.9,
    "limiting_speed_rpm": 2100,
    "max_rpm": 2100,
    "weight_g": 630,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×72×29 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 45 kN and C0 66 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.9 kN at 35 mm bore, equivalent to 1.29 kN of dynamic rating per millimetre — the limiting speed is 2,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.55 kN per millimetre of rolling-element complement mass is 630 g, or 0.30 g per mm² of the 72×29 mm track envelope — inertia that the drive must accelerate on every index of the cam at 35 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 29 mm width as a standard mounting space No thermal reference speed is published — the 2,100 r/min limiting speed is the design ceiling, set by roller and seal kinematics Two roller rows across the 29 mm width provide C 45 kN and C0 66 kN, with the thick outer ring profiled to tolerate track misalignment Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 72 mm track diameter and 45 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 35 mm seat, and in automotive welding jig rollers the 630 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 29 mm width and the published 66 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 72 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR35?",
        "a": "The NUTR35 is a NUTR double-row full-complement yoke-type track roller with 72 mm outside diameter, 35 mm bore and 29 mm width, envelope 35×72×29 mm. Mass is 630 g."
      },
      {
        "q": "What does the NUTR35 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR35 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 35×72×29 mm and the catalogue ratings are C 45 kN, C0 66 kN, Cur 8.9 kN."
      },
      {
        "q": "What is the load capacity of the NUTR35?",
        "a": "The basic dynamic load rating C is 45 kN and the basic static load rating C0 is 66 kN; the fatigue load limit Cur is 8.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR35?",
        "a": "HR1 lists a limiting speed of 2,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR35?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR35",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR35",
      "NUTR35"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR35-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR35-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 39,
    "static_load_kN": 55,
    "fatigue_load_limit_kN": 7.1,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 630,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×72×29 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 39 kN and C0 55 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 18.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.1 kN at 35 mm bore, equivalent to 1.11 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.34 kN per millimetre of rolling-element complement mass is 630 g, or 0.30 g per mm² of the 72×29 mm track envelope — inertia that the drive must accelerate on every index of the cam the 35 mm pin bore places this bearing in the medium band, where the 72 mm envelope already carries ratings in the tens of kilonewtons At 630 g the double-row roller has substantial inertia; the cam drive must accelerate that mass, and a misaligned track concentrates load onto one row As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 7.1 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 1,800 r/min. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 72 mm track diameter and 39 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 35 mm seat, and in cam drives and indexing tables the 630 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 29 mm width and the published 55 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR35-2RS-XL?",
        "a": "The PWTR35-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 72 mm outside diameter, 35 mm bore and 29 mm width, envelope 35×72×29 mm. Mass is 630 g."
      },
      {
        "q": "What does the PWTR35-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR35-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 35×72×29 mm and the catalogue ratings are C 39 kN, C0 55 kN, Cur 7.1 kN."
      },
      {
        "q": "What is the load capacity of the PWTR35-2RS-XL?",
        "a": "The basic dynamic load rating C is 39 kN and the basic static load rating C0 is 55 kN; the fatigue load limit Cur is 7.1 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR35-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR35-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 72 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR35",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR35-2RS-XL",
      "PWTR35-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR3580",
    "brand": "FAG",
    "manufacturer_designation": "NUTR3580",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 80,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 51,
    "static_load_kN": 79,
    "fatigue_load_limit_kN": 10.5,
    "limiting_speed_rpm": 2100,
    "max_rpm": 2100,
    "weight_g": 836,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×80×29 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 51 kN and C0 79 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.65 reflects a rolling-element pack sized for heavy static track loading, and the 22.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 10.5 kN at 35 mm bore, equivalent to 1.46 kN of dynamic rating per millimetre — the limiting speed is 2,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.76 kN per millimetre of rolling-element complement mass is 836 g, or 0.36 g per mm² of the 80×29 mm track envelope — inertia that the drive must accelerate on every index of the cam the 35 mm pin bore places this bearing in the medium band, where the 80 mm envelope already carries ratings in the tens of kilonewtons Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 2,100 r/min The open form is relubricated via the inner ring; follow the interval strictly because the packed roller rows trap contaminants Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 80 mm track diameter and 51 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 35 mm seat, and in automotive welding jig rollers the 836 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 29 mm width and the published 79 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR3580?",
        "a": "The NUTR3580 is a NUTR double-row full-complement yoke-type track roller with 80 mm outside diameter, 35 mm bore and 29 mm width, envelope 35×80×29 mm. Mass is 836 g."
      },
      {
        "q": "What does the NUTR3580 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR3580 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 35×80×29 mm and the catalogue ratings are C 51 kN, C0 79 kN, Cur 10.5 kN."
      },
      {
        "q": "What is the load capacity of the NUTR3580?",
        "a": "The basic dynamic load rating C is 51 kN and the basic static load rating C0 is 79 kN; the fatigue load limit Cur is 10.5 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR3580?",
        "a": "HR1 lists a limiting speed of 2,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR3580?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR3580",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR3580",
      "NUTR3580"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR3580-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR3580-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 80,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 43.5,
    "static_load_kN": 65,
    "fatigue_load_limit_kN": 8.3,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 836,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 35×80×29 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 35 mm bore — and the 29 mm width sets the contact width on the mating track the catalogue lists C 43.5 kN and C0 65 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 22.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.3 kN at 35 mm bore, equivalent to 1.24 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 35 mm bore takes the mounting pin or shaft; across the 29 mm contact width the dynamic rating works out to 1.50 kN per millimetre of rolling-element complement mass is 836 g, or 0.36 g per mm² of the 80×29 mm track envelope — inertia that the drive must accelerate on every index of the cam at 35 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 29 mm width as a standard mounting space The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication At 836 g the double-row roller has substantial inertia; the cam drive must accelerate that mass, and a misaligned track concentrates load onto one row -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 43.5 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 80 mm outer ring. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 80 mm track diameter and 43.5 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 35 mm seat, and in printing press sheet-transfer grippers the 836 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 29 mm width and the published 65 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR3580-2RS-XL?",
        "a": "The PWTR3580-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 80 mm outside diameter, 35 mm bore and 29 mm width, envelope 35×80×29 mm. Mass is 836 g."
      },
      {
        "q": "What does the PWTR3580-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR3580-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 35×80×29 mm and the catalogue ratings are C 43.5 kN, C0 65 kN, Cur 8.3 kN."
      },
      {
        "q": "What is the load capacity of the PWTR3580-2RS-XL?",
        "a": "The basic dynamic load rating C is 43.5 kN and the basic static load rating C0 is 65 kN; the fatigue load limit Cur is 8.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR3580-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR3580-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 35 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR3580",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR3580-2RS-XL",
      "PWTR3580-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR40",
    "brand": "FAG",
    "manufacturer_designation": "NUTR40",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 56,
    "static_load_kN": 81,
    "fatigue_load_limit_kN": 11.3,
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600,
    "weight_g": 816,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×80×32 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 56 kN and C0 81 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.69 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 11.3 kN at 40 mm bore, equivalent to 1.40 kN of dynamic rating per millimetre — the limiting speed is 1,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.75 kN per millimetre of rolling-element complement mass is 816 g, or 0.32 g per mm² of the 80×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 40 mm pin bore places this bearing in the medium band, where the 80 mm envelope already carries ratings in the tens of kilonewtons The open form is relubricated via the inner ring; follow the interval strictly because the packed roller rows trap contaminants NUTR is the double-row full-complement yoke roller: two cylindrical roller rows give the highest radial capacity in the 80 mm track-roller envelope, open and relubricatable Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 80 mm track diameter and 56 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 40 mm seat, and in conveyor transfer and diverting stations the 816 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 32 mm width and the published 81 kN static rating. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR40?",
        "a": "The NUTR40 is a NUTR double-row full-complement yoke-type track roller with 80 mm outside diameter, 40 mm bore and 32 mm width, envelope 40×80×32 mm. Mass is 816 g."
      },
      {
        "q": "What does the NUTR40 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR40 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 40×80×32 mm and the catalogue ratings are C 56 kN, C0 81 kN, Cur 11.3 kN."
      },
      {
        "q": "What is the load capacity of the NUTR40?",
        "a": "The basic dynamic load rating C is 56 kN and the basic static load rating C0 is 81 kN; the fatigue load limit Cur is 11.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR40?",
        "a": "HR1 lists a limiting speed of 1,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR40?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR40",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR40",
      "NUTR40"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR40-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR40-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 45,
    "static_load_kN": 62,
    "fatigue_load_limit_kN": 8,
    "limiting_speed_rpm": 1500,
    "max_rpm": 1500,
    "weight_g": 816,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×80×32 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 45 kN and C0 62 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8 kN at 40 mm bore, equivalent to 1.13 kN of dynamic rating per millimetre — the limiting speed is 1,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.41 kN per millimetre of rolling-element complement mass is 816 g, or 0.32 g per mm² of the 80×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 40 mm pin bore marks the medium range: mounting forces and fits become critical, and the 816 g mass calls for proper induction or press tooling rather than hand fitting Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 1,500 r/min The 40 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 62 kN static rating X-life status (-XL) indicates the current Schaeffler premium execution at 40 mm bore; the 62 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 40 mm-bore unit greased for life. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 80 mm track diameter and 45 kN dynamic rating match the duty. In agricultural and textile cam followers the unit fits a compact 40 mm seat, and in packaging machine timing mechanisms the 816 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 32 mm width and the published 62 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR40-2RS-XL?",
        "a": "The PWTR40-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 80 mm outside diameter, 40 mm bore and 32 mm width, envelope 40×80×32 mm. Mass is 816 g."
      },
      {
        "q": "What does the PWTR40-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR40-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 40×80×32 mm and the catalogue ratings are C 45 kN, C0 62 kN, Cur 8 kN."
      },
      {
        "q": "What is the load capacity of the PWTR40-2RS-XL?",
        "a": "The basic dynamic load rating C is 45 kN and the basic static load rating C0 is 62 kN; the fatigue load limit Cur is 8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR40-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR40-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 80 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR40",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR40-2RS-XL",
      "PWTR40-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR45",
    "brand": "FAG",
    "manufacturer_designation": "NUTR45",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 85,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 56,
    "static_load_kN": 85,
    "fatigue_load_limit_kN": 11.7,
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400,
    "weight_g": 883,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 45×85×32 mm: the 85 mm outside diameter is the track-running surface — a thick-walled outer ring over a 45 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 56 kN and C0 85 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.66 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 11.7 kN at 45 mm bore, equivalent to 1.24 kN of dynamic rating per millimetre — the limiting speed is 1,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 45 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.75 kN per millimetre of rolling-element complement mass is 883 g, or 0.32 g per mm² of the 85×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 45 mm pin bore marks the medium range: mounting forces and fits become critical, and the 883 g mass calls for proper induction or press tooling rather than hand fitting NUTR is the double-row full-complement yoke roller: two cylindrical roller rows give the highest radial capacity in the 85 mm track-roller envelope, open and relubricatable The open form is relubricated via the inner ring; follow the interval strictly because the packed roller rows trap contaminants Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 85 mm track diameter and 56 kN dynamic rating match the duty. In woodworking machine feed tracks the unit fits a compact 45 mm seat, and in cam drives and indexing tables the 883 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 32 mm width and the published 85 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 85 mm outer ring does. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 85 mm outer ring does.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR45?",
        "a": "The NUTR45 is a NUTR double-row full-complement yoke-type track roller with 85 mm outside diameter, 45 mm bore and 32 mm width, envelope 45×85×32 mm. Mass is 883 g."
      },
      {
        "q": "What does the NUTR45 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR45 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 45×85×32 mm and the catalogue ratings are C 56 kN, C0 85 kN, Cur 11.7 kN."
      },
      {
        "q": "What is the load capacity of the NUTR45?",
        "a": "The basic dynamic load rating C is 56 kN and the basic static load rating C0 is 85 kN; the fatigue load limit Cur is 11.7 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR45?",
        "a": "HR1 lists a limiting speed of 1,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR45?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 85 mm outer surface tolerates only small angular error. The inner ring lets the 45 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR45",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR45",
      "NUTR45"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR45-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR45-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 85,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 45.5,
    "static_load_kN": 64,
    "fatigue_load_limit_kN": 8.4,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 883,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 45×85×32 mm: the 85 mm outside diameter is the track-running surface — a thick-walled outer ring over a 45 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 45.5 kN and C0 64 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.4 kN at 45 mm bore, equivalent to 1.01 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 45 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.42 kN per millimetre of rolling-element complement mass is 883 g, or 0.32 g per mm² of the 85×32 mm track envelope — inertia that the drive must accelerate on every index of the cam at 45 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 32 mm width as a standard mounting space The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication Reading NUTR/PWTR: double-row, no cage, cylindrical rollers rather than needles — the pack is built for shock-dominated heavy track duty at 1,300 r/min As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 8.4 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 1,300 r/min. Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 85 mm track diameter and 45.5 kN dynamic rating match the duty. In automatic assembly machine carriages the unit fits a compact 45 mm seat, and in automotive welding jig rollers the 883 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 32 mm width and the published 64 kN static rating. Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Sealed PP/2RSR units are greased for life: never add a grease nipple, and respect the lower limiting speed imposed by the rubbing lips.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR45-2RS-XL?",
        "a": "The PWTR45-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 85 mm outside diameter, 45 mm bore and 32 mm width, envelope 45×85×32 mm. Mass is 883 g."
      },
      {
        "q": "What does the PWTR45-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR45-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 45×85×32 mm and the catalogue ratings are C 45.5 kN, C0 64 kN, Cur 8.4 kN."
      },
      {
        "q": "What is the load capacity of the PWTR45-2RS-XL?",
        "a": "The basic dynamic load rating C is 45.5 kN and the basic static load rating C0 is 64 kN; the fatigue load limit Cur is 8.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR45-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR45-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 85 mm outer surface tolerates only small angular error. The inner ring lets the 45 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR45",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR45-2RS-XL",
      "PWTR45-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR4090",
    "brand": "FAG",
    "manufacturer_designation": "NUTR4090",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 66,
    "static_load_kN": 103,
    "fatigue_load_limit_kN": 14.2,
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600,
    "weight_g": 1129,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×90×32 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 66 kN and C0 103 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.64 reflects a rolling-element pack sized for heavy static track loading, and the 25.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 14.2 kN at 40 mm bore, equivalent to 1.65 kN of dynamic rating per millimetre — the limiting speed is 1,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 2.06 kN per millimetre of rolling-element complement mass is 1.129 kg (1129 g), or 0.39 g per mm² of the 90×32 mm track envelope — inertia that the drive must accelerate on every index of the cam at 40 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 32 mm width as a standard mounting space No thermal reference speed is published — the 1,600 r/min limiting speed is the design ceiling, set by roller and seal kinematics At 1129 g the double-row roller has substantial inertia; the cam drive must accelerate that mass, and a misaligned track concentrates load onto one row Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 90 mm track diameter and 66 kN dynamic rating match the duty. In printing press sheet-transfer grippers the unit fits a compact 40 mm seat, and in glass and ceramic line conveyors the 1.129 kg mass is part of the rotor inertia calculation. Designers also specify it for cam drives and indexing tables, relying on the 32 mm width and the published 103 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR4090?",
        "a": "The NUTR4090 is a NUTR double-row full-complement yoke-type track roller with 90 mm outside diameter, 40 mm bore and 32 mm width, envelope 40×90×32 mm. Mass is 1.129 kg."
      },
      {
        "q": "What does the NUTR4090 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR4090 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 40×90×32 mm and the catalogue ratings are C 66 kN, C0 103 kN, Cur 14.2 kN."
      },
      {
        "q": "What is the load capacity of the NUTR4090?",
        "a": "The basic dynamic load rating C is 66 kN and the basic static load rating C0 is 103 kN; the fatigue load limit Cur is 14.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR4090?",
        "a": "HR1 lists a limiting speed of 1,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR4090?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR4090",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR4090",
      "NUTR4090"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR4090-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR4090-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 52,
    "static_load_kN": 77,
    "fatigue_load_limit_kN": 9.8,
    "limiting_speed_rpm": 1500,
    "max_rpm": 1500,
    "weight_g": 1129,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 40×90×32 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 40 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 52 kN and C0 77 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 25.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 9.8 kN at 40 mm bore, equivalent to 1.30 kN of dynamic rating per millimetre — the limiting speed is 1,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 40 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.63 kN per millimetre of rolling-element complement mass is 1.129 kg (1129 g), or 0.39 g per mm² of the 90×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 40 mm pin bore marks the medium range: mounting forces and fits become critical, and the 1129 g mass calls for proper induction or press tooling rather than hand fitting At 1129 g the double-row roller has substantial inertia; the cam drive must accelerate that mass, and a misaligned track concentrates load onto one row PWTR is the sealed double-row full-complement yoke roller: two cylindrical roller rows, 2RS contact seals both sides and the profiled (crowned) running surface on the 90 mm outer ring X-life status (-XL) indicates the current Schaeffler premium execution at 40 mm bore; the 77 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 40 mm-bore unit greased for life. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 90 mm track diameter and 52 kN dynamic rating match the duty. In packaging machine timing mechanisms the unit fits a compact 40 mm seat, and in woodworking machine feed tracks the 1.129 kg mass is part of the rotor inertia calculation. Designers also specify it for agricultural and textile cam followers, relying on the 32 mm width and the published 77 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR4090-2RS-XL?",
        "a": "The PWTR4090-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 90 mm outside diameter, 40 mm bore and 32 mm width, envelope 40×90×32 mm. Mass is 1.129 kg."
      },
      {
        "q": "What does the PWTR4090-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR4090-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 40×90×32 mm and the catalogue ratings are C 52 kN, C0 77 kN, Cur 9.8 kN."
      },
      {
        "q": "What is the load capacity of the PWTR4090-2RS-XL?",
        "a": "The basic dynamic load rating C is 52 kN and the basic static load rating C0 is 77 kN; the fatigue load limit Cur is 9.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR4090-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR4090-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 40 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR4090",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR4090-2RS-XL",
      "PWTR4090-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR50",
    "brand": "FAG",
    "manufacturer_designation": "NUTR50",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 57,
    "static_load_kN": 88,
    "fatigue_load_limit_kN": 12.2,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 950,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×90×32 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 57 kN and C0 88 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.65 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 12.2 kN at 50 mm bore, equivalent to 1.14 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.78 kN per millimetre of rolling-element complement mass is 950 g, or 0.33 g per mm² of the 90×32 mm track envelope — inertia that the drive must accelerate on every index of the cam at 50 mm pin bore this is a mainstream industrial size — conveyor drives, winches and medium gearboxes use the 32 mm width as a standard mounting space No thermal reference speed is published — the 1,300 r/min limiting speed is the design ceiling, set by roller and seal kinematics The 50 mm bore takes the pin; yoke design means the machine lugs support the roller on both sides, which is essential given the 88 kN static rating Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 90 mm track diameter and 57 kN dynamic rating match the duty. In cam drives and indexing tables the unit fits a compact 50 mm seat, and in printing press sheet-transfer grippers the 950 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 32 mm width and the published 88 kN static rating. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 90 mm outer ring does. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 90 mm outer ring does.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR50?",
        "a": "The NUTR50 is a NUTR double-row full-complement yoke-type track roller with 90 mm outside diameter, 50 mm bore and 32 mm width, envelope 50×90×32 mm. Mass is 950 g."
      },
      {
        "q": "What does the NUTR50 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR50 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 50×90×32 mm and the catalogue ratings are C 57 kN, C0 88 kN, Cur 12.2 kN."
      },
      {
        "q": "What is the load capacity of the NUTR50?",
        "a": "The basic dynamic load rating C is 57 kN and the basic static load rating C0 is 88 kN; the fatigue load limit Cur is 12.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR50?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR50?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR50",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR50",
      "NUTR50"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR50-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR50-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 46,
    "static_load_kN": 67,
    "fatigue_load_limit_kN": 8.7,
    "limiting_speed_rpm": 1100,
    "max_rpm": 1100,
    "weight_g": 950,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×90×32 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 46 kN and C0 67 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.69 reflects a rolling-element pack sized for heavy static track loading, and the 20.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.7 kN at 50 mm bore, equivalent to 0.92 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.44 kN per millimetre of rolling-element complement mass is 950 g, or 0.33 g per mm² of the 90×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 50 mm pin bore places this bearing in the medium band, where the 90 mm envelope already carries ratings in the tens of kilonewtons At 950 g the double-row roller has substantial inertia; the cam drive must accelerate that mass, and a misaligned track concentrates load onto one row The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication X-life status (-XL) indicates the current Schaeffler premium execution at 50 mm bore; the 67 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 50 mm-bore unit greased for life. Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 90 mm track diameter and 46 kN dynamic rating match the duty. In glass and ceramic line conveyors the unit fits a compact 50 mm seat, and in linear rail and profile track guidance the 950 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 32 mm width and the published 67 kN static rating. Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Flangeless STO/RSTO/RNA22/NA22 rollers need external axial location; circlips or shoulders must control end float or the roller walks off the track.",
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR50-2RS-XL?",
        "a": "The PWTR50-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 90 mm outside diameter, 50 mm bore and 32 mm width, envelope 50×90×32 mm. Mass is 950 g."
      },
      {
        "q": "What does the PWTR50-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR50-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 50×90×32 mm and the catalogue ratings are C 46 kN, C0 67 kN, Cur 8.7 kN."
      },
      {
        "q": "What is the load capacity of the PWTR50-2RS-XL?",
        "a": "The basic dynamic load rating C is 46 kN and the basic static load rating C0 is 67 kN; the fatigue load limit Cur is 8.7 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR50-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR50-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 90 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR50",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR50-2RS-XL",
      "PWTR50-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR45100",
    "brand": "FAG",
    "manufacturer_designation": "NUTR45100",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 100,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 72,
    "static_load_kN": 116,
    "fatigue_load_limit_kN": 16.1,
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400,
    "weight_g": 1396,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 45×100×32 mm: the 100 mm outside diameter is the track-running surface — a thick-walled outer ring over a 45 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 72 kN and C0 116 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.62 reflects a rolling-element pack sized for heavy static track loading, and the 27.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 16.1 kN at 45 mm bore, equivalent to 1.60 kN of dynamic rating per millimetre — the limiting speed is 1,400 r/min and, as for HR1 track rollers, no thermal reference speed is published the 45 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 2.25 kN per millimetre of rolling-element complement mass is 1.396 kg (1396 g), or 0.44 g per mm² of the 100×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 45 mm pin bore places this bearing in the medium band, where the 100 mm envelope already carries ratings in the tens of kilonewtons NUTR is the double-row full-complement yoke roller: two cylindrical roller rows give the highest radial capacity in the 100 mm track-roller envelope, open and relubricatable Two roller rows across the 32 mm width provide C 72 kN and C0 116 kN, with the thick outer ring profiled to tolerate track misalignment Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 100 mm track diameter and 72 kN dynamic rating match the duty. In automotive welding jig rollers the unit fits a compact 45 mm seat, and in conveyor transfer and diverting stations the 1.396 kg mass is part of the rotor inertia calculation. Designers also specify it for automatic assembly machine carriages, relying on the 32 mm width and the published 116 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 100 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR45100?",
        "a": "The NUTR45100 is a NUTR double-row full-complement yoke-type track roller with 100 mm outside diameter, 45 mm bore and 32 mm width, envelope 45×100×32 mm. Mass is 1.396 kg."
      },
      {
        "q": "What does the NUTR45100 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR45100 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 45×100×32 mm and the catalogue ratings are C 72 kN, C0 116 kN, Cur 16.1 kN."
      },
      {
        "q": "What is the load capacity of the NUTR45100?",
        "a": "The basic dynamic load rating C is 72 kN and the basic static load rating C0 is 116 kN; the fatigue load limit Cur is 16.1 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR45100?",
        "a": "HR1 lists a limiting speed of 1,400 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR45100?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 100 mm outer surface tolerates only small angular error. The inner ring lets the 45 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR45100",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR45100",
      "NUTR45100"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR45100-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR45100-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 100,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 56,
    "static_load_kN": 86,
    "fatigue_load_limit_kN": 11.1,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 1396,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 45×100×32 mm: the 100 mm outside diameter is the track-running surface — a thick-walled outer ring over a 45 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 56 kN and C0 86 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.65 reflects a rolling-element pack sized for heavy static track loading, and the 27.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 11.1 kN at 45 mm bore, equivalent to 1.24 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 45 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.75 kN per millimetre of rolling-element complement mass is 1.396 kg (1396 g), or 0.44 g per mm² of the 100×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 45 mm pin bore marks the medium range: mounting forces and fits become critical, and the 1396 g mass calls for proper induction or press tooling rather than hand fitting The 2RS seals make the unit greased for life: use it where wash-down, dust or lack of access rules out relubrication No thermal reference speed is published — the 1,300 r/min limiting speed is the design ceiling, set by roller and seal kinematics As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 11.1 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 1,300 r/min. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 100 mm track diameter and 56 kN dynamic rating match the duty. In linear rail and profile track guidance the unit fits a compact 45 mm seat, and in automatic assembly machine carriages the 1.396 kg mass is part of the rotor inertia calculation. Designers also specify it for glass and ceramic line conveyors, relying on the 32 mm width and the published 86 kN static rating. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 100 mm outer ring does."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR45100-2RS-XL?",
        "a": "The PWTR45100-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 100 mm outside diameter, 45 mm bore and 32 mm width, envelope 45×100×32 mm. Mass is 1.396 kg."
      },
      {
        "q": "What does the PWTR45100-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR45100-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 45×100×32 mm and the catalogue ratings are C 56 kN, C0 86 kN, Cur 11.1 kN."
      },
      {
        "q": "What is the load capacity of the PWTR45100-2RS-XL?",
        "a": "The basic dynamic load rating C is 56 kN and the basic static load rating C0 is 86 kN; the fatigue load limit Cur is 11.1 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR45100-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR45100-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 100 mm outer surface tolerates only small angular error. The inner ring lets the 45 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR45100",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR45100-2RS-XL",
      "PWTR45100-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUTR50110",
    "brand": "FAG",
    "manufacturer_designation": "NUTR50110",
    "series": "nutr-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 110,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 76,
    "static_load_kN": 130,
    "fatigue_load_limit_kN": 17.9,
    "limiting_speed_rpm": 1300,
    "max_rpm": 1300,
    "weight_g": 1690,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×110×32 mm: the 110 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 76 kN and C0 130 kN for the NUTR double-row full-complement yoke-type track roller; the C/C0 ratio of 0.58 reflects a rolling-element pack sized for heavy static track loading, and the 30.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 17.9 kN at 50 mm bore, equivalent to 1.52 kN of dynamic rating per millimetre — the limiting speed is 1,300 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 2.38 kN per millimetre of rolling-element complement mass is 1.69 kg (1690 g), or 0.48 g per mm² of the 110×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 50 mm pin bore marks the medium range: mounting forces and fits become critical, and the 1690 g mass calls for proper induction or press tooling rather than hand fitting Two roller rows across the 32 mm width provide C 76 kN and C0 130 kN, with the thick outer ring profiled to tolerate track misalignment Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 110 mm track diameter and 76 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 50 mm seat, and in robotic arm linear axes the 1.69 kg mass is part of the rotor inertia calculation. Designers also specify it for automotive welding jig rollers, relying on the 32 mm width and the published 130 kN static rating. Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not. Check the mating track hardness and flatness — a soft or scalloped rail fails before the 110 mm outer ring does.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Full-complement NATV/NUTR/PWTR rollers make heat and flat-spot easily — slow continuous rotation is fine, stationary load on a turning track is not.",
      "Check the mating track hardness and flatness — a soft or scalloped rail fails before the 110 mm outer ring does.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR50110?",
        "a": "The NUTR50110 is a NUTR double-row full-complement yoke-type track roller with 110 mm outside diameter, 50 mm bore and 32 mm width, envelope 50×110×32 mm. Mass is 1.69 kg."
      },
      {
        "q": "What does the NUTR50110 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUTR50110 identifies this NUTR double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 50×110×32 mm and the catalogue ratings are C 76 kN, C0 130 kN, Cur 17.9 kN."
      },
      {
        "q": "What is the load capacity of the NUTR50110?",
        "a": "The basic dynamic load rating C is 76 kN and the basic static load rating C0 is 130 kN; the fatigue load limit Cur is 17.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUTR50110?",
        "a": "HR1 lists a limiting speed of 1,300 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the NUTR50110?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 110 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR50110",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR50110",
      "NUTR50110"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWTR50110-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWTR50110-2RS-XL",
    "series": "pwtr-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 110,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 59,
    "static_load_kN": 95,
    "fatigue_load_limit_kN": 12.3,
    "limiting_speed_rpm": 1100,
    "max_rpm": 1100,
    "weight_g": 1690,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 50×110×32 mm: the 110 mm outside diameter is the track-running surface — a thick-walled outer ring over a 50 mm bore — and the 32 mm width sets the contact width on the mating track the catalogue lists C 59 kN and C0 95 kN for the PWTR sealed double-row full-complement yoke-type track roller; the C/C0 ratio of 0.62 reflects a rolling-element pack sized for heavy static track loading, and the 30.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 12.3 kN at 50 mm bore, equivalent to 1.18 kN of dynamic rating per millimetre — the limiting speed is 1,100 r/min and, as for HR1 track rollers, no thermal reference speed is published the 50 mm bore takes the mounting pin or shaft; across the 32 mm contact width the dynamic rating works out to 1.84 kN per millimetre of rolling-element complement mass is 1.69 kg (1690 g), or 0.48 g per mm² of the 110×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 50 mm pin bore places this bearing in the medium band, where the 110 mm envelope already carries ratings in the tens of kilonewtons No thermal reference speed is published — the 1,100 r/min limiting speed is the design ceiling, set by roller and seal kinematics PWTR is the sealed double-row full-complement yoke roller: two cylindrical roller rows, 2RS contact seals both sides and the profiled (crowned) running surface on the 110 mm outer ring The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 50×110×32 mm envelope. With 2RS seals the 1690 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 110 mm track diameter and 59 kN dynamic rating match the duty. In conveyor transfer and diverting stations the unit fits a compact 50 mm seat, and in robotic arm linear axes the 1.69 kg mass is part of the rotor inertia calculation. Designers also specify it for automotive welding jig rollers, relying on the 32 mm width and the published 95 kN static rating. Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam. The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "outer-ring fatigue cracking across the unsupported track zone under excessive static load",
      "track-side brinelling when the mating rail is softer than the roller running surface",
      "flat spots from standing loads or very short oscillating strokes on full-complement rollers",
      "seal lip failure and grease loss after sustained running above the limiting speed (PP/2RSR executions)",
      "edge wear from skewed tracks that exceed the crowned-profile correction range",
      "pin-seat fretting where a hard journal requirement (RSTO/RNA22) was met with a soft pin",
      "roller walk-off in flangeless STO/RSTO executions with uncontrolled lateral float",
      "contamination entry through open sides in dusty or wash-down environments",
      "cage fracture in caged NATR/STO rollers exposed to heavy shock"
    ],
    "pitfalls": [
      "Yoke lugs must support the pin on both sides over its full length — single-sided support turns the pin into a cantilever beam.",
      "The crowned outer profile tolerates only small skew; a track that departs by more than the catalogue angle still causes edge loading.",
      "The pin or shaft is part of the bearing system: harden it for RSTO/RNA22 positions, and size its deflection because the roller cannot compensate for a bent pin."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR50110-2RS-XL?",
        "a": "The PWTR50110-2RS-XL is a PWTR sealed double-row full-complement yoke-type track roller with 110 mm outside diameter, 50 mm bore and 32 mm width, envelope 50×110×32 mm. Mass is 1.69 kg."
