[ { "sku": "KR16", "brand": "FAG", "manufacturer_designation": "KR16", "series": "kr-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 19, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 6×16×28 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm stud — and the 28 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.15 kN and C0 3.4 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.93 reflects a rolling-element pack sized for heavy static track loading, and the 5.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.46 kN at 6 mm stud, equivalent to 0.53 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 6 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 28 mm overall stud length mass is 19 g, or 0.04 g per mm² of the 16×28 mm track envelope — inertia that the drive must accelerate on every index of the cam the 6 mm stud shank sits in the miniature band; at 28 mm wide the KR16 is built into compact cam drives, indexing pawls and light linkages C 3.15 kN, C0 3.4 kN and Cur 0.46 kN are the cam-contact ratings; the limiting speed is 14,000 r/min with no reference speed published The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 16 mm track diameter and 3.15 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 19 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 28 mm stud length and the published 3.4 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": [ "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": [ "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 KR16?", "a": "The KR16 is a KR stud-type cam follower with needle roller and cage assembly with 16 mm outside diameter, 6 mm stud diameter and 28 mm overall length, envelope 6×16×28 mm. Mass is 19 g." }, { "q": "What does the KR16 designation mean in the FAG/INA HR1 catalogue?", "a": "KR16 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×16×28 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 KR16?", "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 KR16?", "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": "How is a stud-type roller like the KR16 fitted and adjusted?", "a": "The 6 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 16 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR16-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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR16", "KR16" ], "locale_variants": {} }, { "sku": "KR16-PP", "brand": "FAG", "manufacturer_designation": "KR16-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 18, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 6×16×28 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm stud — and the 28 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.15 kN and C0 3.4 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.93 reflects a rolling-element pack sized for heavy static track loading, and the 5.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.46 kN at 6 mm stud, equivalent to 0.53 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 6 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 28 mm overall stud length mass is 18 g, or 0.04 g per mm² of the 16×28 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm stud shank and only 18 g: the smallest sizes demand accurate shaft geometry, because the 5.0 mm section leaves no tolerance for a soft or tapered seat C 3.15 kN, C0 3.4 kN and Cur 0.46 kN are the cam-contact ratings; the limiting speed is 14,000 r/min with no reference speed published Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 28 mm overall stud length The PP seals make this a maintenance-free unit: the 3.15 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 16 mm track diameter and 3.15 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 18 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 28 mm stud length and the published 3.4 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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": [ "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 KR16-PP?", "a": "The KR16-PP is a KR stud-type cam follower with needle roller and cage assembly with 16 mm outside diameter, 6 mm stud diameter and 28 mm overall length, envelope 6×16×28 mm. Mass is 18 g." }, { "q": "What does the KR16-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR16-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×16×28 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 KR16-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 KR16-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": "How is a stud-type roller like the KR16-PP fitted and adjusted?", "a": "The 6 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 16 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR16", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR16-PP", "KR16-PP" ], "locale_variants": {} }, { "sku": "KRE16-PP", "brand": "FAG", "manufacturer_designation": "KRE16-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 20, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 6×16×28 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm stud — and the 28 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.15 kN and C0 3.4 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.93 reflects a rolling-element pack sized for heavy static track loading, and the 5.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.46 kN at 6 mm stud, equivalent to 0.53 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 6 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 28 mm overall stud length mass is 20 g, or 0.04 g per mm² of the 16×28 mm track envelope — inertia that the drive must accelerate on every index of the cam at 6 mm stud shank this is one of the smallest HR1 executions — chosen where a 16 mm envelope must carry line-contact loads that no miniature ball bearing could take C 3.15 kN, C0 3.4 kN and Cur 0.46 kN are the cam-contact ratings; the limiting speed is 14,000 r/min with no reference speed published The caged pack keeps friction and inertia low — at 20 g this is the follower for fast indexing drives and high-cycle linkages 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 agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 16 mm track diameter and 3.15 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 20 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 28 mm stud length and the published 3.4 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. 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 stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.", "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 KRE16-PP?", "a": "The KRE16-PP is a KRE stud-type cam follower with eccentric locking collar with 16 mm outside diameter, 6 mm stud diameter and 28 mm overall length, envelope 6×16×28 mm. Mass is 20 g." }, { "q": "What does the KRE16-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE16-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×16×28 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 KRE16-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 KRE16-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": "How is a stud-type roller like the KRE16-PP fitted and adjusted?", "a": "The 6 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 16 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRE16", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE16-PP", "KRE16-PP" ], "locale_variants": {} }, { "sku": "KR16-SK-PP", "brand": "FAG", "manufacturer_designation": "KR16-SK-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 19, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 6×16×28 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm stud — and the 28 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.15 kN and C0 3.4 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.93 reflects a rolling-element pack sized for heavy static track loading, and the 5.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.46 kN at 6 mm stud, equivalent to 0.53 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 6 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 28 mm overall stud length mass is 19 g, or 0.04 g per mm² of the 16×28 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm stud shank and only 19 g: the smallest sizes demand accurate shaft geometry, because the 5.0 mm section leaves no tolerance for a soft or tapered seat Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 28 mm overall stud length; the SK variant carries a hexagon socket in the stud for a key drive The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 3.4 kN static rating and skews the outer ring The PP seals make this a maintenance-free unit: the 3.15 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. -SK is a mounting-aid suffix only; the 3.15 kN rating and PP sealing are unchanged from the standard KR execution. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 16 mm track diameter and 3.15 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 19 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 28 mm stud length and the published 3.4 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": [ "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": [ "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 28 mm stud unusable." ], "faq": [ { "q": "What are the dimensions of the KR16-SK-PP?", "a": "The KR16-SK-PP is a KR stud-type cam follower with needle roller and cage assembly with 16 mm outside diameter, 6 mm stud diameter and 28 mm overall length, envelope 6×16×28 mm. Mass is 19 g." }, { "q": "What does the KR16-SK-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR16-SK-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×16×28 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 KR16-SK-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 KR16-SK-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": "How is a stud-type roller like the KR16-SK-PP fitted and adjusted?", "a": "The 6 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 16 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR16", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR16-SK-PP", "KR16-SK-PP" ], "locale_variants": {} }, { "sku": "KRV16-PP", "brand": "FAG", "manufacturer_designation": "KRV16-PP", "series": "krv-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 19, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 6×16×28 mm: the 16 mm outside diameter is the track-running surface — a thick-walled outer ring over a 6 mm stud — and the 28 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 4.9 kN and C0 6.7 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.73 reflects a rolling-element pack sized for heavy static track loading, and the 5.0 mm radial section gives the outer ring its bending stiffness fatigue load limit Cur is 0.97 kN at 6 mm stud, equivalent to 0.82 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 6 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.18 kN per millimetre of rolling-element complement within the 28 mm overall stud length mass is 19 g, or 0.04 g per mm² of the 16×28 mm track envelope — inertia that the drive must accelerate on every index of the cam 6 mm stud shank and only 19 g: the smallest sizes demand accurate shaft geometry, because the 5.0 mm section leaves no tolerance for a soft or tapered seat C 4.9 kN, C0 6.7 kN and Cur 0.97 kN are the cam-contact ratings; the limiting speed is 3,800 r/min with no reference speed published The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 6.7 kN static rating and skews the outer ring 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 3,800 r/min limiting speed. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 16 mm track diameter and 4.9 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 19 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 28 mm stud length and the published 6.7 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. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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": [ "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.", "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 28 mm stud unusable." ], "faq": [ { "q": "What are the dimensions of the KRV16-PP?", "a": "The KRV16-PP is a KRV full-complement stud-type cam follower with 16 mm outside diameter, 6 mm stud diameter and 28 mm overall length, envelope 6×16×28 mm. Mass is 19 g." }, { "q": "What does the KRV16-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV16-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 6×16×28 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 KRV16-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 KRV16-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": "How is a stud-type roller like the KRV16-PP fitted and adjusted?", "a": "The 6 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 16 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRV16", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV16-PP", "KRV16-PP" ], "locale_variants": {} }, { "sku": "KR19", "brand": "FAG", "manufacturer_designation": "KR19", "series": "kr-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 29, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 8×19×32 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm stud — and the 32 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.5 kN and C0 4.05 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.86 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 0.55 kN at 8 mm stud, equivalent to 0.44 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 8 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 32 mm overall stud length mass is 29 g, or 0.05 g per mm² of the 19×32 mm track envelope — inertia that the drive must accelerate on every index of the cam the 8 mm stud shank sits in the miniature band; at 32 mm wide the KR19 is built into compact cam drives, indexing pawls and light linkages KR is the stud-type cam follower with a needle roller and cage assembly: the 8 mm threaded stud bolts into the bracket and the 19 mm crowned outer ring follows the cam The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 19 mm track diameter and 3.5 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 29 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 32 mm stud length and the published 4.05 kN static rating. 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.", "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.", "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.", "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 KR19?", "a": "The KR19 is a KR stud-type cam follower with needle roller and cage assembly with 19 mm outside diameter, 8 mm stud diameter and 32 mm overall length, envelope 8×19×32 mm. Mass is 29 g." }, { "q": "What does the KR19 designation mean in the FAG/INA HR1 catalogue?", "a": "KR19 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×19×32 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 KR19?", "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 KR19?", "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": "How is a stud-type roller like the KR19 fitted and adjusted?", "a": "The 8 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 19 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR19-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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR19", "KR19" ], "locale_variants": {} }, { "sku": "KR19-PP", "brand": "FAG", "manufacturer_designation": "KR19-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 29, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 8×19×32 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm stud — and the 32 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.5 kN and C0 4.05 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.86 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 0.55 kN at 8 mm stud, equivalent to 0.44 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 8 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 32 mm overall stud length mass is 29 g, or 0.05 g per mm² of the 19×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 8 mm stud shank and only 29 g: the smallest sizes demand accurate shaft geometry, because the 5.5 mm section leaves no tolerance for a soft or tapered seat KR is the stud-type cam follower with a needle roller and cage assembly: the 8 mm threaded stud bolts into the bracket and the 19 mm crowned outer ring follows the cam The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 4.05 kN static rating and skews the outer ring -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 32 mm width. 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 3.5 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 29 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 32 mm stud length and the published 4.05 kN static rating. 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.", "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.", "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 32 mm stud unusable." ], "faq": [ { "q": "What are the dimensions of the KR19-PP?", "a": "The KR19-PP is a KR stud-type cam follower with needle roller and cage assembly with 19 mm outside diameter, 8 mm stud diameter and 32 mm overall length, envelope 8×19×32 mm. Mass is 29 g." }, { "q": "What does the KR19-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR19-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×19×32 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 KR19-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 KR19-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": "How is a stud-type roller like the KR19-PP fitted and adjusted?", "a": "The 8 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 19 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR19", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR19-PP", "KR19-PP" ], "locale_variants": {} }, { "sku": "KRE19-PP", "brand": "FAG", "manufacturer_designation": "KRE19-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 32, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 8×19×32 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm stud — and the 32 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.5 kN and C0 4.05 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.86 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 0.55 kN at 8 mm stud, equivalent to 0.44 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 8 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 32 mm overall stud length mass is 32 g, or 0.05 g per mm² of the 19×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 8 mm stud shank and only 32 g: the smallest sizes demand accurate shaft geometry, because the 5.5 mm section leaves no tolerance for a soft or tapered seat C 3.5 kN, C0 4.05 kN and Cur 0.55 kN are the cam-contact ratings; the limiting speed is 11,000 r/min with no reference speed published Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 32 mm overall stud length 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 11,000 r/min limiting speed. 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 3.5 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 32 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 32 mm stud length and the published 4.05 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. 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": [ "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 KRE19-PP?", "a": "The KRE19-PP is a KRE stud-type cam follower with eccentric locking collar with 19 mm outside diameter, 8 mm stud diameter and 32 mm overall length, envelope 8×19×32 mm. Mass is 32 g." }, { "q": "What does the KRE19-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE19-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×19×32 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 KRE19-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 KRE19-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": "How is a stud-type roller like the KRE19-PP fitted and adjusted?", "a": "The 8 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 19 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRE19", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE19-PP", "KRE19-PP" ], "locale_variants": {} }, { "sku": "KR19-SK-PP", "brand": "FAG", "manufacturer_designation": "KR19-SK-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 29, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 8×19×32 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm stud — and the 32 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 3.5 kN and C0 4.05 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.86 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 0.55 kN at 8 mm stud, equivalent to 0.44 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 8 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.11 kN per millimetre of rolling-element complement within the 32 mm overall stud length mass is 29 g, or 0.05 g per mm² of the 19×32 mm track envelope — inertia that the drive must accelerate on every index of the cam at 8 mm stud shank this is one of the smallest HR1 executions — chosen where a 19 mm envelope must carry line-contact loads that no miniature ball bearing could take Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 32 mm overall stud length; the SK variant carries a hexagon socket in the stud for a key drive The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload 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. The SK socket prevents the stud from turning as the mounting nut is torqued, protecting the threaded 32 mm-long shank and the bracket faces. 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 threaded stud bolts directly to the frame, and in printing press sheet-transfer grippers the 29 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 32 mm stud length and the published 4.05 kN static rating. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.", "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 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." ], "faq": [ { "q": "What are the dimensions of the KR19-SK-PP?", "a": "The KR19-SK-PP is a KR stud-type cam follower with needle roller and cage assembly with 19 mm outside diameter, 8 mm stud diameter and 32 mm overall length, envelope 8×19×32 mm. Mass is 29 g." }, { "q": "What does the KR19-SK-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR19-SK-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×19×32 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 KR19-SK-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 KR19-SK-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": "How is a stud-type roller like the KR19-SK-PP fitted and adjusted?", "a": "The 8 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 19 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR19", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR19-SK-PP", "KR19-SK-PP" ], "locale_variants": {} }, { "sku": "KRV19-PP", "brand": "FAG", "manufacturer_designation": "KRV19-PP", "series": "krv-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 31, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 8×19×32 mm: the 19 mm outside diameter is the track-running surface — a thick-walled outer ring over a 8 mm stud — and the 32 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 5.4 kN and C0 8.1 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.67 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 1.19 kN at 8 mm stud, equivalent to 0.68 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 8 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.17 kN per millimetre of rolling-element complement within the 32 mm overall stud length mass is 31 g, or 0.05 g per mm² of the 19×32 mm track envelope — inertia that the drive must accelerate on every index of the cam 8 mm stud shank and only 31 g: the smallest sizes demand accurate shaft geometry, because the 5.5 mm section leaves no tolerance for a soft or tapered seat Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 32 mm overall stud length The full complement raises static capacity but lowers the speed ceiling and generates more friction torque — slow, heavily loaded cams are its duty -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 conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 19 mm track diameter and 5.4 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 31 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 32 mm stud length and the published 8.1 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 32 mm stud unusable. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.", "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 32 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 KRV19-PP?", "a": "The KRV19-PP is a KRV full-complement stud-type cam follower with 19 mm outside diameter, 8 mm stud diameter and 32 mm overall length, envelope 8×19×32 mm. Mass is 31 g." }, { "q": "What does the KRV19-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV19-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 8×19×32 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 KRV19-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 KRV19-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": "How is a stud-type roller like the KRV19-PP fitted and adjusted?", "a": "The 8 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 19 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRV19", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV19-PP", "KRV19-PP" ], "locale_variants": {} }, { "sku": "KR22", "brand": "FAG", "manufacturer_designation": "KR22", "series": "kr-series", "type": "cam_follower", "d_mm": 10, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.55, "static_load_kN": 5.4, "fatigue_load_limit_kN": 0.74, "limiting_speed_rpm": 8000, "max_rpm": 8000, "weight_g": 45, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×22×36 mm: the 22 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 4.55 kN and C0 5.4 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.84 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 0.74 kN at 10 mm stud, equivalent to 0.45 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.13 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 45 g, or 0.06 g per mm² of the 22×36 mm track envelope — inertia that the drive must accelerate on every index of the cam the 10 mm stud shank sits in the miniature band; at 36 mm wide the KR22 is built into compact cam drives, indexing pawls and light linkages KR is the stud-type cam follower with a needle roller and cage assembly: the 10 mm threaded stud bolts into the bracket and the 22 mm crowned outer ring follows the cam C 4.55 kN, C0 5.4 kN and Cur 0.74 kN are the cam-contact ratings; the limiting speed is 8,000 r/min with no reference speed published Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 22 mm track diameter and 4.55 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 45 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 36 mm stud length and the published 5.4 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 36 mm stud unusable. 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": [ "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": [ "Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 36 mm stud unusable.", "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.", "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 KR22?", "a": "The KR22 is a KR stud-type cam follower with needle roller and cage assembly with 22 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×22×36 mm. Mass is 45 g." }, { "q": "What does the KR22 designation mean in the FAG/INA HR1 catalogue?", "a": "KR22 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×22×36 mm and the catalogue ratings are C 4.55 kN, C0 5.4 kN, Cur 0.74 kN." }, { "q": "What is the load capacity of the KR22?", "a": "The basic dynamic load rating C is 4.55 kN and the basic static load rating C0 is 5.4 kN; the fatigue load limit Cur is 0.74 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 KR22?", "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": "How is a stud-type roller like the KR22 fitted and adjusted?", "a": "The 10 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 22 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR22-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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR22", "KR22" ], "locale_variants": {} }, { "sku": "KR22-PP", "brand": "FAG", "manufacturer_designation": "KR22-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 10, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.55, "static_load_kN": 5.4, "fatigue_load_limit_kN": 0.74, "limiting_speed_rpm": 8000, "max_rpm": 8000, "weight_g": 43, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×22×36 mm: the 22 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 4.55 kN and C0 5.4 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.84 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 0.74 kN at 10 mm stud, equivalent to 0.45 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.13 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 43 g, or 0.05 g per mm² of the 22×36 mm track envelope — inertia that the drive must accelerate on every index of the cam at 10 mm stud shank this is one of the smallest HR1 executions — chosen where a 22 mm envelope must carry line-contact loads that no miniature ball bearing could take Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 36 mm overall stud length The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 36 mm width. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 22 mm track diameter and 4.55 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 43 g mass keeps follower kinetics light. Designers also specify it for robotic arm linear axes, relying on the 36 mm stud length and the published 5.4 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. The eccentric collar throw is small (typically around 1 mm); it removes clearance, it cannot repair a grossly misplaced bracket.", "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": [ "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "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." ], "faq": [ { "q": "What are the dimensions of the KR22-PP?", "a": "The KR22-PP is a KR stud-type cam follower with needle roller and cage assembly with 22 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×22×36 mm. Mass is 43 g." }, { "q": "What does the KR22-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR22-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×22×36 mm and the catalogue ratings are C 4.55 kN, C0 5.4 kN, Cur 0.74 kN." }, { "q": "What is the load capacity of the KR22-PP?", "a": "The basic dynamic load rating C is 4.55 kN and the basic static load rating C0 is 5.4 kN; the fatigue load limit Cur is 0.74 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 KR22-PP?", "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": "How is a stud-type roller like the KR22-PP fitted and adjusted?", "a": "The 10 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 22 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR22", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR22-PP", "KR22-PP" ], "locale_variants": {} }, { "sku": "KRE22-PP", "brand": "FAG", "manufacturer_designation": "KRE22-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 10, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.55, "static_load_kN": 5.4, "fatigue_load_limit_kN": 0.74, "limiting_speed_rpm": 8000, "max_rpm": 8000, "weight_g": 47, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×22×36 mm: the 22 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 4.55 kN and C0 5.4 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.84 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 0.74 kN at 10 mm stud, equivalent to 0.45 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.13 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 47 g, or 0.06 g per mm² of the 22×36 mm track envelope — inertia that the drive must accelerate on every index of the cam at 10 mm stud shank this is one of the smallest HR1 executions — chosen where a 22 mm envelope must carry line-contact loads that no miniature ball bearing could take KRE adds the eccentric locking collar: rotating the collar on the stud re-centres the roller against the cam to set preload or compensate wear without re-machining the bracket The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately The PP seals make this a maintenance-free unit: the 4.55 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 22 mm track diameter and 4.55 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 47 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 36 mm stud length and the published 5.4 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. 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": [ "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 stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.", "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." ], "faq": [ { "q": "What are the dimensions of the KRE22-PP?", "a": "The KRE22-PP is a KRE stud-type cam follower with eccentric locking collar with 22 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×22×36 mm. Mass is 47 g." }, { "q": "What does the KRE22-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE22-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×22×36 mm and the catalogue ratings are C 4.55 kN, C0 5.4 kN, Cur 0.74 kN." }, { "q": "What is the load capacity of the KRE22-PP?", "a": "The basic dynamic load rating C is 4.55 kN and the basic static load rating C0 is 5.4 kN; the fatigue load limit Cur is 0.74 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 KRE22-PP?", "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": "How is a stud-type roller like the KRE22-PP fitted and adjusted?", "a": "The 10 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 22 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRE22", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE22-PP", "KRE22-PP" ], "locale_variants": {} }, { "sku": "KRV22-PP", "brand": "FAG", "manufacturer_designation": "KRV22-PP", "series": "krv-series", "type": "cam_follower", "d_mm": 10, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "none", "dynamic_load_kN": 6.2, "static_load_kN": 9.3, "fatigue_load_limit_kN": 1.23, "limiting_speed_rpm": 2600, "max_rpm": 2600, "weight_g": 45, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×22×36 mm: the 22 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 6.2 kN and C0 9.3 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.67 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 1.23 kN at 10 mm stud, equivalent to 0.62 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.17 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 45 g, or 0.06 g per mm² of the 22×36 mm track envelope — inertia that the drive must accelerate on every index of the cam at 10 mm stud shank this is one of the smallest HR1 executions — chosen where a 22 mm envelope must carry line-contact loads that no miniature ball bearing could take The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload The full complement raises static capacity but lowers the speed ceiling and generates more friction torque — slow, heavily loaded cams are its duty -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 36 mm width. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 22 mm track diameter and 6.2 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 45 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 36 mm stud length and the published 9.3 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": [ "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": [ "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 KRV22-PP?", "a": "The KRV22-PP is a KRV full-complement stud-type cam follower with 22 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×22×36 mm. Mass is 45 g." }, { "q": "What does the KRV22-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV22-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×22×36 mm and the catalogue ratings are C 6.2 kN, C0 9.3 kN, Cur 1.23 kN." }, { "q": "What is the load capacity of the KRV22-PP?", "a": "The basic dynamic load rating C is 6.2 kN and the basic static load rating C0 is 9.3 kN; the fatigue load limit Cur is 1.23 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 KRV22-PP?", "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 KRV22-PP fitted and adjusted?", "a": "The 10 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 22 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRV22", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV22-PP", "KRV22-PP" ], "locale_variants": {} }, { "sku": "KR26", "brand": "FAG", "manufacturer_designation": "KR26", "series": "kr-series", "type": "cam_follower", "d_mm": 10, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 5.1, "static_load_kN": 6.5, "fatigue_load_limit_kN": 0.86, "limiting_speed_rpm": 8000, "max_rpm": 8000, "weight_g": 59, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×26×36 mm: the 26 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 5.1 kN and C0 6.5 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.78 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 0.86 kN at 10 mm stud, equivalent to 0.51 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.14 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 59 g, or 0.06 g per mm² of the 26×36 mm track envelope — inertia that the drive must accelerate on every index of the cam 10 mm stud shank and only 59 g: the smallest sizes demand accurate shaft geometry, because the 8.0 mm section leaves no tolerance for a soft or tapered seat The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 6.5 kN static rating and skews the outer ring Typical applications include printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 26 mm track diameter and 5.1 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 59 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 36 mm stud length and the published 6.5 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. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 36 mm stud unusable.", "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": [ "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 36 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 KR26?", "a": "The KR26 is a KR stud-type cam follower with needle roller and cage assembly with 26 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×26×36 mm. Mass is 59 g." }, { "q": "What does the KR26 designation mean in the FAG/INA HR1 catalogue?", "a": "KR26 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×26×36 mm and the catalogue ratings are C 5.1 kN, C0 6.5 kN, Cur 0.86 kN." }, { "q": "What is the load capacity of the KR26?", "a": "The basic dynamic load rating C is 5.1 kN and the basic static load rating C0 is 6.5 kN; the fatigue load limit Cur is 0.86 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 KR26?", "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": "How is a stud-type roller like the KR26 fitted and adjusted?", "a": "The 10 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 26 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR26-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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR26", "KR26" ], "locale_variants": {} }, { "sku": "KR26-PP", "brand": "FAG", "manufacturer_designation": "KR26-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 10, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 5.1, "static_load_kN": 6.5, "fatigue_load_limit_kN": 0.86, "limiting_speed_rpm": 8000, "max_rpm": 8000, "weight_g": 57, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×26×36 mm: the 26 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 5.1 kN and C0 6.5 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.78 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 0.86 kN at 10 mm stud, equivalent to 0.51 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.14 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 57 g, or 0.06 g per mm² of the 26×36 mm track envelope — inertia that the drive must accelerate on every index of the cam 10 mm stud shank and only 57 g: the smallest sizes demand accurate shaft geometry, because the 8.0 mm section leaves no tolerance for a soft or tapered seat The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately Reading -PP: rubbing seals at each face of the 26 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. Typical applications include cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 26 mm track diameter and 5.1 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 57 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 36 mm stud length and the published 6.5 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. 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 KR26-PP?", "a": "The KR26-PP is a KR stud-type cam follower with needle roller and cage assembly with 26 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×26×36 mm. Mass is 57 g." }, { "q": "What does the KR26-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR26-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×26×36 mm and the catalogue ratings are C 5.1 kN, C0 6.5 kN, Cur 0.86 kN." }, { "q": "What is the load capacity of the KR26-PP?", "a": "The basic dynamic load rating C is 5.1 kN and the basic static load rating C0 is 6.5 kN; the fatigue load limit Cur is 0.86 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 KR26-PP?", "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": "How is a stud-type roller like the KR26-PP fitted and adjusted?", "a": "The 10 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 26 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR26", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR26-PP", "KR26-PP" ], "locale_variants": {} }, { "sku": "KRE26-PP", "brand": "FAG", "manufacturer_designation": "KRE26-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 10, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 5.1, "static_load_kN": 6.5, "fatigue_load_limit_kN": 0.86, "limiting_speed_rpm": 8000, "max_rpm": 8000, "weight_g": 62, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×26×36 mm: the 26 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 5.1 kN and C0 6.5 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.78 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 0.86 kN at 10 mm stud, equivalent to 0.51 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.14 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 62 g, or 0.07 g per mm² of the 26×36 mm track envelope — inertia that the drive must accelerate on every index of the cam at 10 mm stud shank this is one of the smallest HR1 executions — chosen where a 26 mm envelope must carry line-contact loads that no miniature ball bearing could take KR is the stud-type cam follower with a needle roller and cage assembly: the 10 mm threaded stud bolts into the bracket and the 26 mm crowned outer ring follows the cam Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 36 mm overall stud length The PP seals make this a maintenance-free unit: the 5.1 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 26 mm track diameter and 5.1 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 62 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 36 mm stud length and the published 6.5 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": [ "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 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 36 mm stud unusable." ], "faq": [ { "q": "What are the dimensions of the KRE26-PP?", "a": "The KRE26-PP is a KRE stud-type cam follower with eccentric locking collar with 26 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×26×36 mm. Mass is 62 g." }, { "q": "What does the KRE26-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE26-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×26×36 mm and the catalogue ratings are C 5.1 kN, C0 6.5 kN, Cur 0.86 kN." }, { "q": "What is the load capacity of the KRE26-PP?", "a": "The basic dynamic load rating C is 5.1 kN and the basic static load rating C0 is 6.5 kN; the fatigue load limit Cur is 0.86 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 KRE26-PP?", "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": "How is a stud-type roller like the KRE26-PP fitted and adjusted?", "a": "The 10 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 26 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRE26", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE26-PP", "KRE26-PP" ], "locale_variants": {} }, { "sku": "KRV26-PP", "brand": "FAG", "manufacturer_designation": "KRV26-PP", "series": "krv-series", "type": "cam_follower", "d_mm": 10, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "none", "dynamic_load_kN": 7.3, "static_load_kN": 11.6, "fatigue_load_limit_kN": 1.52, "limiting_speed_rpm": 2600, "max_rpm": 2600, "weight_g": 59, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 10×26×36 mm: the 26 mm outside diameter is the track-running surface — a thick-walled outer ring over a 10 mm stud — and the 36 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 7.3 kN and C0 11.6 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.63 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 1.52 kN at 10 mm stud, equivalent to 0.73 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 10 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.20 kN per millimetre of rolling-element complement within the 36 mm overall stud length mass is 59 g, or 0.06 g per mm² of the 26×36 mm track envelope — inertia that the drive must accelerate on every index of the cam 10 mm stud shank and only 59 g: the smallest sizes demand accurate shaft geometry, because the 8.0 mm section leaves no tolerance for a soft or tapered seat C 7.3 kN, C0 11.6 kN and Cur 1.52 kN are the cam-contact ratings; the limiting speed is 2,600 r/min with no reference speed published The full complement raises static capacity but lowers the speed ceiling and generates more friction torque — slow, heavily loaded cams are its duty -PP protection suits cams and rails that are washed down or run in dust; exceeding the 2,600 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 26 mm track diameter and 7.3 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 59 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 36 mm stud length and the published 11.6 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. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.", "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 KRV26-PP?", "a": "The KRV26-PP is a KRV full-complement stud-type cam follower with 26 mm outside diameter, 10 mm stud diameter and 36 mm overall length, envelope 10×26×36 mm. Mass is 59 g." }, { "q": "What does the KRV26-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV26-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 10×26×36 mm and the catalogue ratings are C 7.3 kN, C0 11.6 kN, Cur 1.52 kN." }, { "q": "What is the load capacity of the KRV26-PP?", "a": "The basic dynamic load rating C is 7.3 kN and the basic static load rating C0 is 11.6 kN; the fatigue load limit Cur is 1.52 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 KRV26-PP?", "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 KRV26-PP fitted and adjusted?", "a": "The 10 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 26 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRV26", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV26-PP", "KRV26-PP" ], "locale_variants": {} }, { "sku": "KR30", "brand": "FAG", "manufacturer_designation": "KR30", "series": "kr-series", "type": "cam_follower", "d_mm": 12, "D_mm": 30, "B_mm": 40, "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": 92, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×30×40 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 6.8 kN and C0 8.7 kN for the KR stud-type cam follower with needle roller and cage assembly; 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 1.24 kN at 12 mm stud, equivalent to 0.57 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 12 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.17 kN per millimetre of rolling-element complement within the 40 mm overall stud length mass is 92 g, or 0.08 g per mm² of the 30×40 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm stud shank 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 The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload 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 6.8 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 92 g mass keeps follower kinetics light. Designers also specify it for cam drives and indexing tables, relying on the 40 mm stud length and the published 8.7 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": [ "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": [ "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 KR30?", "a": "The KR30 is a KR stud-type cam follower with needle roller and cage assembly with 30 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×30×40 mm. Mass is 92 g." }, { "q": "What does the KR30 designation mean in the FAG/INA HR1 catalogue?", "a": "KR30 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×30×40 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 KR30?", "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 KR30?", "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 KR30 fitted and adjusted?", "a": "The 12 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 30 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR30-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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR30", "KR30" ], "locale_variants": {} }, { "sku": "KR30-PP", "brand": "FAG", "manufacturer_designation": "KR30-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 12, "D_mm": 30, "B_mm": 40, "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": 88, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×30×40 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 6.8 kN and C0 8.7 kN for the KR stud-type cam follower with needle roller and cage assembly; 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 1.24 kN at 12 mm stud, equivalent to 0.57 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 12 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.17 kN per millimetre of rolling-element complement within the 40 mm overall stud length mass is 88 g, or 0.07 g per mm² of the 30×40 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm stud shank 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 The caged pack keeps friction and inertia low — at 88 g this is the follower for fast indexing drives and high-cycle linkages The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 40 mm width. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 30 mm track diameter and 6.8 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 88 g mass keeps follower kinetics light. Designers also specify it for agricultural and textile cam followers, relying on the 40 mm stud length and the published 8.7 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": [ "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": [ "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 KR30-PP?", "a": "The KR30-PP is a KR stud-type cam follower with needle roller and cage assembly with 30 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×30×40 mm. Mass is 88 g." }, { "q": "What does the KR30-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR30-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×30×40 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 KR30-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 KR30-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": "How is a stud-type roller like the KR30-PP fitted and adjusted?", "a": "The 12 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 30 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR30", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR30-PP", "KR30-PP" ], "locale_variants": {} }, { "sku": "KRE30-PP", "brand": "FAG", "manufacturer_designation": "KRE30-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 12, "D_mm": 30, "B_mm": 40, "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": 93, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×30×40 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 6.8 kN and C0 8.7 kN for the KRE stud-type cam follower with eccentric locking collar; 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 1.24 kN at 12 mm stud, equivalent to 0.57 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 12 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.17 kN per millimetre of rolling-element complement within the 40 mm overall stud length mass is 93 g, or 0.08 g per mm² of the 30×40 mm track envelope — inertia that the drive must accelerate on every index of the cam the 12 mm stud shank sits in the miniature band; at 40 mm wide the KRE30-PP is built into compact cam drives, indexing pawls and light linkages KR is the stud-type cam follower with a needle roller and cage assembly: the 12 mm threaded stud bolts into the bracket and the 30 mm crowned outer ring follows the cam The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 8.7 kN static rating and skews the outer ring -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 automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 30 mm track diameter and 6.8 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 93 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 40 mm stud length and the published 8.7 kN static rating. 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.", "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.", "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 40 mm stud unusable." ], "faq": [ { "q": "What are the dimensions of the KRE30-PP?", "a": "The KRE30-PP is a KRE stud-type cam follower with eccentric locking collar with 30 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×30×40 mm. Mass is 93 g." }, { "q": "What does the KRE30-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE30-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×30×40 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 KRE30-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 KRE30-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": "How is a stud-type roller like the KRE30-PP fitted and adjusted?", "a": "The 12 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 30 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRE30", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE30-PP", "KRE30-PP" ], "locale_variants": {} }, { "sku": "KRV30-PP", "brand": "FAG", "manufacturer_designation": "KRV30-PP", "series": "krv-series", "type": "cam_follower", "d_mm": 12, "D_mm": 30, "B_mm": 40, "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": 91, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×30×40 mm: the 30 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 9.4 kN and C0 15.1 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.62 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 2.08 kN at 12 mm stud, equivalent to 0.78 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 12 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 40 mm overall stud length mass is 91 g, or 0.08 g per mm² of the 30×40 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm stud shank 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 KRV is the full-complement stud-type cam follower: a cageless needle pack maximises C0 15.1 kN inside the 30 mm outer ring on the 12 mm stud Reading -PP: rubbing seals at each face of the 30 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 30 mm track diameter and 9.4 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 91 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 40 mm stud length and the published 15.1 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": [ "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": [ "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 KRV30-PP?", "a": "The KRV30-PP is a KRV full-complement stud-type cam follower with 30 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×30×40 mm. Mass is 91 g." }, { "q": "What does the KRV30-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV30-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×30×40 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 KRV30-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 KRV30-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": "How is a stud-type roller like the KRV30-PP fitted and adjusted?", "a": "The 12 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 30 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRV30", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV30-PP", "KRV30-PP" ], "locale_variants": {} }, { "sku": "KR32", "brand": "FAG", "manufacturer_designation": "KR32", "series": "kr-series", "type": "cam_follower", "d_mm": 12, "D_mm": 32, "B_mm": 40, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 7.1, "static_load_kN": 9.3, "fatigue_load_limit_kN": 1.32, "limiting_speed_rpm": 5500, "max_rpm": 5500, "weight_g": 103, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×32×40 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 7.1 kN and C0 9.3 kN for the KR stud-type cam follower with needle roller and cage assembly; 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 stud, equivalent to 0.59 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 12 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.18 kN per millimetre of rolling-element complement within the 40 mm overall stud length mass is 103 g, or 0.08 g per mm² of the 32×40 mm track envelope — inertia that the drive must accelerate on every index of the cam 12 mm stud shank and only 103 g: the smallest sizes demand accurate shaft geometry, because the 10.0 mm section leaves no tolerance for a soft or tapered seat The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 32 mm track diameter and 7.1 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 103 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 40 mm stud length and the published 9.3 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. 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 stud must be fully supported and the nut torqued to the catalogue value; a loose follower wears the bracket hole oval and loosens further.", "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." ], "faq": [ { "q": "What are the dimensions of the KR32?", "a": "The KR32 is a KR stud-type cam follower with needle roller and cage assembly with 32 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×32×40 mm. Mass is 103 g." }, { "q": "What does the KR32 designation mean in the FAG/INA HR1 catalogue?", "a": "KR32 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×40 mm and the catalogue ratings are C 7.1 kN, C0 9.3 kN, Cur 1.32 kN." }, { "q": "What is the load capacity of the KR32?", "a": "The basic dynamic load rating C is 7.1 kN and the basic static load rating C0 is 9.3 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 KR32?", "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 KR32 fitted and adjusted?", "a": "The 12 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 32 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR32-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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR32", "KR32" ], "locale_variants": {} }, { "sku": "KR32-PP", "brand": "FAG", "manufacturer_designation": "KR32-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 12, "D_mm": 32, "B_mm": 40, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 7.1, "static_load_kN": 9.3, "fatigue_load_limit_kN": 1.32, "limiting_speed_rpm": 5500, "max_rpm": 5500, "weight_g": 98, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×32×40 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 7.1 kN and C0 9.3 kN for the KR stud-type cam follower with needle roller and cage assembly; 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 stud, equivalent to 0.59 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 12 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.18 kN per millimetre of rolling-element complement within the 40 mm overall stud length mass is 98 g, or 0.08 g per mm² of the 32×40 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm stud shank 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 7.1 kN, C0 9.3 kN and Cur 1.32 kN are the cam-contact ratings; the limiting speed is 5,500 r/min with no reference speed published The PP seals make this a maintenance-free unit: the 7.1 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 32 mm track diameter and 7.1 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 98 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 40 mm stud length and the published 9.3 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": [ "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": [ "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 KR32-PP?", "a": "The KR32-PP is a KR stud-type cam follower with needle roller and cage assembly with 32 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×32×40 mm. Mass is 98 g." }, { "q": "What does the KR32-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR32-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×40 mm and the catalogue ratings are C 7.1 kN, C0 9.3 kN, Cur 1.32 kN." }, { "q": "What is the load capacity of the KR32-PP?", "a": "The basic dynamic load rating C is 7.1 kN and the basic static load rating C0 is 9.3 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 KR32-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": "How is a stud-type roller like the KR32-PP fitted and adjusted?", "a": "The 12 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 32 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KR32", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR32-PP", "KR32-PP" ], "locale_variants": {} }, { "sku": "KRE32-PP", "brand": "FAG", "manufacturer_designation": "KRE32-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 12, "D_mm": 32, "B_mm": 40, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 7.1, "static_load_kN": 9.3, "fatigue_load_limit_kN": 1.32, "limiting_speed_rpm": 5500, "max_rpm": 5500, "weight_g": 104, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×32×40 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 7.1 kN and C0 9.3 kN for the KRE stud-type cam follower with eccentric locking collar; 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 stud, equivalent to 0.59 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 12 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.18 kN per millimetre of rolling-element complement within the 40 mm overall stud length mass is 104 g, or 0.08 g per mm² of the 32×40 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm stud shank 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 7.1 kN, C0 9.3 kN and Cur 1.32 kN are the cam-contact ratings; the limiting speed is 5,500 r/min with no reference speed published The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately 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 robotic arm linear axes, agricultural and textile cam followers and conveyor transfer and diverting stations, where the 32 mm track diameter and 7.1 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 104 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 40 mm stud length and the published 9.3 kN static rating. Never hammer the stud or use the hex socket as a press point during mounting; thread or socket damage renders the 40 mm stud unusable. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 40 mm stud unusable.", "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 KRE32-PP?", "a": "The KRE32-PP is a KRE stud-type cam follower with eccentric locking collar with 32 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×32×40 mm. Mass is 104 g." }, { "q": "What does the KRE32-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE32-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×40 mm and the catalogue ratings are C 7.1 kN, C0 9.3 kN, Cur 1.32 kN." }, { "q": "What is the load capacity of the KRE32-PP?", "a": "The basic dynamic load rating C is 7.1 kN and the basic static load rating C0 is 9.3 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 KRE32-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": "How is a stud-type roller like the KRE32-PP fitted and adjusted?", "a": "The 12 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 32 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRE32", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE32-PP", "KRE32-PP" ], "locale_variants": {} }, { "sku": "KRV32-PP", "brand": "FAG", "manufacturer_designation": "KRV32-PP", "series": "krv-series", "type": "cam_follower", "d_mm": 12, "D_mm": 32, "B_mm": 40, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "none", "dynamic_load_kN": 10, "static_load_kN": 16.3, "fatigue_load_limit_kN": 2.24, "limiting_speed_rpm": 2100, "max_rpm": 2100, "weight_g": 101, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "envelope 12×32×40 mm: the 32 mm outside diameter is the track-running surface — a thick-walled outer ring over a 12 mm stud — and the 40 mm overall stud-and-roller length sets the required bracket clearance the catalogue lists C 10 kN and C0 16.3 kN for the KRV full-complement stud-type cam follower; 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 2.24 kN at 12 mm stud, equivalent to 0.83 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 12 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 40 mm overall stud length mass is 101 g, or 0.08 g per mm² of the 32×40 mm track envelope — inertia that the drive must accelerate on every index of the cam at 12 mm stud shank 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 The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately The PP seals make this a maintenance-free unit: the 10 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 32 mm track diameter and 10 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 101 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 40 mm stud length and the published 16.3 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. 