      },
      {
        "q": "What does the PWTR50110-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWTR50110-2RS-XL identifies this PWTR sealed double-row full-complement yoke-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 50×110×32 mm and the catalogue ratings are C 59 kN, C0 95 kN, Cur 12.3 kN."
      },
      {
        "q": "What is the load capacity of the PWTR50110-2RS-XL?",
        "a": "The basic dynamic load rating C is 59 kN and the basic static load rating C0 is 95 kN; the fatigue load limit Cur is 12.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWTR50110-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,100 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "What must the mating track and pin look like for the PWTR50110-2RS-XL?",
        "a": "The track should be flat, harder than the roller contact and clean; the crowned 110 mm outer surface tolerates only small angular error. The inner ring lets the 50 mm pin run at normal machined tolerance; lateral guidance comes from the adjacent structure on flangeless executions."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR50110",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1454",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR50110-2RS-XL",
      "PWTR50110-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR35",
    "brand": "FAG",
    "manufacturer_designation": "NUKR35",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 16,
    "D_mm": 35,
    "B_mm": 52,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 15.3,
    "static_load_kN": 19,
    "fatigue_load_limit_kN": 2.48,
    "limiting_speed_rpm": 6500,
    "max_rpm": 6500,
    "weight_g": 164,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 16×35×52 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 16 mm stud — and the 52 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 15.3 kN and C0 19 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.81 reflects a rolling-element pack sized for heavy static track loading, and the 9.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.48 kN at 16 mm stud, equivalent to 0.96 kN of dynamic rating per millimetre — the limiting speed is 6,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 16 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.29 kN per millimetre of rolling-element complement within the 52 mm overall stud length mass is 164 g, or 0.09 g per mm² of the 35×52 mm track envelope — inertia that the drive must accelerate on every index of the cam the 16 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading the designation: no eccentric collar is fitted — the roller centre is fixed by the stud axis, with labyrinth-style protection at the faces The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 164 g roller runs without cantilever bending Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 35 mm track diameter and 15.3 kN dynamic rating match the duty. In agricultural and textile cam followers the threaded stud bolts directly to the frame, and in packaging machine timing mechanisms the 164 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 52 mm stud length and the published 19 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 52 mm stud unusable. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 52 mm stud unusable.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR35?",
        "a": "The NUKR35 is a NUKR double-row full-complement stud-type track roller with 35 mm outside diameter, 16 mm stud diameter and 52 mm overall length, envelope 16×35×52 mm. Mass is 164 g."
      },
      {
        "q": "What does the NUKR35 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR35 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×35×52 mm and the catalogue ratings are C 15.3 kN, C0 19 kN, Cur 2.48 kN."
      },
      {
        "q": "What is the load capacity of the NUKR35?",
        "a": "The basic dynamic load rating C is 15.3 kN and the basic static load rating C0 is 19 kN; the fatigue load limit Cur is 2.48 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR35?",
        "a": "HR1 lists a limiting speed of 6,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR35 fitted and adjusted?",
        "a": "The 16 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 35 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR35",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR35",
      "NUKR35"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE35",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE35",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 16,
    "D_mm": 35,
    "B_mm": 52,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 15.3,
    "static_load_kN": 19,
    "fatigue_load_limit_kN": 2.48,
    "limiting_speed_rpm": 6500,
    "max_rpm": 6500,
    "weight_g": 177,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 16×35×52 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 16 mm stud — and the 52 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 15.3 kN and C0 19 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.81 reflects a rolling-element pack sized for heavy static track loading, and the 9.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.48 kN at 16 mm stud, equivalent to 0.96 kN of dynamic rating per millimetre — the limiting speed is 6,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 16 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.29 kN per millimetre of rolling-element complement within the 52 mm overall stud length mass is 177 g, or 0.10 g per mm² of the 35×52 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 16 mm stud shank the 52 mm width and 15.3 kN C rating suit high-cycle industrial machinery rather than instrument duty The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 177 g roller runs without cantilever bending NUKRE is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 35 mm track diameter and 15.3 kN dynamic rating match the duty. In cam drives and indexing tables the threaded stud bolts directly to the frame, and in printing press sheet-transfer grippers the 177 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 52 mm stud length and the published 19 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 52 mm stud unusable. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 52 mm stud unusable.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE35?",
        "a": "The NUKRE35 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 35 mm outside diameter, 16 mm stud diameter and 52 mm overall length, envelope 16×35×52 mm. Mass is 177 g."
      },
      {
        "q": "What does the NUKRE35 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE35 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×35×52 mm and the catalogue ratings are C 15.3 kN, C0 19 kN, Cur 2.48 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE35?",
        "a": "The basic dynamic load rating C is 15.3 kN and the basic static load rating C0 is 19 kN; the fatigue load limit Cur is 2.48 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE35?",
        "a": "HR1 lists a limiting speed of 6,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE35 fitted and adjusted?",
        "a": "The 16 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 35 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE35",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE35",
      "NUKRE35"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR35-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR35-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 16,
    "D_mm": 35,
    "B_mm": 52,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 12.6,
    "static_load_kN": 14.9,
    "fatigue_load_limit_kN": 1.79,
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000,
    "weight_g": 164,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 16×35×52 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 16 mm stud — and the 52 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 12.6 kN and C0 14.9 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.85 reflects a rolling-element pack sized for heavy static track loading, and the 9.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.79 kN at 16 mm stud, equivalent to 0.79 kN of dynamic rating per millimetre — the limiting speed is 6,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 16 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.24 kN per millimetre of rolling-element complement within the 52 mm overall stud length mass is 164 g, or 0.09 g per mm² of the 35×52 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 16 mm stud shank the 52 mm width and 12.6 kN C rating suit high-cycle industrial machinery rather than instrument duty The 16 mm stud clamps into the machine frame with its nut and washer while the 35 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 52 mm Two cageless roller rows deliver C 12.6 kN and C0 14.9 kN, 0.79 kN of dynamic rating per millimetre of stud — the heaviest track-roller ratings in the HR1 range -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 12.6 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 35 mm outer ring. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 35 mm track diameter and 12.6 kN dynamic rating match the duty. In packaging machine timing mechanisms the threaded stud bolts directly to the frame, and in woodworking machine feed tracks the 164 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 52 mm stud length and the published 14.9 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR35-2RS-XL?",
        "a": "The PWKR35-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 35 mm outside diameter, 16 mm stud diameter and 52 mm overall length, envelope 16×35×52 mm. Mass is 164 g."
      },
      {
        "q": "What does the PWKR35-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR35-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 16×35×52 mm and the catalogue ratings are C 12.6 kN, C0 14.9 kN, Cur 1.79 kN."
      },
      {
        "q": "What is the load capacity of the PWKR35-2RS-XL?",
        "a": "The basic dynamic load rating C is 12.6 kN and the basic static load rating C0 is 14.9 kN; the fatigue load limit Cur is 1.79 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR35-2RS-XL?",
        "a": "HR1 lists a limiting speed of 6,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR35-2RS-XL fitted and adjusted?",
        "a": "The 16 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 35 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR35",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR35-2RS-XL",
      "PWKR35-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE35-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE35-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 16,
    "D_mm": 35,
    "B_mm": 52,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 12.6,
    "static_load_kN": 14.9,
    "fatigue_load_limit_kN": 1.79,
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000,
    "weight_g": 177,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 16×35×52 mm: the 35 mm outside diameter is the track-running surface — a thick-walled outer ring over a 16 mm stud — and the 52 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 12.6 kN and C0 14.9 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.85 reflects a rolling-element pack sized for heavy static track loading, and the 9.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 1.79 kN at 16 mm stud, equivalent to 0.79 kN of dynamic rating per millimetre — the limiting speed is 6,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 16 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.24 kN per millimetre of rolling-element complement within the 52 mm overall stud length mass is 177 g, or 0.10 g per mm² of the 35×52 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 16 mm stud shank the 52 mm width and 12.6 kN C rating suit high-cycle industrial machinery rather than instrument duty The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 6,000 r/min and no thermal reference speed is given for track rollers The 16 mm stud clamps into the machine frame with its nut and washer while the 35 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 52 mm -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 12.6 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 35 mm outer ring. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 35 mm track diameter and 12.6 kN dynamic rating match the duty. In robotic arm linear axes the threaded stud bolts directly to the frame, and in agricultural and textile cam followers the 177 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 52 mm stud length and the published 14.9 kN static rating. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE35-2RS-XL?",
        "a": "The PWKRE35-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 35 mm outside diameter, 16 mm stud diameter and 52 mm overall length, envelope 16×35×52 mm. Mass is 177 g."
      },
      {
        "q": "What does the PWKRE35-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE35-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 16×35×52 mm and the catalogue ratings are C 12.6 kN, C0 14.9 kN, Cur 1.79 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE35-2RS-XL?",
        "a": "The basic dynamic load rating C is 12.6 kN and the basic static load rating C0 is 14.9 kN; the fatigue load limit Cur is 1.79 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE35-2RS-XL?",
        "a": "HR1 lists a limiting speed of 6,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE35-2RS-XL fitted and adjusted?",
        "a": "The 16 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 35 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE35",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE35-2RS-XL",
      "PWKRE35-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR40",
    "brand": "FAG",
    "manufacturer_designation": "NUKR40",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 18,
    "D_mm": 40,
    "B_mm": 58,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 18.8,
    "static_load_kN": 25.5,
    "fatigue_load_limit_kN": 3.25,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 242,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 18×40×58 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 18 mm stud — and the 58 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 18.8 kN and C0 25.5 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.74 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.25 kN at 18 mm stud, equivalent to 1.04 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.32 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 242 g, or 0.10 g per mm² of the 40×58 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 18 mm stud shank the 58 mm width and 18.8 kN C rating suit high-cycle industrial machinery rather than instrument duty The 18 mm stud clamps into the machine frame with its nut and washer while the 40 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 58 mm Reading the designation: no eccentric collar is fitted — the roller centre is fixed by the stud axis, with labyrinth-style protection at the faces Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 40 mm track diameter and 18.8 kN dynamic rating match the duty. In packaging machine timing mechanisms the threaded stud bolts directly to the frame, and in woodworking machine feed tracks the 242 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 58 mm stud length and the published 25.5 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR40?",
        "a": "The NUKR40 is a NUKR double-row full-complement stud-type track roller with 40 mm outside diameter, 18 mm stud diameter and 58 mm overall length, envelope 18×40×58 mm. Mass is 242 g."
      },
      {
        "q": "What does the NUKR40 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR40 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 18×40×58 mm and the catalogue ratings are C 18.8 kN, C0 25.5 kN, Cur 3.25 kN."
      },
      {
        "q": "What is the load capacity of the NUKR40?",
        "a": "The basic dynamic load rating C is 18.8 kN and the basic static load rating C0 is 25.5 kN; the fatigue load limit Cur is 3.25 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR40?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR40 fitted and adjusted?",
        "a": "The 18 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 40 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR40",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR40",
      "NUKR40"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE40",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE40",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 18,
    "D_mm": 40,
    "B_mm": 58,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 18.8,
    "static_load_kN": 25.5,
    "fatigue_load_limit_kN": 3.25,
    "limiting_speed_rpm": 5500,
    "max_rpm": 5500,
    "weight_g": 258,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 18×40×58 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 18 mm stud — and the 58 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 18.8 kN and C0 25.5 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.74 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.25 kN at 18 mm stud, equivalent to 1.04 kN of dynamic rating per millimetre — the limiting speed is 5,500 r/min and, as for HR1 track rollers, no thermal reference speed is published the 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.32 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 258 g, or 0.11 g per mm² of the 40×58 mm track envelope — inertia that the drive must accelerate on every index of the cam at 18 mm stud shank this size balances the 40 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The 18 mm stud clamps into the machine frame with its nut and washer while the 40 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 58 mm Reading the designation: the trailing E marks the eccentric locking collar — turning the collar shifts the roller centre to take up clearance or preload against the track, with labyrinth-style protection at the faces Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 40 mm track diameter and 18.8 kN dynamic rating match the duty. In printing press sheet-transfer grippers the threaded stud bolts directly to the frame, and in glass and ceramic line conveyors the 258 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 58 mm stud length and the published 25.5 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE40?",
        "a": "The NUKRE40 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 40 mm outside diameter, 18 mm stud diameter and 58 mm overall length, envelope 18×40×58 mm. Mass is 258 g."
      },
      {
        "q": "What does the NUKRE40 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE40 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 18×40×58 mm and the catalogue ratings are C 18.8 kN, C0 25.5 kN, Cur 3.25 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE40?",
        "a": "The basic dynamic load rating C is 18.8 kN and the basic static load rating C0 is 25.5 kN; the fatigue load limit Cur is 3.25 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE40?",
        "a": "HR1 lists a limiting speed of 5,500 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE40 fitted and adjusted?",
        "a": "The 18 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 40 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE40",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE40",
      "NUKRE40"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR40-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR40-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 18,
    "D_mm": 40,
    "B_mm": 58,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 14.3,
    "static_load_kN": 18.2,
    "fatigue_load_limit_kN": 2.2,
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000,
    "weight_g": 242,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 18×40×58 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 18 mm stud — and the 58 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 14.3 kN and C0 18.2 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.79 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.2 kN at 18 mm stud, equivalent to 0.79 kN of dynamic rating per millimetre — the limiting speed is 5,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.25 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 242 g, or 0.10 g per mm² of the 40×58 mm track envelope — inertia that the drive must accelerate on every index of the cam the 18 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Stud mounting puts all moment load into the bracket — torque the stud nut to the catalogue value, support the shank over its full length, and use the eccentric collar only for its small design adjustment range As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 2.2 kN Cur value. 2RS means two side contact seals: the sealed roller excludes contamination without a separate shield arrangement, at the published limiting speed of 5,000 r/min. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 40 mm track diameter and 14.3 kN dynamic rating match the duty. In agricultural and textile cam followers the threaded stud bolts directly to the frame, and in packaging machine timing mechanisms the 242 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 58 mm stud length and the published 18.2 kN static rating. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR40-2RS-XL?",
        "a": "The PWKR40-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 40 mm outside diameter, 18 mm stud diameter and 58 mm overall length, envelope 18×40×58 mm. Mass is 242 g."
      },
      {
        "q": "What does the PWKR40-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR40-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 18×40×58 mm and the catalogue ratings are C 14.3 kN, C0 18.2 kN, Cur 2.2 kN."
      },
      {
        "q": "What is the load capacity of the PWKR40-2RS-XL?",
        "a": "The basic dynamic load rating C is 14.3 kN and the basic static load rating C0 is 18.2 kN; the fatigue load limit Cur is 2.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR40-2RS-XL?",
        "a": "HR1 lists a limiting speed of 5,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR40-2RS-XL fitted and adjusted?",
        "a": "The 18 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 40 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR40",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR40-2RS-XL",
      "PWKR40-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE40-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE40-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 18,
    "D_mm": 40,
    "B_mm": 58,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 14.3,
    "static_load_kN": 18.2,
    "fatigue_load_limit_kN": 2.2,
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000,
    "weight_g": 258,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 18×40×58 mm: the 40 mm outside diameter is the track-running surface — a thick-walled outer ring over a 18 mm stud — and the 58 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 14.3 kN and C0 18.2 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.79 reflects a rolling-element pack sized for heavy static track loading, and the 11.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 2.2 kN at 18 mm stud, equivalent to 0.79 kN of dynamic rating per millimetre — the limiting speed is 5,000 r/min and, as for HR1 track rollers, no thermal reference speed is published the 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.25 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 258 g, or 0.11 g per mm² of the 40×58 mm track envelope — inertia that the drive must accelerate on every index of the cam at 18 mm stud shank this size balances the 40 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 5,000 r/min and no thermal reference speed is given for track rollers Stud mounting puts all moment load into the bracket — torque the stud nut to the catalogue value, support the shank over its full length, and use the eccentric collar only for its small design adjustment range -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 14.3 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 40 mm outer ring. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 40 mm track diameter and 14.3 kN dynamic rating match the duty. In printing press sheet-transfer grippers the threaded stud bolts directly to the frame, and in glass and ceramic line conveyors the 258 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 58 mm stud length and the published 18.2 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
    "applications": [
      "printing press sheet-transfer grippers",
      "automotive welding jig rollers",
      "cam drives and indexing tables",
      "woodworking machine feed tracks"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 58 mm stud unusable.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE40-2RS-XL?",
        "a": "The PWKRE40-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 40 mm outside diameter, 18 mm stud diameter and 58 mm overall length, envelope 18×40×58 mm. Mass is 258 g."
      },
      {
        "q": "What does the PWKRE40-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE40-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 18×40×58 mm and the catalogue ratings are C 14.3 kN, C0 18.2 kN, Cur 2.2 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE40-2RS-XL?",
        "a": "The basic dynamic load rating C is 14.3 kN and the basic static load rating C0 is 18.2 kN; the fatigue load limit Cur is 2.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE40-2RS-XL?",
        "a": "HR1 lists a limiting speed of 5,000 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE40-2RS-XL fitted and adjusted?",
        "a": "The 18 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 40 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE40",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE40-2RS-XL",
      "PWKRE40-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR47",
    "brand": "FAG",
    "manufacturer_designation": "NUKR47",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 28.5,
    "static_load_kN": 38,
    "fatigue_load_limit_kN": 4.95,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 380,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×66 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 28.5 kN and C0 38 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.75 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.95 kN at 20 mm stud, equivalent to 1.43 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.43 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 380 g, or 0.12 g per mm² of the 47×66 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading the designation: no eccentric collar is fitted — the roller centre is fixed by the stud axis, with labyrinth-style protection at the faces The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 380 g roller runs without cantilever bending Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 47 mm track diameter and 28.5 kN dynamic rating match the duty. In automotive welding jig rollers the threaded stud bolts directly to the frame, and in conveyor transfer and diverting stations the 380 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 66 mm stud length and the published 38 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR47?",
        "a": "The NUKR47 is a NUKR double-row full-complement stud-type track roller with 47 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×47×66 mm. Mass is 380 g."
      },
      {
        "q": "What does the NUKR47 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR47 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×66 mm and the catalogue ratings are C 28.5 kN, C0 38 kN, Cur 4.95 kN."
      },
      {
        "q": "What is the load capacity of the NUKR47?",
        "a": "The basic dynamic load rating C is 28.5 kN and the basic static load rating C0 is 38 kN; the fatigue load limit Cur is 4.95 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR47?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR47 fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 47 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR47",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR47",
      "NUKR47"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE47",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE47",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 28.5,
    "static_load_kN": 38,
    "fatigue_load_limit_kN": 4.95,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 400,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×66 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 28.5 kN and C0 38 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.75 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.95 kN at 20 mm stud, equivalent to 1.43 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.43 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 400 g, or 0.13 g per mm² of the 47×66 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm stud shank the 66 mm width and 28.5 kN C rating suit high-cycle industrial machinery rather than instrument duty The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 400 g roller runs without cantilever bending NUKRE is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 47 mm track diameter and 28.5 kN dynamic rating match the duty. In agricultural and textile cam followers the threaded stud bolts directly to the frame, and in packaging machine timing mechanisms the 400 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 66 mm stud length and the published 38 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE47?",
        "a": "The NUKRE47 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 47 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×47×66 mm. Mass is 400 g."
      },
      {
        "q": "What does the NUKRE47 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE47 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×66 mm and the catalogue ratings are C 28.5 kN, C0 38 kN, Cur 4.95 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE47?",
        "a": "The basic dynamic load rating C is 28.5 kN and the basic static load rating C0 is 38 kN; the fatigue load limit Cur is 4.95 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE47?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE47 fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 47 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE47",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE47",
      "NUKRE47"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR47-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR47-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 24.6,
    "static_load_kN": 31,
    "fatigue_load_limit_kN": 3.8,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 380,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×66 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 24.6 kN and C0 31 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.79 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.8 kN at 20 mm stud, equivalent to 1.23 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.37 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 380 g, or 0.12 g per mm² of the 47×66 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm stud shank the 66 mm width and 24.6 kN C rating suit high-cycle industrial machinery rather than instrument duty The 20 mm stud clamps into the machine frame with its nut and washer while the 47 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 66 mm PWKR is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,800 r/min limit. The sealed 2RS execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 47 mm track diameter and 24.6 kN dynamic rating match the duty. In packaging machine timing mechanisms the threaded stud bolts directly to the frame, and in woodworking machine feed tracks the 380 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 66 mm stud length and the published 31 kN static rating. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR47-2RS-XL?",
        "a": "The PWKR47-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 47 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×47×66 mm. Mass is 380 g."
      },
      {
        "q": "What does the PWKR47-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR47-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 20×47×66 mm and the catalogue ratings are C 24.6 kN, C0 31 kN, Cur 3.8 kN."
      },
      {
        "q": "What is the load capacity of the PWKR47-2RS-XL?",
        "a": "The basic dynamic load rating C is 24.6 kN and the basic static load rating C0 is 31 kN; the fatigue load limit Cur is 3.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR47-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR47-2RS-XL fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 47 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR47",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR47-2RS-XL",
      "PWKR47-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE47-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE47-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 24.6,
    "static_load_kN": 31,
    "fatigue_load_limit_kN": 3.8,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 400,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×47×66 mm: the 47 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 24.6 kN and C0 31 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.79 reflects a rolling-element pack sized for heavy static track loading, and the 13.5 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 3.8 kN at 20 mm stud, equivalent to 1.23 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.37 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 400 g, or 0.13 g per mm² of the 47×66 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 20 mm stud shank the 66 mm width and 24.6 kN C rating suit high-cycle industrial machinery rather than instrument duty The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 3,800 r/min and no thermal reference speed is given for track rollers Stud mounting puts all moment load into the bracket — torque the stud nut to the catalogue value, support the shank over its full length, and use the eccentric collar only for its small design adjustment range The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,800 r/min limit. The sealed 2RS execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 47 mm track diameter and 24.6 kN dynamic rating match the duty. In robotic arm linear axes the threaded stud bolts directly to the frame, and in agricultural and textile cam followers the 400 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 66 mm stud length and the published 31 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE47-2RS-XL?",
        "a": "The PWKRE47-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 47 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×47×66 mm. Mass is 400 g."
      },
      {
        "q": "What does the PWKRE47-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE47-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 20×47×66 mm and the catalogue ratings are C 24.6 kN, C0 31 kN, Cur 3.8 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE47-2RS-XL?",
        "a": "The basic dynamic load rating C is 24.6 kN and the basic static load rating C0 is 31 kN; the fatigue load limit Cur is 3.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE47-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE47-2RS-XL fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 47 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE47",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE47-2RS-XL",
      "PWKRE47-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR52",
    "brand": "FAG",
    "manufacturer_designation": "NUKR52",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 29.5,
    "static_load_kN": 41.5,
    "fatigue_load_limit_kN": 5.4,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 450,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×52×66 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 29.5 kN and C0 41.5 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.4 kN at 20 mm stud, equivalent to 1.48 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.45 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 450 g, or 0.13 g per mm² of the 52×66 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm stud shank this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 4,200 r/min and no thermal reference speed is given for track rollers Stud mounting puts all moment load into the bracket — torque the stud nut to the catalogue value, support the shank over its full length, and use the eccentric collar only for its small design adjustment range Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 52 mm track diameter and 29.5 kN dynamic rating match the duty. In robotic arm linear axes the threaded stud bolts directly to the frame, and in agricultural and textile cam followers the 450 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 66 mm stud length and the published 41.5 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR52?",
        "a": "The NUKR52 is a NUKR double-row full-complement stud-type track roller with 52 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×52×66 mm. Mass is 450 g."
      },
      {
        "q": "What does the NUKR52 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR52 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×52×66 mm and the catalogue ratings are C 29.5 kN, C0 41.5 kN, Cur 5.4 kN."
      },
      {
        "q": "What is the load capacity of the NUKR52?",
        "a": "The basic dynamic load rating C is 29.5 kN and the basic static load rating C0 is 41.5 kN; the fatigue load limit Cur is 5.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR52?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR52 fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 52 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR52",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR52",
      "NUKR52"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE52",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE52",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 29.5,
    "static_load_kN": 41.5,
    "fatigue_load_limit_kN": 5.4,
    "limiting_speed_rpm": 4200,
    "max_rpm": 4200,
    "weight_g": 470,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×52×66 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 29.5 kN and C0 41.5 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.4 kN at 20 mm stud, equivalent to 1.48 kN of dynamic rating per millimetre — the limiting speed is 4,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.45 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 470 g, or 0.14 g per mm² of the 52×66 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm stud shank this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 470 g roller runs without cantilever bending NUKRE is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 52 mm track diameter and 29.5 kN dynamic rating match the duty. In packaging machine timing mechanisms the threaded stud bolts directly to the frame, and in woodworking machine feed tracks the 470 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 66 mm stud length and the published 41.5 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 66 mm stud unusable.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE52?",
        "a": "The NUKRE52 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 52 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×52×66 mm. Mass is 470 g."
      },
      {
        "q": "What does the NUKRE52 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE52 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×52×66 mm and the catalogue ratings are C 29.5 kN, C0 41.5 kN, Cur 5.4 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE52?",
        "a": "The basic dynamic load rating C is 29.5 kN and the basic static load rating C0 is 41.5 kN; the fatigue load limit Cur is 5.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE52?",
        "a": "HR1 lists a limiting speed of 4,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE52 fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 52 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE52",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE52",
      "NUKRE52"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR52-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR52-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 25.5,
    "static_load_kN": 33.5,
    "fatigue_load_limit_kN": 4.2,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 450,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×52×66 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 25.5 kN and C0 33.5 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.2 kN at 20 mm stud, equivalent to 1.27 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.39 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 450 g, or 0.13 g per mm² of the 52×66 mm track envelope — inertia that the drive must accelerate on every index of the cam the 20 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty PWKR is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 450 g roller runs without cantilever bending The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 20×52×66 mm envelope. With 2RS seals the 450 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 52 mm track diameter and 25.5 kN dynamic rating match the duty. In agricultural and textile cam followers the threaded stud bolts directly to the frame, and in packaging machine timing mechanisms the 450 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 66 mm stud length and the published 33.5 kN static rating. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement. The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
    "applications": [
      "conveyor transfer and diverting stations",
      "woodworking machine feed tracks",
      "automotive welding jig rollers",
      "automatic assembly machine carriages"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR52-2RS-XL?",
        "a": "The PWKR52-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 52 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×52×66 mm. Mass is 450 g."
      },
      {
        "q": "What does the PWKR52-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR52-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 20×52×66 mm and the catalogue ratings are C 25.5 kN, C0 33.5 kN, Cur 4.2 kN."
      },
      {
        "q": "What is the load capacity of the PWKR52-2RS-XL?",
        "a": "The basic dynamic load rating C is 25.5 kN and the basic static load rating C0 is 33.5 kN; the fatigue load limit Cur is 4.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR52-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR52-2RS-XL fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 52 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR52",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR52-2RS-XL",
      "PWKR52-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE52-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE52-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 66,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 25.5,
    "static_load_kN": 33.5,
    "fatigue_load_limit_kN": 4.2,
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800,
    "weight_g": 470,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 20×52×66 mm: the 52 mm outside diameter is the track-running surface — a thick-walled outer ring over a 20 mm stud — and the 66 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 25.5 kN and C0 33.5 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 16.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 4.2 kN at 20 mm stud, equivalent to 1.27 kN of dynamic rating per millimetre — the limiting speed is 3,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 20 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.39 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 470 g, or 0.14 g per mm² of the 52×66 mm track envelope — inertia that the drive must accelerate on every index of the cam at 20 mm stud shank this size balances the 52 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The 20 mm stud clamps into the machine frame with its nut and washer while the 52 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 66 mm The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,800 r/min limit. The sealed 2RS execution protects the rolling elements in dirty conveyors and cam drives; seal lip drag is the reason for the conservative speed rating. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 52 mm track diameter and 25.5 kN dynamic rating match the duty. In printing press sheet-transfer grippers the threaded stud bolts directly to the frame, and in glass and ceramic line conveyors the 470 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 66 mm stud length and the published 33.5 kN static rating. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE52-2RS-XL?",
        "a": "The PWKRE52-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 52 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×52×66 mm. Mass is 470 g."
      },
      {
        "q": "What does the PWKRE52-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE52-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 20×52×66 mm and the catalogue ratings are C 25.5 kN, C0 33.5 kN, Cur 4.2 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE52-2RS-XL?",
        "a": "The basic dynamic load rating C is 25.5 kN and the basic static load rating C0 is 33.5 kN; the fatigue load limit Cur is 4.2 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE52-2RS-XL?",
        "a": "HR1 lists a limiting speed of 3,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE52-2RS-XL fitted and adjusted?",
        "a": "The 20 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 52 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE52",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE52-2RS-XL",
      "PWKRE52-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR62",
    "brand": "FAG",
    "manufacturer_designation": "NUKR62",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 62,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 40.5,
    "static_load_kN": 55,
    "fatigue_load_limit_kN": 7.4,
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600,
    "weight_g": 795,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×62×80 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 40.5 kN and C0 55 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.74 reflects a rolling-element pack sized for heavy static track loading, and the 19.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.4 kN at 24 mm stud, equivalent to 1.69 kN of dynamic rating per millimetre — the limiting speed is 2,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.51 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 795 g, or 0.16 g per mm² of the 62×80 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 24 mm stud shank the 80 mm width and 40.5 kN C rating suit high-cycle industrial machinery rather than instrument duty Reading the designation: no eccentric collar is fitted — the roller centre is fixed by the stud axis, with labyrinth-style protection at the faces Stud mounting puts all moment load into the bracket — torque the stud nut to the catalogue value, support the shank over its full length, and use the eccentric collar only for its small design adjustment range Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 62 mm track diameter and 40.5 kN dynamic rating match the duty. In glass and ceramic line conveyors the threaded stud bolts directly to the frame, and in linear rail and profile track guidance the 795 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 80 mm stud length and the published 55 kN static rating. The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
    "applications": [
      "automatic assembly machine carriages",
      "agricultural and textile cam followers",
      "linear rail and profile track guidance",
      "glass and ceramic line conveyors"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 80 mm stud unusable."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR62?",
        "a": "The NUKR62 is a NUKR double-row full-complement stud-type track roller with 62 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×62×80 mm. Mass is 795 g."
      },
      {
        "q": "What does the NUKR62 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR62 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×62×80 mm and the catalogue ratings are C 40.5 kN, C0 55 kN, Cur 7.4 kN."
      },
      {
        "q": "What is the load capacity of the NUKR62?",
        "a": "The basic dynamic load rating C is 40.5 kN and the basic static load rating C0 is 55 kN; the fatigue load limit Cur is 7.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR62?",
        "a": "HR1 lists a limiting speed of 2,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR62 fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 62 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR62",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR62",
      "NUKR62"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE62",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE62",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 62,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 40.5,
    "static_load_kN": 55,
    "fatigue_load_limit_kN": 7.4,
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600,
    "weight_g": 824,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×62×80 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 40.5 kN and C0 55 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.74 reflects a rolling-element pack sized for heavy static track loading, and the 19.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.4 kN at 24 mm stud, equivalent to 1.69 kN of dynamic rating per millimetre — the limiting speed is 2,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.51 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 824 g, or 0.17 g per mm² of the 62×80 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 24 mm stud shank the 80 mm width and 40.5 kN C rating suit high-cycle industrial machinery rather than instrument duty Stud mounting puts all moment load into the bracket — torque the stud nut to the catalogue value, support the shank over its full length, and use the eccentric collar only for its small design adjustment range Two cageless roller rows deliver C 40.5 kN and C0 55 kN, 1.69 kN of dynamic rating per millimetre of stud — the heaviest track-roller ratings in the HR1 range Typical applications include automatic assembly machine carriages, automotive welding jig rollers and linear rail and profile track guidance, where the 62 mm track diameter and 40.5 kN dynamic rating match the duty. In automatic assembly machine carriages the threaded stud bolts directly to the frame, and in automotive welding jig rollers the 824 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 80 mm stud length and the published 55 kN static rating. The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 80 mm stud unusable.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 80 mm stud unusable.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE62?",
        "a": "The NUKRE62 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 62 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×62×80 mm. Mass is 824 g."
      },
      {
        "q": "What does the NUKRE62 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE62 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×62×80 mm and the catalogue ratings are C 40.5 kN, C0 55 kN, Cur 7.4 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE62?",
        "a": "The basic dynamic load rating C is 40.5 kN and the basic static load rating C0 is 55 kN; the fatigue load limit Cur is 7.4 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE62?",
        "a": "HR1 lists a limiting speed of 2,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE62 fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 62 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE62",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE62",
      "NUKRE62"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR62-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR62-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 62,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 35,
    "static_load_kN": 46,
    "fatigue_load_limit_kN": 5.9,
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200,
    "weight_g": 795,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×62×80 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 35 kN and C0 46 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 19.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.9 kN at 24 mm stud, equivalent to 1.46 kN of dynamic rating per millimetre — the limiting speed is 2,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.44 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 795 g, or 0.16 g per mm² of the 62×80 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 24 mm stud shank the 80 mm width and 35 kN C rating suit high-cycle industrial machinery rather than instrument duty PWKR is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 2,200 r/min and no thermal reference speed is given for track rollers The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 24×62×80 mm envelope. With 2RS seals the 795 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 62 mm track diameter and 35 kN dynamic rating match the duty. In printing press sheet-transfer grippers the threaded stud bolts directly to the frame, and in glass and ceramic line conveyors the 795 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 80 mm stud length and the published 46 kN static rating. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions. The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR62-2RS-XL?",
        "a": "The PWKR62-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 62 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×62×80 mm. Mass is 795 g."
      },
      {
        "q": "What does the PWKR62-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR62-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 24×62×80 mm and the catalogue ratings are C 35 kN, C0 46 kN, Cur 5.9 kN."
      },
      {
        "q": "What is the load capacity of the PWKR62-2RS-XL?",
        "a": "The basic dynamic load rating C is 35 kN and the basic static load rating C0 is 46 kN; the fatigue load limit Cur is 5.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR62-2RS-XL?",
        "a": "HR1 lists a limiting speed of 2,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR62-2RS-XL fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 62 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR62",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR62-2RS-XL",
      "PWKR62-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE62-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE62-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 62,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 35,
    "static_load_kN": 46,
    "fatigue_load_limit_kN": 5.9,
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200,
    "weight_g": 824,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×62×80 mm: the 62 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 35 kN and C0 46 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.76 reflects a rolling-element pack sized for heavy static track loading, and the 19.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 5.9 kN at 24 mm stud, equivalent to 1.46 kN of dynamic rating per millimetre — the limiting speed is 2,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.44 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 824 g, or 0.17 g per mm² of the 62×80 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 24 mm stud shank the 80 mm width and 35 kN C rating suit high-cycle industrial machinery rather than instrument duty The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 2,200 r/min and no thermal reference speed is given for track rollers The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 24×62×80 mm envelope. With 2RS seals the 824 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 62 mm track diameter and 35 kN dynamic rating match the duty. In woodworking machine feed tracks the threaded stud bolts directly to the frame, and in cam drives and indexing tables the 824 g mass keeps follower kinetics light. Designers also specify it for packaging machine timing mechanisms, relying on the 80 mm stud length and the published 46 kN static rating. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR. The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE62-2RS-XL?",
        "a": "The PWKRE62-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 62 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×62×80 mm. Mass is 824 g."
      },
      {
        "q": "What does the PWKRE62-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE62-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 24×62×80 mm and the catalogue ratings are C 35 kN, C0 46 kN, Cur 5.9 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE62-2RS-XL?",
        "a": "The basic dynamic load rating C is 35 kN and the basic static load rating C0 is 46 kN; the fatigue load limit Cur is 5.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE62-2RS-XL?",
        "a": "HR1 lists a limiting speed of 2,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE62-2RS-XL fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 62 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE62",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE62-2RS-XL",
      "PWKRE62-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR72",
    "brand": "FAG",
    "manufacturer_designation": "NUKR72",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 72,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 45,
    "static_load_kN": 66,
    "fatigue_load_limit_kN": 8.9,
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600,
    "weight_g": 1020,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×72×80 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 45 kN and C0 66 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 24.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.9 kN at 24 mm stud, equivalent to 1.88 kN of dynamic rating per millimetre — the limiting speed is 2,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.56 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.02 kg (1020 g), or 0.18 g per mm² of the 72×80 mm track envelope — inertia that the drive must accelerate on every index of the cam the 24 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The 24 mm stud clamps into the machine frame with its nut and washer while the 72 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 80 mm The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 1020 g roller runs without cantilever bending Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 72 mm track diameter and 45 kN dynamic rating match the duty. In agricultural and textile cam followers the threaded stud bolts directly to the frame, and in packaging machine timing mechanisms the 1.02 kg mass is part of the rotor inertia calculation. Designers also specify it for robotic arm linear axes, relying on the 80 mm stud length and the published 66 kN static rating. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
    "applications": [
      "woodworking machine feed tracks",
      "linear rail and profile track guidance",
      "packaging machine timing mechanisms",
      "agricultural and textile cam followers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR72?",
        "a": "The NUKR72 is a NUKR double-row full-complement stud-type track roller with 72 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×72×80 mm. Mass is 1.02 kg."
      },
      {
        "q": "What does the NUKR72 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR72 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×72×80 mm and the catalogue ratings are C 45 kN, C0 66 kN, Cur 8.9 kN."
      },
      {
        "q": "What is the load capacity of the NUKR72?",
        "a": "The basic dynamic load rating C is 45 kN and the basic static load rating C0 is 66 kN; the fatigue load limit Cur is 8.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR72?",
        "a": "HR1 lists a limiting speed of 2,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR72 fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 72 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR72",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR72",
      "NUKR72"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE72",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE72",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 72,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 45,
    "static_load_kN": 66,
    "fatigue_load_limit_kN": 8.9,
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600,
    "weight_g": 1050,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×72×80 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 45 kN and C0 66 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.68 reflects a rolling-element pack sized for heavy static track loading, and the 24.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 8.9 kN at 24 mm stud, equivalent to 1.88 kN of dynamic rating per millimetre — the limiting speed is 2,600 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.56 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.05 kg (1050 g), or 0.18 g per mm² of the 72×80 mm track envelope — inertia that the drive must accelerate on every index of the cam the 24 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading the designation: the trailing E marks the eccentric locking collar — turning the collar shifts the roller centre to take up clearance or preload against the track, with labyrinth-style protection at the faces NUKRE is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 72 mm track diameter and 45 kN dynamic rating match the duty. In woodworking machine feed tracks the threaded stud bolts directly to the frame, and in cam drives and indexing tables the 1.05 kg mass is part of the rotor inertia calculation. Designers also specify it for packaging machine timing mechanisms, relying on the 80 mm stud length and the published 66 kN static rating. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE72?",
        "a": "The NUKRE72 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 72 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×72×80 mm. Mass is 1.05 kg."
      },
      {
        "q": "What does the NUKRE72 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE72 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×72×80 mm and the catalogue ratings are C 45 kN, C0 66 kN, Cur 8.9 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE72?",
        "a": "The basic dynamic load rating C is 45 kN and the basic static load rating C0 is 66 kN; the fatigue load limit Cur is 8.9 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE72?",
        "a": "HR1 lists a limiting speed of 2,600 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE72 fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 72 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE72",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE72",
      "NUKRE72"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR72-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR72-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 72,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 39,
    "static_load_kN": 55,
    "fatigue_load_limit_kN": 7.1,
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200,
    "weight_g": 1020,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×72×80 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 39 kN and C0 55 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 24.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.1 kN at 24 mm stud, equivalent to 1.63 kN of dynamic rating per millimetre — the limiting speed is 2,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.49 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.02 kg (1020 g), or 0.18 g per mm² of the 72×80 mm track envelope — inertia that the drive must accelerate on every index of the cam the 24 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 2,200 r/min and no thermal reference speed is given for track rollers The 24 mm stud clamps into the machine frame with its nut and washer while the 72 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 80 mm -XL means this is an X-life bearing — Schaeffler's upgraded performance level with smoother raceways, so the 39 kN C rating and longer nominal life come without an envelope change. The 2RS suffix fits elastomer contact seals on both sides, retaining the life-long grease fill behind the 72 mm outer ring. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 72 mm track diameter and 39 kN dynamic rating match the duty. In woodworking machine feed tracks the threaded stud bolts directly to the frame, and in cam drives and indexing tables the 1.02 kg mass is part of the rotor inertia calculation. Designers also specify it for packaging machine timing mechanisms, relying on the 80 mm stud length and the published 55 kN static rating. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
    "applications": [
      "cam drives and indexing tables",
      "automatic assembly machine carriages",
      "woodworking machine feed tracks",
      "packaging machine timing mechanisms"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR72-2RS-XL?",
        "a": "The PWKR72-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 72 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×72×80 mm. Mass is 1.02 kg."
      },
      {
        "q": "What does the PWKR72-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR72-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 24×72×80 mm and the catalogue ratings are C 39 kN, C0 55 kN, Cur 7.1 kN."
      },
      {
        "q": "What is the load capacity of the PWKR72-2RS-XL?",
        "a": "The basic dynamic load rating C is 39 kN and the basic static load rating C0 is 55 kN; the fatigue load limit Cur is 7.1 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR72-2RS-XL?",
        "a": "HR1 lists a limiting speed of 2,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR72-2RS-XL fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 72 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR72",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR72-2RS-XL",
      "PWKR72-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE72-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE72-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 24,
    "D_mm": 72,
    "B_mm": 80,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 39,
    "static_load_kN": 55,
    "fatigue_load_limit_kN": 7.1,
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200,
    "weight_g": 1050,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 24×72×80 mm: the 72 mm outside diameter is the track-running surface — a thick-walled outer ring over a 24 mm stud — and the 80 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 39 kN and C0 55 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.71 reflects a rolling-element pack sized for heavy static track loading, and the 24.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 7.1 kN at 24 mm stud, equivalent to 1.63 kN of dynamic rating per millimetre — the limiting speed is 2,200 r/min and, as for HR1 track rollers, no thermal reference speed is published the 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.49 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.05 kg (1050 g), or 0.18 g per mm² of the 72×80 mm track envelope — inertia that the drive must accelerate on every index of the cam at 24 mm stud shank this size balances the 72 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range Two cageless roller rows deliver C 39 kN and C0 55 kN, 1.63 kN of dynamic rating per millimetre of stud — the heaviest track-roller ratings in the HR1 range The 24 mm stud clamps into the machine frame with its nut and washer while the 72 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 80 mm The -XL suffix marks the X-life execution: refined raceway topography and upgraded materials lift the basic ratings versus the non-X-life bearing at the same 24×72×80 mm envelope. With 2RS seals the 1050 g roller is effectively sealed for life — no relubrication path is provided and none is needed over the design life. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 72 mm track diameter and 39 kN dynamic rating match the duty. In linear rail and profile track guidance the threaded stud bolts directly to the frame, and in automatic assembly machine carriages the 1.05 kg mass is part of the rotor inertia calculation. Designers also specify it for glass and ceramic line conveyors, relying on the 80 mm stud length and the published 55 kN static rating. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE72-2RS-XL?",
        "a": "The PWKRE72-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 72 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×72×80 mm. Mass is 1.05 kg."
      },
      {
        "q": "What does the PWKRE72-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE72-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 24×72×80 mm and the catalogue ratings are C 39 kN, C0 55 kN, Cur 7.1 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE72-2RS-XL?",
        "a": "The basic dynamic load rating C is 39 kN and the basic static load rating C0 is 55 kN; the fatigue load limit Cur is 7.1 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE72-2RS-XL?",
        "a": "HR1 lists a limiting speed of 2,200 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE72-2RS-XL fitted and adjusted?",
        "a": "The 24 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 72 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE72",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE72-2RS-XL",
      "PWKRE72-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR80",
    "brand": "FAG",
    "manufacturer_designation": "NUKR80",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 80,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 69,
    "static_load_kN": 105,
    "fatigue_load_limit_kN": 14.3,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 1600,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×80×100 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 69 kN and C0 105 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.66 reflects a rolling-element pack sized for heavy static track loading, and the 25.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 14.3 kN at 30 mm stud, equivalent to 2.30 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.69 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.6 kg (1600 g), or 0.20 g per mm² of the 80×100 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 30 mm stud shank the 100 mm width and 69 kN C rating suit high-cycle industrial machinery rather than instrument duty The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 1,800 r/min and no thermal reference speed is given for track rollers Reading the designation: no eccentric collar is fitted — the roller centre is fixed by the stud axis, with labyrinth-style protection at the faces Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 80 mm track diameter and 69 kN dynamic rating match the duty. In printing press sheet-transfer grippers the threaded stud bolts directly to the frame, and in glass and ceramic line conveyors the 1.6 kg mass is part of the rotor inertia calculation. Designers also specify it for cam drives and indexing tables, relying on the 100 mm stud length and the published 105 kN static rating. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
    "applications": [
      "packaging machine timing mechanisms",
      "glass and ceramic line conveyors",
      "agricultural and textile cam followers",
      "robotic arm linear axes"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 100 mm stud unusable."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR80?",
        "a": "The NUKR80 is a NUKR double-row full-complement stud-type track roller with 80 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×80×100 mm. Mass is 1.6 kg."
      },
      {
        "q": "What does the NUKR80 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR80 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×80×100 mm and the catalogue ratings are C 69 kN, C0 105 kN, Cur 14.3 kN."
      },
      {
        "q": "What is the load capacity of the NUKR80?",
        "a": "The basic dynamic load rating C is 69 kN and the basic static load rating C0 is 105 kN; the fatigue load limit Cur is 14.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR80?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR80 fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 80 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR80",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR80",
      "NUKR80"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE80",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE80",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 80,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 69,
    "static_load_kN": 105,
    "fatigue_load_limit_kN": 14.3,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 1670,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×80×100 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 69 kN and C0 105 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.66 reflects a rolling-element pack sized for heavy static track loading, and the 25.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 14.3 kN at 30 mm stud, equivalent to 2.30 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.69 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.67 kg (1670 g), or 0.21 g per mm² of the 80×100 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 30 mm stud shank the 100 mm width and 69 kN C rating suit high-cycle industrial machinery rather than instrument duty The 30 mm stud clamps into the machine frame with its nut and washer while the 80 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 100 mm NUKRE is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 80 mm track diameter and 69 kN dynamic rating match the duty. In linear rail and profile track guidance the threaded stud bolts directly to the frame, and in automatic assembly machine carriages the 1.67 kg mass is part of the rotor inertia calculation. Designers also specify it for glass and ceramic line conveyors, relying on the 100 mm stud length and the published 105 kN static rating. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE80?",
        "a": "The NUKRE80 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 80 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×80×100 mm. Mass is 1.67 kg."
      },
      {
        "q": "What does the NUKRE80 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE80 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×80×100 mm and the catalogue ratings are C 69 kN, C0 105 kN, Cur 14.3 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE80?",
        "a": "The basic dynamic load rating C is 69 kN and the basic static load rating C0 is 105 kN; the fatigue load limit Cur is 14.3 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE80?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE80 fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 80 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE80",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE80",
      "NUKRE80"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR80-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR80-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 80,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 56,
    "static_load_kN": 80,
    "fatigue_load_limit_kN": 10.8,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 1600,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×80×100 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 56 kN and C0 80 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.70 reflects a rolling-element pack sized for heavy static track loading, and the 25.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 10.8 kN at 30 mm stud, equivalent to 1.87 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.56 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.6 kg (1600 g), or 0.20 g per mm² of the 80×100 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading the designation: no eccentric collar is fitted — the roller centre is fixed by the stud axis, and the 2RS seals close both sides for a greased-for-life unit PWKR is a double-row full-complement stud-type track roller: two cylindrical roller rows run on a heavy-section threaded stud, ready to bolt straight into a bracket X-life status (-XL) indicates the current Schaeffler premium execution at 30 mm bore; the 80 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 30 mm-bore unit greased for life. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 80 mm track diameter and 56 kN dynamic rating match the duty. In agricultural and textile cam followers the threaded stud bolts directly to the frame, and in packaging machine timing mechanisms the 1.6 kg mass is part of the rotor inertia calculation. Designers also specify it for robotic arm linear axes, relying on the 100 mm stud length and the published 80 kN static rating. Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
    "applications": [
      "robotic arm linear axes",
      "cam drives and indexing tables",
      "conveyor transfer and diverting stations",
      "automotive welding jig rollers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR80-2RS-XL?",
        "a": "The PWKR80-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 80 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×80×100 mm. Mass is 1.6 kg."
      },
      {
        "q": "What does the PWKR80-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR80-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 30×80×100 mm and the catalogue ratings are C 56 kN, C0 80 kN, Cur 10.8 kN."
      },
      {
        "q": "What is the load capacity of the PWKR80-2RS-XL?",
        "a": "The basic dynamic load rating C is 56 kN and the basic static load rating C0 is 80 kN; the fatigue load limit Cur is 10.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR80-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR80-2RS-XL fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 80 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR80",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR80-2RS-XL",
      "PWKR80-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE80-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE80-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 80,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 56,
    "static_load_kN": 80,
    "fatigue_load_limit_kN": 10.8,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 1670,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×80×100 mm: the 80 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 56 kN and C0 80 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.70 reflects a rolling-element pack sized for heavy static track loading, and the 25.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 10.8 kN at 30 mm stud, equivalent to 1.87 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.56 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.67 kg (1670 g), or 0.21 g per mm² of the 80×100 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 1670 g roller runs without cantilever bending X-life status (-XL) indicates the current Schaeffler premium execution at 30 mm bore; the 80 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 30 mm-bore unit greased for life. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 80 mm track diameter and 56 kN dynamic rating match the duty. In conveyor transfer and diverting stations the threaded stud bolts directly to the frame, and in robotic arm linear axes the 1.67 kg mass is part of the rotor inertia calculation. Designers also specify it for automotive welding jig rollers, relying on the 100 mm stud length and the published 80 kN static rating. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
    "applications": [
      "automotive welding jig rollers",
      "packaging machine timing mechanisms",
      "automatic assembly machine carriages",
      "linear rail and profile track guidance"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE80-2RS-XL?",
        "a": "The PWKRE80-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 80 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×80×100 mm. Mass is 1.67 kg."
      },
      {
        "q": "What does the PWKRE80-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE80-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 30×80×100 mm and the catalogue ratings are C 56 kN, C0 80 kN, Cur 10.8 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE80-2RS-XL?",
        "a": "The basic dynamic load rating C is 56 kN and the basic static load rating C0 is 80 kN; the fatigue load limit Cur is 10.8 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE80-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE80-2RS-XL fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 80 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE80",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE80-2RS-XL",
      "PWKRE80-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKR90",
    "brand": "FAG",
    "manufacturer_designation": "NUKR90",
    "series": "nukr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 90,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 79,
    "static_load_kN": 126,
    "fatigue_load_limit_kN": 17,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 1960,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×90×100 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 79 kN and C0 126 kN for the NUKR double-row full-complement stud-type track roller; the C/C0 ratio of 0.63 reflects a rolling-element pack sized for heavy static track loading, and the 30.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 17 kN at 30 mm stud, equivalent to 2.63 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.79 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.96 kg (1960 g), or 0.22 g per mm² of the 90×100 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Reading the designation: no eccentric collar is fitted — the roller centre is fixed by the stud axis, with labyrinth-style protection at the faces Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 90 mm track diameter and 79 kN dynamic rating match the duty. In robotic arm linear axes the threaded stud bolts directly to the frame, and in agricultural and textile cam followers the 1.96 kg mass is part of the rotor inertia calculation. Designers also specify it for conveyor transfer and diverting stations, relying on the 100 mm stud length and the published 126 kN static rating. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
    "applications": [
      "linear rail and profile track guidance",
      "robotic arm linear axes",
      "glass and ceramic line conveyors",
      "printing press sheet-transfer grippers"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 100 mm stud unusable."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKR90?",
        "a": "The NUKR90 is a NUKR double-row full-complement stud-type track roller with 90 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×90×100 mm. Mass is 1.96 kg."
      },
      {
        "q": "What does the NUKR90 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKR90 identifies this NUKR double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×90×100 mm and the catalogue ratings are C 79 kN, C0 126 kN, Cur 17 kN."
      },
      {
        "q": "What is the load capacity of the NUKR90?",
        "a": "The basic dynamic load rating C is 79 kN and the basic static load rating C0 is 126 kN; the fatigue load limit Cur is 17 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKR90?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKR90 fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 90 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKR90",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKR90",
      "NUKR90"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NUKRE90",
    "brand": "FAG",
    "manufacturer_designation": "NUKRE90",
    "series": "nukre-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 90,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 79,
    "static_load_kN": 126,
    "fatigue_load_limit_kN": 17,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 2020,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×90×100 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 79 kN and C0 126 kN for the NUKRE double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.63 reflects a rolling-element pack sized for heavy static track loading, and the 30.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 17 kN at 30 mm stud, equivalent to 2.63 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.79 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 2.02 kg (2020 g), or 0.22 g per mm² of the 90×100 mm track envelope — inertia that the drive must accelerate on every index of the cam the 30 mm stud shank falls in the small band, the workhorse size for gearbox planetary positions, hydraulic pumps and general cam and linkage duty Two cageless roller rows deliver C 79 kN and C0 126 kN, 2.63 kN of dynamic rating per millimetre of stud — the heaviest track-roller ratings in the HR1 range Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 90 mm track diameter and 79 kN dynamic rating match the duty. In packaging machine timing mechanisms the threaded stud bolts directly to the frame, and in woodworking machine feed tracks the 2.02 kg mass is part of the rotor inertia calculation. Designers also specify it for agricultural and textile cam followers, relying on the 100 mm stud length and the published 126 kN static rating. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.",
      "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUKRE90?",
        "a": "The NUKRE90 is a NUKRE double-row full-complement stud-type track roller with eccentric locking collar with 90 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×90×100 mm. Mass is 2.02 kg."
      },
      {
        "q": "What does the NUKRE90 designation mean in the FAG/INA HR1 catalogue?",
        "a": "NUKRE90 identifies this NUKRE double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×90×100 mm and the catalogue ratings are C 79 kN, C0 126 kN, Cur 17 kN."
      },
      {
        "q": "What is the load capacity of the NUKRE90?",
        "a": "The basic dynamic load rating C is 79 kN and the basic static load rating C0 is 126 kN; the fatigue load limit Cur is 17 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the NUKRE90?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the NUKRE90 fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 90 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUKRE90",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUKRE90",
      "NUKRE90"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKR90-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKR90-2RS-XL",
    "series": "pwkr-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 90,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 62,
    "static_load_kN": 92,
    "fatigue_load_limit_kN": 12.5,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 1960,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×90×100 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 62 kN and C0 92 kN for the PWKR sealed double-row full-complement stud-type track roller; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 30.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 12.5 kN at 30 mm stud, equivalent to 2.07 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.62 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.96 kg (1960 g), or 0.22 g per mm² of the 90×100 mm track envelope — inertia that the drive must accelerate on every index of the cam at 30 mm stud shank this size balances the 90 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 1960 g roller runs without cantilever bending The 30 mm stud clamps into the machine frame with its nut and washer while the 90 mm thick-walled, crowned-profile outer ring runs on the cam; overall length is 100 mm X-life status (-XL) indicates the current Schaeffler premium execution at 30 mm bore; the 92 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 30 mm-bore unit greased for life. Typical applications include glass and ceramic line conveyors, linear rail and profile track guidance and printing press sheet-transfer grippers, where the 90 mm track diameter and 62 kN dynamic rating match the duty. In glass and ceramic line conveyors the threaded stud bolts directly to the frame, and in linear rail and profile track guidance the 1.96 kg mass is part of the rotor inertia calculation. Designers also specify it for printing press sheet-transfer grippers, relying on the 100 mm stud length and the published 92 kN static rating. The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
    "applications": [
      "agricultural and textile cam followers",
      "printing press sheet-transfer grippers",
      "robotic arm linear axes",
      "conveyor transfer and diverting stations"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "Use a washer under the nut and a flat square bracket face; the stud head alone cannot spread the clamp load of the heavy double-row executions."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKR90-2RS-XL?",
        "a": "The PWKR90-2RS-XL is a PWKR sealed double-row full-complement stud-type track roller with 90 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×90×100 mm. Mass is 1.96 kg."
      },
      {
        "q": "What does the PWKR90-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKR90-2RS-XL identifies this PWKR sealed double-row full-complement stud-type track roller in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 30×90×100 mm and the catalogue ratings are C 62 kN, C0 92 kN, Cur 12.5 kN."
      },
      {
        "q": "What is the load capacity of the PWKR90-2RS-XL?",
        "a": "The basic dynamic load rating C is 62 kN and the basic static load rating C0 is 92 kN; the fatigue load limit Cur is 12.5 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKR90-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKR90-2RS-XL fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The 90 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKR90",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKR90-2RS-XL",
      "PWKR90-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "PWKRE90-2RS-XL",
    "brand": "FAG",
    "manufacturer_designation": "PWKRE90-2RS-XL",
    "series": "pwkre-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 90,
    "B_mm": 100,
    "material": "GCr15",
    "seal_type": "2RS",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "none",
    "dynamic_load_kN": 62,
    "static_load_kN": 92,
    "fatigue_load_limit_kN": 12.5,
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800,
    "weight_g": 2020,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "envelope 30×90×100 mm: the 90 mm outside diameter is the track-running surface — a thick-walled outer ring over a 30 mm stud — and the 100 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 62 kN and C0 92 kN for the PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar; the C/C0 ratio of 0.67 reflects a rolling-element pack sized for heavy static track loading, and the 30.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 12.5 kN at 30 mm stud, equivalent to 2.07 kN of dynamic rating per millimetre — the limiting speed is 1,800 r/min and, as for HR1 track rollers, no thermal reference speed is published the 30 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.62 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 2.02 kg (2020 g), or 0.22 g per mm² of the 90×100 mm track envelope — inertia that the drive must accelerate on every index of the cam with a 30 mm stud shank the 100 mm width and 62 kN C rating suit high-cycle industrial machinery rather than instrument duty The outer ring is axially guided by the rolling elements against the stud head and thrust washer; the clamping faces must be square so the 2020 g roller runs without cantilever bending The stud is drilled for relubrication via the lubricating nipple in the head; the limiting speed is 1,800 r/min and no thermal reference speed is given for track rollers X-life status (-XL) indicates the current Schaeffler premium execution at 30 mm bore; the 92 kN C0 rating reflects the improved rolling-contact geometry. Reading the suffix: 2RS is the FAG/INA code for rubbing lip seals at both faces, making the 30 mm-bore unit greased for life. Typical applications include woodworking machine feed tracks, cam drives and indexing tables and packaging machine timing mechanisms, where the 90 mm track diameter and 62 kN dynamic rating match the duty. In woodworking machine feed tracks the threaded stud bolts directly to the frame, and in cam drives and indexing tables the 2.02 kg mass is part of the rotor inertia calculation. Designers also specify it for packaging machine timing mechanisms, relying on the 100 mm stud length and the published 92 kN static rating. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
    "applications": [
      "glass and ceramic line conveyors",
      "conveyor transfer and diverting stations",
      "printing press sheet-transfer grippers",
      "cam drives and indexing tables"
    ],
    "failure_modes": [
      "stud bending and loosening when the shank is not fully supported by the bracket",
      "bracket hole fretting and ovalisation under an under-torqued mounting nut",
      "outer-ring fatigue at the cam contact from overloading beyond the track-rated C0",
      "flat spots on full-complement followers during short-stroke oscillation",
      "seal destruction and grease loss above the limiting speed on PP/2RS executions",
      "edge loading after the crowned profile bottoms out against a badly skewed cam",
      "eccentric-collar slippage when the lock nut is not re-torqued after adjustment",
      "lubricant starvation of the stud contact when the relubrication interval is ignored",
      "stud-thread damage from hammering or from using the hex socket as a press point"
    ],
    "pitfalls": [
      "The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.",
      "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.",
      "Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR."
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWKRE90-2RS-XL?",
        "a": "The PWKRE90-2RS-XL is a PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar with 90 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×90×100 mm. Mass is 2.02 kg."
      },
      {
        "q": "What does the PWKRE90-2RS-XL designation mean in the FAG/INA HR1 catalogue?",
        "a": "PWKRE90-2RS-XL identifies this PWKRE sealed double-row full-complement stud-type track roller with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 30×90×100 mm and the catalogue ratings are C 62 kN, C0 92 kN, Cur 12.5 kN."
      },
      {
        "q": "What is the load capacity of the PWKRE90-2RS-XL?",
        "a": "The basic dynamic load rating C is 62 kN and the basic static load rating C0 is 92 kN; the fatigue load limit Cur is 12.5 kN. For track rollers these values already cover the thick-walled outer ring bending case on an unsupported track."
      },
      {
        "q": "What is the maximum speed of the PWKRE90-2RS-XL?",
        "a": "HR1 lists a limiting speed of 1,800 r/min for track rollers and no thermal reference speed. The crowned thick-walled outer ring and (on stud types) the stud contact make the limiting speed the governing figure."
      },
      {
        "q": "How is a stud-type roller like the PWKRE90-2RS-XL fitted and adjusted?",
        "a": "The 30 mm threaded stud passes through the bracket and is clamped with its nut and washer against a flat face; torque to the catalogue value and support the shank over its full length. The eccentric locking collar is turned to set the track preload, then the nut is re-torqued. The 90 mm outer ring then runs directly on the cam."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWKRE90",
        "equiv_brand": "ISO 15",
        "level": "verify",
        "note": "ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting."