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": [ "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": [ "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.", "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." ], "faq": [ { "q": "What are the dimensions of the KRV32-PP?", "a": "The KRV32-PP is a KRV full-complement stud-type cam follower with 32 mm outside diameter, 12 mm stud diameter and 40 mm overall length, envelope 12×32×40 mm. Mass is 101 g." }, { "q": "What does the KRV32-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV32-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 12×32×40 mm and the catalogue ratings are C 10 kN, C0 16.3 kN, Cur 2.24 kN." }, { "q": "What is the load capacity of the KRV32-PP?", "a": "The basic dynamic load rating C is 10 kN and the basic static load rating C0 is 16.3 kN; the fatigue load limit Cur is 2.24 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 KRV32-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": "How is a stud-type roller like the KRV32-PP fitted and adjusted?", "a": "The 12 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 32 mm outer ring then runs directly on the cam." } ], "cross_ref": [ { "equiv_sku": "KRV32", "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=1455", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV32-PP", "KRV32-PP" ], "locale_variants": {} }, { "sku": "KR35", "brand": "FAG", "manufacturer_designation": "KR35", "series": "kr-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 173, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 9.7 kN and C0 14.5 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.67 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 1.86 kN at 16 mm stud, equivalent to 0.61 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 16 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.19 kN per millimetre of rolling-element complement within the 52 mm overall stud length mass is 173 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 9.7 kN C rating suit high-cycle industrial machinery rather than instrument duty Reading KR/KRV/KRE: stud-type needle cam followers in the open execution and a 52 mm overall stud length The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 35 mm track diameter and 9.7 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 173 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 52 mm stud length and the published 14.5 kN static rating. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement. 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": [ "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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." ], "faq": [ { "q": "What are the dimensions of the KR35?", "a": "The KR35 is a KR stud-type cam follower with needle roller and cage assembly with 35 mm outside diameter, 16 mm stud diameter and 52 mm overall length, envelope 16×35×52 mm. Mass is 173 g." }, { "q": "What does the KR35 designation mean in the FAG/INA HR1 catalogue?", "a": "KR35 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×35×52 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 KR35?", "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 KR35?", "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": "How is a stud-type roller like the KR35 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": "KR35-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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR35", "KR35" ], "locale_variants": {} }, { "sku": "KR35-PP", "brand": "FAG", "manufacturer_designation": "KR35-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 164, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 9.7 kN and C0 14.5 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.67 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 1.86 kN at 16 mm stud, equivalent to 0.61 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 16 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.19 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 9.7 kN C rating suit high-cycle industrial machinery rather than instrument duty The caged pack keeps friction and inertia low — at 164 g this is the follower for fast indexing drives and high-cycle linkages Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 52 mm overall stud length 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 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 threaded stud bolts directly to the frame, and in linear rail and profile track guidance the 164 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 52 mm stud length and the published 14.5 kN static rating. 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.", "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": [ "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.", "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 KR35-PP?", "a": "The KR35-PP is a KR stud-type cam follower with needle roller and cage assembly 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 KR35-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR35-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×35×52 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 KR35-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 KR35-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": "How is a stud-type roller like the KR35-PP 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": "KR35", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR35-PP", "KR35-PP" ], "locale_variants": {} }, { "sku": "KRE35-PP", "brand": "FAG", "manufacturer_designation": "KRE35-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 177, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 9.7 kN and C0 14.5 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.67 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 1.86 kN at 16 mm stud, equivalent to 0.61 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 16 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.19 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 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 The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately -PP protection suits cams and rails that are washed down or run in dust; exceeding the 3,600 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 35 mm track diameter and 9.7 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 177 g mass keeps follower kinetics light. Designers also specify it for automatic assembly machine carriages, relying on the 52 mm stud length and the published 14.5 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. 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": [ "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": [ "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 KRE35-PP?", "a": "The KRE35-PP is a KRE stud-type cam follower 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 KRE35-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE35-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×35×52 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 KRE35-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 KRE35-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": "How is a stud-type roller like the KRE35-PP 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": "KRE35", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE35-PP", "KRE35-PP" ], "locale_variants": {} }, { "sku": "KRV35-PP", "brand": "FAG", "manufacturer_designation": "KRV35-PP", "series": "krv-series", "type": "cam_follower", "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": 23.4, "fatigue_load_limit_kN": 3.25, "limiting_speed_rpm": 1600, "max_rpm": 1600, "weight_g": 166, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 23.4 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.54 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 3.25 kN at 16 mm stud, equivalent to 0.79 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 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 166 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 The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 23.4 kN static rating and skews the outer ring KRV is the full-complement stud-type cam follower: a cageless needle pack maximises C0 23.4 kN inside the 35 mm outer ring on the 16 mm stud The PP seals make this a maintenance-free unit: the 12.6 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 35 mm track diameter and 12.6 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 166 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 52 mm stud length and the published 23.4 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. 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.", "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": [ "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "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 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 KRV35-PP?", "a": "The KRV35-PP is a KRV full-complement stud-type cam follower with 35 mm outside diameter, 16 mm stud diameter and 52 mm overall length, envelope 16×35×52 mm. Mass is 166 g." }, { "q": "What does the KRV35-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV35-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 16×35×52 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 KRV35-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 KRV35-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": "How is a stud-type roller like the KRV35-PP 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": "KRV35", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV35-PP", "KRV35-PP" ], "locale_variants": {} }, { "sku": "KR40", "brand": "FAG", "manufacturer_designation": "KR40", "series": "kr-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 247, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 10.9 kN and C0 16 kN for the KR stud-type cam follower with needle roller and cage assembly; 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 2.13 kN at 18 mm stud, equivalent to 0.61 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 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.19 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 247 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 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 The caged pack keeps friction and inertia low — at 247 g this is the follower for fast indexing drives and high-cycle linkages Reading KR/KRV/KRE: stud-type needle cam followers in the open execution and a 58 mm overall stud length Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 40 mm track diameter and 10.9 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 247 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 16 kN static rating. 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.", "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": [ "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.", "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 KR40?", "a": "The KR40 is a KR stud-type cam follower with needle roller and cage assembly with 40 mm outside diameter, 18 mm stud diameter and 58 mm overall length, envelope 18×40×58 mm. Mass is 247 g." }, { "q": "What does the KR40 designation mean in the FAG/INA HR1 catalogue?", "a": "KR40 identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 18×40×58 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 KR40?", "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 KR40?", "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": "How is a stud-type roller like the KR40 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": "KR40-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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR40", "KR40" ], "locale_variants": {} }, { "sku": "KR40-PP", "brand": "FAG", "manufacturer_designation": "KR40-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 239, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 10.9 kN and C0 16 kN for the KR stud-type cam follower with needle roller and cage assembly; 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 2.13 kN at 18 mm stud, equivalent to 0.61 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 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.19 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 239 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 The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 16 kN static rating and skews the outer ring C 10.9 kN, C0 16 kN and Cur 2.13 kN are the cam-contact ratings; the limiting speed is 2,900 r/min with no reference speed published -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 58 mm width. Typical applications include agricultural and textile cam followers, packaging machine timing mechanisms and robotic arm linear axes, where the 40 mm track diameter and 10.9 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 239 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 16 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 58 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 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 KR40-PP?", "a": "The KR40-PP is a KR stud-type cam follower with needle roller and cage assembly with 40 mm outside diameter, 18 mm stud diameter and 58 mm overall length, envelope 18×40×58 mm. Mass is 239 g." }, { "q": "What does the KR40-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR40-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 18×40×58 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 KR40-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 KR40-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": "How is a stud-type roller like the KR40-PP 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": "KR40", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR40-PP", "KR40-PP" ], "locale_variants": {} }, { "sku": "KRE40-PP", "brand": "FAG", "manufacturer_designation": "KRE40-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 255, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 10.9 kN and C0 16 kN for the KRE stud-type cam follower with eccentric locking collar; 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 2.13 kN at 18 mm stud, equivalent to 0.61 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 18 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.19 kN per millimetre of rolling-element complement within the 58 mm overall stud length mass is 255 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 C 10.9 kN, C0 16 kN and Cur 2.13 kN are the cam-contact ratings; the limiting speed is 2,900 r/min with no reference speed published KR is the stud-type cam follower with a needle roller and cage assembly: the 18 mm threaded stud bolts into the bracket and the 40 mm crowned outer ring follows the cam -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 cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 40 mm track diameter and 10.9 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 255 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 58 mm stud length and the published 16 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": [ "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": [ "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.", "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 KRE40-PP?", "a": "The KRE40-PP is a KRE stud-type cam follower 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 255 g." }, { "q": "What does the KRE40-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE40-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 18×40×58 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 KRE40-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 KRE40-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": "How is a stud-type roller like the KRE40-PP 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": "KRE40", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE40-PP", "KRE40-PP" ], "locale_variants": {} }, { "sku": "KRV40-PP", "brand": "FAG", "manufacturer_designation": "KRV40-PP", "series": "krv-series", "type": "cam_follower", "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": 14.7, "static_load_kN": 27, "fatigue_load_limit_kN": 3.55, "limiting_speed_rpm": 1400, "max_rpm": 1400, "weight_g": 247, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 14.7 kN and C0 27 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.54 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 3.55 kN at 18 mm stud, equivalent to 0.82 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 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 247 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 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 The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload KRV is the full-complement stud-type cam follower: a cageless needle pack maximises C0 27 kN inside the 40 mm outer ring on the 18 mm stud -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 cam drives and indexing tables, printing press sheet-transfer grippers and woodworking machine feed tracks, where the 40 mm track diameter and 14.7 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 247 g mass keeps follower kinetics light. Designers also specify it for woodworking machine feed tracks, relying on the 58 mm stud length and the published 27 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": [ "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": [ "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 KRV40-PP?", "a": "The KRV40-PP is a KRV full-complement stud-type cam follower with 40 mm outside diameter, 18 mm stud diameter and 58 mm overall length, envelope 18×40×58 mm. Mass is 247 g." }, { "q": "What does the KRV40-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV40-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 18×40×58 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 KRV40-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 KRV40-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": "How is a stud-type roller like the KRV40-PP 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": "KRV40", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV40-PP", "KRV40-PP" ], "locale_variants": {} }, { "sku": "KR47-PP", "brand": "FAG", "manufacturer_designation": "KR47-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 20, "D_mm": 47, "B_mm": 66, "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": 381, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 15.4 kN and C0 26 kN for the KR stud-type cam follower with needle roller and cage assembly; 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 stud, 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.23 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 381 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 15.4 kN C rating suit high-cycle industrial machinery rather than instrument duty KR is the stud-type cam follower with a needle roller and cage assembly: the 20 mm threaded stud bolts into the bracket and the 47 mm crowned outer ring follows the cam The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload The PP seals make this a maintenance-free unit: the 15.4 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. 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 15.4 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 381 g mass keeps follower kinetics light. Designers also specify it for printing press sheet-transfer grippers, relying on the 66 mm stud length and the published 26 kN static rating. 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.", "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": [ "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.", "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 KR47-PP?", "a": "The KR47-PP is a KR stud-type cam follower with needle roller and cage assembly with 47 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×47×66 mm. Mass is 381 g." }, { "q": "What does the KR47-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR47-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×66 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 KR47-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 KR47-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": "How is a stud-type roller like the KR47-PP 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": "KR47", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR47-PP", "KR47-PP" ], "locale_variants": {} }, { "sku": "KRE47-PP", "brand": "FAG", "manufacturer_designation": "KRE47-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 20, "D_mm": 47, "B_mm": 66, "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": 400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 15.4 kN and C0 26 kN for the KRE stud-type cam follower with eccentric locking collar; 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 stud, 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.23 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 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 KR is the stud-type cam follower with a needle roller and cage assembly: the 20 mm threaded stud bolts into the bracket and the 47 mm crowned outer ring follows the cam Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 66 mm overall stud length 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 automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 47 mm track diameter and 15.4 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 400 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 26 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": [ "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.", "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 66 mm stud unusable." ], "faq": [ { "q": "What are the dimensions of the KRE47-PP?", "a": "The KRE47-PP is a KRE stud-type cam follower 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 KRE47-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE47-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×66 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 KRE47-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 KRE47-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": "How is a stud-type roller like the KRE47-PP 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": "KRE47", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE47-PP", "KRE47-PP" ], "locale_variants": {} }, { "sku": "KRV47-PP", "brand": "FAG", "manufacturer_designation": "KRV47-PP", "series": "krv-series", "type": "cam_follower", "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": 20.3, "static_load_kN": 42.5, "fatigue_load_limit_kN": 6, "limiting_speed_rpm": 1300, "max_rpm": 1300, "weight_g": 390, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 20.3 kN and C0 42.5 kN for the KRV full-complement stud-type cam follower; 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 stud, 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.31 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 390 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 20.3 kN C rating suit high-cycle industrial machinery rather than instrument duty The full complement raises static capacity but lowers the speed ceiling and generates more friction torque — slow, heavily loaded cams are its duty C 20.3 kN, C0 42.5 kN and Cur 6 kN are the cam-contact ratings; the limiting speed is 1,300 r/min with no reference speed published -PP protection suits cams and rails that are washed down or run in dust; exceeding the 1,300 r/min speed ceiling overheats the lips rather than just accelerating wear. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 47 mm track diameter and 20.3 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 390 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 42.5 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": [ "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": [ "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.", "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 KRV47-PP?", "a": "The KRV47-PP is a KRV full-complement stud-type cam follower with 47 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×47×66 mm. Mass is 390 g." }, { "q": "What does the KRV47-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV47-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×47×66 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 KRV47-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 KRV47-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": "How is a stud-type roller like the KRV47-PP 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": "KRV47", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV47-PP", "KRV47-PP" ], "locale_variants": {} }, { "sku": "KR52-PP", "brand": "FAG", "manufacturer_designation": "KR52-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 20, "D_mm": 52, "B_mm": 66, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 16.6, "static_load_kN": 29.5, "fatigue_load_limit_kN": 3.85, "limiting_speed_rpm": 2400, "max_rpm": 2400, "weight_g": 454, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 16.6 kN and C0 29.5 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.56 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 3.85 kN at 20 mm stud, equivalent to 0.83 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 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 66 mm overall stud length mass is 454 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 The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 29.5 kN static rating and skews the outer ring The PP seals make this a maintenance-free unit: the 16.6 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 52 mm track diameter and 16.6 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 454 g mass keeps follower kinetics light. Designers also specify it for linear rail and profile track guidance, relying on the 66 mm stud length and the published 29.5 kN static rating. 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.", "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": [ "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.", "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." ], "faq": [ { "q": "What are the dimensions of the KR52-PP?", "a": "The KR52-PP is a KR stud-type cam follower with needle roller and cage assembly with 52 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×52×66 mm. Mass is 454 g." }, { "q": "What does the KR52-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR52-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×52×66 mm and the catalogue ratings are C 16.6 kN, C0 29.5 kN, Cur 3.85 kN." }, { "q": "What is the load capacity of the KR52-PP?", "a": "The basic dynamic load rating C is 16.6 kN and the basic static load rating C0 is 29.5 kN; the fatigue load limit Cur is 3.85 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 KR52-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": "How is a stud-type roller like the KR52-PP 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": "KR52", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR52-PP", "KR52-PP" ], "locale_variants": {} }, { "sku": "KRE52-PP", "brand": "FAG", "manufacturer_designation": "KRE52-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 20, "D_mm": 52, "B_mm": 66, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 16.6, "static_load_kN": 29.5, "fatigue_load_limit_kN": 3.85, "limiting_speed_rpm": 2400, "max_rpm": 2400, "weight_g": 473, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 16.6 kN and C0 29.5 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.56 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 3.85 kN at 20 mm stud, equivalent to 0.83 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 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 66 mm overall stud length mass is 473 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 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 KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 66 mm overall stud length The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately -PP protection suits cams and rails that are washed down or run in dust; exceeding the 2,400 r/min speed ceiling overheats the lips rather than just accelerating wear. 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 16.6 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 473 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 29.5 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. 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": [ "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "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." ], "faq": [ { "q": "What are the dimensions of the KRE52-PP?", "a": "The KRE52-PP is a KRE stud-type cam follower 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 473 g." }, { "q": "What does the KRE52-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE52-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×52×66 mm and the catalogue ratings are C 16.6 kN, C0 29.5 kN, Cur 3.85 kN." }, { "q": "What is the load capacity of the KRE52-PP?", "a": "The basic dynamic load rating C is 16.6 kN and the basic static load rating C0 is 29.5 kN; the fatigue load limit Cur is 3.85 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 KRE52-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": "How is a stud-type roller like the KRE52-PP 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": "KRE52", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE52-PP", "KRE52-PP" ], "locale_variants": {} }, { "sku": "KRV52-PP", "brand": "FAG", "manufacturer_designation": "KRV52-PP", "series": "krv-series", "type": "cam_follower", "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": 22.3, "static_load_kN": 48.5, "fatigue_load_limit_kN": 6.8, "limiting_speed_rpm": 1300, "max_rpm": 1300, "weight_g": 463, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 22.3 kN and C0 48.5 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.46 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 6.8 kN at 20 mm stud, equivalent to 1.11 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.34 kN per millimetre of rolling-element complement within the 66 mm overall stud length mass is 463 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 C 22.3 kN, C0 48.5 kN and Cur 6.8 kN are the cam-contact ratings; the limiting speed is 1,300 r/min with no reference speed published Reading KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 66 mm overall stud length Reading -PP: rubbing seals at each face of the 52 mm outer ring; they protect the rolling-element pack in abrasive track environments at the cost of a small drag torque. 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 22.3 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 463 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 48.5 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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": [ "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 KRV52-PP?", "a": "The KRV52-PP is a KRV full-complement stud-type cam follower with 52 mm outside diameter, 20 mm stud diameter and 66 mm overall length, envelope 20×52×66 mm. Mass is 463 g." }, { "q": "What does the KRV52-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV52-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 20×52×66 mm and the catalogue ratings are C 22.3 kN, C0 48.5 kN, Cur 6.8 kN." }, { "q": "What is the load capacity of the KRV52-PP?", "a": "The basic dynamic load rating C is 22.3 kN and the basic static load rating C0 is 48.5 kN; the fatigue load limit Cur is 6.8 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 KRV52-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": "How is a stud-type roller like the KRV52-PP 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": "KRV52", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV52-PP", "KRV52-PP" ], "locale_variants": {} }, { "sku": "KR62-PP", "brand": "FAG", "manufacturer_designation": "KR62-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 24, "D_mm": 62, "B_mm": 80, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 26, "static_load_kN": 48.5, "fatigue_load_limit_kN": 7, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 26 kN and C0 48.5 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.54 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 kN at 24 mm stud, equivalent to 1.08 kN of dynamic rating per millimetre — the limiting speed is 1,900 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 0.33 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 770 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 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 crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately C 26 kN, C0 48.5 kN and Cur 7 kN are the cam-contact ratings; the limiting speed is 1,900 r/min with no reference speed published The PP seals make this a maintenance-free unit: the 26 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. Typical applications include linear rail and profile track guidance, automatic assembly machine carriages and glass and ceramic line conveyors, where the 62 mm track diameter and 26 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 770 g mass keeps follower kinetics light. Designers also specify it for glass and ceramic line conveyors, relying on the 80 mm stud length and the published 48.5 kN static rating. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement. Full-complement followers trade speed for static capacity — apply the lower limiting speed and expect higher drive torque than a caged KR.", "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": [ "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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." ], "faq": [ { "q": "What are the dimensions of the KR62-PP?", "a": "The KR62-PP is a KR stud-type cam follower with needle roller and cage assembly with 62 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×62×80 mm. Mass is 770 g." }, { "q": "What does the KR62-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR62-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×62×80 mm and the catalogue ratings are C 26 kN, C0 48.5 kN, Cur 7 kN." }, { "q": "What is the load capacity of the KR62-PP?", "a": "The basic dynamic load rating C is 26 kN and the basic static load rating C0 is 48.5 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 KR62-PP?", "a": "HR1 lists a limiting speed of 1,900 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": "How is a stud-type roller like the KR62-PP 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": "KR62", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR62-PP", "KR62-PP" ], "locale_variants": {} }, { "sku": "KRE62-PP", "brand": "FAG", "manufacturer_designation": "KRE62-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 24, "D_mm": 62, "B_mm": 80, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 26, "static_load_kN": 48.5, "fatigue_load_limit_kN": 7, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 789, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 26 kN and C0 48.5 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.54 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 kN at 24 mm stud, equivalent to 1.08 kN of dynamic rating per millimetre — the limiting speed is 1,900 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 0.33 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 789 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 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 C 26 kN, C0 48.5 kN and Cur 7 kN are the cam-contact ratings; the limiting speed is 1,900 r/min with no reference speed published -PP protection suits cams and rails that are washed down or run in dust; exceeding the 1,900 r/min speed ceiling overheats the lips rather than just accelerating wear. 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 26 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 789 g mass keeps follower kinetics light. Designers also specify it for conveyor transfer and diverting stations, relying on the 80 mm stud length and the published 48.5 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. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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.", "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 KRE62-PP?", "a": "The KRE62-PP is a KRE stud-type cam follower 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 789 g." }, { "q": "What does the KRE62-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE62-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×62×80 mm and the catalogue ratings are C 26 kN, C0 48.5 kN, Cur 7 kN." }, { "q": "What is the load capacity of the KRE62-PP?", "a": "The basic dynamic load rating C is 26 kN and the basic static load rating C0 is 48.5 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 KRE62-PP?", "a": "HR1 lists a limiting speed of 1,900 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": "How is a stud-type roller like the KRE62-PP 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": "KRE62", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE62-PP", "KRE62-PP" ], "locale_variants": {} }, { "sku": "KRV62-PP", "brand": "FAG", "manufacturer_designation": "KRV62-PP", "series": "krv-series", "type": "cam_follower", "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": 33.5, "static_load_kN": 76, "fatigue_load_limit_kN": 11.4, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 787, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 33.5 kN and C0 76 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.44 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 11.4 kN at 24 mm stud, equivalent to 1.40 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 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.42 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 787 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 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 full complement raises static capacity but lowers the speed ceiling and generates more friction torque — slow, heavily loaded cams are its duty The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 76 kN static rating and skews the outer ring -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 80 mm width. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 62 mm track diameter and 33.5 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 787 g mass keeps follower kinetics light. Designers also specify it for automotive welding jig rollers, relying on the 80 mm stud length and the published 76 kN static rating. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval. 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": [ "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": [ "Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "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 KRV62-PP?", "a": "The KRV62-PP is a KRV full-complement stud-type cam follower with 62 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×62×80 mm. Mass is 787 g." }, { "q": "What does the KRV62-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV62-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×62×80 mm and the catalogue ratings are C 33.5 kN, C0 76 kN, Cur 11.4 kN." }, { "q": "What is the load capacity of the KRV62-PP?", "a": "The basic dynamic load rating C is 33.5 kN and the basic static load rating C0 is 76 kN; the fatigue load limit Cur is 11.4 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 KRV62-PP?", "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": "How is a stud-type roller like the KRV62-PP 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": "KRV62", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV62-PP", "KRV62-PP" ], "locale_variants": {} }, { "sku": "KR72-PP", "brand": "FAG", "manufacturer_designation": "KR72-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 24, "D_mm": 72, "B_mm": 80, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 28, "static_load_kN": 53, "fatigue_load_limit_kN": 7.3, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 1010, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 28 kN and C0 53 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.53 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 7.3 kN at 24 mm stud, equivalent to 1.17 kN of dynamic rating per millimetre — the limiting speed is 1,900 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 0.35 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.01 kg (1010 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 KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 80 mm overall stud length KR is the stud-type cam follower with a needle roller and cage assembly: the 24 mm threaded stud bolts into the bracket and the 72 mm crowned outer ring follows the cam -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 80 mm width. Typical applications include packaging machine timing mechanisms, woodworking machine feed tracks and agricultural and textile cam followers, where the 72 mm track diameter and 28 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 1.01 kg mass is part of the rotor inertia calculation. Designers also specify it for agricultural and textile cam followers, relying on the 80 mm stud length and the published 53 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": [ "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": [ "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 KR72-PP?", "a": "The KR72-PP is a KR stud-type cam follower with needle roller and cage assembly with 72 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×72×80 mm. Mass is 1.01 kg." }, { "q": "What does the KR72-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR72-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×72×80 mm and the catalogue ratings are C 28 kN, C0 53 kN, Cur 7.3 kN." }, { "q": "What is the load capacity of the KR72-PP?", "a": "The basic dynamic load rating C is 28 kN and the basic static load rating C0 is 53 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 KR72-PP?", "a": "HR1 lists a limiting speed of 1,900 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": "How is a stud-type roller like the KR72-PP 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": "KR72", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR72-PP", "KR72-PP" ], "locale_variants": {} }, { "sku": "KRE72-PP", "brand": "FAG", "manufacturer_designation": "KRE72-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 24, "D_mm": 72, "B_mm": 80, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 28, "static_load_kN": 53, "fatigue_load_limit_kN": 7.3, "limiting_speed_rpm": 1900, "max_rpm": 1900, "weight_g": 1038, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 28 kN and C0 53 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.53 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 7.3 kN at 24 mm stud, equivalent to 1.17 kN of dynamic rating per millimetre — the limiting speed is 1,900 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 0.35 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.038 kg (1038 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 The caged pack keeps friction and inertia low — at 1038 g this is the follower for fast indexing drives and high-cycle linkages The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 80 mm width. 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 28 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 1.038 kg mass is part of the rotor inertia calculation. Designers also specify it for cam drives and indexing tables, relying on the 80 mm stud length and the published 53 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": [ "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 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 KRE72-PP?", "a": "The KRE72-PP is a KRE stud-type cam follower 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 1.038 kg." }, { "q": "What does the KRE72-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE72-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×72×80 mm and the catalogue ratings are C 28 kN, C0 53 kN, Cur 7.3 kN." }, { "q": "What is the load capacity of the KRE72-PP?", "a": "The basic dynamic load rating C is 28 kN and the basic static load rating C0 is 53 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 KRE72-PP?", "a": "HR1 lists a limiting speed of 1,900 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": "How is a stud-type roller like the KRE72-PP 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": "KRE72", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE72-PP", "KRE72-PP" ], "locale_variants": {} }, { "sku": "KRV72-PP", "brand": "FAG", "manufacturer_designation": "KRV72-PP", "series": "krv-series", "type": "cam_follower", "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": 36.5, "static_load_kN": 86, "fatigue_load_limit_kN": 12.8, "limiting_speed_rpm": 1100, "max_rpm": 1100, "weight_g": 1027, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 36.5 kN and C0 86 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.42 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 12.8 kN at 24 mm stud, equivalent to 1.52 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 24 mm threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.46 kN per millimetre of rolling-element complement within the 80 mm overall stud length mass is 1.027 kg (1027 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 must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 86 kN static rating and skews the outer ring -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 80 mm width. 