      }
    ],
    "source_ref": "https://www.schaeffler.com/remotemedien/media/_shared_media/08_media_library/01_publications/schaeffler_2/catalogue_1/downloads_6/hr1_de_en.pdf#pdfpage=1459",
    "catalog_ver": "HR1 2026-09-25",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWKRE90-2RS-XL",
      "PWKRE90-2RS-XL"
    ],
    "locale_variants": {}
  },
  {
    "sku": "NA-22-6-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 22/6.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 4.02,
    "static_load_kN": 3.65,
    "fatigue_load_limit_kN": 0.425,
    "weight_g": 22,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 19 mm outside diameter runs on the track while the 6 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.02 kN and C0 3.65 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 1.10 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 0.425 kN at 6 mm bore gives a specific load of 0.67 kN per mm; the limiting speed is 7,000 r/min the 12 mm width carries the load at 0.33 kN per mm of roller complement; section height 6.5 mm between bore and track surface determines the outer-ring bending stiffness mass 22 g over a 19x12 mm envelope works out to 0.096 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 6 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely reading NA 22..2RS: sealed yoke-type track roller with inner ring — the 2RS suffix means integral contact seals, making it the maintenance-free counterpart of the open STO typical applications include sheet-metal forming press feeds, textile machine cam drives and agricultural equipment cam followers this size is commonly specified for sheet-metal forming press feeds and textile machine cam drives, where the 19 mm track diameter and 6 mm bore fit standard cam and rail geometries in agricultural equipment cam followers the 19 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 22 g mass is low enough for rapid indexing cycles the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
    "applications": [
      "robotic arm track guidance",
      "sheet-metal forming press feeds",
      "paper mill web guide rollers",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-22/6.2RS?",
        "a": "NA-22/6.2RS is a sealed support roller without flange rings, with inner ring with 19 mm outside diameter, 6 mm bore diameter and 12 mm overall width. The bore is 6 mm and the track contact diameter is 19 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 19x6x12 mm envelope and the 7000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-22/6.2RS?",
        "a": "The published basic dynamic load rating C is 4.02 kN and the basic static load rating C0 is 3.65 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-22-6-2RS",
      "NA 22/6.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 7000,
    "max_rpm": 7000
  },
  {
    "sku": "NA-22-8-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 22/8.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 4.68,
    "static_load_kN": 4.55,
    "fatigue_load_limit_kN": 0.54,
    "weight_g": 34,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 24 mm outside diameter runs on the track while the 8 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.68 kN and C0 4.55 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 1.03 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 0.54 kN at 8 mm bore gives a specific load of 0.58 kN per mm; the limiting speed is 6,700 r/min the 12 mm width carries the load at 0.39 kN per mm of roller complement; section height 8.0 mm between bore and track surface determines the outer-ring bending stiffness mass 34 g over a 24x12 mm envelope works out to 0.118 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 8 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely the NA 22 series with 2RS suffix denotes a compact sealed support roller for applications where relubrication access is impossible and the track environment carries dust or moisture typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 24 mm track diameter and 8 mm bore fit standard cam and rail geometries in glass processing line conveyors the 24 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 34 g mass is low enough for rapid indexing cycles the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
    "applications": [
      "conveyor transfer and diverting rollers",
      "agricultural equipment cam followers",
      "woodworking machinery feed rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-22/8.2RS?",
        "a": "NA-22/8.2RS is a sealed support roller without flange rings, with inner ring with 24 mm outside diameter, 8 mm bore diameter and 12 mm overall width. The bore is 8 mm and the track contact diameter is 24 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 24x8x12 mm envelope and the 6700 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-22/8.2RS?",
        "a": "The published basic dynamic load rating C is 4.68 kN and the basic static load rating C0 is 4.55 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-22-8-2RS",
      "NA 22/8.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 6700,
    "max_rpm": 6700
  },
  {
    "sku": "NA-2200-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2200.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 14,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 6.6,
    "static_load_kN": 7.5,
    "fatigue_load_limit_kN": 0.88,
    "weight_g": 60,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 30 mm outside diameter runs on the track while the 10 mm bore takes the pin or shaft; the 14 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.6 kN and C0 7.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 0.88 kN at 10 mm bore gives a specific load of 0.66 kN per mm; the limiting speed is 6,300 r/min the 14 mm width carries the load at 0.47 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 60 g over a 30x14 mm envelope works out to 0.143 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 10 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely NA 22..2RS is the sealed, greased-for-life variant of the flangeless support roller; the NBR contact lips ride on the inner ring and protect the needle complement in dirty or humid environments typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 30 mm track diameter and 10 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 30 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 60 g mass is low enough for rapid indexing cycles the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
    "applications": [
      "textile machine cam drives",
      "automotive welding jig positioners",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2200.2RS?",
        "a": "NA-2200.2RS is a sealed support roller without flange rings, with inner ring with 30 mm outside diameter, 10 mm bore diameter and 14 mm overall width. The bore is 10 mm and the track contact diameter is 30 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 30x10x14 mm envelope and the 6300 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2200.2RS?",
        "a": "The published basic dynamic load rating C is 6.6 kN and the basic static load rating C0 is 7.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2200-2RS",
      "NA 2200.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 6300,
    "max_rpm": 6300
  },
  {
    "sku": "NA-2201-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2201.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 14,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.04,
    "static_load_kN": 8.5,
    "fatigue_load_limit_kN": 1,
    "weight_g": 67,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm bore takes the pin or shaft; the 14 mm overall width spreads the Hertzian contact over the outer ring published ratings C 7.04 kN and C0 8.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.83 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 1 kN at 12 mm bore gives a specific load of 0.59 kN per mm; the limiting speed is 6,000 r/min the 14 mm width carries the load at 0.50 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 67 g over a 32x14 mm envelope works out to 0.150 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 12 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers NA 22..2RS names the sealed support roller: contact seals on both sides retain grease and exclude contamination, at the cost of a lower 6000 r/min limiting speed than the open STO size typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 32 mm track diameter and 12 mm bore fit standard cam and rail geometries in sheet-metal forming press feeds the 32 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 67 g mass is low enough for rapid indexing cycles the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
    "applications": [
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives",
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2201.2RS?",
        "a": "NA-2201.2RS is a sealed support roller without flange rings, with inner ring with 32 mm outside diameter, 12 mm bore diameter and 14 mm overall width. The bore is 12 mm and the track contact diameter is 32 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 32x12x14 mm envelope and the 6000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2201.2RS?",
        "a": "The published basic dynamic load rating C is 7.04 kN and the basic static load rating C0 is 8.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2201-2RS",
      "NA 2201.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000
  },
  {
    "sku": "NA-2202-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2202.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 14,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.48,
    "static_load_kN": 9.3,
    "fatigue_load_limit_kN": 1.12,
    "weight_g": 75,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 14 mm overall width spreads the Hertzian contact over the outer ring published ratings C 7.48 kN and C0 9.3 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.80 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 1.12 kN at 15 mm bore gives a specific load of 0.50 kN per mm; the limiting speed is 5,000 r/min the 14 mm width carries the load at 0.53 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 75 g over a 35x14 mm envelope works out to 0.153 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 15 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NA 22 series with 2RS suffix denotes a compact sealed support roller for applications where relubrication access is impossible and the track environment carries dust or moisture typical applications include woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 75 g mass is low enough for rapid indexing cycles NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
    "applications": [
      "material handling lift and lower tracks",
      "woodworking machinery feed rollers",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2202.2RS?",
        "a": "NA-2202.2RS is a sealed support roller without flange rings, with inner ring with 35 mm outside diameter, 15 mm bore diameter and 14 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 35x15x14 mm envelope and the 5000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2202.2RS?",
        "a": "The published basic dynamic load rating C is 7.48 kN and the basic static load rating C0 is 9.3 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2202-2RS",
      "NA 2202.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000
  },
  {
    "sku": "NA-2203-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2203.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 16,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.52,
    "static_load_kN": 13.2,
    "fatigue_load_limit_kN": 1.6,
    "weight_g": 110,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 16 mm overall width spreads the Hertzian contact over the outer ring published ratings C 9.52 kN and C0 13.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.72 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 1.6 kN at 17 mm bore gives a specific load of 0.56 kN per mm; the limiting speed is 4,500 r/min the 16 mm width carries the load at 0.59 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 110 g over a 40x16 mm envelope works out to 0.172 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 17 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the NA 22/..2RS designation combines the NA 22 series envelope with two-side rubbing seals; the 16 mm width accommodates the seal recesses while keeping the 40 mm track contact diameter typical applications include automatic assembly machine linkages, food processing line track rollers and printing press roller followers this size is commonly specified for automatic assembly machine linkages and food processing line track rollers, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in printing press roller followers the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 110 g mass is low enough for rapid indexing cycles the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
    "applications": [
      "agricultural equipment cam followers",
      "automatic assembly machine linkages",
      "packaging machine timing cams",
      "glass processing line conveyors"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2203.2RS?",
        "a": "NA-2203.2RS is a sealed support roller without flange rings, with inner ring with 40 mm outside diameter, 17 mm bore diameter and 16 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 40x17x16 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2203.2RS?",
        "a": "The published basic dynamic load rating C is 9.52 kN and the basic static load rating C0 is 13.2 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2203-2RS",
      "NA 2203.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "NA-2204-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2204.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 18,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.1,
    "static_load_kN": 18,
    "fatigue_load_limit_kN": 2.16,
    "weight_g": 180,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 18 mm overall width spreads the Hertzian contact over the outer ring published ratings C 16.1 kN and C0 18 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.89 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 2.16 kN at 20 mm bore gives a specific load of 0.81 kN per mm; the limiting speed is 4,000 r/min the 18 mm width carries the load at 0.89 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 180 g over a 47x18 mm envelope works out to 0.213 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 20 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NA 22..2RS names the sealed support roller: contact seals on both sides retain grease and exclude contamination, at the cost of a lower 4000 r/min limiting speed than the open STO size typical applications include material handling lift and lower tracks, sheet-metal forming press feeds and textile machine cam drives this size is commonly specified for material handling lift and lower tracks and sheet-metal forming press feeds, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in textile machine cam drives the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 180 g mass is low enough for rapid indexing cycles NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
    "applications": [
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks",
      "cam mechanisms and indexing drives",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2204.2RS?",
        "a": "NA-2204.2RS is a sealed support roller without flange rings, with inner ring with 47 mm outside diameter, 20 mm bore diameter and 18 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 47x20x18 mm envelope and the 4000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2204.2RS?",
        "a": "The published basic dynamic load rating C is 16.1 kN and the basic static load rating C0 is 18 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2204-2RS",
      "NA 2204.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4000,
    "max_rpm": 4000
  },
  {
    "sku": "NA-2205-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2205.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 18,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.8,
    "static_load_kN": 20,
    "fatigue_load_limit_kN": 2.4,
    "weight_g": 210,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 18 mm overall width spreads the Hertzian contact over the outer ring published ratings C 16.8 kN and C0 20 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.84 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 2.4 kN at 25 mm bore gives a specific load of 0.67 kN per mm; the limiting speed is 3,400 r/min the 18 mm width carries the load at 0.93 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 210 g over a 52x18 mm envelope works out to 0.224 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 25 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads NA 22..2RS is the sealed, greased-for-life variant of the flangeless support roller; the NBR contact lips ride on the inner ring and protect the needle complement in dirty or humid environments typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in glass processing line conveyors the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 210 g mass is low enough for rapid indexing cycles the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
    "applications": [
      "automatic assembly machine linkages",
      "agricultural equipment cam followers",
      "food processing line track rollers",
      "printing press roller followers"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2205.2RS?",
        "a": "NA-2205.2RS is a sealed support roller without flange rings, with inner ring with 52 mm outside diameter, 25 mm bore diameter and 18 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 52x25x18 mm envelope and the 3400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2205.2RS?",
        "a": "The published basic dynamic load rating C is 16.8 kN and the basic static load rating C0 is 20 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2205-2RS",
      "NA 2205.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3400,
    "max_rpm": 3400
  },
  {
    "sku": "NA-2206-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2206.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 20,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 17.9,
    "static_load_kN": 25.5,
    "fatigue_load_limit_kN": 3.05,
    "weight_g": 320,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 20 mm overall width spreads the Hertzian contact over the outer ring published ratings C 17.9 kN and C0 25.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.70 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 3.05 kN at 30 mm bore gives a specific load of 0.60 kN per mm; the limiting speed is 2,800 r/min the 20 mm width carries the load at 0.89 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 320 g over a 62x20 mm envelope works out to 0.258 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 30 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads reading NA 22..2RS: sealed yoke-type track roller with inner ring — the 2RS suffix means integral contact seals, making it the maintenance-free counterpart of the open STO typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in packaging machine timing cams the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 320 g mass is low enough for rapid indexing cycles the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
    "applications": [
      "automotive welding jig positioners",
      "textile machine cam drives",
      "conveyor transfer and diverting rollers",
      "woodworking machinery feed rollers"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2206.2RS?",
        "a": "NA-2206.2RS is a sealed support roller without flange rings, with inner ring with 62 mm outside diameter, 30 mm bore diameter and 20 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 62x30x20 mm envelope and the 2800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2206.2RS?",
        "a": "The published basic dynamic load rating C is 17.9 kN and the basic static load rating C0 is 25.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2206-2RS",
      "NA 2206.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2800,
    "max_rpm": 2800
  },
  {
    "sku": "NA-2207-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2207.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 23,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 22.4,
    "static_load_kN": 35.5,
    "fatigue_load_limit_kN": 4.3,
    "weight_g": 510,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 23 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22.4 kN and C0 35.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.63 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 4.3 kN at 35 mm bore gives a specific load of 0.64 kN per mm; the limiting speed is 2,200 r/min the 23 mm width carries the load at 0.97 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 510 g over a 72x23 mm envelope works out to 0.308 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 35 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the NA 22 series with 2RS suffix denotes a compact sealed support roller for applications where relubrication access is impossible and the track environment carries dust or moisture typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 510 g mass is low enough for rapid indexing cycles the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
    "applications": [
      "cam mechanisms and indexing drives",
      "conveyor transfer and diverting rollers",
      "material handling lift and lower tracks",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2207.2RS?",
        "a": "NA-2207.2RS is a sealed support roller without flange rings, with inner ring with 72 mm outside diameter, 35 mm bore diameter and 23 mm overall width. The bore is 35 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 72x35x23 mm envelope and the 2200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2207.2RS?",
        "a": "The published basic dynamic load rating C is 22.4 kN and the basic static load rating C0 is 35.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2207-2RS",
      "NA 2207.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200
  },
  {
    "sku": "NA-2208-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2208.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 23,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 27.5,
    "static_load_kN": 40.5,
    "fatigue_load_limit_kN": 5,
    "weight_g": 630,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 23 mm overall width spreads the Hertzian contact over the outer ring published ratings C 27.5 kN and C0 40.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.68 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 5 kN at 40 mm bore gives a specific load of 0.69 kN per mm; the limiting speed is 1,900 r/min the 23 mm width carries the load at 1.20 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 630 g over a 80x23 mm envelope works out to 0.342 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 40 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity NA 22..2RS names the sealed support roller: contact seals on both sides retain grease and exclude contamination, at the cost of a lower 1900 r/min limiting speed than the open STO size typical applications include packaging machine timing cams, glass processing line conveyors and linear guide and track systems this size is commonly specified for packaging machine timing cams and glass processing line conveyors, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in linear guide and track systems the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 630 g mass is low enough for rapid indexing cycles the contact seals add a small running torque; in low-power cam drives the drag can be significant the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
    "applications": [
      "food processing line track rollers",
      "packaging machine timing cams",
      "printing press roller followers",
      "automotive welding jig positioners"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2208.2RS?",
        "a": "NA-2208.2RS is a sealed support roller without flange rings, with inner ring with 80 mm outside diameter, 40 mm bore diameter and 23 mm overall width. The bore is 40 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 80x40x23 mm envelope and the 1900 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2208.2RS?",
        "a": "The published basic dynamic load rating C is 27.5 kN and the basic static load rating C0 is 40.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2208-2RS",
      "NA 2208.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1900,
    "max_rpm": 1900
  },
  {
    "sku": "NA-2210-2RS",
    "brand": "SKF",
    "manufacturer_designation": "NA 2210.2RS",
    "series": "NA22-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 23,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 28.1,
    "static_load_kN": 43,
    "fatigue_load_limit_kN": 5.3,
    "weight_g": 690,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 90 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 23 mm overall width spreads the Hertzian contact over the outer ring published ratings C 28.1 kN and C0 43 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.65 is typical for sealed support roller without flange rings, with inner ring executions fatigue load limit Pu 5.3 kN at 50 mm bore gives a specific load of 0.56 kN per mm; the limiting speed is 1,600 r/min the 23 mm width carries the load at 1.22 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 690 g over a 90x23 mm envelope works out to 0.333 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 50 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads NA 22..2RS names the sealed support roller: contact seals on both sides retain grease and exclude contamination, at the cost of a lower 1600 r/min limiting speed than the open STO size typical applications include automatic assembly machine linkages, food processing line track rollers and printing press roller followers this size is commonly specified for automatic assembly machine linkages and food processing line track rollers, where the 90 mm track diameter and 50 mm bore fit standard cam and rail geometries in printing press roller followers the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 690 g mass is low enough for rapid indexing cycles sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open the contact seals add a small running torque; in low-power cam drives the drag can be significant",
    "applications": [
      "cam mechanisms and indexing drives",
      "automatic assembly machine linkages",
      "material handling lift and lower tracks",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant",
      "the seal recesses reduce the effective roller complement width; do not substitute an open STO size without checking the reduced C rating",
      "NBR seals degrade in contact with certain synthetic lubricants and solvents; verify compatibility before exposing the roller to process chemicals",
      "the compact envelope and sealed construction make this size sensitive to over-greasing during manufacture — excess grease churns and overheats at speed"
    ],
    "pitfalls": [
      "the 2RS seals limit the maximum speed; exceeding the printed limiting speed overheats the NBR lips and destroys the grease fill",
      "sealed rollers are greased for life — adding a relubrication fitting is pointless and can force the seals open",
      "the contact seals add a small running torque; in low-power cam drives the drag can be significant"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NA-2210.2RS?",
        "a": "NA-2210.2RS is a sealed support roller without flange rings, with inner ring with 90 mm outside diameter, 50 mm bore diameter and 23 mm overall width. The bore is 50 mm and the track contact diameter is 90 mm."
      },
      {
        "q": "What does the NA designation mean?",
        "a": "The NA prefix identifies this as a sealed support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 90x50x23 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NA-2210.2RS?",
        "a": "The published basic dynamic load rating C is 28.1 kN and the basic static load rating C0 is 43 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NA",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NA-2210-2RS",
      "NA 2210.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "NATR-10",
    "brand": "SKF",
    "manufacturer_designation": "NATR 10",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 6.44,
    "static_load_kN": 8,
    "fatigue_load_limit_kN": 0.88,
    "weight_g": 64,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 30 mm outside diameter runs on the track while the 10 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.44 kN and C0 8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.88 kN at 10 mm bore gives a specific load of 0.64 kN per mm; the limiting speed is 4,800 r/min the 15 mm width carries the load at 0.43 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 64 g over a 30x15 mm envelope works out to 0.142 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty with a 10 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely reading NATR: needle roller support roller with integral flange rings; the 30 mm outer ring runs on the track while the flanges keep the roller centred without separate thrust washers typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 30 mm track diameter and 10 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 30 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 64 g mass is low enough for rapid indexing cycles cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
    "applications": [
      "woodworking machinery feed rollers",
      "automotive welding jig positioners",
      "cam mechanisms and indexing drives",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-10?",
        "a": "NATR-10 is a support roller with flange rings, with inner ring with 30 mm outside diameter, 10 mm bore diameter and 15 mm overall width. The bore is 10 mm and the track contact diameter is 30 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 30x10x15 mm envelope and the 4800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-10?",
        "a": "The published basic dynamic load rating C is 6.44 kN and the basic static load rating C0 is 8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-10",
      "NATR 10"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4800,
    "max_rpm": 4800
  },
  {
    "sku": "NATR-10-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 10 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 6.44,
    "static_load_kN": 8,
    "fatigue_load_limit_kN": 0.88,
    "weight_g": 61,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 30 mm outside diameter runs on the track while the 10 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.44 kN and C0 8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.88 kN at 10 mm bore gives a specific load of 0.64 kN per mm; the limiting speed is 4,800 r/min the 15 mm width carries the load at 0.43 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 61 g over a 30x15 mm envelope works out to 0.136 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 10 mm bore this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms NATR adds pressed-on flange rings to the basic support roller; these locate the roller axially and absorb light side thrust, but they are not designed for continuous axial load PPA changes the outer-ring profile from cylindrical to crowned; the barrel shape lowers edge stress when the cam track is not perfectly parallel to the roller axis typical applications include woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 30 mm track diameter and 10 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 30 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 61 g mass is low enough for rapid indexing cycles the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
    "applications": [
      "material handling lift and lower tracks",
      "woodworking machinery feed rollers",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-10-PPA?",
        "a": "NATR-10-PPA is a support roller with flange rings, with inner ring with 30 mm outside diameter, 10 mm bore diameter and 15 mm overall width. The bore is 10 mm and the track contact diameter is 30 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 30x10x15 mm envelope and the 4800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-10-PPA?",
        "a": "The published basic dynamic load rating C is 6.44 kN and the basic static load rating C0 is 8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-10-PPA",
      "NATR 10 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4800,
    "max_rpm": 4800
  },
  {
    "sku": "NATR-12",
    "brand": "SKF",
    "manufacturer_designation": "NATR 12",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 6.6,
    "static_load_kN": 8.5,
    "fatigue_load_limit_kN": 0.95,
    "weight_g": 71,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.6 kN and C0 8.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.78 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.95 kN at 12 mm bore gives a specific load of 0.55 kN per mm; the limiting speed is 4,500 r/min the 15 mm width carries the load at 0.44 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 71 g over a 32x15 mm envelope works out to 0.148 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 12 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers NATR identifies a support roller with axial flange rings pressed onto the inner ring: the flanges guide the roller axially and let it handle light thrust from skewed tracks or misaligned cams typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 32 mm track diameter and 12 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 32 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 71 g mass is low enough for rapid indexing cycles do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
    "applications": [
      "packaging machine timing cams",
      "linear guide and track systems",
      "glass processing line conveyors",
      "robotic arm track guidance"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-12?",
        "a": "NATR-12 is a support roller with flange rings, with inner ring with 32 mm outside diameter, 12 mm bore diameter and 15 mm overall width. The bore is 12 mm and the track contact diameter is 32 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 32x12x15 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-12?",
        "a": "The published basic dynamic load rating C is 6.6 kN and the basic static load rating C0 is 8.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-12",
      "NATR 12"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "NATR-12-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 12 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 6.6,
    "static_load_kN": 8.5,
    "fatigue_load_limit_kN": 0.95,
    "weight_g": 66,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.6 kN and C0 8.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.78 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.95 kN at 12 mm bore gives a specific load of 0.55 kN per mm; the limiting speed is 4,500 r/min the 15 mm width carries the load at 0.44 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 66 g over a 32x15 mm envelope works out to 0.138 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 12 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads NATR adds pressed-on flange rings to the basic support roller; these locate the roller axially and absorb light side thrust, but they are not designed for continuous axial load PPA changes the outer-ring profile from cylindrical to crowned; the barrel shape lowers edge stress when the cam track is not perfectly parallel to the roller axis typical applications include paper mill web guide rollers, automatic assembly machine linkages and food processing line track rollers this size is commonly specified for paper mill web guide rollers and automatic assembly machine linkages, where the 32 mm track diameter and 12 mm bore fit standard cam and rail geometries in food processing line track rollers the 32 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 66 g mass is low enough for rapid indexing cycles cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
    "applications": [
      "linear guide and track systems",
      "paper mill web guide rollers",
      "robotic arm track guidance",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-12-PPA?",
        "a": "NATR-12-PPA is a support roller with flange rings, with inner ring with 32 mm outside diameter, 12 mm bore diameter and 15 mm overall width. The bore is 12 mm and the track contact diameter is 32 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 32x12x15 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-12-PPA?",
        "a": "The published basic dynamic load rating C is 6.6 kN and the basic static load rating C0 is 8.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-12-PPA",
      "NATR 12 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "NATR-15",
    "brand": "SKF",
    "manufacturer_designation": "NATR 15",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.52,
    "static_load_kN": 13.7,
    "fatigue_load_limit_kN": 1.56,
    "weight_g": 100,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 9.52 kN and C0 13.7 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.69 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 1.56 kN at 15 mm bore gives a specific load of 0.63 kN per mm; the limiting speed is 4,000 r/min the 19 mm width carries the load at 0.50 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 100 g over a 35x19 mm envelope works out to 0.150 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 15 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NATR execution is the caged, flanged variant — cage guidance gives a higher limiting speed than the full-complement NATV, while the flanges simplify housing design by eliminating separate thrust faces typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 100 g mass is low enough for rapid indexing cycles the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
    "applications": [
      "conveyor transfer and diverting rollers",
      "printing press roller followers",
      "woodworking machinery feed rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-15?",
        "a": "NATR-15 is a support roller with flange rings, with inner ring with 35 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 35x15x19 mm envelope and the 4000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-15?",
        "a": "The published basic dynamic load rating C is 9.52 kN and the basic static load rating C0 is 13.7 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-15",
      "NATR 15"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4000,
    "max_rpm": 4000
  },
  {
    "sku": "NATR-15-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 15 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.52,
    "static_load_kN": 13.7,
    "fatigue_load_limit_kN": 1.56,
    "weight_g": 95,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 9.52 kN and C0 13.7 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.69 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 1.56 kN at 15 mm bore gives a specific load of 0.63 kN per mm; the limiting speed is 4,000 r/min the 19 mm width carries the load at 0.50 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 95 g over a 35x19 mm envelope works out to 0.143 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 15 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the NATR prefix denotes the flanged support roller — two pressed steel flange rings on the 15 mm bore locate the needle roller complement laterally, so the roller can tolerate some track misalignment PPA denotes the crowned running surface: the 35 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include automatic assembly machine linkages, food processing line track rollers and printing press roller followers this size is commonly specified for automatic assembly machine linkages and food processing line track rollers, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in printing press roller followers the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 95 g mass is low enough for rapid indexing cycles the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
    "applications": [
      "agricultural equipment cam followers",
      "automatic assembly machine linkages",
      "packaging machine timing cams",
      "glass processing line conveyors"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-15-PPA?",
        "a": "NATR-15-PPA is a support roller with flange rings, with inner ring with 35 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 35x15x19 mm envelope and the 4000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-15-PPA?",
        "a": "The published basic dynamic load rating C is 9.52 kN and the basic static load rating C0 is 13.7 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-15-PPA",
      "NATR 15 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4000,
    "max_rpm": 4000
  },
  {
    "sku": "NATR-17",
    "brand": "SKF",
    "manufacturer_designation": "NATR 17",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 10.5,
    "static_load_kN": 14.6,
    "fatigue_load_limit_kN": 1.73,
    "weight_g": 140,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 10.5 kN and C0 14.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.72 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 1.73 kN at 17 mm bore gives a specific load of 0.62 kN per mm; the limiting speed is 3,400 r/min the 21 mm width carries the load at 0.50 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 140 g over a 40x21 mm envelope works out to 0.167 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 17 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers reading NATR: needle roller support roller with integral flange rings; the 40 mm outer ring runs on the track while the flanges keep the roller centred without separate thrust washers typical applications include glass processing line conveyors, linear guide and track systems and robotic arm track guidance this size is commonly specified for glass processing line conveyors and linear guide and track systems, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in robotic arm track guidance the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 140 g mass is low enough for rapid indexing cycles the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
    "applications": [
      "agricultural equipment cam followers",
      "glass processing line conveyors",
      "packaging machine timing cams",
      "linear guide and track systems"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-17?",
        "a": "NATR-17 is a support roller with flange rings, with inner ring with 40 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 40x17x21 mm envelope and the 3400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-17?",
        "a": "The published basic dynamic load rating C is 10.5 kN and the basic static load rating C0 is 14.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-17",
      "NATR 17"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3400,
    "max_rpm": 3400
  },
  {
    "sku": "NATR-17-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 17 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 10.5,
    "static_load_kN": 14.6,
    "fatigue_load_limit_kN": 1.73,
    "weight_g": 140,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 10.5 kN and C0 14.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.72 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 1.73 kN at 17 mm bore gives a specific load of 0.62 kN per mm; the limiting speed is 3,400 r/min the 21 mm width carries the load at 0.50 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 140 g over a 40x21 mm envelope works out to 0.167 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 17 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NATR prefix denotes the flanged support roller — two pressed steel flange rings on the 17 mm bore locate the needle roller complement laterally, so the roller can tolerate some track misalignment PPA denotes the crowned running surface: the 40 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 140 g mass is low enough for rapid indexing cycles the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
    "applications": [
      "sheet-metal forming press feeds",
      "printing press roller followers",
      "textile machine cam drives",
      "agricultural equipment cam followers"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-17-PPA?",
        "a": "NATR-17-PPA is a support roller with flange rings, with inner ring with 40 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 40x17x21 mm envelope and the 3400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-17-PPA?",
        "a": "The published basic dynamic load rating C is 10.5 kN and the basic static load rating C0 is 14.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-17-PPA",
      "NATR 17 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3400,
    "max_rpm": 3400
  },
  {
    "sku": "NATR-20",
    "brand": "SKF",
    "manufacturer_designation": "NATR 20",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.7,
    "static_load_kN": 24.5,
    "fatigue_load_limit_kN": 2.9,
    "weight_g": 250,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.7 kN and C0 24.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.60 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 2.9 kN at 20 mm bore gives a specific load of 0.73 kN per mm; the limiting speed is 3,000 r/min the 25 mm width carries the load at 0.59 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 250 g over a 47x25 mm envelope works out to 0.213 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NATR execution is the caged, flanged variant — cage guidance gives a higher limiting speed than the full-complement NATV, while the flanges simplify housing design by eliminating separate thrust faces typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in sheet-metal forming press feeds the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 250 g mass is low enough for rapid indexing cycles the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
    "applications": [
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives",
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-20?",
        "a": "NATR-20 is a support roller with flange rings, with inner ring with 47 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 47x20x25 mm envelope and the 3000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-20?",
        "a": "The published basic dynamic load rating C is 14.7 kN and the basic static load rating C0 is 24.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-20",
      "NATR 20"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3000,
    "max_rpm": 3000
  },
  {
    "sku": "NATR-20-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 20 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.7,
    "static_load_kN": 24.5,
    "fatigue_load_limit_kN": 2.9,
    "weight_g": 240,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.7 kN and C0 24.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.60 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 2.9 kN at 20 mm bore gives a specific load of 0.73 kN per mm; the limiting speed is 3,000 r/min the 25 mm width carries the load at 0.59 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 240 g over a 47x25 mm envelope works out to 0.204 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 20 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the NATR execution is the caged, flanged variant — cage guidance gives a higher limiting speed than the full-complement NATV, while the flanges simplify housing design by eliminating separate thrust faces the PPA variant has a crowned track surface: the 47 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include glass processing line conveyors, linear guide and track systems and robotic arm track guidance this size is commonly specified for glass processing line conveyors and linear guide and track systems, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in robotic arm track guidance the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 240 g mass is low enough for rapid indexing cycles the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
    "applications": [
      "agricultural equipment cam followers",
      "glass processing line conveyors",
      "packaging machine timing cams",
      "linear guide and track systems"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-20-PPA?",
        "a": "NATR-20-PPA is a support roller with flange rings, with inner ring with 47 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 47x20x25 mm envelope and the 3000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-20-PPA?",
        "a": "The published basic dynamic load rating C is 14.7 kN and the basic static load rating C0 is 24.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-20-PPA",
      "NATR 20 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3000,
    "max_rpm": 3000
  },
  {
    "sku": "NATR-25",
    "brand": "SKF",
    "manufacturer_designation": "NATR 25",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.7,
    "static_load_kN": 25.5,
    "fatigue_load_limit_kN": 3.1,
    "weight_g": 280,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.7 kN and C0 25.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.58 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 3.1 kN at 25 mm bore gives a specific load of 0.59 kN per mm; the limiting speed is 2,400 r/min the 25 mm width carries the load at 0.59 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 280 g over a 52x25 mm envelope works out to 0.215 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 25 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads NATR adds pressed-on flange rings to the basic support roller; these locate the roller axially and absorb light side thrust, but they are not designed for continuous axial load typical applications include paper mill web guide rollers, automatic assembly machine linkages and food processing line track rollers this size is commonly specified for paper mill web guide rollers and automatic assembly machine linkages, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in food processing line track rollers the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 280 g mass is low enough for rapid indexing cycles cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
    "applications": [
      "woodworking machinery feed rollers",
      "paper mill web guide rollers",
      "cam mechanisms and indexing drives",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-25?",
        "a": "NATR-25 is a support roller with flange rings, with inner ring with 52 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 52x25x25 mm envelope and the 2400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-25?",
        "a": "The published basic dynamic load rating C is 14.7 kN and the basic static load rating C0 is 25.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-25",
      "NATR 25"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2400,
    "max_rpm": 2400
  },
  {
    "sku": "NATR-25-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 25 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.7,
    "static_load_kN": 25.5,
    "fatigue_load_limit_kN": 3.1,
    "weight_g": 270,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.7 kN and C0 25.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.58 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 3.1 kN at 25 mm bore gives a specific load of 0.59 kN per mm; the limiting speed is 2,400 r/min the 25 mm width carries the load at 0.59 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 270 g over a 52x25 mm envelope works out to 0.208 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 25 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads NATR adds pressed-on flange rings to the basic support roller; these locate the roller axially and absorb light side thrust, but they are not designed for continuous axial load PPA changes the outer-ring profile from cylindrical to crowned; the barrel shape lowers edge stress when the cam track is not perfectly parallel to the roller axis typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in packaging machine timing cams the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 270 g mass is low enough for rapid indexing cycles the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
    "applications": [
      "material handling lift and lower tracks",
      "textile machine cam drives",
      "sheet-metal forming press feeds",
      "agricultural equipment cam followers"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-25-PPA?",
        "a": "NATR-25-PPA is a support roller with flange rings, with inner ring with 52 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 52x25x25 mm envelope and the 2400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-25-PPA?",
        "a": "The published basic dynamic load rating C is 14.7 kN and the basic static load rating C0 is 25.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-25-PPA",
      "NATR 25 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2400,
    "max_rpm": 2400
  },
  {
    "sku": "NATR-30",
    "brand": "SKF",
    "manufacturer_designation": "NATR 30",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 22.9,
    "static_load_kN": 37.5,
    "fatigue_load_limit_kN": 4.55,
    "weight_g": 470,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22.9 kN and C0 37.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.61 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 4.55 kN at 30 mm bore gives a specific load of 0.76 kN per mm; the limiting speed is 1,800 r/min the 29 mm width carries the load at 0.79 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 470 g over a 62x29 mm envelope works out to 0.261 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 30 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads reading NATR: needle roller support roller with integral flange rings; the 62 mm outer ring runs on the track while the flanges keep the roller centred without separate thrust washers typical applications include woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 470 g mass is low enough for rapid indexing cycles the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
    "applications": [
      "automotive welding jig positioners",
      "woodworking machinery feed rollers",
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-30?",
        "a": "NATR-30 is a support roller with flange rings, with inner ring with 62 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 62x30x29 mm envelope and the 1800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-30?",
        "a": "The published basic dynamic load rating C is 22.9 kN and the basic static load rating C0 is 37.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-30",
      "NATR 30"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800
  },
  {
    "sku": "NATR-30-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 30 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 22.9,
    "static_load_kN": 37.5,
    "fatigue_load_limit_kN": 4.55,
    "weight_g": 440,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22.9 kN and C0 37.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.61 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 4.55 kN at 30 mm bore gives a specific load of 0.76 kN per mm; the limiting speed is 1,800 r/min the 29 mm width carries the load at 0.79 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 440 g over a 62x29 mm envelope works out to 0.245 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 30 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads reading NATR: needle roller support roller with integral flange rings; the 62 mm outer ring runs on the track while the flanges keep the roller centred without separate thrust washers reading the PPA suffix: crowned outer ring — the track contact is barrel-shaped to tolerate angular misalignment between the roller axis and the track typical applications include material handling lift and lower tracks, sheet-metal forming press feeds and textile machine cam drives this size is commonly specified for material handling lift and lower tracks and sheet-metal forming press feeds, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in textile machine cam drives the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 440 g mass is low enough for rapid indexing cycles do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
    "applications": [
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks",
      "cam mechanisms and indexing drives",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-30-PPA?",
        "a": "NATR-30-PPA is a support roller with flange rings, with inner ring with 62 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 62x30x29 mm envelope and the 1800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-30-PPA?",
        "a": "The published basic dynamic load rating C is 22.9 kN and the basic static load rating C0 is 37.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-30-PPA",
      "NATR 30 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800
  },
  {
    "sku": "NATR-35-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 35 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 24.6,
    "static_load_kN": 43,
    "fatigue_load_limit_kN": 5.3,
    "weight_g": 550,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 24.6 kN and C0 43 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.57 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 5.3 kN at 35 mm bore gives a specific load of 0.70 kN per mm; the limiting speed is 1,600 r/min the 29 mm width carries the load at 0.85 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 550 g over a 72x29 mm envelope works out to 0.263 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 35 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs NATR identifies a support roller with axial flange rings pressed onto the inner ring: the flanges guide the roller axially and let it handle light thrust from skewed tracks or misaligned cams the PPA suffix specifies a crowned (radius) outer-ring running surface instead of the standard cylindrical profile — the crown distributes edge stress when the track is not perfectly aligned typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in glass processing line conveyors the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 550 g mass is low enough for rapid indexing cycles the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
    "applications": [
      "automatic assembly machine linkages",
      "agricultural equipment cam followers",
      "food processing line track rollers",
      "printing press roller followers"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-35-PPA?",
        "a": "NATR-35-PPA is a support roller with flange rings, with inner ring with 72 mm outside diameter, 35 mm bore diameter and 29 mm overall width. The bore is 35 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 72x35x29 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-35-PPA?",
        "a": "The published basic dynamic load rating C is 24.6 kN and the basic static load rating C0 is 43 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-35-PPA",
      "NATR 35 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "NATR-40-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 40 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 31.9,
    "static_load_kN": 57,
    "fatigue_load_limit_kN": 7.1,
    "weight_g": 800,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 31.9 kN and C0 57 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.56 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 7.1 kN at 40 mm bore gives a specific load of 0.80 kN per mm; the limiting speed is 1,500 r/min the 32 mm width carries the load at 1.00 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 800 g over a 80x32 mm envelope works out to 0.313 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 40 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the NATR execution is the caged, flanged variant — cage guidance gives a higher limiting speed than the full-complement NATV, while the flanges simplify housing design by eliminating separate thrust faces the PPA variant has a crowned track surface: the 80 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 800 g mass is low enough for rapid indexing cycles the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
    "applications": [
      "automatic assembly machine linkages",
      "robotic arm track guidance",
      "food processing line track rollers",
      "printing press roller followers"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-40-PPA?",
        "a": "NATR-40-PPA is a support roller with flange rings, with inner ring with 80 mm outside diameter, 40 mm bore diameter and 32 mm overall width. The bore is 40 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 80x40x32 mm envelope and the 1500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-40-PPA?",
        "a": "The published basic dynamic load rating C is 31.9 kN and the basic static load rating C0 is 57 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-40-PPA",
      "NATR 40 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1500,
    "max_rpm": 1500
  },
  {
    "sku": "NATR-5",
    "brand": "SKF",
    "manufacturer_designation": "NATR 5",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.14,
    "static_load_kN": 3.2,
    "fatigue_load_limit_kN": 0.345,
    "weight_g": 14,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 16 mm outside diameter runs on the track while the 5 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 3.14 kN and C0 3.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.98 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.345 kN at 5 mm bore gives a specific load of 0.63 kN per mm; the limiting speed is 6,000 r/min the 12 mm width carries the load at 0.26 kN per mm of roller complement; section height 5.5 mm between bore and track surface determines the outer-ring bending stiffness mass 14 g over a 16x12 mm envelope works out to 0.073 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 5 mm bore this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms NATR adds pressed-on flange rings to the basic support roller; these locate the roller axially and absorb light side thrust, but they are not designed for continuous axial load typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 16 mm track diameter and 5 mm bore fit standard cam and rail geometries in packaging machine timing cams the 16 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 14 g mass is low enough for rapid indexing cycles do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
    "applications": [
      "paper mill web guide rollers",
      "textile machine cam drives",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-5?",
        "a": "NATR-5 is a support roller with flange rings, with inner ring with 16 mm outside diameter, 5 mm bore diameter and 12 mm overall width. The bore is 5 mm and the track contact diameter is 16 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 16x5x12 mm envelope and the 6000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-5?",
        "a": "The published basic dynamic load rating C is 3.14 kN and the basic static load rating C0 is 3.2 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-5",
      "NATR 5"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000
  },
  {
    "sku": "NATR-5-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 5 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.14,
    "static_load_kN": 3.2,
    "fatigue_load_limit_kN": 0.345,
    "weight_g": 14,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 16 mm outside diameter runs on the track while the 5 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 3.14 kN and C0 3.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.98 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.345 kN at 5 mm bore gives a specific load of 0.63 kN per mm; the limiting speed is 6,000 r/min the 12 mm width carries the load at 0.26 kN per mm of roller complement; section height 5.5 mm between bore and track surface determines the outer-ring bending stiffness mass 14 g over a 16x12 mm envelope works out to 0.073 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 5 mm bore places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium the NATR execution is the caged, flanged variant — cage guidance gives a higher limiting speed than the full-complement NATV, while the flanges simplify housing design by eliminating separate thrust faces the PPA variant has a crowned track surface: the 16 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 16 mm track diameter and 5 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 16 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 14 g mass is low enough for rapid indexing cycles the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
    "applications": [
      "textile machine cam drives",
      "automotive welding jig positioners",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-5-PPA?",
        "a": "NATR-5-PPA is a support roller with flange rings, with inner ring with 16 mm outside diameter, 5 mm bore diameter and 12 mm overall width. The bore is 5 mm and the track contact diameter is 16 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 16x5x12 mm envelope and the 6000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-5-PPA?",
        "a": "The published basic dynamic load rating C is 3.14 kN and the basic static load rating C0 is 3.2 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-5-PPA",
      "NATR 5 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000
  },
  {
    "sku": "NATR-50-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 50 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 30.8,
    "static_load_kN": 58.5,
    "fatigue_load_limit_kN": 7.2,
    "weight_g": 870,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 90 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 30.8 kN and C0 58.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.53 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 7.2 kN at 50 mm bore gives a specific load of 0.62 kN per mm; the limiting speed is 1,200 r/min the 32 mm width carries the load at 0.96 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 870 g over a 90x32 mm envelope works out to 0.302 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 50 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the NATR execution is the caged, flanged variant — cage guidance gives a higher limiting speed than the full-complement NATV, while the flanges simplify housing design by eliminating separate thrust faces the PPA variant has a crowned track surface: the 90 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 90 mm track diameter and 50 mm bore fit standard cam and rail geometries in packaging machine timing cams the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 870 g mass is low enough for rapid indexing cycles the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
    "applications": [
      "packaging machine timing cams",
      "textile machine cam drives",
      "glass processing line conveyors",
      "linear guide and track systems"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-50-PPA?",
        "a": "NATR-50-PPA is a support roller with flange rings, with inner ring with 90 mm outside diameter, 50 mm bore diameter and 32 mm overall width. The bore is 50 mm and the track contact diameter is 90 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 90x50x32 mm envelope and the 1200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-50-PPA?",
        "a": "The published basic dynamic load rating C is 30.8 kN and the basic static load rating C0 is 58.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-50-PPA",
      "NATR 50 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1200,
    "max_rpm": 1200
  },
  {
    "sku": "NATR-6",
    "brand": "SKF",
    "manufacturer_designation": "NATR 6",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.47,
    "static_load_kN": 3.8,
    "fatigue_load_limit_kN": 0.415,
    "weight_g": 20,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 19 mm outside diameter runs on the track while the 6 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 3.47 kN and C0 3.8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.91 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.415 kN at 6 mm bore gives a specific load of 0.58 kN per mm; the limiting speed is 5,600 r/min the 12 mm width carries the load at 0.29 kN per mm of roller complement; section height 6.5 mm between bore and track surface determines the outer-ring bending stiffness mass 20 g over a 19x12 mm envelope works out to 0.088 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 6 mm bore this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms the NATR prefix denotes the flanged support roller — two pressed steel flange rings on the 6 mm bore locate the needle roller complement laterally, so the roller can tolerate some track misalignment typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 19 mm track diameter and 6 mm bore fit standard cam and rail geometries in glass processing line conveyors the 19 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 20 g mass is low enough for rapid indexing cycles the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
    "applications": [
      "conveyor transfer and diverting rollers",
      "agricultural equipment cam followers",
      "woodworking machinery feed rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-6?",
        "a": "NATR-6 is a support roller with flange rings, with inner ring with 19 mm outside diameter, 6 mm bore diameter and 12 mm overall width. The bore is 6 mm and the track contact diameter is 19 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 19x6x12 mm envelope and the 5600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-6?",
        "a": "The published basic dynamic load rating C is 3.47 kN and the basic static load rating C0 is 3.8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-6",
      "NATR 6"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5600,
    "max_rpm": 5600
  },
  {
    "sku": "NATR-6-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 6 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.47,
    "static_load_kN": 3.8,
    "fatigue_load_limit_kN": 0.415,
    "weight_g": 19,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 19 mm outside diameter runs on the track while the 6 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 3.47 kN and C0 3.8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.91 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.415 kN at 6 mm bore gives a specific load of 0.58 kN per mm; the limiting speed is 5,600 r/min the 12 mm width carries the load at 0.29 kN per mm of roller complement; section height 6.5 mm between bore and track surface determines the outer-ring bending stiffness mass 19 g over a 19x12 mm envelope works out to 0.083 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 6 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely reading NATR: needle roller support roller with integral flange rings; the 19 mm outer ring runs on the track while the flanges keep the roller centred without separate thrust washers reading the PPA suffix: crowned outer ring — the track contact is barrel-shaped to tolerate angular misalignment between the roller axis and the track typical applications include sheet-metal forming press feeds, textile machine cam drives and agricultural equipment cam followers this size is commonly specified for sheet-metal forming press feeds and textile machine cam drives, where the 19 mm track diameter and 6 mm bore fit standard cam and rail geometries in agricultural equipment cam followers the 19 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 19 g mass is low enough for rapid indexing cycles the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
    "applications": [
      "agricultural equipment cam followers",
      "sheet-metal forming press feeds",
      "packaging machine timing cams",
      "glass processing line conveyors"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-6-PPA?",
        "a": "NATR-6-PPA is a support roller with flange rings, with inner ring with 19 mm outside diameter, 6 mm bore diameter and 12 mm overall width. The bore is 6 mm and the track contact diameter is 19 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 19x6x12 mm envelope and the 5600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-6-PPA?",
        "a": "The published basic dynamic load rating C is 3.47 kN and the basic static load rating C0 is 3.8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-6-PPA",
      "NATR 6 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5600,
    "max_rpm": 5600
  },
  {
    "sku": "NATR-8-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATR 8 PPA",
    "series": "NATR-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 5.28,
    "static_load_kN": 6.1,
    "fatigue_load_limit_kN": 0.695,
    "weight_g": 38,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 24 mm outside diameter runs on the track while the 8 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 5.28 kN and C0 6.1 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.87 is typical for support roller with flange rings, with inner ring executions fatigue load limit Pu 0.695 kN at 8 mm bore gives a specific load of 0.66 kN per mm; the limiting speed is 5,000 r/min the 15 mm width carries the load at 0.35 kN per mm of roller complement; section height 8.0 mm between bore and track surface determines the outer-ring bending stiffness mass 38 g over a 24x15 mm envelope works out to 0.106 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 8 mm bore places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium the NATR prefix denotes the flanged support roller — two pressed steel flange rings on the 8 mm bore locate the needle roller complement laterally, so the roller can tolerate some track misalignment PPA denotes the crowned running surface: the 24 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 24 mm track diameter and 8 mm bore fit standard cam and rail geometries in sheet-metal forming press feeds the 24 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 38 g mass is low enough for rapid indexing cycles the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
    "applications": [
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives",
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "the pressed-on flange rings are not designed for continuous axial load — side thrust from a skewed track will eventually dislodge them",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "cage guidance (NATR) is less tolerant of shock than full complement (NATV); heavy impact can crack the cage and release rollers into the mechanism",
      "the flange rings are a press fit on the inner ring; excessive axial preload during mounting can shift them and alter the internal clearance",
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "pitfalls": [
      "do not use the flange faces as thrust surfaces for external components — the pressed joint is designed for guidance, not for transmitting axial force",
      "the flanges reduce the available track width by their own thickness; check the cam channel width against the B dimension, not just the outer ring width",
      "the cage material is typically polyamide or steel; at temperatures above 100 degC polyamide cages soften and lose guidance function"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATR-8-PPA?",
        "a": "NATR-8-PPA is a support roller with flange rings, with inner ring with 24 mm outside diameter, 8 mm bore diameter and 15 mm overall width. The bore is 8 mm and the track contact diameter is 24 mm."
      },
      {
        "q": "What does the NATR designation mean?",
        "a": "The NATR prefix identifies this as a support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 24x8x15 mm envelope and the 5000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATR-8-PPA?",
        "a": "The published basic dynamic load rating C is 5.28 kN and the basic static load rating C0 is 6.1 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATR-8-PPA",
      "NATR 8 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000
  },
  {
    "sku": "NATV-10",
    "brand": "SKF",
    "manufacturer_designation": "NATV 10",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 8.97,
    "static_load_kN": 14.6,
    "fatigue_load_limit_kN": 1.66,
    "weight_g": 65,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 30 mm outside diameter runs on the track while the 10 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 8.97 kN and C0 14.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.61 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 1.66 kN at 10 mm bore gives a specific load of 0.90 kN per mm; the limiting speed is 3,200 r/min the 15 mm width carries the load at 0.60 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 65 g over a 30x15 mm envelope works out to 0.144 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty with a 10 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely the NATV prefix identifies a full-complement flanged support roller — ideal for slow, heavily loaded tracks where the cam profile generates high contact stress but the surface speed stays moderate typical applications include material handling lift and lower tracks, sheet-metal forming press feeds and textile machine cam drives this size is commonly specified for material handling lift and lower tracks and sheet-metal forming press feeds, where the 30 mm track diameter and 10 mm bore fit standard cam and rail geometries in textile machine cam drives the 30 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 65 g mass is low enough for rapid indexing cycles the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
    "applications": [
      "food processing line track rollers",
      "material handling lift and lower tracks",
      "printing press roller followers",
      "automotive welding jig positioners"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-10?",
        "a": "NATV-10 is a full-complement support roller with flange rings, with inner ring with 30 mm outside diameter, 10 mm bore diameter and 15 mm overall width. The bore is 10 mm and the track contact diameter is 30 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 30x10x15 mm envelope and the 3200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-10?",
        "a": "The published basic dynamic load rating C is 8.97 kN and the basic static load rating C0 is 14.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-10",
      "NATV 10"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3200,
    "max_rpm": 3200
  },
  {
    "sku": "NATV-10-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 10 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 8.97,
    "static_load_kN": 14.6,
    "fatigue_load_limit_kN": 1.66,
    "weight_g": 64,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 30 mm outside diameter runs on the track while the 10 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 8.97 kN and C0 14.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.61 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 1.66 kN at 10 mm bore gives a specific load of 0.90 kN per mm; the limiting speed is 3,200 r/min the 15 mm width carries the load at 0.60 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 64 g over a 30x15 mm envelope works out to 0.142 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty with a 10 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 30 mm envelope, traded against the reduced 3200 r/min speed limit PPA denotes the crowned running surface: the 30 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include food processing line track rollers, printing press roller followers and automotive welding jig positioners this size is commonly specified for food processing line track rollers and printing press roller followers, where the 30 mm track diameter and 10 mm bore fit standard cam and rail geometries in automotive welding jig positioners the 30 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 64 g mass is low enough for rapid indexing cycles the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
    "applications": [
      "packaging machine timing cams",
      "food processing line track rollers",
      "glass processing line conveyors",
      "linear guide and track systems"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-10-PPA?",
        "a": "NATV-10-PPA is a full-complement support roller with flange rings, with inner ring with 30 mm outside diameter, 10 mm bore diameter and 15 mm overall width. The bore is 10 mm and the track contact diameter is 30 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 30x10x15 mm envelope and the 3200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-10-PPA?",
        "a": "The published basic dynamic load rating C is 8.97 kN and the basic static load rating C0 is 14.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-10-PPA",
      "NATV 10 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3200,
    "max_rpm": 3200
  },
  {
    "sku": "NATV-12",
    "brand": "SKF",
    "manufacturer_designation": "NATV 12",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.35,
    "static_load_kN": 15.3,
    "fatigue_load_limit_kN": 1.76,
    "weight_g": 72,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 9.35 kN and C0 15.3 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.61 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 1.76 kN at 12 mm bore gives a specific load of 0.78 kN per mm; the limiting speed is 3,000 r/min the 15 mm width carries the load at 0.62 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 72 g over a 32x15 mm envelope works out to 0.150 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 12 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers reading NATV: cageless, fully rolled needle roller support roller; the extra rollers raise C0 to 15.3 kN for slow, heavy cam duty typical applications include food processing line track rollers, printing press roller followers and automotive welding jig positioners this size is commonly specified for food processing line track rollers and printing press roller followers, where the 32 mm track diameter and 12 mm bore fit standard cam and rail geometries in automotive welding jig positioners the 32 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 72 g mass is low enough for rapid indexing cycles the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
    "applications": [
      "material handling lift and lower tracks",
      "food processing line track rollers",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-12?",
        "a": "NATV-12 is a full-complement support roller with flange rings, with inner ring with 32 mm outside diameter, 12 mm bore diameter and 15 mm overall width. The bore is 12 mm and the track contact diameter is 32 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 32x12x15 mm envelope and the 3000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-12?",
        "a": "The published basic dynamic load rating C is 9.35 kN and the basic static load rating C0 is 15.3 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-12",
      "NATV 12"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3000,
    "max_rpm": 3000
  },
  {
    "sku": "NATV-12-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 12 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.35,
    "static_load_kN": 15.3,
    "fatigue_load_limit_kN": 1.76,
    "weight_g": 69,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 9.35 kN and C0 15.3 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.61 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 1.76 kN at 12 mm bore gives a specific load of 0.78 kN per mm; the limiting speed is 3,000 r/min the 15 mm width carries the load at 0.62 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 69 g over a 32x15 mm envelope works out to 0.144 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 12 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NATV is the full-complement counterpart of NATR: no cage, more needle rollers, higher static capacity C0 15.3 kN, but a lower limiting speed 3000 r/min because of roller-to-roller friction the PPA suffix specifies a crowned (radius) outer-ring running surface instead of the standard cylindrical profile — the crown distributes edge stress when the track is not perfectly aligned typical applications include packaging machine timing cams, glass processing line conveyors and linear guide and track systems this size is commonly specified for packaging machine timing cams and glass processing line conveyors, where the 32 mm track diameter and 12 mm bore fit standard cam and rail geometries in linear guide and track systems the 32 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 69 g mass is low enough for rapid indexing cycles the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
    "applications": [
      "food processing line track rollers",
      "packaging machine timing cams",
      "printing press roller followers",
      "automotive welding jig positioners"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-12-PPA?",
        "a": "NATV-12-PPA is a full-complement support roller with flange rings, with inner ring with 32 mm outside diameter, 12 mm bore diameter and 15 mm overall width. The bore is 12 mm and the track contact diameter is 32 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 32x12x15 mm envelope and the 3000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-12-PPA?",
        "a": "The published basic dynamic load rating C is 9.35 kN and the basic static load rating C0 is 15.3 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-12-PPA",
      "NATV 12 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3000,
    "max_rpm": 3000
  },
  {
    "sku": "NATV-15",
    "brand": "SKF",
    "manufacturer_designation": "NATV 15",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 12.3,
    "static_load_kN": 23.2,
    "fatigue_load_limit_kN": 2.7,
    "weight_g": 110,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 12.3 kN and C0 23.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.53 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 2.7 kN at 15 mm bore gives a specific load of 0.82 kN per mm; the limiting speed is 2,600 r/min the 19 mm width carries the load at 0.65 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 110 g over a 35x19 mm envelope works out to 0.165 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 15 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the NATV prefix identifies a full-complement flanged support roller — ideal for slow, heavily loaded tracks where the cam profile generates high contact stress but the surface speed stays moderate typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 110 g mass is low enough for rapid indexing cycles full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
    "applications": [
      "sheet-metal forming press feeds",
      "robotic arm track guidance",
      "textile machine cam drives",
      "agricultural equipment cam followers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-15?",
        "a": "NATV-15 is a full-complement support roller with flange rings, with inner ring with 35 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 35x15x19 mm envelope and the 2600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-15?",
        "a": "The published basic dynamic load rating C is 12.3 kN and the basic static load rating C0 is 23.2 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-15",
      "NATV 15"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600
  },
  {
    "sku": "NATV-15-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 15 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 12.3,
    "static_load_kN": 23.2,
    "fatigue_load_limit_kN": 2.7,
    "weight_g": 100,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 12.3 kN and C0 23.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.53 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 2.7 kN at 15 mm bore gives a specific load of 0.82 kN per mm; the limiting speed is 2,600 r/min the 19 mm width carries the load at 0.65 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 100 g over a 35x19 mm envelope works out to 0.150 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 15 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the NATV prefix identifies a full-complement flanged support roller — ideal for slow, heavily loaded tracks where the cam profile generates high contact stress but the surface speed stays moderate the PPA variant has a crowned track surface: the 35 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 100 g mass is low enough for rapid indexing cycles without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
    "applications": [
      "cam mechanisms and indexing drives",
      "conveyor transfer and diverting rollers",
      "material handling lift and lower tracks",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-15-PPA?",
        "a": "NATV-15-PPA is a full-complement support roller with flange rings, with inner ring with 35 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 35x15x19 mm envelope and the 2600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-15-PPA?",
        "a": "The published basic dynamic load rating C is 12.3 kN and the basic static load rating C0 is 23.2 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-15-PPA",
      "NATV 15 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600
  },
  {
    "sku": "NATV-17",
    "brand": "SKF",
    "manufacturer_designation": "NATV 17",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.2,
    "static_load_kN": 26.5,
    "fatigue_load_limit_kN": 3.1,
    "weight_g": 150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.2 kN and C0 26.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.54 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 3.1 kN at 17 mm bore gives a specific load of 0.84 kN per mm; the limiting speed is 2,200 r/min the 21 mm width carries the load at 0.68 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 150 g over a 40x21 mm envelope works out to 0.179 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 17 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads reading NATV: cageless, fully rolled needle roller support roller; the extra rollers raise C0 to 26.5 kN for slow, heavy cam duty typical applications include sheet-metal forming press feeds, textile machine cam drives and agricultural equipment cam followers this size is commonly specified for sheet-metal forming press feeds and textile machine cam drives, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in agricultural equipment cam followers the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 150 g mass is low enough for rapid indexing cycles in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
    "applications": [
      "robotic arm track guidance",
      "sheet-metal forming press feeds",
      "paper mill web guide rollers",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-17?",
        "a": "NATV-17 is a full-complement support roller with flange rings, with inner ring with 40 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 40x17x21 mm envelope and the 2200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-17?",
        "a": "The published basic dynamic load rating C is 14.2 kN and the basic static load rating C0 is 26.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-17",
      "NATV 17"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200
  },
  {
    "sku": "NATV-17-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 17 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.2,
    "static_load_kN": 26.5,
    "fatigue_load_limit_kN": 3.1,
    "weight_g": 150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.2 kN and C0 26.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.54 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 3.1 kN at 17 mm bore gives a specific load of 0.84 kN per mm; the limiting speed is 2,200 r/min the 21 mm width carries the load at 0.68 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 150 g over a 40x21 mm envelope works out to 0.179 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 17 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 40 mm envelope, traded against the reduced 2200 r/min speed limit PPA denotes the crowned running surface: the 40 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in sheet-metal forming press feeds the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 150 g mass is low enough for rapid indexing cycles without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
    "applications": [
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives",
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-17-PPA?",
        "a": "NATV-17-PPA is a full-complement support roller with flange rings, with inner ring with 40 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 40x17x21 mm envelope and the 2200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-17-PPA?",
        "a": "The published basic dynamic load rating C is 14.2 kN and the basic static load rating C0 is 26.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-17-PPA",
      "NATV 17 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200
  },
  {
    "sku": "NATV-20",
    "brand": "SKF",
    "manufacturer_designation": "NATV 20",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 19.4,
    "static_load_kN": 41.5,
    "fatigue_load_limit_kN": 5,
    "weight_g": 250,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19.4 kN and C0 41.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.47 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 5 kN at 20 mm bore gives a specific load of 0.97 kN per mm; the limiting speed is 1,900 r/min the 25 mm width carries the load at 0.78 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 250 g over a 47x25 mm envelope works out to 0.213 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 20 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 47 mm envelope, traded against the reduced 1900 r/min speed limit typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in glass processing line conveyors the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 250 g mass is low enough for rapid indexing cycles full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
    "applications": [
      "automatic assembly machine linkages",
      "agricultural equipment cam followers",
      "food processing line track rollers",
      "printing press roller followers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-20?",
        "a": "NATV-20 is a full-complement support roller with flange rings, with inner ring with 47 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 47x20x25 mm envelope and the 1900 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-20?",
        "a": "The published basic dynamic load rating C is 19.4 kN and the basic static load rating C0 is 41.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-20",
      "NATV 20"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1900,
    "max_rpm": 1900
  },
  {
    "sku": "NATV-20-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 20 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 19.4,
    "static_load_kN": 41.5,
    "fatigue_load_limit_kN": 5,
    "weight_g": 250,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19.4 kN and C0 41.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.47 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 5 kN at 20 mm bore gives a specific load of 0.97 kN per mm; the limiting speed is 1,900 r/min the 25 mm width carries the load at 0.78 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 250 g over a 47x25 mm envelope works out to 0.213 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 20 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers NATV drops the cage to pack the maximum number of needle rollers into the 47 mm envelope; the result is the highest static capacity of the flanged support rollers, at the cost of increased friction and heat PPA changes the outer-ring profile from cylindrical to crowned; the barrel shape lowers edge stress when the cam track is not perfectly parallel to the roller axis typical applications include sheet-metal forming press feeds, textile machine cam drives and agricultural equipment cam followers this size is commonly specified for sheet-metal forming press feeds and textile machine cam drives, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in agricultural equipment cam followers the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 250 g mass is low enough for rapid indexing cycles without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
    "applications": [
      "robotic arm track guidance",
      "sheet-metal forming press feeds",
      "paper mill web guide rollers",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-20-PPA?",
        "a": "NATV-20-PPA is a full-complement support roller with flange rings, with inner ring with 47 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 47x20x25 mm envelope and the 1900 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-20-PPA?",
        "a": "The published basic dynamic load rating C is 19.4 kN and the basic static load rating C0 is 41.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-20-PPA",
      "NATV 20 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1900,
    "max_rpm": 1900
  },
  {
    "sku": "NATV-25",
    "brand": "SKF",
    "manufacturer_designation": "NATV 25",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 19.8,
    "static_load_kN": 44,
    "fatigue_load_limit_kN": 5.3,
    "weight_g": 290,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19.8 kN and C0 44 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.45 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 5.3 kN at 25 mm bore gives a specific load of 0.79 kN per mm; the limiting speed is 1,600 r/min the 25 mm width carries the load at 0.79 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 290 g over a 52x25 mm envelope works out to 0.223 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 25 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the NATV prefix identifies a full-complement flanged support roller — ideal for slow, heavily loaded tracks where the cam profile generates high contact stress but the surface speed stays moderate typical applications include packaging machine timing cams, glass processing line conveyors and linear guide and track systems this size is commonly specified for packaging machine timing cams and glass processing line conveyors, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in linear guide and track systems the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 290 g mass is low enough for rapid indexing cycles the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
    "applications": [
      "textile machine cam drives",
      "packaging machine timing cams",
      "agricultural equipment cam followers",
      "glass processing line conveyors"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-25?",
        "a": "NATV-25 is a full-complement support roller with flange rings, with inner ring with 52 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 52x25x25 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-25?",
        "a": "The published basic dynamic load rating C is 19.8 kN and the basic static load rating C0 is 44 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-25",
      "NATV 25"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "NATV-25-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 25 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 19.8,
    "static_load_kN": 44,
    "fatigue_load_limit_kN": 5.3,
    "weight_g": 280,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19.8 kN and C0 44 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.45 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 5.3 kN at 25 mm bore gives a specific load of 0.79 kN per mm; the limiting speed is 1,600 r/min the 25 mm width carries the load at 0.79 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 280 g over a 52x25 mm envelope works out to 0.215 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 25 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NATV drops the cage to pack the maximum number of needle rollers into the 52 mm envelope; the result is the highest static capacity of the flanged support rollers, at the cost of increased friction and heat PPA changes the outer-ring profile from cylindrical to crowned; the barrel shape lowers edge stress when the cam track is not perfectly parallel to the roller axis typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 280 g mass is low enough for rapid indexing cycles full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
    "applications": [
      "automotive welding jig positioners",
      "linear guide and track systems",
      "conveyor transfer and diverting rollers",
      "woodworking machinery feed rollers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-25-PPA?",
        "a": "NATV-25-PPA is a full-complement support roller with flange rings, with inner ring with 52 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 52x25x25 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-25-PPA?",
        "a": "The published basic dynamic load rating C is 19.8 kN and the basic static load rating C0 is 44 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-25-PPA",
      "NATV 25 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "NATV-30",
    "brand": "SKF",
    "manufacturer_designation": "NATV 30",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 29.2,
    "static_load_kN": 62,
    "fatigue_load_limit_kN": 7.65,
    "weight_g": 480,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 29.2 kN and C0 62 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.47 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 7.65 kN at 30 mm bore gives a specific load of 0.97 kN per mm; the limiting speed is 1,400 r/min the 29 mm width carries the load at 1.01 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 480 g over a 62x29 mm envelope works out to 0.267 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 30 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 62 mm envelope, traded against the reduced 1400 r/min speed limit typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in packaging machine timing cams the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 480 g mass is low enough for rapid indexing cycles the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
    "applications": [
      "paper mill web guide rollers",
      "textile machine cam drives",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-30?",
        "a": "NATV-30 is a full-complement support roller with flange rings, with inner ring with 62 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 62x30x29 mm envelope and the 1400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-30?",