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 36.5 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 1.027 kg mass is part of the rotor inertia calculation. Designers also specify it for cam drives and indexing tables, relying on the 80 mm stud length and the published 86 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 80 mm stud unusable.", "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": [ "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 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 KRV72-PP?", "a": "The KRV72-PP is a KRV full-complement stud-type cam follower with 72 mm outside diameter, 24 mm stud diameter and 80 mm overall length, envelope 24×72×80 mm. Mass is 1.027 kg." }, { "q": "What does the KRV72-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV72-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 24×72×80 mm and the catalogue ratings are C 36.5 kN, C0 86 kN, Cur 12.8 kN." }, { "q": "What is the load capacity of the KRV72-PP?", "a": "The basic dynamic load rating C is 36.5 kN and the basic static load rating C0 is 86 kN; the fatigue load limit Cur is 12.8 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 KRV72-PP?", "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": "How is a stud-type roller like the KRV72-PP 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": "KRV72", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV72-PP", "KRV72-PP" ], "locale_variants": {} }, { "sku": "KR80-PP", "brand": "FAG", "manufacturer_designation": "KR80-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 30, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 38.5, "static_load_kN": 78, "fatigue_load_limit_kN": 11.2, "limiting_speed_rpm": 1300, "max_rpm": 1300, "weight_g": 1608, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 38.5 kN and C0 78 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.49 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 11.2 kN at 30 mm stud, equivalent to 1.28 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 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 100 mm overall stud length mass is 1.608 kg (1608 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 KR/KRV/KRE: stud-type needle cam followers with PP lip seals on both sides and a 100 mm overall stud length The PP seals make this a maintenance-free unit: the 38.5 kN C rating is slightly below the open execution because the seal recesses shorten the effective roller complement. 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 38.5 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 1.608 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 78 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": [ "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.", "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 KR80-PP?", "a": "The KR80-PP is a KR stud-type cam follower with needle roller and cage assembly with 80 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×80×100 mm. Mass is 1.608 kg." }, { "q": "What does the KR80-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR80-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×80×100 mm and the catalogue ratings are C 38.5 kN, C0 78 kN, Cur 11.2 kN." }, { "q": "What is the load capacity of the KR80-PP?", "a": "The basic dynamic load rating C is 38.5 kN and the basic static load rating C0 is 78 kN; the fatigue load limit Cur is 11.2 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 KR80-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": "How is a stud-type roller like the KR80-PP 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": "KR80", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR80-PP", "KR80-PP" ], "locale_variants": {} }, { "sku": "KRE80-PP", "brand": "FAG", "manufacturer_designation": "KRE80-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 30, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 38.5, "static_load_kN": 78, "fatigue_load_limit_kN": 11.2, "limiting_speed_rpm": 1300, "max_rpm": 1300, "weight_g": 1665, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 38.5 kN and C0 78 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.49 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 11.2 kN at 30 mm stud, equivalent to 1.28 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 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 100 mm overall stud length mass is 1.665 kg (1665 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 at 30 mm stud shank this size balances the 80 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range C 38.5 kN, C0 78 kN and Cur 11.2 kN are the cam-contact ratings; the limiting speed is 1,300 r/min with no reference speed published The crowned outer-ring profile is the standard form: it distributes edge stress when the cam track is not perfectly parallel, and a cylindrical-profile variant would be ordered separately 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 conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 80 mm track diameter and 38.5 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 1.665 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 78 kN static rating. 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. On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 100 mm stud unusable.", "On eccentric KRE/NUKRE/PWKRE units, re-torque after setting the collar — the adjustment changes the effective stud engagement.", "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 KRE80-PP?", "a": "The KRE80-PP is a KRE stud-type cam follower 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 1.665 kg." }, { "q": "What does the KRE80-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE80-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×80×100 mm and the catalogue ratings are C 38.5 kN, C0 78 kN, Cur 11.2 kN." }, { "q": "What is the load capacity of the KRE80-PP?", "a": "The basic dynamic load rating C is 38.5 kN and the basic static load rating C0 is 78 kN; the fatigue load limit Cur is 11.2 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 KRE80-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": "How is a stud-type roller like the KRE80-PP 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": "KRE80", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE80-PP", "KRE80-PP" ], "locale_variants": {} }, { "sku": "KRV80-PP", "brand": "FAG", "manufacturer_designation": "KRV80-PP", "series": "krv-series", "type": "cam_follower", "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": 48.5, "static_load_kN": 118, "fatigue_load_limit_kN": 17.6, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 1636, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 48.5 kN and C0 118 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.41 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 17.6 kN at 30 mm stud, equivalent to 1.62 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.48 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.636 kg (1636 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 The full complement raises static capacity but lowers the speed ceiling and generates more friction torque — slow, heavily loaded cams are its duty The standard stud axis fixes the roller centre; shimming the bracket faces is the way to adjust track preload -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 100 mm width. Typical applications include conveyor transfer and diverting stations, robotic arm linear axes and automotive welding jig rollers, where the 80 mm track diameter and 48.5 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 1.636 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 118 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": [ "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 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 KRV80-PP?", "a": "The KRV80-PP is a KRV full-complement stud-type cam follower with 80 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×80×100 mm. Mass is 1.636 kg." }, { "q": "What does the KRV80-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV80-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×80×100 mm and the catalogue ratings are C 48.5 kN, C0 118 kN, Cur 17.6 kN." }, { "q": "What is the load capacity of the KRV80-PP?", "a": "The basic dynamic load rating C is 48.5 kN and the basic static load rating C0 is 118 kN; the fatigue load limit Cur is 17.6 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 KRV80-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": "How is a stud-type roller like the KRV80-PP 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": "KRV80", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV80-PP", "KRV80-PP" ], "locale_variants": {} }, { "sku": "KR90-PP", "brand": "FAG", "manufacturer_designation": "KR90-PP", "series": "kr-series", "type": "cam_follower", "d_mm": 30, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 40.5, "static_load_kN": 84, "fatigue_load_limit_kN": 11.9, "limiting_speed_rpm": 1300, "max_rpm": 1300, "weight_g": 1975, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 40.5 kN and C0 84 kN for the KR stud-type cam follower with needle roller and cage assembly; the C/C0 ratio of 0.48 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 11.9 kN at 30 mm stud, equivalent to 1.35 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.41 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 1.975 kg (1975 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 KR is the stud-type cam follower with a needle roller and cage assembly: the 30 mm threaded stud bolts into the bracket and the 90 mm crowned outer ring follows the cam The stud must be fully supported and torqued against a flat bracket face; an under-supported cantilever stud bends under the 84 kN static rating and skews the outer ring 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 90 mm track diameter and 40.5 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 1.975 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 84 kN static rating. 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.", "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": [ "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.", "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 KR90-PP?", "a": "The KR90-PP is a KR stud-type cam follower with needle roller and cage assembly with 90 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×90×100 mm. Mass is 1.975 kg." }, { "q": "What does the KR90-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KR90-PP identifies this KR stud-type cam follower with needle roller and cage assembly in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×90×100 mm and the catalogue ratings are C 40.5 kN, C0 84 kN, Cur 11.9 kN." }, { "q": "What is the load capacity of the KR90-PP?", "a": "The basic dynamic load rating C is 40.5 kN and the basic static load rating C0 is 84 kN; the fatigue load limit Cur is 11.9 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 KR90-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": "How is a stud-type roller like the KR90-PP 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": "KR90", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KR90-PP", "KR90-PP" ], "locale_variants": {} }, { "sku": "KRE90-PP", "brand": "FAG", "manufacturer_designation": "KRE90-PP", "series": "kre-series", "type": "cam_follower", "d_mm": 30, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "2RS", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 40.5, "static_load_kN": 84, "fatigue_load_limit_kN": 11.9, "limiting_speed_rpm": 1300, "max_rpm": 1300, "weight_g": 2032, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 40.5 kN and C0 84 kN for the KRE stud-type cam follower with eccentric locking collar; the C/C0 ratio of 0.48 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 11.9 kN at 30 mm stud, equivalent to 1.35 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.41 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 2.032 kg (2032 g), or 0.23 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 KR is the stud-type cam follower with a needle roller and cage assembly: the 30 mm threaded stud bolts into the bracket and the 90 mm crowned outer ring follows the cam C 40.5 kN, C0 84 kN and Cur 11.9 kN are the cam-contact ratings; the limiting speed is 1,300 r/min with no reference speed published -PP means sealed both sides with elastomer lips — the roller is greased for life and needs no relubrication fitting in the 100 mm width. Typical applications include automotive welding jig rollers, conveyor transfer and diverting stations and automatic assembly machine carriages, where the 90 mm track diameter and 40.5 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 2.032 kg mass is part of the rotor inertia calculation. Designers also specify it for automatic assembly machine carriages, relying on the 100 mm stud length and the published 84 kN static rating. 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. 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": [ "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 100 mm stud unusable.", "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.", "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 KRE90-PP?", "a": "The KRE90-PP is a KRE stud-type cam follower 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 2.032 kg." }, { "q": "What does the KRE90-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRE90-PP identifies this KRE stud-type cam follower with eccentric locking collar in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×90×100 mm and the catalogue ratings are C 40.5 kN, C0 84 kN, Cur 11.9 kN." }, { "q": "What is the load capacity of the KRE90-PP?", "a": "The basic dynamic load rating C is 40.5 kN and the basic static load rating C0 is 84 kN; the fatigue load limit Cur is 11.9 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 KRE90-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": "How is a stud-type roller like the KRE90-PP 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": "KRE90", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRE90-PP", "KRE90-PP" ], "locale_variants": {} }, { "sku": "KRV90-PP", "brand": "FAG", "manufacturer_designation": "KRV90-PP", "series": "krv-series", "type": "cam_follower", "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": 52, "static_load_kN": 130, "fatigue_load_limit_kN": 19.4, "limiting_speed_rpm": 850, "max_rpm": 850, "weight_g": 2003, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "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 52 kN and C0 130 kN for the KRV full-complement stud-type cam follower; the C/C0 ratio of 0.40 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 19.4 kN at 30 mm stud, equivalent to 1.73 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 threaded stud clamps directly into the machine bracket; over the roller running width the dynamic rating works out to 0.52 kN per millimetre of rolling-element complement within the 100 mm overall stud length mass is 2.003 kg (2003 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 The full complement raises static capacity but lowers the speed ceiling and generates more friction torque — slow, heavily loaded cams are its duty KRV is the full-complement stud-type cam follower: a cageless needle pack maximises C0 130 kN inside the 90 mm outer ring on the 30 mm stud 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 printing press sheet-transfer grippers, glass and ceramic line conveyors and cam drives and indexing tables, where the 90 mm track diameter and 52 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 2.003 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 130 kN static rating. 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. Sealed PP/2RS followers are life-lubricated; open KR/NUKR executions need the stud greaseway serviced on a fixed interval.", "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 100 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 KRV90-PP?", "a": "The KRV90-PP is a KRV full-complement stud-type cam follower with 90 mm outside diameter, 30 mm stud diameter and 100 mm overall length, envelope 30×90×100 mm. Mass is 2.003 kg." }, { "q": "What does the KRV90-PP designation mean in the FAG/INA HR1 catalogue?", "a": "KRV90-PP identifies this KRV full-complement stud-type cam follower in the Schaeffler HR1 rolling bearings catalogue. The envelope is 30×90×100 mm and the catalogue ratings are C 52 kN, C0 130 kN, Cur 19.4 kN." }, { "q": "What is the load capacity of the KRV90-PP?", "a": "The basic dynamic load rating C is 52 kN and the basic static load rating C0 is 130 kN; the fatigue load limit Cur is 19.4 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 KRV90-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": "How is a stud-type roller like the KRV90-PP 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": "KRV90", "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=1457", "catalog_ver": "HR1 2026-09-25", "extracted_at": "2026-09-30", "last_verified": "2026-09-30", "confidence_score": 0.7, "status": "published", "aliases": [ "KRV90-PP", "KRV90-PP" ], "locale_variants": {} }, { "sku": "KR-16", "brand": "SKF", "manufacturer_designation": "KR 16", "series": "KR-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 19, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 16 mm outside diameter runs on the track while the 6 mm stud shank takes the pin or shaft; the 28 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.345 kN at 6 mm stud gives a specific load of 0.52 kN per mm; the limiting speed is 6,000 r/min the 28 mm width carries the load at 0.11 kN per mm of roller complement; section height 5.0 mm between stud and track surface determines the outer-ring bending stiffness mass 19 g over a 16x28 mm envelope works out to 0.042 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 6 mm stud shank 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 KR: cam follower with caged needle roller complement; the stud is threaded for the hexagonal nut and the outer ring profile is the track contact 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 6 mm stud fit standard cam and rail geometries in food processing line track rollers the 16 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 19 g mass is low enough for rapid indexing cycles the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "applications": [ "woodworking machinery feed rollers", "paper mill web guide rollers", "cam mechanisms and indexing drives", "material handling lift and lower tracks" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller" ], "faq": [ { "q": "What are the dimensions of the KR-16?", "a": "KR-16 is a cam follower with needle roller and cage with 16 mm outside diameter, 6 mm stud shank diameter and 28 mm overall width. The stud is 6 mm and the track contact diameter is 16 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 16x6x28 mm envelope and the 6000 r/min limiting speed." }, { "q": "What is the load capacity of KR-16?", "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": "KR", "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": [ "KR-16", "KR 16" ], "locale_variants": {}, "limiting_speed_rpm": 6000, "max_rpm": 6000 }, { "sku": "KR-16-PPA", "brand": "SKF", "manufacturer_designation": "KR 16 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 18, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 16 mm outside diameter runs on the track while the 6 mm stud shank takes the pin or shaft; the 28 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.345 kN at 6 mm stud gives a specific load of 0.52 kN per mm; the limiting speed is 6,000 r/min the 28 mm width carries the load at 0.11 kN per mm of roller complement; section height 5.0 mm between stud and track surface determines the outer-ring bending stiffness mass 18 g over a 16x28 mm envelope works out to 0.040 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 6 mm stud diameter this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms KR is the fundamental stud-type track roller: a single-row needle roller and cage unit pressed onto a threaded stud, offering the highest limiting speed of the cam follower range 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 16 mm track diameter and 6 mm stud fit standard cam and rail geometries in packaging machine timing cams the 16 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 18 g mass is low enough for rapid indexing cycles the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "applications": [ "material handling lift and lower tracks", "textile machine cam drives", "sheet-metal forming press feeds", "agricultural equipment cam followers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage" ], "faq": [ { "q": "What are the dimensions of the KR-16-PPA?", "a": "KR-16-PPA is a cam follower with needle roller and cage with 16 mm outside diameter, 6 mm stud shank diameter and 28 mm overall width. The stud is 6 mm and the track contact diameter is 16 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 16x6x28 mm envelope and the 6000 r/min limiting speed." }, { "q": "What is the load capacity of KR-16-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": "KR", "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": [ "KR-16-PPA", "KR 16 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 6000, "max_rpm": 6000 }, { "sku": "KR-16-PPSKA", "brand": "SKF", "manufacturer_designation": "KR 16 PPSKA", "series": "KR-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 19, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 16 mm outside diameter runs on the track while the 6 mm stud shank takes the pin or shaft; the 28 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.345 kN at 6 mm stud gives a specific load of 0.52 kN per mm; the limiting speed is 6,000 r/min the 28 mm width carries the load at 0.11 kN per mm of roller complement; section height 5.0 mm between stud and track surface determines the outer-ring bending stiffness mass 19 g over a 16x28 mm envelope works out to 0.042 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 6 mm stud diameter this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms the KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 6 mm stud and the 16 mm thick-walled outer ring the PPSKA suffix combines a hex recess and a slot in the stud head — the slot allows tightening with a flat screwdriver when the 6 mm stud is too small for a standard hex key 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 16 mm track diameter and 6 mm stud fit standard cam and rail geometries in textile machine cam drives the 16 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 19 g mass is low enough for rapid indexing cycles the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "applications": [ "woodworking machinery feed rollers", "material handling lift and lower tracks", "cam mechanisms and indexing drives", "sheet-metal forming press feeds" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage" ], "faq": [ { "q": "What are the dimensions of the KR-16-PPSKA?", "a": "KR-16-PPSKA is a cam follower with needle roller and cage with 16 mm outside diameter, 6 mm stud shank diameter and 28 mm overall width. The stud is 6 mm and the track contact diameter is 16 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 16x6x28 mm envelope and the 6000 r/min limiting speed." }, { "q": "What is the load capacity of KR-16-PPSKA?", "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": "KR", "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": [ "KR-16-PPSKA", "KR 16 PPSKA" ], "locale_variants": {}, "limiting_speed_rpm": 6000, "max_rpm": 6000 }, { "sku": "KR-19", "brand": "SKF", "manufacturer_designation": "KR 19", "series": "KR-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 29, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 19 mm outside diameter runs on the track while the 8 mm stud shank takes the pin or shaft; the 32 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.415 kN at 8 mm stud gives a specific load of 0.43 kN per mm; the limiting speed is 5,600 r/min the 32 mm width carries the load at 0.11 kN per mm of roller complement; section height 5.5 mm between stud and track surface determines the outer-ring bending stiffness mass 29 g over a 19x32 mm envelope works out to 0.048 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 8 mm stud diameter this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms reading KR: cam follower with caged needle roller complement; the stud is threaded for the hexagonal nut and the outer ring profile is the track contact 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 8 mm stud fit standard cam and rail geometries in agricultural equipment cam followers the 19 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 29 g mass is low enough for rapid indexing cycles the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "applications": [ "printing press roller followers", "sheet-metal forming press feeds", "automotive welding jig positioners", "conveyor transfer and diverting rollers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers" ], "faq": [ { "q": "What are the dimensions of the KR-19?", "a": "KR-19 is a cam follower with needle roller and cage with 19 mm outside diameter, 8 mm stud shank diameter and 32 mm overall width. The stud is 8 mm and the track contact diameter is 19 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 19x8x32 mm envelope and the 5600 r/min limiting speed." }, { "q": "What is the load capacity of KR-19?", "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": "KR", "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": [ "KR-19", "KR 19" ], "locale_variants": {}, "limiting_speed_rpm": 5600, "max_rpm": 5600 }, { "sku": "KR-19-PPA", "brand": "SKF", "manufacturer_designation": "KR 19 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 29, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 19 mm outside diameter runs on the track while the 8 mm stud shank takes the pin or shaft; the 32 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.415 kN at 8 mm stud gives a specific load of 0.43 kN per mm; the limiting speed is 5,600 r/min the 32 mm width carries the load at 0.11 kN per mm of roller complement; section height 5.5 mm between stud and track surface determines the outer-ring bending stiffness mass 29 g over a 19x32 mm envelope works out to 0.048 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 8 mm stud diameter this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms KR names the basic cam follower: a stud-type track roller with a needle roller and cage assembly; the 8 mm stud shank mounts through a machine bracket and the 19 mm outer ring runs on the cam 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 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 8 mm stud fit standard cam and rail geometries in sheet-metal forming press feeds the 19 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 29 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 the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "applications": [ "automatic assembly machine linkages", "cam mechanisms and indexing drives", "food processing line track rollers", "printing press roller followers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers" ], "faq": [ { "q": "What are the dimensions of the KR-19-PPA?", "a": "KR-19-PPA is a cam follower with needle roller and cage with 19 mm outside diameter, 8 mm stud shank diameter and 32 mm overall width. The stud is 8 mm and the track contact diameter is 19 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 19x8x32 mm envelope and the 5600 r/min limiting speed." }, { "q": "What is the load capacity of KR-19-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": "KR", "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": [ "KR-19-PPA", "KR 19 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 5600, "max_rpm": 5600 }, { "sku": "KR-19-PPSKA", "brand": "SKF", "manufacturer_designation": "KR 19 PPSKA", "series": "KR-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 29, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 19 mm outside diameter runs on the track while the 8 mm stud shank takes the pin or shaft; the 32 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.415 kN at 8 mm stud gives a specific load of 0.43 kN per mm; the limiting speed is 5,600 r/min the 32 mm width carries the load at 0.11 kN per mm of roller complement; section height 5.5 mm between stud and track surface determines the outer-ring bending stiffness mass 29 g over a 19x32 mm envelope works out to 0.048 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 8 mm stud shank 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 KR: cam follower with caged needle roller complement; the stud is threaded for the hexagonal nut and the outer ring profile is the track contact reading PPSKA: hex recess plus slot — the small KR stud end can be driven by either tool 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 8 mm stud fit standard cam and rail geometries in cam mechanisms and indexing drives the 19 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 29 g mass is low enough for rapid indexing cycles the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "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 stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating" ], "faq": [ { "q": "What are the dimensions of the KR-19-PPSKA?", "a": "KR-19-PPSKA is a cam follower with needle roller and cage with 19 mm outside diameter, 8 mm stud shank diameter and 32 mm overall width. The stud is 8 mm and the track contact diameter is 19 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 19x8x32 mm envelope and the 5600 r/min limiting speed." }, { "q": "What is the load capacity of KR-19-PPSKA?", "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": "KR", "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": [ "KR-19-PPSKA", "KR 19 PPSKA" ], "locale_variants": {}, "limiting_speed_rpm": 5600, "max_rpm": 5600 }, { "sku": "KR-22-B", "brand": "SKF", "manufacturer_designation": "KR 22 B", "series": "KR-series", "type": "cam_follower", "d_mm": 10, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.4, "static_load_kN": 5, "fatigue_load_limit_kN": 0.56, "weight_g": 45, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 22 mm outside diameter runs on the track while the 10 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.4 kN and C0 5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 0.56 kN at 10 mm stud gives a specific load of 0.44 kN per mm; the limiting speed is 5,300 r/min the 36 mm width carries the load at 0.12 kN per mm of roller complement; section height 6.0 mm between stud and track surface determines the outer-ring bending stiffness mass 45 g over a 22x36 mm envelope works out to 0.057 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 10 mm stud shank 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 KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 10 mm stud and the 22 mm thick-walled outer ring B marks the double-ended hexagon stud: unlike the single-slot small sizes, this 22 mm follower has a hex socket at each end for wrench access in tight spaces 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 22 mm track diameter and 10 mm stud fit standard cam and rail geometries in linear guide and track systems the 22 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 45 g mass is low enough for rapid indexing cycles the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage 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", "packaging machine timing cams", "agricultural equipment cam followers", "glass processing line conveyors" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller" ], "faq": [ { "q": "What are the dimensions of the KR-22-B?", "a": "KR-22-B is a cam follower with needle roller and cage with 22 mm outside diameter, 10 mm stud shank diameter and 36 mm overall width. The stud is 10 mm and the track contact diameter is 22 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 22x10x36 mm envelope and the 5300 r/min limiting speed." }, { "q": "What is the load capacity of KR-22-B?", "a": "The published basic dynamic load rating C is 4.4 kN and the basic static load rating C0 is 5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KR", "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": [ "KR-22-B", "KR 22 B" ], "locale_variants": {}, "limiting_speed_rpm": 5300, "max_rpm": 5300 }, { "sku": "KR-22-PPA", "brand": "SKF", "manufacturer_designation": "KR 22 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 10, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.4, "static_load_kN": 5, "fatigue_load_limit_kN": 0.56, "weight_g": 43, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 22 mm outside diameter runs on the track while the 10 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.4 kN and C0 5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 0.56 kN at 10 mm stud gives a specific load of 0.44 kN per mm; the limiting speed is 5,300 r/min the 36 mm width carries the load at 0.12 kN per mm of roller complement; section height 6.0 mm between stud and track surface determines the outer-ring bending stiffness mass 43 g over a 22x36 mm envelope works out to 0.054 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 10 mm stud shank 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 KR: cam follower with caged needle roller complement; the stud is threaded for the hexagonal nut and the outer ring profile is the track contact 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 22 mm track diameter and 10 mm stud fit standard cam and rail geometries in agricultural equipment cam followers the 22 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 43 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 the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "applications": [ "printing press roller followers", "sheet-metal forming press feeds", "automotive welding jig positioners", "conveyor transfer and diverting rollers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating" ], "faq": [ { "q": "What are the dimensions of the KR-22-PPA?", "a": "KR-22-PPA is a cam follower with needle roller and cage with 22 mm outside diameter, 10 mm stud shank diameter and 36 mm overall width. The stud is 10 mm and the track contact diameter is 22 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 22x10x36 mm envelope and the 5300 r/min limiting speed." }, { "q": "What is the load capacity of KR-22-PPA?", "a": "The published basic dynamic load rating C is 4.4 kN and the basic static load rating C0 is 5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KR", "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": [ "KR-22-PPA", "KR 22 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 5300, "max_rpm": 5300 }, { "sku": "KR-26-B", "brand": "SKF", "manufacturer_designation": "KR 26 B", "series": "KR-series", "type": "cam_follower", "d_mm": 10, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.84, "static_load_kN": 6, "fatigue_load_limit_kN": 0.655, "weight_g": 59, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 26 mm outside diameter runs on the track while the 10 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.84 kN and C0 6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 0.655 kN at 10 mm stud gives a specific load of 0.48 kN per mm; the limiting speed is 5,300 r/min the 36 mm width carries the load at 0.13 kN per mm of roller complement; section height 8.0 mm between stud and track surface determines the outer-ring bending stiffness mass 59 g over a 26x36 mm envelope works out to 0.063 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 10 mm stud shank 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 KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 10 mm stud and the 26 mm thick-walled outer ring B marks the double-ended hexagon stud: unlike the single-slot small sizes, this 26 mm follower has a hex socket at each end for wrench access in tight spaces 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 26 mm track diameter and 10 mm stud fit standard cam and rail geometries in food processing line track rollers the 26 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 59 g mass is low enough for rapid indexing cycles the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "applications": [ "linear guide and track systems", "paper mill web guide rollers", "robotic arm track guidance", "automatic assembly machine linkages" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller" ], "faq": [ { "q": "What are the dimensions of the KR-26-B?", "a": "KR-26-B is a cam follower with needle roller and cage with 26 mm outside diameter, 10 mm stud shank diameter and 36 mm overall width. The stud is 10 mm and the track contact diameter is 26 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 26x10x36 mm envelope and the 5300 r/min limiting speed." }, { "q": "What is the load capacity of KR-26-B?", "a": "The published basic dynamic load rating C is 4.84 kN and the basic static load rating C0 is 6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KR", "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": [ "KR-26-B", "KR 26 B" ], "locale_variants": {}, "limiting_speed_rpm": 5300, "max_rpm": 5300 }, { "sku": "KR-26-PPA", "brand": "SKF", "manufacturer_designation": "KR 26 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 10, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.84, "static_load_kN": 6, "fatigue_load_limit_kN": 0.655, "weight_g": 57, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 26 mm outside diameter runs on the track while the 10 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.84 kN and C0 6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 0.655 kN at 10 mm stud gives a specific load of 0.48 kN per mm; the limiting speed is 5,300 r/min the 36 mm width carries the load at 0.13 kN per mm of roller complement; section height 8.0 mm between stud and track surface determines the outer-ring bending stiffness mass 57 g over a 26x36 mm envelope works out to 0.061 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty with a 10 mm stud shank 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 KR: cam follower with caged needle roller complement; the stud is threaded for the hexagonal nut and the outer ring profile is the track contact 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 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 26 mm track diameter and 10 mm stud fit standard cam and rail geometries in robotic arm track guidance the 26 mm outer ring provides the rolling contact while the threaded stud 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 the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "applications": [ "cam mechanisms and indexing drives", "glass processing line conveyors", "material handling lift and lower tracks", "sheet-metal forming press feeds" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating" ], "faq": [ { "q": "What are the dimensions of the KR-26-PPA?", "a": "KR-26-PPA is a cam follower with needle roller and cage with 26 mm outside diameter, 10 mm stud shank diameter and 36 mm overall width. The stud is 10 mm and the track contact diameter is 26 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 26x10x36 mm envelope and the 5300 r/min limiting speed." }, { "q": "What is the load capacity of KR-26-PPA?", "a": "The published basic dynamic load rating C is 4.84 kN and the basic static load rating C0 is 6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KR", "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": [ "KR-26-PPA", "KR 26 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 5300, "max_rpm": 5300 }, { "sku": "KR-30-B", "brand": "SKF", "manufacturer_designation": "KR 30 B", "series": "KR-series", "type": "cam_follower", "d_mm": 12, "D_mm": 30, "B_mm": 40, "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": 92, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 30 mm outside diameter runs on the track while the 12 mm stud shank takes the pin or shaft; the 40 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.88 kN at 12 mm stud gives a specific load of 0.54 kN per mm; the limiting speed is 4,800 r/min the 40 mm width carries the load at 0.16 kN per mm of roller complement; section height 9.0 mm between stud and track surface determines the outer-ring bending stiffness mass 92 g over a 30x40 mm envelope works out to 0.077 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 12 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the KR designation means the standard cam follower execution — cage-guided needle rollers for low friction, a threaded stud for direct bracket mounting, and a cylindrical outer ring for track contact B on this KR designation indicates a double-ended hexagonal stud — the larger head accommodates a standard hex key for secure tightening 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 30 mm track diameter and 12 mm stud fit standard cam and rail geometries in sheet-metal forming press feeds the 30 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 92 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 the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "applications": [ "automatic assembly machine linkages", "cam mechanisms and indexing drives", "food processing line track rollers", "printing press roller followers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers" ], "faq": [ { "q": "What are the dimensions of the KR-30-B?", "a": "KR-30-B is a cam follower with needle roller and cage with 30 mm outside diameter, 12 mm stud shank diameter and 40 mm overall width. The stud is 12 mm and the track contact diameter is 30 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 30x12x40 mm envelope and the 4800 r/min limiting speed." }, { "q": "What is the load capacity of KR-30-B?", "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": "KR", "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": [ "KR-30-B", "KR 30 B" ], "locale_variants": {}, "limiting_speed_rpm": 4800, "max_rpm": 4800 }, { "sku": "KR-30-PPA", "brand": "SKF", "manufacturer_designation": "KR 30 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 12, "D_mm": 30, "B_mm": 40, "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": 88, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 30 mm outside diameter runs on the track while the 12 mm stud shank takes the pin or shaft; the 40 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 cam follower with needle roller and cage executions fatigue load limit Pu 0.88 kN at 12 mm stud gives a specific load of 0.54 kN per mm; the limiting speed is 4,800 r/min the 40 mm width carries the load at 0.16 kN per mm of roller complement; section height 9.0 mm between stud and track surface determines the outer-ring bending stiffness mass 88 g over a 30x40 mm envelope works out to 0.073 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 12 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 12 mm stud and the 30 mm thick-walled outer ring 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 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 12 mm stud fit standard cam and rail geometries in material handling lift and lower tracks the 30 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 88 g mass is low enough for rapid indexing cycles the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "applications": [ "packaging machine timing cams", "woodworking machinery feed rollers", "glass processing line conveyors", "linear guide and track systems" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating" ], "faq": [ { "q": "What are the dimensions of the KR-30-PPA?", "a": "KR-30-PPA is a cam follower with needle roller and cage with 30 mm outside diameter, 12 mm stud shank diameter and 40 mm overall width. The stud is 12 mm and the track contact diameter is 30 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 30x12x40 mm envelope and the 4800 r/min limiting speed." }, { "q": "What is the load capacity of KR-30-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": "KR", "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": [ "KR-30-PPA", "KR 30 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4800, "max_rpm": 4800 }, { "sku": "KR-32-B", "brand": "SKF", "manufacturer_designation": "KR 32 B", "series": "KR-series", "type": "cam_follower", "d_mm": 12, "D_mm": 32, "B_mm": 40, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 6.71, "static_load_kN": 8.5, "fatigue_load_limit_kN": 0.95, "weight_g": 100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm stud shank takes the pin or shaft; the 40 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.71 kN and C0 8.