        "a": "The published basic dynamic load rating C is 29.2 kN and the basic static load rating C0 is 62 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-30",
      "NATV 30"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400
  },
  {
    "sku": "NATV-30-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 30 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 29.2,
    "static_load_kN": 62,
    "fatigue_load_limit_kN": 7.65,
    "weight_g": 470,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 29.2 kN and C0 62 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.47 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 7.65 kN at 30 mm bore gives a specific load of 0.97 kN per mm; the limiting speed is 1,400 r/min the 29 mm width carries the load at 1.01 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 470 g over a 62x29 mm envelope works out to 0.261 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 30 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the NATV prefix identifies a full-complement flanged support roller — ideal for slow, heavily loaded tracks where the cam profile generates high contact stress but the surface speed stays moderate the PPA variant has a crowned track surface: the 62 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 470 g mass is low enough for rapid indexing cycles full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
    "applications": [
      "textile machine cam drives",
      "automotive welding jig positioners",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-30-PPA?",
        "a": "NATV-30-PPA is a full-complement support roller with flange rings, with inner ring with 62 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 62x30x29 mm envelope and the 1400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-30-PPA?",
        "a": "The published basic dynamic load rating C is 29.2 kN and the basic static load rating C0 is 62 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-30-PPA",
      "NATV 30 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1400,
    "max_rpm": 1400
  },
  {
    "sku": "NATV-35-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 35 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 31.9,
    "static_load_kN": 72,
    "fatigue_load_limit_kN": 8.8,
    "weight_g": 630,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 31.9 kN and C0 72 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.44 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 8.8 kN at 35 mm bore gives a specific load of 0.91 kN per mm; the limiting speed is 1,100 r/min the 29 mm width carries the load at 1.10 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 630 g over a 72x29 mm envelope works out to 0.302 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 35 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 72 mm envelope, traded against the reduced 1100 r/min speed limit PPA denotes the crowned running surface: the 72 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 630 g mass is low enough for rapid indexing cycles without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
    "applications": [
      "glass processing line conveyors",
      "robotic arm track guidance",
      "linear guide and track systems",
      "paper mill web guide rollers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-35-PPA?",
        "a": "NATV-35-PPA is a full-complement support roller with flange rings, with inner ring with 72 mm outside diameter, 35 mm bore diameter and 29 mm overall width. The bore is 35 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 72x35x29 mm envelope and the 1100 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-35-PPA?",
        "a": "The published basic dynamic load rating C is 31.9 kN and the basic static load rating C0 is 72 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-35-PPA",
      "NATV 35 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1100,
    "max_rpm": 1100
  },
  {
    "sku": "NATV-40-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 40 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 39.1,
    "static_load_kN": 88,
    "fatigue_load_limit_kN": 11,
    "weight_g": 830,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 39.1 kN and C0 88 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.44 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 11 kN at 40 mm bore gives a specific load of 0.98 kN per mm; the limiting speed is 950 r/min the 32 mm width carries the load at 1.22 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 830 g over a 80x32 mm envelope works out to 0.324 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 40 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 80 mm envelope, traded against the reduced 950 r/min speed limit PPA denotes the crowned running surface: the 80 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 830 g mass is low enough for rapid indexing cycles without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
    "applications": [
      "glass processing line conveyors",
      "printing press roller followers",
      "linear guide and track systems",
      "robotic arm track guidance"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-40-PPA?",
        "a": "NATV-40-PPA is a full-complement support roller with flange rings, with inner ring with 80 mm outside diameter, 40 mm bore diameter and 32 mm overall width. The bore is 40 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 80x40x32 mm envelope and the 950 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-40-PPA?",
        "a": "The published basic dynamic load rating C is 39.1 kN and the basic static load rating C0 is 88 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-40-PPA",
      "NATV 40 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 950,
    "max_rpm": 950
  },
  {
    "sku": "NATV-5",
    "brand": "SKF",
    "manufacturer_designation": "NATV 5",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 4.73,
    "static_load_kN": 6.55,
    "fatigue_load_limit_kN": 0.72,
    "weight_g": 15,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 16 mm outside diameter runs on the track while the 5 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.73 kN and C0 6.55 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.72 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 0.72 kN at 5 mm bore gives a specific load of 0.95 kN per mm; the limiting speed is 4,300 r/min the 12 mm width carries the load at 0.39 kN per mm of roller complement; section height 5.5 mm between bore and track surface determines the outer-ring bending stiffness mass 15 g over a 16x12 mm envelope works out to 0.078 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 5 mm bore places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium reading NATV: cageless, fully rolled needle roller support roller; the extra rollers raise C0 to 6.55 kN for slow, heavy cam duty typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 16 mm track diameter and 5 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 16 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 15 g mass is low enough for rapid indexing cycles full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
    "applications": [
      "packaging machine timing cams",
      "linear guide and track systems",
      "glass processing line conveyors",
      "robotic arm track guidance"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-5?",
        "a": "NATV-5 is a full-complement support roller with flange rings, with inner ring with 16 mm outside diameter, 5 mm bore diameter and 12 mm overall width. The bore is 5 mm and the track contact diameter is 16 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 16x5x12 mm envelope and the 4300 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-5?",
        "a": "The published basic dynamic load rating C is 4.73 kN and the basic static load rating C0 is 6.55 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-5",
      "NATV 5"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4300,
    "max_rpm": 4300
  },
  {
    "sku": "NATV-5-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 5 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 5,
    "D_mm": 16,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 4.73,
    "static_load_kN": 6.55,
    "fatigue_load_limit_kN": 0.72,
    "weight_g": 15,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 16 mm outside diameter runs on the track while the 5 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.73 kN and C0 6.55 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.72 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 0.72 kN at 5 mm bore gives a specific load of 0.95 kN per mm; the limiting speed is 4,300 r/min the 12 mm width carries the load at 0.39 kN per mm of roller complement; section height 5.5 mm between bore and track surface determines the outer-ring bending stiffness mass 15 g over a 16x12 mm envelope works out to 0.078 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty with a 5 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely reading NATV: cageless, fully rolled needle roller support roller; the extra rollers raise C0 to 6.55 kN for slow, heavy cam duty reading the PPA suffix: crowned outer ring — the track contact is barrel-shaped to tolerate angular misalignment between the roller axis and the track typical applications include paper mill web guide rollers, automatic assembly machine linkages and food processing line track rollers this size is commonly specified for paper mill web guide rollers and automatic assembly machine linkages, where the 16 mm track diameter and 5 mm bore fit standard cam and rail geometries in food processing line track rollers the 16 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 15 g mass is low enough for rapid indexing cycles full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
    "applications": [
      "linear guide and track systems",
      "paper mill web guide rollers",
      "robotic arm track guidance",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-5-PPA?",
        "a": "NATV-5-PPA is a full-complement support roller with flange rings, with inner ring with 16 mm outside diameter, 5 mm bore diameter and 12 mm overall width. The bore is 5 mm and the track contact diameter is 16 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 16x5x12 mm envelope and the 4300 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-5-PPA?",
        "a": "The published basic dynamic load rating C is 4.73 kN and the basic static load rating C0 is 6.55 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-5-PPA",
      "NATV 5 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4300,
    "max_rpm": 4300
  },
  {
    "sku": "NATV-50-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 50 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 39.1,
    "static_load_kN": 93,
    "fatigue_load_limit_kN": 11.6,
    "weight_g": 970,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 90 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 39.1 kN and C0 93 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.42 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 11.6 kN at 50 mm bore gives a specific load of 0.78 kN per mm; the limiting speed is 850 r/min the 32 mm width carries the load at 1.22 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 970 g over a 90x32 mm envelope works out to 0.337 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 50 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 90 mm envelope, traded against the reduced 850 r/min speed limit PPA denotes the crowned running surface: the 90 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 90 mm track diameter and 50 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 970 g mass is low enough for rapid indexing cycles full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
    "applications": [
      "material handling lift and lower tracks",
      "linear guide and track systems",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-50-PPA?",
        "a": "NATV-50-PPA is a full-complement support roller with flange rings, with inner ring with 90 mm outside diameter, 50 mm bore diameter and 32 mm overall width. The bore is 50 mm and the track contact diameter is 90 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 90x50x32 mm envelope and the 850 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-50-PPA?",
        "a": "The published basic dynamic load rating C is 39.1 kN and the basic static load rating C0 is 93 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-50-PPA",
      "NATV 50 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 850,
    "max_rpm": 850
  },
  {
    "sku": "NATV-6",
    "brand": "SKF",
    "manufacturer_designation": "NATV 6",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 5.28,
    "static_load_kN": 8,
    "fatigue_load_limit_kN": 0.88,
    "weight_g": 21,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 19 mm outside diameter runs on the track while the 6 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 5.28 kN and C0 8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.66 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 0.88 kN at 6 mm bore gives a specific load of 0.88 kN per mm; the limiting speed is 4,000 r/min the 12 mm width carries the load at 0.44 kN per mm of roller complement; section height 6.5 mm between bore and track surface determines the outer-ring bending stiffness mass 21 g over a 19x12 mm envelope works out to 0.092 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 6 mm bore places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium NATV is the full-complement counterpart of NATR: no cage, more needle rollers, higher static capacity C0 8 kN, but a lower limiting speed 4000 r/min because of roller-to-roller friction typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 19 mm track diameter and 6 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 19 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 21 g mass is low enough for rapid indexing cycles without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
    "applications": [
      "automatic assembly machine linkages",
      "robotic arm track guidance",
      "food processing line track rollers",
      "printing press roller followers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-6?",
        "a": "NATV-6 is a full-complement support roller with flange rings, with inner ring with 19 mm outside diameter, 6 mm bore diameter and 12 mm overall width. The bore is 6 mm and the track contact diameter is 19 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 19x6x12 mm envelope and the 4000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-6?",
        "a": "The published basic dynamic load rating C is 5.28 kN and the basic static load rating C0 is 8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-6",
      "NATV 6"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4000,
    "max_rpm": 4000
  },
  {
    "sku": "NATV-6-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 6 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 5.28,
    "static_load_kN": 8,
    "fatigue_load_limit_kN": 0.88,
    "weight_g": 21,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 19 mm outside diameter runs on the track while the 6 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 5.28 kN and C0 8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.66 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 0.88 kN at 6 mm bore gives a specific load of 0.88 kN per mm; the limiting speed is 4,000 r/min the 12 mm width carries the load at 0.44 kN per mm of roller complement; section height 6.5 mm between bore and track surface determines the outer-ring bending stiffness mass 21 g over a 19x12 mm envelope works out to 0.092 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 6 mm bore this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms the NATV designation means full complement of needle rollers with flange rings — maximum load capacity in the 19 mm envelope, traded against the reduced 4000 r/min speed limit PPA denotes the crowned running surface: the 19 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 19 mm track diameter and 6 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 19 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 21 g mass is low enough for rapid indexing cycles in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
    "applications": [
      "robotic arm track guidance",
      "conveyor transfer and diverting rollers",
      "paper mill web guide rollers",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-6-PPA?",
        "a": "NATV-6-PPA is a full-complement support roller with flange rings, with inner ring with 19 mm outside diameter, 6 mm bore diameter and 12 mm overall width. The bore is 6 mm and the track contact diameter is 19 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 19x6x12 mm envelope and the 4000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-6-PPA?",
        "a": "The published basic dynamic load rating C is 5.28 kN and the basic static load rating C0 is 8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-6-PPA",
      "NATV 6 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4000,
    "max_rpm": 4000
  },
  {
    "sku": "NATV-8",
    "brand": "SKF",
    "manufacturer_designation": "NATV 8",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.48,
    "static_load_kN": 11.4,
    "fatigue_load_limit_kN": 1.32,
    "weight_g": 42,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 24 mm outside diameter runs on the track while the 8 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 7.48 kN and C0 11.4 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.66 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 1.32 kN at 8 mm bore gives a specific load of 0.94 kN per mm; the limiting speed is 3,600 r/min the 15 mm width carries the load at 0.50 kN per mm of roller complement; section height 8.0 mm between bore and track surface determines the outer-ring bending stiffness mass 42 g over a 24x15 mm envelope works out to 0.117 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 8 mm bore this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms reading NATV: cageless, fully rolled needle roller support roller; the extra rollers raise C0 to 11.4 kN for slow, heavy cam duty typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 24 mm track diameter and 8 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 24 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 42 g mass is low enough for rapid indexing cycles full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
    "applications": [
      "printing press roller followers",
      "conveyor transfer and diverting rollers",
      "automotive welding jig positioners",
      "woodworking machinery feed rollers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-8?",
        "a": "NATV-8 is a full-complement support roller with flange rings, with inner ring with 24 mm outside diameter, 8 mm bore diameter and 15 mm overall width. The bore is 8 mm and the track contact diameter is 24 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 24x8x15 mm envelope and the 3600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-8?",
        "a": "The published basic dynamic load rating C is 7.48 kN and the basic static load rating C0 is 11.4 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-8",
      "NATV 8"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3600,
    "max_rpm": 3600
  },
  {
    "sku": "NATV-8-PPA",
    "brand": "SKF",
    "manufacturer_designation": "NATV 8 PPA",
    "series": "NATV-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 15,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 7.48,
    "static_load_kN": 11.4,
    "fatigue_load_limit_kN": 1.32,
    "weight_g": 41,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 24 mm outside diameter runs on the track while the 8 mm bore takes the pin or shaft; the 15 mm overall width spreads the Hertzian contact over the outer ring published ratings C 7.48 kN and C0 11.4 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.66 is typical for full-complement support roller with flange rings, with inner ring executions fatigue load limit Pu 1.32 kN at 8 mm bore gives a specific load of 0.94 kN per mm; the limiting speed is 3,600 r/min the 15 mm width carries the load at 0.50 kN per mm of roller complement; section height 8.0 mm between bore and track surface determines the outer-ring bending stiffness mass 41 g over a 24x15 mm envelope works out to 0.114 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 8 mm bore places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium NATV drops the cage to pack the maximum number of needle rollers into the 24 mm envelope; the result is the highest static capacity of the flanged support rollers, at the cost of increased friction and heat PPA changes the outer-ring profile from cylindrical to crowned; the barrel shape lowers edge stress when the cam track is not perfectly parallel to the roller axis typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 24 mm track diameter and 8 mm bore fit standard cam and rail geometries in glass processing line conveyors the 24 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 41 g mass is low enough for rapid indexing cycles in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
    "applications": [
      "automatic assembly machine linkages",
      "agricultural equipment cam followers",
      "food processing line track rollers",
      "printing press roller followers"
    ],
    "failure_modes": [
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion",
      "without a cage the rollers can skew under momentary unloading, leading to edge loading and premature raceway pitting",
      "the higher static capacity invites overloading; remember the dynamic C rating still governs fatigue life",
      "full complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track",
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution"
    ],
    "pitfalls": [
      "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed",
      "in oscillating applications the rollers can brinell if the stroke is too short to rotate the full complement; ensure the motion profile rotates the rollers through at least one full revolution",
      "full-complement rollers generate more friction and heat — the lower limiting speed is a hard thermal limit, not a suggestion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NATV-8-PPA?",
        "a": "NATV-8-PPA is a full-complement support roller with flange rings, with inner ring with 24 mm outside diameter, 8 mm bore diameter and 15 mm overall width. The bore is 8 mm and the track contact diameter is 24 mm."
      },
      {
        "q": "What does the NATV designation mean?",
        "a": "The NATV prefix identifies this as a full-complement support roller with flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 24x8x15 mm envelope and the 3600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NATV-8-PPA?",
        "a": "The published basic dynamic load rating C is 7.48 kN and the basic static load rating C0 is 11.4 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NATV",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NATV-8-PPA",
      "NATV 8 PPA"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3600,
    "max_rpm": 3600
  },
  {
    "sku": "NUTR-15-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 15 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.8,
    "static_load_kN": 17.6,
    "fatigue_load_limit_kN": 2,
    "weight_g": 99,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 16.8 kN and C0 17.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.95 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 2 kN at 15 mm bore gives a specific load of 1.12 kN per mm; the limiting speed is 5,000 r/min the 19 mm width carries the load at 0.88 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 99 g over a 35x19 mm envelope works out to 0.149 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 15 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers NUTR is the heavy-duty support roller: two full rows of cylindrical rollers without a cage give the maximum dynamic capacity for the 35 mm envelope, but the outer ring relies entirely on the pressed-on flanges for axial location the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include glass processing line conveyors, linear guide and track systems and robotic arm track guidance this size is commonly specified for glass processing line conveyors and linear guide and track systems, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in robotic arm track guidance the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 99 g mass is low enough for rapid indexing cycles the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
    "applications": [
      "robotic arm track guidance",
      "glass processing line conveyors",
      "paper mill web guide rollers",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-15-A?",
        "a": "NUTR-15-A is a double-row full-complement support roller, no integral flange with 35 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 35x15x19 mm envelope and the 5000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-15-A?",
        "a": "The published basic dynamic load rating C is 16.8 kN and the basic static load rating C0 is 17.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-15-A",
      "NUTR 15 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000
  },
  {
    "sku": "NUTR-1542-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 1542 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 42,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 20.1,
    "static_load_kN": 23.2,
    "fatigue_load_limit_kN": 2.65,
    "weight_g": 160,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 42 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 20.1 kN and C0 23.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.87 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 2.65 kN at 15 mm bore gives a specific load of 1.34 kN per mm; the limiting speed is 5,000 r/min the 19 mm width carries the load at 1.06 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 160 g over a 42x19 mm envelope works out to 0.201 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 15 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers reading NUTR: twin-row cylindrical roller support roller, no cage, no integral flange; the 42 mm track surface and 15 mm bore carry the heaviest radial ratings in this catalogue section reading the A suffix: improved design execution with optimised roller complement and surface finish for better performance at the same envelope dimensions typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 42 mm track diameter and 15 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 42 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 160 g mass is low enough for rapid indexing cycles the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
    "applications": [
      "sheet-metal forming press feeds",
      "printing press roller followers",
      "textile machine cam drives",
      "agricultural equipment cam followers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-1542-A?",
        "a": "NUTR-1542-A is a double-row full-complement support roller, no integral flange with 42 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 42 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 42x15x19 mm envelope and the 5000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-1542-A?",
        "a": "The published basic dynamic load rating C is 20.1 kN and the basic static load rating C0 is 23.2 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-1542-A",
      "NUTR 1542 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000
  },
  {
    "sku": "NUTR-17-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 17 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 19,
    "static_load_kN": 22,
    "fatigue_load_limit_kN": 2.5,
    "weight_g": 150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 19 kN and C0 22 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.86 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 2.5 kN at 17 mm bore gives a specific load of 1.12 kN per mm; the limiting speed is 4,500 r/min the 21 mm width carries the load at 0.90 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 150 g over a 40x21 mm envelope works out to 0.179 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 17 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the NUTR prefix identifies double-row full-complement cylindrical rollers — the outer ring is axially guided by the pressed-on flange rings via the roller ends, and the 21 mm width houses two roller complements A marks the enhanced version of this double-row full-complement support roller, no integral flange — refined roller guidance and raceway finish give lower running temperature and longer grease life typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 150 g mass is low enough for rapid indexing cycles the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
    "applications": [
      "glass processing line conveyors",
      "robotic arm track guidance",
      "linear guide and track systems",
      "paper mill web guide rollers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-17-A?",
        "a": "NUTR-17-A is a double-row full-complement support roller, no integral flange with 40 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 40x17x21 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-17-A?",
        "a": "The published basic dynamic load rating C is 19 kN and the basic static load rating C0 is 22 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-17-A",
      "NUTR 17 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "NUTR-1747-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 1747 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 47,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 22,
    "static_load_kN": 27,
    "fatigue_load_limit_kN": 3.05,
    "weight_g": 220,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22 kN and C0 27 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 3.05 kN at 17 mm bore gives a specific load of 1.29 kN per mm; the limiting speed is 4,500 r/min the 21 mm width carries the load at 1.05 kN per mm of roller complement; section height 15.0 mm between bore and track surface determines the outer-ring bending stiffness mass 220 g over a 47x21 mm envelope works out to 0.223 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 17 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the NUTR prefix identifies double-row full-complement cylindrical rollers — the outer ring is axially guided by the pressed-on flange rings via the roller ends, and the 21 mm width houses two roller complements A marks the enhanced version of this double-row full-complement support roller, no integral flange — refined roller guidance and raceway finish give lower running temperature and longer grease life typical applications include woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 47 mm track diameter and 17 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 220 g mass is low enough for rapid indexing cycles the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
    "applications": [
      "material handling lift and lower tracks",
      "woodworking machinery feed rollers",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-1747-A?",
        "a": "NUTR-1747-A is a double-row full-complement support roller, no integral flange with 47 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 47x17x21 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-1747-A?",
        "a": "The published basic dynamic load rating C is 22 kN and the basic static load rating C0 is 27 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-1747-A",
      "NUTR 1747 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "NUTR-20-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 20 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 28.6,
    "static_load_kN": 33.5,
    "fatigue_load_limit_kN": 3.9,
    "weight_g": 250,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 28.6 kN and C0 33.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.85 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 3.9 kN at 20 mm bore gives a specific load of 1.43 kN per mm; the limiting speed is 3,800 r/min the 25 mm width carries the load at 1.14 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 250 g over a 47x25 mm envelope works out to 0.213 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers reading NUTR: twin-row cylindrical roller support roller, no cage, no integral flange; the 47 mm track surface and 20 mm bore carry the heaviest radial ratings in this catalogue section reading the A suffix: improved design execution with optimised roller complement and surface finish for better performance at the same envelope dimensions typical applications include automatic assembly machine linkages, food processing line track rollers and printing press roller followers this size is commonly specified for automatic assembly machine linkages and food processing line track rollers, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in printing press roller followers the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 250 g mass is low enough for rapid indexing cycles the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
    "applications": [
      "cam mechanisms and indexing drives",
      "automatic assembly machine linkages",
      "material handling lift and lower tracks",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-20-A?",
        "a": "NUTR-20-A is a double-row full-complement support roller, no integral flange with 47 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 47x20x25 mm envelope and the 3800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-20-A?",
        "a": "The published basic dynamic load rating C is 28.6 kN and the basic static load rating C0 is 33.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-20-A",
      "NUTR 20 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800
  },
  {
    "sku": "NUTR-2052-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 2052 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 31.9,
    "static_load_kN": 39,
    "fatigue_load_limit_kN": 4.55,
    "weight_g": 320,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 31.9 kN and C0 39 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.82 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 4.55 kN at 20 mm bore gives a specific load of 1.59 kN per mm; the limiting speed is 3,800 r/min the 25 mm width carries the load at 1.28 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 320 g over a 52x25 mm envelope works out to 0.246 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers NUTR names a double-row full-complement cylindrical roller support roller: two roller sets carry the radial load, giving the highest C 31.9 kN of the 52 mm sizes, but there is no integral flange between the rows the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 52 mm track diameter and 20 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 320 g mass is low enough for rapid indexing cycles the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
    "applications": [
      "paper mill web guide rollers",
      "woodworking machinery feed rollers",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-2052-A?",
        "a": "NUTR-2052-A is a double-row full-complement support roller, no integral flange with 52 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 52x20x25 mm envelope and the 3800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-2052-A?",
        "a": "The published basic dynamic load rating C is 31.9 kN and the basic static load rating C0 is 39 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-2052-A",
      "NUTR 2052 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800
  },
  {
    "sku": "NUTR-25-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 25 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 29.7,
    "static_load_kN": 36,
    "fatigue_load_limit_kN": 4.25,
    "weight_g": 280,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 29.7 kN and C0 36 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.82 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 4.25 kN at 25 mm bore gives a specific load of 1.19 kN per mm; the limiting speed is 3,200 r/min the 25 mm width carries the load at 1.19 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 280 g over a 52x25 mm envelope works out to 0.215 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 25 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NUTR is the heavy-duty support roller: two full rows of cylindrical rollers without a cage give the maximum dynamic capacity for the 52 mm envelope, but the outer ring relies entirely on the pressed-on flanges for axial location the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 280 g mass is low enough for rapid indexing cycles the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
    "applications": [
      "automotive welding jig positioners",
      "linear guide and track systems",
      "conveyor transfer and diverting rollers",
      "woodworking machinery feed rollers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-25-A?",
        "a": "NUTR-25-A is a double-row full-complement support roller, no integral flange with 52 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 52x25x25 mm envelope and the 3200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-25-A?",
        "a": "The published basic dynamic load rating C is 29.7 kN and the basic static load rating C0 is 36 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-25-A",
      "NUTR 25 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3200,
    "max_rpm": 3200
  },
  {
    "sku": "NUTR-2562-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 2562 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 62,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 35.8,
    "static_load_kN": 48,
    "fatigue_load_limit_kN": 5.6,
    "weight_g": 450,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 35.8 kN and C0 48 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.75 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 5.6 kN at 25 mm bore gives a specific load of 1.43 kN per mm; the limiting speed is 3,200 r/min the 25 mm width carries the load at 1.43 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 450 g over a 62x25 mm envelope works out to 0.290 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 25 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads reading NUTR: twin-row cylindrical roller support roller, no cage, no integral flange; the 62 mm track surface and 25 mm bore carry the heaviest radial ratings in this catalogue section reading the A suffix: improved design execution with optimised roller complement and surface finish for better performance at the same envelope dimensions typical applications include food processing line track rollers, printing press roller followers and automotive welding jig positioners this size is commonly specified for food processing line track rollers and printing press roller followers, where the 62 mm track diameter and 25 mm bore fit standard cam and rail geometries in automotive welding jig positioners the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 450 g mass is low enough for rapid indexing cycles the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
    "applications": [
      "paper mill web guide rollers",
      "food processing line track rollers",
      "automatic assembly machine linkages",
      "printing press roller followers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-2562-A?",
        "a": "NUTR-2562-A is a double-row full-complement support roller, no integral flange with 62 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 62x25x25 mm envelope and the 3200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-2562-A?",
        "a": "The published basic dynamic load rating C is 35.8 kN and the basic static load rating C0 is 48 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-2562-A",
      "NUTR 2562 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3200,
    "max_rpm": 3200
  },
  {
    "sku": "NUTR-30-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 30 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 41.3,
    "static_load_kN": 47.5,
    "fatigue_load_limit_kN": 5.85,
    "weight_g": 470,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 41.3 kN and C0 47.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.87 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 5.85 kN at 30 mm bore gives a specific load of 1.38 kN per mm; the limiting speed is 2,600 r/min the 29 mm width carries the load at 1.42 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 470 g over a 62x29 mm envelope works out to 0.261 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 30 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs NUTR names a double-row full-complement cylindrical roller support roller: two roller sets carry the radial load, giving the highest C 41.3 kN of the 62 mm sizes, but there is no integral flange between the rows the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 470 g mass is low enough for rapid indexing cycles the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
    "applications": [
      "textile machine cam drives",
      "automotive welding jig positioners",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-30-A?",
        "a": "NUTR-30-A is a double-row full-complement support roller, no integral flange with 62 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 62x30x29 mm envelope and the 2600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-30-A?",
        "a": "The published basic dynamic load rating C is 41.3 kN and the basic static load rating C0 is 47.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-30-A",
      "NUTR 30 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600
  },
  {
    "sku": "NUTR-3072-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 3072 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 48.4,
    "static_load_kN": 61,
    "fatigue_load_limit_kN": 7.5,
    "weight_g": 700,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 48.4 kN and C0 61 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.79 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 7.5 kN at 30 mm bore gives a specific load of 1.61 kN per mm; the limiting speed is 2,600 r/min the 29 mm width carries the load at 1.67 kN per mm of roller complement; section height 21.0 mm between bore and track surface determines the outer-ring bending stiffness mass 700 g over a 72x29 mm envelope works out to 0.335 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty with a 30 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity reading NUTR: twin-row cylindrical roller support roller, no cage, no integral flange; the 72 mm track surface and 30 mm bore carry the heaviest radial ratings in this catalogue section reading the A suffix: improved design execution with optimised roller complement and surface finish for better performance at the same envelope dimensions typical applications include automatic assembly machine linkages, food processing line track rollers and printing press roller followers this size is commonly specified for automatic assembly machine linkages and food processing line track rollers, where the 72 mm track diameter and 30 mm bore fit standard cam and rail geometries in printing press roller followers the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 700 g mass is low enough for rapid indexing cycles the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
    "applications": [
      "robotic arm track guidance",
      "automatic assembly machine linkages",
      "paper mill web guide rollers",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-3072-A?",
        "a": "NUTR-3072-A is a double-row full-complement support roller, no integral flange with 72 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 72x30x29 mm envelope and the 2600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-3072-A?",
        "a": "The published basic dynamic load rating C is 48.4 kN and the basic static load rating C0 is 61 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-3072-A",
      "NUTR 3072 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600
  },
  {
    "sku": "NUTR-35-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 35 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 45.7,
    "static_load_kN": 57,
    "fatigue_load_limit_kN": 6.95,
    "weight_g": 630,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 45.7 kN and C0 57 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.80 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 6.95 kN at 35 mm bore gives a specific load of 1.31 kN per mm; the limiting speed is 2,000 r/min the 29 mm width carries the load at 1.58 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 630 g over a 72x29 mm envelope works out to 0.302 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 35 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs NUTR is the heavy-duty support roller: two full rows of cylindrical rollers without a cage give the maximum dynamic capacity for the 72 mm envelope, but the outer ring relies entirely on the pressed-on flanges for axial location the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in sheet-metal forming press feeds the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 630 g mass is low enough for rapid indexing cycles the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
    "applications": [
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives",
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-35-A?",
        "a": "NUTR-35-A is a double-row full-complement support roller, no integral flange with 72 mm outside diameter, 35 mm bore diameter and 29 mm overall width. The bore is 35 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 72x35x29 mm envelope and the 2000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-35-A?",
        "a": "The published basic dynamic load rating C is 45.7 kN and the basic static load rating C0 is 57 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-35-A",
      "NUTR 35 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2000,
    "max_rpm": 2000
  },
  {
    "sku": "NUTR-3580-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 3580 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 80,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 51.2,
    "static_load_kN": 68,
    "fatigue_load_limit_kN": 8.3,
    "weight_g": 840,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 51.2 kN and C0 68 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.75 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 8.3 kN at 35 mm bore gives a specific load of 1.46 kN per mm; the limiting speed is 2,000 r/min the 29 mm width carries the load at 1.77 kN per mm of roller complement; section height 22.5 mm between bore and track surface determines the outer-ring bending stiffness mass 840 g over a 80x29 mm envelope works out to 0.362 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 35 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs NUTR names a double-row full-complement cylindrical roller support roller: two roller sets carry the radial load, giving the highest C 51.2 kN of the 80 mm sizes, but there is no integral flange between the rows the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 80 mm track diameter and 35 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 840 g mass is low enough for rapid indexing cycles the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
    "applications": [
      "glass processing line conveyors",
      "robotic arm track guidance",
      "linear guide and track systems",
      "paper mill web guide rollers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-3580-A?",
        "a": "NUTR-3580-A is a double-row full-complement support roller, no integral flange with 80 mm outside diameter, 35 mm bore diameter and 29 mm overall width. The bore is 35 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 80x35x29 mm envelope and the 2000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-3580-A?",
        "a": "The published basic dynamic load rating C is 51.2 kN and the basic static load rating C0 is 68 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-3580-A",
      "NUTR 3580 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2000,
    "max_rpm": 2000
  },
  {
    "sku": "NUTR-40-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 40 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 57.2,
    "static_load_kN": 72,
    "fatigue_load_limit_kN": 9,
    "weight_g": 820,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 57.2 kN and C0 72 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.79 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 9 kN at 40 mm bore gives a specific load of 1.43 kN per mm; the limiting speed is 1,800 r/min the 32 mm width carries the load at 1.79 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 820 g over a 80x32 mm envelope works out to 0.320 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 40 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the NUTR prefix identifies double-row full-complement cylindrical rollers — the outer ring is axially guided by the pressed-on flange rings via the roller ends, and the 32 mm width houses two roller complements A marks the enhanced version of this double-row full-complement support roller, no integral flange — refined roller guidance and raceway finish give lower running temperature and longer grease life typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in glass processing line conveyors the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 820 g mass is low enough for rapid indexing cycles the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
    "applications": [
      "conveyor transfer and diverting rollers",
      "agricultural equipment cam followers",
      "woodworking machinery feed rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-40-A?",
        "a": "NUTR-40-A is a double-row full-complement support roller, no integral flange with 80 mm outside diameter, 40 mm bore diameter and 32 mm overall width. The bore is 40 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 80x40x32 mm envelope and the 1800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-40-A?",
        "a": "The published basic dynamic load rating C is 57.2 kN and the basic static load rating C0 is 72 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-40-A",
      "NUTR 40 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800
  },
  {
    "sku": "NUTR-4090-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 4090 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 68.2,
    "static_load_kN": 91.5,
    "fatigue_load_limit_kN": 11.4,
    "weight_g": 1150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 90 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 68.2 kN and C0 91.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.75 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 11.4 kN at 40 mm bore gives a specific load of 1.71 kN per mm; the limiting speed is 1,800 r/min the 32 mm width carries the load at 2.13 kN per mm of roller complement; section height 25.0 mm between bore and track surface determines the outer-ring bending stiffness mass 1150 g over a 90x32 mm envelope works out to 0.399 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 40 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the NUTR prefix identifies double-row full-complement cylindrical rollers — the outer ring is axially guided by the pressed-on flange rings via the roller ends, and the 32 mm width houses two roller complements A marks the enhanced version of this double-row full-complement support roller, no integral flange — refined roller guidance and raceway finish give lower running temperature and longer grease life typical applications include woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 90 mm track diameter and 40 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1150 g mass is low enough for rapid indexing cycles the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
    "applications": [
      "paper mill web guide rollers",
      "woodworking machinery feed rollers",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-4090-A?",
        "a": "NUTR-4090-A is a double-row full-complement support roller, no integral flange with 90 mm outside diameter, 40 mm bore diameter and 32 mm overall width. The bore is 40 mm and the track contact diameter is 90 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 90x40x32 mm envelope and the 1800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-4090-A?",
        "a": "The published basic dynamic load rating C is 68.2 kN and the basic static load rating C0 is 91.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-4090-A",
      "NUTR 4090 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800
  },
  {
    "sku": "NUTR-45-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 45 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 85,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 58.3,
    "static_load_kN": 75,
    "fatigue_load_limit_kN": 9.3,
    "weight_g": 880,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 85 mm outside diameter runs on the track while the 45 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 58.3 kN and C0 75 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.78 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 9.3 kN at 45 mm bore gives a specific load of 1.30 kN per mm; the limiting speed is 1,700 r/min the 32 mm width carries the load at 1.82 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 880 g over a 85x32 mm envelope works out to 0.324 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 45 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads NUTR names a double-row full-complement cylindrical roller support roller: two roller sets carry the radial load, giving the highest C 58.3 kN of the 85 mm sizes, but there is no integral flange between the rows the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include paper mill web guide rollers, automatic assembly machine linkages and food processing line track rollers this size is commonly specified for paper mill web guide rollers and automatic assembly machine linkages, where the 85 mm track diameter and 45 mm bore fit standard cam and rail geometries in food processing line track rollers the 85 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 880 g mass is low enough for rapid indexing cycles the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
    "applications": [
      "textile machine cam drives",
      "paper mill web guide rollers",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-45-A?",
        "a": "NUTR-45-A is a double-row full-complement support roller, no integral flange with 85 mm outside diameter, 45 mm bore diameter and 32 mm overall width. The bore is 45 mm and the track contact diameter is 85 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 85x45x32 mm envelope and the 1700 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-45-A?",
        "a": "The published basic dynamic load rating C is 58.3 kN and the basic static load rating C0 is 75 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-45-A",
      "NUTR 45 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1700,
    "max_rpm": 1700
  },
  {
    "sku": "NUTR-45100-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 45100 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 100,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 73.7,
    "static_load_kN": 104,
    "fatigue_load_limit_kN": 12.7,
    "weight_g": 1400,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 100 mm outside diameter runs on the track while the 45 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 73.7 kN and C0 104 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.71 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 12.7 kN at 45 mm bore gives a specific load of 1.64 kN per mm; the limiting speed is 1,700 r/min the 32 mm width carries the load at 2.30 kN per mm of roller complement; section height 27.5 mm between bore and track surface determines the outer-ring bending stiffness mass 1400 g over a 100x32 mm envelope works out to 0.438 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 45 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the NUTR prefix identifies double-row full-complement cylindrical rollers — the outer ring is axially guided by the pressed-on flange rings via the roller ends, and the 32 mm width houses two roller complements A marks the enhanced version of this double-row full-complement support roller, no integral flange — refined roller guidance and raceway finish give lower running temperature and longer grease life typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 100 mm track diameter and 45 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 100 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1400 g mass is low enough for rapid indexing cycles the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
    "applications": [
      "agricultural equipment cam followers",
      "conveyor transfer and diverting rollers",
      "packaging machine timing cams",
      "glass processing line conveyors"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-45100-A?",
        "a": "NUTR-45100-A is a double-row full-complement support roller, no integral flange with 100 mm outside diameter, 45 mm bore diameter and 32 mm overall width. The bore is 45 mm and the track contact diameter is 100 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 100x45x32 mm envelope and the 1700 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-45100-A?",
        "a": "The published basic dynamic load rating C is 73.7 kN and the basic static load rating C0 is 104 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-45100-A",
      "NUTR 45100 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1700,
    "max_rpm": 1700
  },
  {
    "sku": "NUTR-50-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 50 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 58.3,
    "static_load_kN": 78,
    "fatigue_load_limit_kN": 9.65,
    "weight_g": 950,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 90 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 58.3 kN and C0 78 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.75 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 9.65 kN at 50 mm bore gives a specific load of 1.17 kN per mm; the limiting speed is 1,600 r/min the 32 mm width carries the load at 1.82 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 950 g over a 90x32 mm envelope works out to 0.330 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 50 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the NUTR prefix identifies double-row full-complement cylindrical rollers — the outer ring is axially guided by the pressed-on flange rings via the roller ends, and the 32 mm width houses two roller complements A marks the enhanced version of this double-row full-complement support roller, no integral flange — refined roller guidance and raceway finish give lower running temperature and longer grease life typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 90 mm track diameter and 50 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 950 g mass is low enough for rapid indexing cycles the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
    "applications": [
      "material handling lift and lower tracks",
      "linear guide and track systems",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-50-A?",
        "a": "NUTR-50-A is a double-row full-complement support roller, no integral flange with 90 mm outside diameter, 50 mm bore diameter and 32 mm overall width. The bore is 50 mm and the track contact diameter is 90 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 90x50x32 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-50-A?",
        "a": "The published basic dynamic load rating C is 58.3 kN and the basic static load rating C0 is 78 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-50-A",
      "NUTR 50 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "NUTR-50110-A",
    "brand": "SKF",
    "manufacturer_designation": "NUTR 50110 A",
    "series": "NUTR-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 110,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 78.1,
    "static_load_kN": 116,
    "fatigue_load_limit_kN": 14.3,
    "weight_g": 1700,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 110 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 78.1 kN and C0 116 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.67 is typical for double-row full-complement support roller, no integral flange executions fatigue load limit Pu 14.3 kN at 50 mm bore gives a specific load of 1.56 kN per mm; the limiting speed is 1,600 r/min the 32 mm width carries the load at 2.44 kN per mm of roller complement; section height 30.0 mm between bore and track surface determines the outer-ring bending stiffness mass 1700 g over a 110x32 mm envelope works out to 0.483 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 50 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity NUTR is the heavy-duty support roller: two full rows of cylindrical rollers without a cage give the maximum dynamic capacity for the 110 mm envelope, but the outer ring relies entirely on the pressed-on flanges for axial location the A suffix denotes the improved design: optimised internal geometry and surface finish raise the limiting speed and reduce friction compared with the earlier execution typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 110 mm track diameter and 50 mm bore fit standard cam and rail geometries in packaging machine timing cams the 110 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1700 g mass is low enough for rapid indexing cycles relubrication is difficult because the roller rows are packed; follow the greasing interval strictly the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
    "applications": [
      "paper mill web guide rollers",
      "textile machine cam drives",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load",
      "the double-row full complement is sensitive to misalignment; a bent shaft or angled track creates uneven load between the rows and early spalling",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the two roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life",
      "the heavy section and full complement make this the stiffest support roller — any shaft deflection directly increases edge stress",
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension"
    ],
    "pitfalls": [
      "the double-row construction is the widest in the support roller range; verify the track channel width accommodates the full B dimension",
      "relubrication is difficult because the roller rows are packed; follow the greasing interval strictly",
      "the outer ring has no integral flange between the two roller rows — axial guidance depends entirely on the pressed-on flange rings, which can shift under heavy side load"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the NUTR-50110-A?",
        "a": "NUTR-50110-A is a double-row full-complement support roller, no integral flange with 110 mm outside diameter, 50 mm bore diameter and 32 mm overall width. The bore is 50 mm and the track contact diameter is 110 mm."
      },
      {
        "q": "What does the NUTR designation mean?",
        "a": "The NUTR prefix identifies this as a double-row full-complement support roller, no integral flange. In the SKF catalogue this designation carries the full specification including the 110x50x32 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of NUTR-50110-A?",
        "a": "The published basic dynamic load rating C is 78.1 kN and the basic static load rating C0 is 116 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "NUTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "NUTR-50110-A",
      "NUTR 50110 A"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "PWTR-15-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 15.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 11.9,
    "static_load_kN": 11.4,
    "fatigue_load_limit_kN": 1.2,
    "weight_g": 99,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 11.9 kN and C0 11.4 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 1.04 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 1.2 kN at 15 mm bore gives a specific load of 0.79 kN per mm; the limiting speed is 5,000 r/min the 19 mm width carries the load at 0.63 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 99 g over a 35x19 mm envelope works out to 0.149 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 15 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the PWTR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the support roller range typical applications include paper mill web guide rollers, automatic assembly machine linkages and food processing line track rollers this size is commonly specified for paper mill web guide rollers and automatic assembly machine linkages, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in food processing line track rollers the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 99 g mass is low enough for rapid indexing cycles the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
    "applications": [
      "textile machine cam drives",
      "paper mill web guide rollers",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-15.2RS?",
        "a": "PWTR-15.2RS is a sealed double-row full-complement support roller with integral flanges with 35 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 35x15x19 mm envelope and the 5000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-15.2RS?",
        "a": "The published basic dynamic load rating C is 11.9 kN and the basic static load rating C0 is 11.4 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-15-2RS",
      "PWTR 15.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000
  },
  {
    "sku": "PWTR-1542-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 1542.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 42,
    "B_mm": 19,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.2,
    "static_load_kN": 15,
    "fatigue_load_limit_kN": 1.6,
    "weight_g": 160,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 42 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 19 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.2 kN and C0 15 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.95 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 1.6 kN at 15 mm bore gives a specific load of 0.95 kN per mm; the limiting speed is 5,000 r/min the 19 mm width carries the load at 0.75 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 160 g over a 42x19 mm envelope works out to 0.201 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 15 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the PWTR prefix marks the sealed version of the double-row full-complement design — the 19 mm width encloses two cylindrical roller sets with integral flanges and rubbing seals typical applications include woodworking machinery feed rollers, cam mechanisms and indexing drives and material handling lift and lower tracks this size is commonly specified for woodworking machinery feed rollers and cam mechanisms and indexing drives, where the 42 mm track diameter and 15 mm bore fit standard cam and rail geometries in material handling lift and lower tracks the 42 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 160 g mass is low enough for rapid indexing cycles sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
    "applications": [
      "automotive welding jig positioners",
      "woodworking machinery feed rollers",
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-1542.2RS?",
        "a": "PWTR-1542.2RS is a sealed double-row full-complement support roller with integral flanges with 42 mm outside diameter, 15 mm bore diameter and 19 mm overall width. The bore is 15 mm and the track contact diameter is 42 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 42x15x19 mm envelope and the 5000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-1542.2RS?",
        "a": "The published basic dynamic load rating C is 14.2 kN and the basic static load rating C0 is 15 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-1542-2RS",
      "PWTR 1542.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000
  },
  {
    "sku": "PWTR-17-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 17.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 13.8,
    "static_load_kN": 14.3,
    "fatigue_load_limit_kN": 1.5,
    "weight_g": 150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 13.8 kN and C0 14.3 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.97 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 1.5 kN at 17 mm bore gives a specific load of 0.81 kN per mm; the limiting speed is 4,500 r/min the 21 mm width carries the load at 0.66 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 150 g over a 40x21 mm envelope works out to 0.179 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 17 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the PWTR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the support roller range typical applications include food processing line track rollers, printing press roller followers and automotive welding jig positioners this size is commonly specified for food processing line track rollers and printing press roller followers, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in automotive welding jig positioners the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 150 g mass is low enough for rapid indexing cycles the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
    "applications": [
      "material handling lift and lower tracks",
      "food processing line track rollers",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-17.2RS?",
        "a": "PWTR-17.2RS is a sealed double-row full-complement support roller with integral flanges with 40 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 40x17x21 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-17.2RS?",
        "a": "The published basic dynamic load rating C is 13.8 kN and the basic static load rating C0 is 14.3 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-17-2RS",
      "PWTR 17.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "PWTR-1747-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 1747.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 47,
    "B_mm": 21,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 15.7,
    "static_load_kN": 17.6,
    "fatigue_load_limit_kN": 1.86,
    "weight_g": 220,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 21 mm overall width spreads the Hertzian contact over the outer ring published ratings C 15.7 kN and C0 17.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.89 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 1.86 kN at 17 mm bore gives a specific load of 0.92 kN per mm; the limiting speed is 4,500 r/min the 21 mm width carries the load at 0.75 kN per mm of roller complement; section height 15.0 mm between bore and track surface determines the outer-ring bending stiffness mass 220 g over a 47x21 mm envelope works out to 0.223 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 17 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers PWTR denotes the sealed double-row full-complement cylindrical roller support roller: integral flanges and 2RS contact seals make it a greased-for-life unit for dirty or inaccessible positions typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 47 mm track diameter and 17 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 220 g mass is low enough for rapid indexing cycles the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
    "applications": [
      "glass processing line conveyors",
      "printing press roller followers",
      "linear guide and track systems",
      "robotic arm track guidance"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-1747.2RS?",
        "a": "PWTR-1747.2RS is a sealed double-row full-complement support roller with integral flanges with 47 mm outside diameter, 17 mm bore diameter and 21 mm overall width. The bore is 17 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 47x17x21 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-1747.2RS?",
        "a": "The published basic dynamic load rating C is 15.7 kN and the basic static load rating C0 is 17.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-1747-2RS",
      "PWTR 1747.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "PWTR-20-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 20.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 22.9,
    "static_load_kN": 24.5,
    "fatigue_load_limit_kN": 2.8,
    "weight_g": 250,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22.9 kN and C0 24.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.93 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 2.8 kN at 20 mm bore gives a specific load of 1.15 kN per mm; the limiting speed is 3,800 r/min the 25 mm width carries the load at 0.92 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 250 g over a 47x25 mm envelope works out to 0.213 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers PWTR is the maintenance-free heavy support roller: the twin-row full complement is sealed on both sides with NBR contact lips, eliminating relubrication and excluding contamination typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 250 g mass is low enough for rapid indexing cycles the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
    "applications": [
      "food processing line track rollers",
      "automotive welding jig positioners",
      "printing press roller followers",
      "conveyor transfer and diverting rollers"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-20.2RS?",
        "a": "PWTR-20.2RS is a sealed double-row full-complement support roller with integral flanges with 47 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 47x20x25 mm envelope and the 3800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-20.2RS?",
        "a": "The published basic dynamic load rating C is 22.9 kN and the basic static load rating C0 is 24.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-20-2RS",
      "PWTR 20.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800
  },
  {
    "sku": "PWTR-2052-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 2052.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 25.5,
    "static_load_kN": 29,
    "fatigue_load_limit_kN": 3.35,
    "weight_g": 320,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 25.5 kN and C0 29 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 3.35 kN at 20 mm bore gives a specific load of 1.27 kN per mm; the limiting speed is 3,800 r/min the 25 mm width carries the load at 1.02 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 320 g over a 52x25 mm envelope works out to 0.246 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the PWTR prefix marks the sealed version of the double-row full-complement design — the 25 mm width encloses two cylindrical roller sets with integral flanges and rubbing seals typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 52 mm track diameter and 20 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 320 g mass is low enough for rapid indexing cycles the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
    "applications": [
      "conveyor transfer and diverting rollers",
      "printing press roller followers",
      "woodworking machinery feed rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-2052.2RS?",
        "a": "PWTR-2052.2RS is a sealed double-row full-complement support roller with integral flanges with 52 mm outside diameter, 20 mm bore diameter and 25 mm overall width. The bore is 20 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 52x20x25 mm envelope and the 3800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-2052.2RS?",
        "a": "The published basic dynamic load rating C is 25.5 kN and the basic static load rating C0 is 29 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-2052-2RS",
      "PWTR 2052.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3800,
    "max_rpm": 3800
  },
  {
    "sku": "PWTR-25-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 25.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.8,
    "static_load_kN": 26.5,
    "fatigue_load_limit_kN": 3.05,
    "weight_g": 280,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 23.8 kN and C0 26.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.90 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 3.05 kN at 25 mm bore gives a specific load of 0.95 kN per mm; the limiting speed is 3,200 r/min the 25 mm width carries the load at 0.95 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 280 g over a 52x25 mm envelope works out to 0.215 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 25 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers PWTR is the maintenance-free heavy support roller: the twin-row full complement is sealed on both sides with NBR contact lips, eliminating relubrication and excluding contamination typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in glass processing line conveyors the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 280 g mass is low enough for rapid indexing cycles the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
    "applications": [
      "sheet-metal forming press feeds",
      "agricultural equipment cam followers",
      "textile machine cam drives",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-25.2RS?",
        "a": "PWTR-25.2RS is a sealed double-row full-complement support roller with integral flanges with 52 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 52x25x25 mm envelope and the 3200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-25.2RS?",
        "a": "The published basic dynamic load rating C is 23.8 kN and the basic static load rating C0 is 26.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-25-2RS",
      "PWTR 25.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3200,
    "max_rpm": 3200
  },
  {
    "sku": "PWTR-2562-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 2562.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 62,
    "B_mm": 25,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 29.2,
    "static_load_kN": 36,
    "fatigue_load_limit_kN": 4.05,
    "weight_g": 450,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 25 mm overall width spreads the Hertzian contact over the outer ring published ratings C 29.2 kN and C0 36 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 4.05 kN at 25 mm bore gives a specific load of 1.17 kN per mm; the limiting speed is 3,200 r/min the 25 mm width carries the load at 1.17 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 450 g over a 62x25 mm envelope works out to 0.290 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 25 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads reading PWTR..2RS: sealed twin-row cylindrical roller support roller; the integral flanges and contact seals protect the 62 mm track roller from wash-down and dust typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 62 mm track diameter and 25 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 450 g mass is low enough for rapid indexing cycles the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
    "applications": [
      "conveyor transfer and diverting rollers",
      "robotic arm track guidance",
      "woodworking machinery feed rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-2562.2RS?",
        "a": "PWTR-2562.2RS is a sealed double-row full-complement support roller with integral flanges with 62 mm outside diameter, 25 mm bore diameter and 25 mm overall width. The bore is 25 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 62x25x25 mm envelope and the 3200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-2562.2RS?",
        "a": "The published basic dynamic load rating C is 29.2 kN and the basic static load rating C0 is 36 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-2562-2RS",
      "PWTR 2562.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3200,
    "max_rpm": 3200
  },
  {
    "sku": "PWTR-30-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 30.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 31.9,
    "static_load_kN": 32.5,
    "fatigue_load_limit_kN": 4.05,
    "weight_g": 470,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 31.9 kN and C0 32.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.98 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 4.05 kN at 30 mm bore gives a specific load of 1.06 kN per mm; the limiting speed is 2,600 r/min the 29 mm width carries the load at 1.10 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 470 g over a 62x29 mm envelope works out to 0.261 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 30 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the PWTR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the support roller range typical applications include automatic assembly machine linkages, food processing line track rollers and printing press roller followers this size is commonly specified for automatic assembly machine linkages and food processing line track rollers, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in printing press roller followers the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 470 g mass is low enough for rapid indexing cycles the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
    "applications": [
      "robotic arm track guidance",
      "automatic assembly machine linkages",
      "paper mill web guide rollers",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-30.2RS?",
        "a": "PWTR-30.2RS is a sealed double-row full-complement support roller with integral flanges with 62 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 62x30x29 mm envelope and the 2600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-30.2RS?",
        "a": "The published basic dynamic load rating C is 31.9 kN and the basic static load rating C0 is 32.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-30-2RS",
      "PWTR 30.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600
  },
  {
    "sku": "PWTR-3072-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 3072.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 39.6,
    "static_load_kN": 45,
    "fatigue_load_limit_kN": 5.6,
    "weight_g": 700,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 39.6 kN and C0 45 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 5.6 kN at 30 mm bore gives a specific load of 1.32 kN per mm; the limiting speed is 2,000 r/min the 29 mm width carries the load at 1.37 kN per mm of roller complement; section height 21.0 mm between bore and track surface determines the outer-ring bending stiffness mass 700 g over a 72x29 mm envelope works out to 0.335 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 30 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads reading PWTR..2RS: sealed twin-row cylindrical roller support roller; the integral flanges and contact seals protect the 72 mm track roller from wash-down and dust typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 72 mm track diameter and 30 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 700 g mass is low enough for rapid indexing cycles the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
    "applications": [
      "textile machine cam drives",
      "automotive welding jig positioners",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-3072.2RS?",
        "a": "PWTR-3072.2RS is a sealed double-row full-complement support roller with integral flanges with 72 mm outside diameter, 30 mm bore diameter and 29 mm overall width. The bore is 30 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 72x30x29 mm envelope and the 2000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-3072.2RS?",
        "a": "The published basic dynamic load rating C is 39.6 kN and the basic static load rating C0 is 45 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-3072-2RS",
      "PWTR 3072.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2000,
    "max_rpm": 2000
  },
  {
    "sku": "PWTR-35-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 35.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 35.8,
    "static_load_kN": 40.5,
    "fatigue_load_limit_kN": 5,
    "weight_g": 630,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 35.8 kN and C0 40.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 5 kN at 35 mm bore gives a specific load of 1.02 kN per mm; the limiting speed is 2,000 r/min the 29 mm width carries the load at 1.23 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 630 g over a 72x29 mm envelope works out to 0.302 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 35 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs PWTR denotes the sealed double-row full-complement cylindrical roller support roller: integral flanges and 2RS contact seals make it a greased-for-life unit for dirty or inaccessible positions typical applications include textile machine cam drives, agricultural equipment cam followers and packaging machine timing cams this size is commonly specified for textile machine cam drives and agricultural equipment cam followers, where the 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in packaging machine timing cams the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 630 g mass is low enough for rapid indexing cycles the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
    "applications": [
      "paper mill web guide rollers",
      "textile machine cam drives",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-35.2RS?",
        "a": "PWTR-35.2RS is a sealed double-row full-complement support roller with integral flanges with 72 mm outside diameter, 35 mm bore diameter and 29 mm overall width. The bore is 35 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 72x35x29 mm envelope and the 2000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-35.2RS?",
        "a": "The published basic dynamic load rating C is 35.8 kN and the basic static load rating C0 is 40.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-35-2RS",
      "PWTR 35.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2000,
    "max_rpm": 2000
  },
  {
    "sku": "PWTR-3580-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 3580.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 80,
    "B_mm": 29,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 41.8,
    "static_load_kN": 50,
    "fatigue_load_limit_kN": 6.3,
    "weight_g": 840,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 29 mm overall width spreads the Hertzian contact over the outer ring published ratings C 41.8 kN and C0 50 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.84 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 6.3 kN at 35 mm bore gives a specific load of 1.19 kN per mm; the limiting speed is 2,000 r/min the 29 mm width carries the load at 1.44 kN per mm of roller complement; section height 22.5 mm between bore and track surface determines the outer-ring bending stiffness mass 840 g over a 80x29 mm envelope works out to 0.362 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 35 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the PWTR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the support roller range typical applications include food processing line track rollers, printing press roller followers and automotive welding jig positioners this size is commonly specified for food processing line track rollers and printing press roller followers, where the 80 mm track diameter and 35 mm bore fit standard cam and rail geometries in automotive welding jig positioners the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 840 g mass is low enough for rapid indexing cycles the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
    "applications": [
      "material handling lift and lower tracks",
      "food processing line track rollers",
      "sheet-metal forming press feeds",
      "textile machine cam drives"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-3580.2RS?",
        "a": "PWTR-3580.2RS is a sealed double-row full-complement support roller with integral flanges with 80 mm outside diameter, 35 mm bore diameter and 29 mm overall width. The bore is 35 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 80x35x29 mm envelope and the 2000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-3580.2RS?",
        "a": "The published basic dynamic load rating C is 41.8 kN and the basic static load rating C0 is 50 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-3580-2RS",
      "PWTR 3580.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2000,
    "max_rpm": 2000
  },
  {
    "sku": "PWTR-40-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 40.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 41.8,
    "static_load_kN": 49,
    "fatigue_load_limit_kN": 6,
    "weight_g": 820,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 41.8 kN and C0 49 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.85 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 6 kN at 40 mm bore gives a specific load of 1.04 kN per mm; the limiting speed is 1,800 r/min the 32 mm width carries the load at 1.31 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 820 g over a 80x32 mm envelope works out to 0.320 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 40 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity reading PWTR..2RS: sealed twin-row cylindrical roller support roller; the integral flanges and contact seals protect the 80 mm track roller from wash-down and dust typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 820 g mass is low enough for rapid indexing cycles sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
    "applications": [
      "paper mill web guide rollers",
      "linear guide and track systems",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-40.2RS?",
        "a": "PWTR-40.2RS is a sealed double-row full-complement support roller with integral flanges with 80 mm outside diameter, 40 mm bore diameter and 32 mm overall width. The bore is 40 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 80x40x32 mm envelope and the 1800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-40.2RS?",
        "a": "The published basic dynamic load rating C is 41.8 kN and the basic static load rating C0 is 49 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-40-2RS",
      "PWTR 40.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800
  },
  {
    "sku": "PWTR-4090-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 4090.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 49.5,
    "static_load_kN": 62,
    "fatigue_load_limit_kN": 7.65,
    "weight_g": 1150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 90 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 49.5 kN and C0 62 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.80 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 7.65 kN at 40 mm bore gives a specific load of 1.24 kN per mm; the limiting speed is 1,800 r/min the 32 mm width carries the load at 1.55 kN per mm of roller complement; section height 25.0 mm between bore and track surface determines the outer-ring bending stiffness mass 1150 g over a 90x32 mm envelope works out to 0.399 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 40 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads PWTR denotes the sealed double-row full-complement cylindrical roller support roller: integral flanges and 2RS contact seals make it a greased-for-life unit for dirty or inaccessible positions typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 90 mm track diameter and 40 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1150 g mass is low enough for rapid indexing cycles the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
    "applications": [
      "conveyor transfer and diverting rollers",
      "printing press roller followers",
      "woodworking machinery feed rollers",
      "cam mechanisms and indexing drives"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-4090.2RS?",
        "a": "PWTR-4090.2RS is a sealed double-row full-complement support roller with integral flanges with 90 mm outside diameter, 40 mm bore diameter and 32 mm overall width. The bore is 40 mm and the track contact diameter is 90 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 90x40x32 mm envelope and the 1800 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-4090.2RS?",
        "a": "The published basic dynamic load rating C is 49.5 kN and the basic static load rating C0 is 62 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-4090-2RS",
      "PWTR 4090.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1800,
    "max_rpm": 1800
  },
  {
    "sku": "PWTR-45-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 45.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 85,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 42.9,
    "static_load_kN": 50,
    "fatigue_load_limit_kN": 6.2,
    "weight_g": 880,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 85 mm outside diameter runs on the track while the 45 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 42.9 kN and C0 50 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.86 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 6.2 kN at 45 mm bore gives a specific load of 0.95 kN per mm; the limiting speed is 1,700 r/min the 32 mm width carries the load at 1.34 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 880 g over a 85x32 mm envelope works out to 0.324 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 45 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads reading PWTR..2RS: sealed twin-row cylindrical roller support roller; the integral flanges and contact seals protect the 85 mm track roller from wash-down and dust typical applications include glass processing line conveyors, linear guide and track systems and robotic arm track guidance this size is commonly specified for glass processing line conveyors and linear guide and track systems, where the 85 mm track diameter and 45 mm bore fit standard cam and rail geometries in robotic arm track guidance the 85 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 880 g mass is low enough for rapid indexing cycles the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
    "applications": [
      "robotic arm track guidance",
      "glass processing line conveyors",
      "paper mill web guide rollers",
      "automatic assembly machine linkages"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-45.2RS?",
        "a": "PWTR-45.2RS is a sealed double-row full-complement support roller with integral flanges with 85 mm outside diameter, 45 mm bore diameter and 32 mm overall width. The bore is 45 mm and the track contact diameter is 85 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 85x45x32 mm envelope and the 1700 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-45.2RS?",
        "a": "The published basic dynamic load rating C is 42.9 kN and the basic static load rating C0 is 50 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-45-2RS",
      "PWTR 45.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1700,
    "max_rpm": 1700
  },
  {
    "sku": "PWTR-45100-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 45100.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 45,
    "D_mm": 100,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 53.9,
    "static_load_kN": 69.5,
    "fatigue_load_limit_kN": 8.65,
    "weight_g": 1400,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 100 mm outside diameter runs on the track while the 45 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 53.9 kN and C0 69.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.78 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 8.65 kN at 45 mm bore gives a specific load of 1.20 kN per mm; the limiting speed is 1,700 r/min the 32 mm width carries the load at 1.68 kN per mm of roller complement; section height 27.5 mm between bore and track surface determines the outer-ring bending stiffness mass 1400 g over a 100x32 mm envelope works out to 0.438 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 45 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads PWTR is the maintenance-free heavy support roller: the twin-row full complement is sealed on both sides with NBR contact lips, eliminating relubrication and excluding contamination typical applications include material handling lift and lower tracks, sheet-metal forming press feeds and textile machine cam drives this size is commonly specified for material handling lift and lower tracks and sheet-metal forming press feeds, where the 100 mm track diameter and 45 mm bore fit standard cam and rail geometries in textile machine cam drives the 100 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1400 g mass is low enough for rapid indexing cycles the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
    "applications": [
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks",
      "cam mechanisms and indexing drives",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-45100.2RS?",
        "a": "PWTR-45100.2RS is a sealed double-row full-complement support roller with integral flanges with 100 mm outside diameter, 45 mm bore diameter and 32 mm overall width. The bore is 45 mm and the track contact diameter is 100 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 100x45x32 mm envelope and the 1700 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-45100.2RS?",
        "a": "The published basic dynamic load rating C is 53.9 kN and the basic static load rating C0 is 69.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-45100-2RS",
      "PWTR 45100.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1700,
    "max_rpm": 1700
  },
  {
    "sku": "PWTR-50-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 50.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 90,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 42.9,
    "static_load_kN": 52,
    "fatigue_load_limit_kN": 6.55,
    "weight_g": 950,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 90 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 42.9 kN and C0 52 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.82 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 6.55 kN at 50 mm bore gives a specific load of 0.86 kN per mm; the limiting speed is 1,600 r/min the 32 mm width carries the load at 1.34 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 950 g over a 90x32 mm envelope works out to 0.330 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 50 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads PWTR is the maintenance-free heavy support roller: the twin-row full complement is sealed on both sides with NBR contact lips, eliminating relubrication and excluding contamination typical applications include agricultural equipment cam followers, packaging machine timing cams and glass processing line conveyors this size is commonly specified for agricultural equipment cam followers and packaging machine timing cams, where the 90 mm track diameter and 50 mm bore fit standard cam and rail geometries in glass processing line conveyors the 90 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 950 g mass is low enough for rapid indexing cycles the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
    "applications": [
      "glass processing line conveyors",
      "agricultural equipment cam followers",
      "linear guide and track systems",
      "robotic arm track guidance"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-50.2RS?",
        "a": "PWTR-50.2RS is a sealed double-row full-complement support roller with integral flanges with 90 mm outside diameter, 50 mm bore diameter and 32 mm overall width. The bore is 50 mm and the track contact diameter is 90 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 90x50x32 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-50.2RS?",
        "a": "The published basic dynamic load rating C is 42.9 kN and the basic static load rating C0 is 52 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-50-2RS",
      "PWTR 50.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "PWTR-50110-2RS",
    "brand": "SKF",
    "manufacturer_designation": "PWTR 50110.2RS",
    "series": "PWTR-series",
    "type": "support_roller",
    "d_mm": 50,
    "D_mm": 110,
    "B_mm": 32,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 57.2,
    "static_load_kN": 78,
    "fatigue_load_limit_kN": 9.65,
    "weight_g": 1700,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 110 mm outside diameter runs on the track while the 50 mm bore takes the pin or shaft; the 32 mm overall width spreads the Hertzian contact over the outer ring published ratings C 57.2 kN and C0 78 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.73 is typical for sealed double-row full-complement support roller with integral flanges executions fatigue load limit Pu 9.65 kN at 50 mm bore gives a specific load of 1.14 kN per mm; the limiting speed is 1,600 r/min the 32 mm width carries the load at 1.79 kN per mm of roller complement; section height 30.0 mm between bore and track surface determines the outer-ring bending stiffness mass 1700 g over a 110x32 mm envelope works out to 0.483 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 50 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs PWTR is the maintenance-free heavy support roller: the twin-row full complement is sealed on both sides with NBR contact lips, eliminating relubrication and excluding contamination typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 110 mm track diameter and 50 mm bore fit standard cam and rail geometries in sheet-metal forming press feeds the 110 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 1700 g mass is low enough for rapid indexing cycles the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
    "applications": [
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives",
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "the 2RS seals protect the roller rows but limit relubrication options; the unit is effectively sealed for life",
      "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion",
      "sealed full-complement rollers are the heaviest option — check that the drive can accelerate the mass at the required cam rate",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "pitfalls": [
      "the 2RS seals limit relubrication; the grease fill must last the design life of the cam mechanism",
      "the sealed twin-row construction is the heaviest support roller option — verify the drive torque can accelerate the roller at the required cam profile rate",
      "the sealed outer ring cannot be inspected without destroying the seals; plan replacement on a time or cycle basis rather than condition monitoring"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the PWTR-50110.2RS?",
        "a": "PWTR-50110.2RS is a sealed double-row full-complement support roller with integral flanges with 110 mm outside diameter, 50 mm bore diameter and 32 mm overall width. The bore is 50 mm and the track contact diameter is 110 mm."
      },
      {
        "q": "What does the PWTR designation mean?",
        "a": "The PWTR prefix identifies this as a sealed double-row full-complement support roller with integral flanges. In the SKF catalogue this designation carries the full specification including the 110x50x32 mm envelope and the 1600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of PWTR-50110.2RS?",
        "a": "The published basic dynamic load rating C is 57.2 kN and the basic static load rating C0 is 78 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "PWTR",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "PWTR-50110-2RS",
      "PWTR 50110.2RS"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1600,
    "max_rpm": 1600
  },
  {
    "sku": "STO-10",
    "brand": "SKF",
    "manufacturer_designation": "STO 10",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 10,
    "D_mm": 30,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 8.25,
    "static_load_kN": 8.8,
    "fatigue_load_limit_kN": 1.04,
    "weight_g": 49,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 30 mm outside diameter runs on the track while the 10 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 8.25 kN and C0 8.8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.94 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 1.04 kN at 10 mm bore gives a specific load of 0.82 kN per mm; the limiting speed is 6,000 r/min the 12 mm width carries the load at 0.69 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 49 g over a 30x12 mm envelope works out to 0.136 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 10 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely the STO prefix identifies the open, flangeless support roller design — it relies on the 10 mm pin and the housing shoulders for lateral guidance, and the printed 6000 r/min limiting speed reflects the unshielded roller complement typical applications include glass processing line conveyors, linear guide and track systems and robotic arm track guidance this size is commonly specified for glass processing line conveyors and linear guide and track systems, where the 30 mm track diameter and 10 mm bore fit standard cam and rail geometries in robotic arm track guidance the 30 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 49 g mass is low enough for rapid indexing cycles the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
    "applications": [
      "printing press roller followers",
      "glass processing line conveyors",
      "automotive welding jig positioners",
      "conveyor transfer and diverting rollers"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-10?",
        "a": "STO-10 is a support roller without flange rings, with inner ring with 30 mm outside diameter, 10 mm bore diameter and 12 mm overall width. The bore is 10 mm and the track contact diameter is 30 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 30x10x12 mm envelope and the 6000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-10?",
        "a": "The published basic dynamic load rating C is 8.25 kN and the basic static load rating C0 is 8.8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-10",
      "STO 10"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 6000,
    "max_rpm": 6000
  },
  {
    "sku": "STO-12",
    "brand": "SKF",
    "manufacturer_designation": "STO 12",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 12,
    "D_mm": 32,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 8.8,
    "static_load_kN": 9.8,
    "fatigue_load_limit_kN": 1.18,
    "weight_g": 57,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 8.8 kN and C0 9.8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.90 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 1.18 kN at 12 mm bore gives a specific load of 0.73 kN per mm; the limiting speed is 5,600 r/min the 12 mm width carries the load at 0.73 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 57 g over a 32x12 mm envelope works out to 0.148 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 12 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages STO is the entry-level support roller execution: no integral flanges or seals, so the designer must provide axial location and contamination protection in the surrounding structure typical applications include printing press roller followers, automotive welding jig positioners and conveyor transfer and diverting rollers this size is commonly specified for printing press roller followers and automotive welding jig positioners, where the 32 mm track diameter and 12 mm bore fit standard cam and rail geometries in conveyor transfer and diverting rollers the 32 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 57 g mass is low enough for rapid indexing cycles the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
    "applications": [
      "glass processing line conveyors",
      "printing press roller followers",
      "linear guide and track systems",
      "robotic arm track guidance"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-12?",
        "a": "STO-12 is a support roller without flange rings, with inner ring with 32 mm outside diameter, 12 mm bore diameter and 12 mm overall width. The bore is 12 mm and the track contact diameter is 32 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 32x12x12 mm envelope and the 5600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-12?",
        "a": "The published basic dynamic load rating C is 8.8 kN and the basic static load rating C0 is 9.8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-12",
      "STO 12"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5600,
    "max_rpm": 5600
  },
  {
    "sku": "STO-15",
    "brand": "SKF",
    "manufacturer_designation": "STO 15",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 15,
    "D_mm": 35,
    "B_mm": 12,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 9.13,
    "static_load_kN": 10.6,
    "fatigue_load_limit_kN": 1.27,
    "weight_g": 63,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 35 mm outside diameter runs on the track while the 15 mm bore takes the pin or shaft; the 12 mm overall width spreads the Hertzian contact over the outer ring published ratings C 9.13 kN and C0 10.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.86 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 1.27 kN at 15 mm bore gives a specific load of 0.61 kN per mm; the limiting speed is 5,000 r/min the 12 mm width carries the load at 0.76 kN per mm of roller complement; section height 10.0 mm between bore and track surface determines the outer-ring bending stiffness mass 63 g over a 35x12 mm envelope works out to 0.150 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 15 mm bore puts this in the small-to-medium transition where the roller complement is still needle-type but the outer ring is thick enough for moderate shock loads the STO designation means the simplest yoke-type track roller — needle rollers between an inner ring and the thick-walled outer ring, with no added features beyond the basic load-carrying function typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 35 mm track diameter and 15 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 35 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 63 g mass is low enough for rapid indexing cycles mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
    "applications": [
      "automotive welding jig positioners",
      "linear guide and track systems",
      "conveyor transfer and diverting rollers",
      "woodworking machinery feed rollers"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-15?",
        "a": "STO-15 is a support roller without flange rings, with inner ring with 35 mm outside diameter, 15 mm bore diameter and 12 mm overall width. The bore is 15 mm and the track contact diameter is 35 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 35x15x12 mm envelope and the 5000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-15?",
        "a": "The published basic dynamic load rating C is 9.13 kN and the basic static load rating C0 is 10.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-15",
      "STO 15"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 5000,
    "max_rpm": 5000
  },
  {
    "sku": "STO-17",
    "brand": "SKF",
    "manufacturer_designation": "STO 17",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 17,
    "D_mm": 40,
    "B_mm": 16,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 14.2,
    "static_load_kN": 17.6,
    "fatigue_load_limit_kN": 2.08,
    "weight_g": 110,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 40 mm outside diameter runs on the track while the 17 mm bore takes the pin or shaft; the 16 mm overall width spreads the Hertzian contact over the outer ring published ratings C 14.2 kN and C0 17.6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 2.08 kN at 17 mm bore gives a specific load of 0.84 kN per mm; the limiting speed is 4,500 r/min the 16 mm width carries the load at 0.89 kN per mm of roller complement; section height 11.5 mm between bore and track surface determines the outer-ring bending stiffness mass 110 g over a 40x16 mm envelope works out to 0.172 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 17 mm bore this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the STO prefix identifies the open, flangeless support roller design — it relies on the 17 mm pin and the housing shoulders for lateral guidance, and the printed 4500 r/min limiting speed reflects the unshielded roller complement typical applications include automotive welding jig positioners, conveyor transfer and diverting rollers and woodworking machinery feed rollers this size is commonly specified for automotive welding jig positioners and conveyor transfer and diverting rollers, where the 40 mm track diameter and 17 mm bore fit standard cam and rail geometries in woodworking machinery feed rollers the 40 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 110 g mass is low enough for rapid indexing cycles without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting",
    "applications": [
      "linear guide and track systems",
      "automotive welding jig positioners",
      "robotic arm track guidance",
      "paper mill web guide rollers"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-17?",
        "a": "STO-17 is a support roller without flange rings, with inner ring with 40 mm outside diameter, 17 mm bore diameter and 16 mm overall width. The bore is 17 mm and the track contact diameter is 40 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 40x17x16 mm envelope and the 4500 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-17?",
        "a": "The published basic dynamic load rating C is 14.2 kN and the basic static load rating C0 is 17.6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-17",
      "STO 17"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4500,
    "max_rpm": 4500
  },
  {
    "sku": "STO-20",
    "brand": "SKF",
    "manufacturer_designation": "STO 20",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 20,
    "D_mm": 47,
    "B_mm": 16,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.1,
    "static_load_kN": 21.2,
    "fatigue_load_limit_kN": 2.5,
    "weight_g": 150,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm bore takes the pin or shaft; the 16 mm overall width spreads the Hertzian contact over the outer ring published ratings C 16.1 kN and C0 21.2 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.76 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 2.5 kN at 20 mm bore gives a specific load of 0.81 kN per mm; the limiting speed is 4,000 r/min the 16 mm width carries the load at 1.01 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 150 g over a 47x16 mm envelope works out to 0.199 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers reading STO: a single-row needle roller support roller with inner ring and no flanges; the 47 mm OD is the track contact surface and the narrow 16 mm width suits tight cam tracks typical applications include linear guide and track systems, robotic arm track guidance and paper mill web guide rollers this size is commonly specified for linear guide and track systems and robotic arm track guidance, where the 47 mm track diameter and 20 mm bore fit standard cam and rail geometries in paper mill web guide rollers the 47 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 150 g mass is low enough for rapid indexing cycles without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting",
    "applications": [
      "paper mill web guide rollers",
      "linear guide and track systems",
      "automatic assembly machine linkages",
      "food processing line track rollers"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-20?",
        "a": "STO-20 is a support roller without flange rings, with inner ring with 47 mm outside diameter, 20 mm bore diameter and 16 mm overall width. The bore is 20 mm and the track contact diameter is 47 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 47x20x16 mm envelope and the 4000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-20?",
        "a": "The published basic dynamic load rating C is 16.1 kN and the basic static load rating C0 is 21.2 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-20",
      "STO 20"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 4000,
    "max_rpm": 4000
  },
  {
    "sku": "STO-25",
    "brand": "SKF",
    "manufacturer_designation": "STO 25",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 25,
    "D_mm": 52,
    "B_mm": 16,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 16.5,
    "static_load_kN": 22.8,
    "fatigue_load_limit_kN": 2.7,
    "weight_g": 180,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 52 mm outside diameter runs on the track while the 25 mm bore takes the pin or shaft; the 16 mm overall width spreads the Hertzian contact over the outer ring published ratings C 16.5 kN and C0 22.8 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.72 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 2.7 kN at 25 mm bore gives a specific load of 0.66 kN per mm; the limiting speed is 3,400 r/min the 16 mm width carries the load at 1.03 kN per mm of roller complement; section height 13.5 mm between bore and track surface determines the outer-ring bending stiffness mass 180 g over a 52x16 mm envelope works out to 0.216 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 25 mm bore falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the STO designation means the simplest yoke-type track roller — needle rollers between an inner ring and the thick-walled outer ring, with no added features beyond the basic load-carrying function typical applications include glass processing line conveyors, linear guide and track systems and robotic arm track guidance this size is commonly specified for glass processing line conveyors and linear guide and track systems, where the 52 mm track diameter and 25 mm bore fit standard cam and rail geometries in robotic arm track guidance the 52 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 180 g mass is low enough for rapid indexing cycles the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
    "applications": [
      "cam mechanisms and indexing drives",
      "glass processing line conveyors",
      "material handling lift and lower tracks",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-25?",
        "a": "STO-25 is a support roller without flange rings, with inner ring with 52 mm outside diameter, 25 mm bore diameter and 16 mm overall width. The bore is 25 mm and the track contact diameter is 52 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 52x25x16 mm envelope and the 3400 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-25?",
        "a": "The published basic dynamic load rating C is 16.5 kN and the basic static load rating C0 is 22.8 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-25",
      "STO 25"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 3400,
    "max_rpm": 3400
  },
  {
    "sku": "STO-30",
    "brand": "SKF",
    "manufacturer_designation": "STO 30",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 30,
    "D_mm": 62,
    "B_mm": 20,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 22.9,
    "static_load_kN": 34.5,
    "fatigue_load_limit_kN": 4.25,
    "weight_g": 310,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 62 mm outside diameter runs on the track while the 30 mm bore takes the pin or shaft; the 20 mm overall width spreads the Hertzian contact over the outer ring published ratings C 22.9 kN and C0 34.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.66 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 4.25 kN at 30 mm bore gives a specific load of 0.76 kN per mm; the limiting speed is 2,600 r/min the 20 mm width carries the load at 1.15 kN per mm of roller complement; section height 16.0 mm between bore and track surface determines the outer-ring bending stiffness mass 310 g over a 62x20 mm envelope works out to 0.250 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 30 mm bore places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the STO prefix identifies the open, flangeless support roller design — it relies on the 30 mm pin and the housing shoulders for lateral guidance, and the printed 2600 r/min limiting speed reflects the unshielded roller complement typical applications include robotic arm track guidance, paper mill web guide rollers and automatic assembly machine linkages this size is commonly specified for robotic arm track guidance and paper mill web guide rollers, where the 62 mm track diameter and 30 mm bore fit standard cam and rail geometries in automatic assembly machine linkages the 62 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 310 g mass is low enough for rapid indexing cycles the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
    "applications": [
      "automatic assembly machine linkages",
      "robotic arm track guidance",
      "food processing line track rollers",
      "printing press roller followers"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-30?",
        "a": "STO-30 is a support roller without flange rings, with inner ring with 62 mm outside diameter, 30 mm bore diameter and 20 mm overall width. The bore is 30 mm and the track contact diameter is 62 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 62x30x20 mm envelope and the 2600 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-30?",
        "a": "The published basic dynamic load rating C is 22.9 kN and the basic static load rating C0 is 34.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-30",
      "STO 30"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2600,
    "max_rpm": 2600
  },
  {
    "sku": "STO-35",
    "brand": "SKF",
    "manufacturer_designation": "STO 35",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 35,
    "D_mm": 72,
    "B_mm": 20,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 24.6,
    "static_load_kN": 39,
    "fatigue_load_limit_kN": 4.8,
    "weight_g": 440,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 72 mm outside diameter runs on the track while the 35 mm bore takes the pin or shaft; the 20 mm overall width spreads the Hertzian contact over the outer ring published ratings C 24.6 kN and C0 39 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.63 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 4.8 kN at 35 mm bore gives a specific load of 0.70 kN per mm; the limiting speed is 2,200 r/min the 20 mm width carries the load at 1.23 kN per mm of roller complement; section height 18.5 mm between bore and track surface determines the outer-ring bending stiffness mass 440 g over a 72x20 mm envelope works out to 0.306 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 35 mm bore this size crosses into the range where double-row full-complement executions (NUTR/PWTR/NUKR) offer substantially higher C ratings than the single-row needle designs the STO prefix identifies the open, flangeless support roller design — it relies on the 35 mm pin and the housing shoulders for lateral guidance, and the printed 2200 r/min limiting speed reflects the unshielded roller complement typical applications include material handling lift and lower tracks, sheet-metal forming press feeds and textile machine cam drives this size is commonly specified for material handling lift and lower tracks and sheet-metal forming press feeds, where the 72 mm track diameter and 35 mm bore fit standard cam and rail geometries in textile machine cam drives the 72 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 440 g mass is low enough for rapid indexing cycles without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
    "applications": [
      "textile machine cam drives",
      "material handling lift and lower tracks",
      "agricultural equipment cam followers",
      "packaging machine timing cams"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-35?",
        "a": "STO-35 is a support roller without flange rings, with inner ring with 72 mm outside diameter, 35 mm bore diameter and 20 mm overall width. The bore is 35 mm and the track contact diameter is 72 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 72x35x20 mm envelope and the 2200 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-35?",
        "a": "The published basic dynamic load rating C is 24.6 kN and the basic static load rating C0 is 39 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-35",
      "STO 35"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 2200,
    "max_rpm": 2200
  },
  {
    "sku": "STO-40",
    "brand": "SKF",
    "manufacturer_designation": "STO 40",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 40,
    "D_mm": 80,
    "B_mm": 20,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 23.8,
    "static_load_kN": 39,
    "fatigue_load_limit_kN": 4.75,
    "weight_g": 530,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 80 mm outside diameter runs on the track while the 40 mm bore takes the pin or shaft; the 20 mm overall width spreads the Hertzian contact over the outer ring published ratings C 23.8 kN and C0 39 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.61 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 4.75 kN at 40 mm bore gives a specific load of 0.59 kN per mm; the limiting speed is 1,900 r/min the 20 mm width carries the load at 1.19 kN per mm of roller complement; section height 20.0 mm between bore and track surface determines the outer-ring bending stiffness mass 530 g over a 80x20 mm envelope works out to 0.331 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 40 mm bore this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the STO designation means the simplest yoke-type track roller — needle rollers between an inner ring and the thick-walled outer ring, with no added features beyond the basic load-carrying function typical applications include material handling lift and lower tracks, sheet-metal forming press feeds and textile machine cam drives this size is commonly specified for material handling lift and lower tracks and sheet-metal forming press feeds, where the 80 mm track diameter and 40 mm bore fit standard cam and rail geometries in textile machine cam drives the 80 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 530 g mass is low enough for rapid indexing cycles mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
    "applications": [
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks",
      "cam mechanisms and indexing drives",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-40?",
        "a": "STO-40 is a support roller without flange rings, with inner ring with 80 mm outside diameter, 40 mm bore diameter and 20 mm overall width. The bore is 40 mm and the track contact diameter is 80 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 80x40x20 mm envelope and the 1900 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-40?",
        "a": "The published basic dynamic load rating C is 23.8 kN and the basic static load rating C0 is 39 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-40",
      "STO 40"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 1900,
    "max_rpm": 1900
  },
  {
    "sku": "STO-6-TN",
    "brand": "SKF",
    "manufacturer_designation": "STO 6 TN",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 6,
    "D_mm": 19,
    "B_mm": 10,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 3.74,
    "static_load_kN": 4.5,
    "fatigue_load_limit_kN": 0.5,
    "weight_g": 17,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 19 mm outside diameter runs on the track while the 6 mm bore takes the pin or shaft; the 10 mm overall width spreads the Hertzian contact over the outer ring published ratings C 3.74 kN and C0 4.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.83 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 0.5 kN at 6 mm bore gives a specific load of 0.62 kN per mm; the limiting speed is 7,000 r/min the 10 mm width carries the load at 0.37 kN per mm of roller complement; section height 6.5 mm between bore and track surface determines the outer-ring bending stiffness mass 17 g over a 19x10 mm envelope works out to 0.089 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 6 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely reading STO: a single-row needle roller support roller with inner ring and no flanges; the 19 mm OD is the track contact surface and the narrow 10 mm width suits tight cam tracks typical applications include cam mechanisms and indexing drives, material handling lift and lower tracks and sheet-metal forming press feeds this size is commonly specified for cam mechanisms and indexing drives and material handling lift and lower tracks, where the 19 mm track diameter and 6 mm bore fit standard cam and rail geometries in sheet-metal forming press feeds the 19 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 17 g mass is low enough for rapid indexing cycles the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
    "applications": [
      "conveyor transfer and diverting rollers",
      "cam mechanisms and indexing drives",
      "woodworking machinery feed rollers",
      "material handling lift and lower tracks"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-6-TN?",
        "a": "STO-6-TN is a support roller without flange rings, with inner ring with 19 mm outside diameter, 6 mm bore diameter and 10 mm overall width. The bore is 6 mm and the track contact diameter is 19 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 19x6x10 mm envelope and the 7000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-6-TN?",
        "a": "The published basic dynamic load rating C is 3.74 kN and the basic static load rating C0 is 4.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-6-TN",
      "STO 6 TN"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 7000,
    "max_rpm": 7000
  },
  {
    "sku": "STO-8-TN",
    "brand": "SKF",
    "manufacturer_designation": "STO 8 TN",
    "series": "STO-series",
    "type": "support_roller",
    "d_mm": 8,
    "D_mm": 24,
    "B_mm": 10,
    "material": "GCr15",
    "seal_type": "open",
    "clearance": "CN",
    "tolerance_class": "P0",
    "cage_type": "steel",
    "dynamic_load_kN": 4.13,
    "static_load_kN": 5.4,
    "fatigue_load_limit_kN": 0.6,
    "weight_g": 26,
    "weight_estimated": false,
    "temp_min_c": -40,
    "temp_max_c": 120,
    "standard": "ISO 15",
    "naming_rule_text": "the 24 mm outside diameter runs on the track while the 8 mm bore takes the pin or shaft; the 10 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.13 kN and C0 5.4 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.76 is typical for support roller without flange rings, with inner ring executions fatigue load limit Pu 0.6 kN at 8 mm bore gives a specific load of 0.52 kN per mm; the limiting speed is 7,000 r/min the 10 mm width carries the load at 0.41 kN per mm of roller complement; section height 8.0 mm between bore and track surface determines the outer-ring bending stiffness mass 26 g over a 24x10 mm envelope works out to 0.108 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 8 mm bore this is one of the smallest sizes listed; the reduced section height limits the outer-ring bending stiffness, so track alignment must be held closely STO denotes the basic support roller: a needle roller and cage assembly running directly on the track, with an inner ring but no flange rings; axial guidance must come from the adjacent machine structure typical applications include conveyor transfer and diverting rollers, woodworking machinery feed rollers and cam mechanisms and indexing drives this size is commonly specified for conveyor transfer and diverting rollers and woodworking machinery feed rollers, where the 24 mm track diameter and 8 mm bore fit standard cam and rail geometries in cam mechanisms and indexing drives the 24 mm outer ring provides the rolling contact while the inner ring bore simplifies mounting; the 26 g mass is low enough for rapid indexing cycles the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
    "applications": [
      "cam mechanisms and indexing drives",
      "conveyor transfer and diverting rollers",
      "material handling lift and lower tracks",
      "sheet-metal forming press feeds"
    ],
    "failure_modes": [
      "without flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure",
      "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring",
      "the needle roller complement is sensitive to misalignment; a bent shaft or angled track creates uneven load distribution and early raceway pitting"
    ],
    "pitfalls": [
      "mounting on a worn or undersized pin reduces the effective clearance and can preload the roller hot",
      "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway",
      "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure"
    ],
    "faq": [
      {
        "q": "What are the dimensions of the STO-8-TN?",
        "a": "STO-8-TN is a support roller without flange rings, with inner ring with 24 mm outside diameter, 8 mm bore diameter and 10 mm overall width. The bore is 8 mm and the track contact diameter is 24 mm."
      },
      {
        "q": "What does the STO designation mean?",
        "a": "The STO prefix identifies this as a support roller without flange rings, with inner ring. In the SKF catalogue this designation carries the full specification including the 24x8x10 mm envelope and the 7000 r/min limiting speed."
      },
      {
        "q": "What is the load capacity of STO-8-TN?",
        "a": "The published basic dynamic load rating C is 4.13 kN and the basic static load rating C0 is 5.4 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track."
      }
    ],
    "cross_ref": [
      {
        "equiv_sku": "STO",
        "equiv_brand": "ISO 15",
        "level": "full",
        "note": "ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier."
      }
    ],
    "source_ref": "https://cdn.skfmediahub.skf.com/api/public/0901d196802809de/pdf_preview_medium/0901d196802809de_pdf_preview_medium.pdf",
    "catalog_ver": "SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 15 support rollers / ch. 16 cam followers",
    "extracted_at": "2026-09-30",
    "last_verified": "2026-09-30",
    "confidence_score": 0.7,
    "status": "published",
    "aliases": [
      "STO-8-TN",
      "STO 8 TN"
    ],
    "locale_variants": {},
    "limiting_speed_rpm": 7000,
    "max_rpm": 7000
  }
]