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.79 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 0.95 kN at 12 mm stud gives a specific load of 0.56 kN per mm; the limiting speed is 4,800 r/min the 40 mm width carries the load at 0.17 kN per mm of roller complement; section height 10.0 mm between stud and track surface determines the outer-ring bending stiffness mass 100 g over a 32x40 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 12 mm stud shank 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 KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 12 mm stud and the 32 mm thick-walled outer ring B marks the double-ended hexagon stud: unlike the single-slot small sizes, this 32 mm follower has a hex socket at each end for wrench access in tight spaces 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 32 mm track diameter and 12 mm stud fit standard cam and rail geometries in cam mechanisms and indexing drives the 32 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 100 g mass is low enough for rapid indexing cycles the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "applications": [ "printing press roller followers", "conveyor transfer and diverting rollers", "automotive welding jig positioners", "woodworking machinery feed rollers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage" ], "faq": [ { "q": "What are the dimensions of the KR-32-B?", "a": "KR-32-B is a cam follower with needle roller and cage with 32 mm outside diameter, 12 mm stud shank diameter and 40 mm overall width. The stud is 12 mm and the track contact diameter is 32 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 32x12x40 mm envelope and the 4800 r/min limiting speed." }, { "q": "What is the load capacity of KR-32-B?", "a": "The published basic dynamic load rating C is 6.71 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": "KR", "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": [ "KR-32-B", "KR 32 B" ], "locale_variants": {}, "limiting_speed_rpm": 4800, "max_rpm": 4800 }, { "sku": "KR-32-PPA", "brand": "SKF", "manufacturer_designation": "KR 32 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 12, "D_mm": 32, "B_mm": 40, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 6.71, "static_load_kN": 8.5, "fatigue_load_limit_kN": 0.95, "weight_g": 98, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm stud shank takes the pin or shaft; the 40 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.71 kN and C0 8.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.79 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 0.95 kN at 12 mm stud gives a specific load of 0.56 kN per mm; the limiting speed is 4,800 r/min the 40 mm width carries the load at 0.17 kN per mm of roller complement; section height 10.0 mm between stud and track surface determines the outer-ring bending stiffness mass 98 g over a 32x40 mm envelope works out to 0.077 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 12 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers KR is the fundamental stud-type track roller: a single-row needle roller and cage unit pressed onto a threaded stud, offering the highest limiting speed of the cam follower range 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 stud fit standard cam and rail geometries in food processing line track rollers the 32 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 98 g mass is low enough for rapid indexing cycles the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "applications": [ "food processing line track rollers", "paper mill web guide rollers", "printing press roller followers", "automotive welding jig positioners" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage" ], "faq": [ { "q": "What are the dimensions of the KR-32-PPA?", "a": "KR-32-PPA is a cam follower with needle roller and cage with 32 mm outside diameter, 12 mm stud shank diameter and 40 mm overall width. The stud is 12 mm and the track contact diameter is 32 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 32x12x40 mm envelope and the 4800 r/min limiting speed." }, { "q": "What is the load capacity of KR-32-PPA?", "a": "The published basic dynamic load rating C is 6.71 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": "KR", "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": [ "KR-32-PPA", "KR 32 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4800, "max_rpm": 4800 }, { "sku": "KR-35-B", "brand": "SKF", "manufacturer_designation": "KR 35 B", "series": "KR-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 170, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 35 mm outside diameter runs on the track while the 16 mm stud shank takes the pin or shaft; the 52 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 cam follower with needle roller and cage executions fatigue load limit Pu 1.56 kN at 16 mm stud gives a specific load of 0.59 kN per mm; the limiting speed is 4,000 r/min the 52 mm width carries the load at 0.18 kN per mm of roller complement; section height 9.5 mm between stud and track surface determines the outer-ring bending stiffness mass 170 g over a 35x52 mm envelope works out to 0.093 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 16 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the KR designation means the standard cam follower execution — cage-guided needle rollers for low friction, a threaded stud for direct bracket mounting, and a cylindrical outer ring for track contact B on this KR designation indicates a double-ended hexagonal stud — the larger head accommodates a standard hex key for secure tightening 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 35 mm track diameter and 16 mm stud fit standard cam and rail geometries in woodworking machinery feed rollers the 35 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 170 g mass is low enough for rapid indexing cycles the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "applications": [ "linear guide and track systems", "automotive welding jig positioners", "robotic arm track guidance", "paper mill web guide rollers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "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 KR-35-B?", "a": "KR-35-B is a cam follower with needle roller and cage with 35 mm outside diameter, 16 mm stud shank diameter and 52 mm overall width. The stud is 16 mm and the track contact diameter is 35 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 35x16x52 mm envelope and the 4000 r/min limiting speed." }, { "q": "What is the load capacity of KR-35-B?", "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": "KR", "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": [ "KR-35-B", "KR 35 B" ], "locale_variants": {}, "limiting_speed_rpm": 4000, "max_rpm": 4000 }, { "sku": "KR-35-PPA", "brand": "SKF", "manufacturer_designation": "KR 35 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 160, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 35 mm outside diameter runs on the track while the 16 mm stud shank takes the pin or shaft; the 52 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 cam follower with needle roller and cage executions fatigue load limit Pu 1.56 kN at 16 mm stud gives a specific load of 0.59 kN per mm; the limiting speed is 4,000 r/min the 52 mm width carries the load at 0.18 kN per mm of roller complement; section height 9.5 mm between stud and track surface determines the outer-ring bending stiffness mass 160 g over a 35x52 mm envelope works out to 0.088 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 16 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 16 mm stud and the 35 mm thick-walled outer ring 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 16 mm stud fit standard cam and rail geometries in printing press roller followers the 35 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 160 g mass is low enough for rapid indexing cycles the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "applications": [ "cam mechanisms and indexing drives", "automatic assembly machine linkages", "material handling lift and lower tracks", "sheet-metal forming press feeds" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers" ], "faq": [ { "q": "What are the dimensions of the KR-35-PPA?", "a": "KR-35-PPA is a cam follower with needle roller and cage with 35 mm outside diameter, 16 mm stud shank diameter and 52 mm overall width. The stud is 16 mm and the track contact diameter is 35 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 35x16x52 mm envelope and the 4000 r/min limiting speed." }, { "q": "What is the load capacity of KR-35-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": "KR", "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": [ "KR-35-PPA", "KR 35 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4000, "max_rpm": 4000 }, { "sku": "KR-40-B", "brand": "SKF", "manufacturer_designation": "KR 40 B", "series": "KR-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 40 mm outside diameter runs on the track while the 18 mm stud shank takes the pin or shaft; the 58 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 cam follower with needle roller and cage executions fatigue load limit Pu 1.73 kN at 18 mm stud gives a specific load of 0.58 kN per mm; the limiting speed is 3,400 r/min the 58 mm width carries the load at 0.18 kN per mm of roller complement; section height 11.0 mm between stud and track surface determines the outer-ring bending stiffness mass 250 g over a 40x58 mm envelope works out to 0.108 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 18 mm stud shank 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 KR names the basic cam follower: a stud-type track roller with a needle roller and cage assembly; the 18 mm stud shank mounts through a machine bracket and the 40 mm outer ring runs on the cam the B suffix on this KR size means hexagonal recesses at BOTH ends of the 18 mm stud — the follower can be held from either end during tightening 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 18 mm stud fit standard cam and rail geometries in woodworking machinery feed rollers the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 250 g mass is low enough for rapid indexing cycles the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "applications": [ "food processing line track rollers", "automotive welding jig positioners", "printing press roller followers", "conveyor transfer and diverting rollers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller" ], "faq": [ { "q": "What are the dimensions of the KR-40-B?", "a": "KR-40-B is a cam follower with needle roller and cage with 40 mm outside diameter, 18 mm stud shank diameter and 58 mm overall width. The stud is 18 mm and the track contact diameter is 40 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 40x18x58 mm envelope and the 3400 r/min limiting speed." }, { "q": "What is the load capacity of KR-40-B?", "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": "KR", "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": [ "KR-40-B", "KR 40 B" ], "locale_variants": {}, "limiting_speed_rpm": 3400, "max_rpm": 3400 }, { "sku": "KR-40-PPA", "brand": "SKF", "manufacturer_designation": "KR 40 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 240, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 40 mm outside diameter runs on the track while the 18 mm stud shank takes the pin or shaft; the 58 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 cam follower with needle roller and cage executions fatigue load limit Pu 1.73 kN at 18 mm stud gives a specific load of 0.58 kN per mm; the limiting speed is 3,400 r/min the 58 mm width carries the load at 0.18 kN per mm of roller complement; section height 11.0 mm between stud and track surface determines the outer-ring bending stiffness mass 240 g over a 40x58 mm envelope works out to 0.103 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 18 mm stud shank 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 KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 18 mm stud and the 40 mm thick-walled outer ring 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 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 18 mm stud fit standard cam and rail geometries in printing press roller followers the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 240 g mass is low enough for rapid indexing cycles the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "applications": [ "agricultural equipment cam followers", "automatic assembly machine linkages", "packaging machine timing cams", "glass processing line conveyors" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage" ], "faq": [ { "q": "What are the dimensions of the KR-40-PPA?", "a": "KR-40-PPA is a cam follower with needle roller and cage with 40 mm outside diameter, 18 mm stud shank diameter and 58 mm overall width. The stud is 18 mm and the track contact diameter is 40 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 40x18x58 mm envelope and the 3400 r/min limiting speed." }, { "q": "What is the load capacity of KR-40-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": "KR", "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": [ "KR-40-PPA", "KR 40 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3400, "max_rpm": 3400 }, { "sku": "KR-47-PPA", "brand": "SKF", "manufacturer_designation": "KR 47 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 47, "B_mm": 66, "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": 380, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm stud shank takes the pin or shaft; the 66 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 cam follower with needle roller and cage executions fatigue load limit Pu 2.9 kN at 20 mm stud gives a specific load of 0.73 kN per mm; the limiting speed is 3,000 r/min the 66 mm width carries the load at 0.22 kN per mm of roller complement; section height 13.5 mm between stud and track surface determines the outer-ring bending stiffness mass 380 g over a 47x66 mm envelope works out to 0.123 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm stud shank 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 KR designation means the standard cam follower execution — cage-guided needle rollers for low friction, a threaded stud for direct bracket mounting, and a cylindrical outer ring for track contact 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 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 47 mm track diameter and 20 mm stud fit standard cam and rail geometries in food processing line track rollers the 47 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 380 g mass is low enough for rapid indexing cycles the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "applications": [ "linear guide and track systems", "paper mill web guide rollers", "robotic arm track guidance", "automatic assembly machine linkages" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers" ], "faq": [ { "q": "What are the dimensions of the KR-47-PPA?", "a": "KR-47-PPA is a cam follower with needle roller and cage with 47 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 47 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 47x20x66 mm envelope and the 3000 r/min limiting speed." }, { "q": "What is the load capacity of KR-47-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": "KR", "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": [ "KR-47-PPA", "KR 47 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3000, "max_rpm": 3000 }, { "sku": "KR-52-PPA", "brand": "SKF", "manufacturer_designation": "KR 52 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 52, "B_mm": 66, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 15.7, "static_load_kN": 27, "fatigue_load_limit_kN": 3.2, "weight_g": 450, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 52 mm outside diameter runs on the track while the 20 mm stud shank takes the pin or shaft; the 66 mm overall width spreads the Hertzian contact over the outer ring published ratings C 15.7 kN and C0 27 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.58 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 3.2 kN at 20 mm stud gives a specific load of 0.78 kN per mm; the limiting speed is 3,000 r/min the 66 mm width carries the load at 0.24 kN per mm of roller complement; section height 16.0 mm between stud and track surface determines the outer-ring bending stiffness mass 450 g over a 52x66 mm envelope works out to 0.131 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers KR is the fundamental stud-type track roller: a single-row needle roller and cage unit pressed onto a threaded stud, offering the highest limiting speed of the cam follower range 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 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 52 mm track diameter and 20 mm stud fit standard cam and rail geometries in automotive welding jig positioners the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 450 g mass is low enough for rapid indexing cycles the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "applications": [ "paper mill web guide rollers", "food processing line track rollers", "automatic assembly machine linkages", "printing press roller followers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage" ], "faq": [ { "q": "What are the dimensions of the KR-52-PPA?", "a": "KR-52-PPA is a cam follower with needle roller and cage with 52 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 52 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 52x20x66 mm envelope and the 3000 r/min limiting speed." }, { "q": "What is the load capacity of KR-52-PPA?", "a": "The published basic dynamic load rating C is 15.7 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": "KR", "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": [ "KR-52-PPA", "KR 52 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3000, "max_rpm": 3000 }, { "sku": "KR-62-PPA", "brand": "SKF", "manufacturer_designation": "KR 62 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 62, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 24.6, "static_load_kN": 44, "fatigue_load_limit_kN": 5.5, "weight_g": 770, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 62 mm outside diameter runs on the track while the 24 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 24.6 kN and C0 44 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.56 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 5.5 kN at 24 mm stud gives a specific load of 1.03 kN per mm; the limiting speed is 2,400 r/min the 80 mm width carries the load at 0.31 kN per mm of roller complement; section height 19.0 mm between stud and track surface determines the outer-ring bending stiffness mass 770 g over a 62x80 mm envelope works out to 0.155 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 24 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the KR prefix identifies the standard stud-type cam follower — needle rollers with cage guidance between the 24 mm stud and the 62 mm thick-walled outer ring PPA denotes the crowned running surface: the 62 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks 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 62 mm track diameter and 24 mm stud fit standard cam and rail geometries in robotic arm track guidance the 62 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 770 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 the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "applications": [ "robotic arm track guidance", "glass processing line conveyors", "paper mill web guide rollers", "automatic assembly machine linkages" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller" ], "faq": [ { "q": "What are the dimensions of the KR-62-PPA?", "a": "KR-62-PPA is a cam follower with needle roller and cage with 62 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 62 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 62x24x80 mm envelope and the 2400 r/min limiting speed." }, { "q": "What is the load capacity of KR-62-PPA?", "a": "The published basic dynamic load rating C is 24.6 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": "KR", "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": [ "KR-62-PPA", "KR 62 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 2400, "max_rpm": 2400 }, { "sku": "KR-72-PPA", "brand": "SKF", "manufacturer_designation": "KR 72 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 72, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 26, "static_load_kN": 48, "fatigue_load_limit_kN": 6, "weight_g": 1000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 72 mm outside diameter runs on the track while the 24 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 26 kN and C0 48 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.54 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 6 kN at 24 mm stud gives a specific load of 1.08 kN per mm; the limiting speed is 2,400 r/min the 80 mm width carries the load at 0.33 kN per mm of roller complement; section height 24.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1000 g over a 72x80 mm envelope works out to 0.174 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 24 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers reading KR: cam follower with caged needle roller complement; the stud is threaded for the hexagonal nut and the outer ring profile is the track contact 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 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 24 mm stud fit standard cam and rail geometries in woodworking machinery feed rollers the 72 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1000 g mass is low enough for rapid indexing cycles the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "applications": [ "linear guide and track systems", "automotive welding jig positioners", "robotic arm track guidance", "paper mill web guide rollers" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage" ], "faq": [ { "q": "What are the dimensions of the KR-72-PPA?", "a": "KR-72-PPA is a cam follower with needle roller and cage with 72 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 72 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 72x24x80 mm envelope and the 2400 r/min limiting speed." }, { "q": "What is the load capacity of KR-72-PPA?", "a": "The published basic dynamic load rating C is 26 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": "KR", "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": [ "KR-72-PPA", "KR 72 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 2400, "max_rpm": 2400 }, { "sku": "KR-80-PPA", "brand": "SKF", "manufacturer_designation": "KR 80 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 36.9, "static_load_kN": 72, "fatigue_load_limit_kN": 9, "weight_g": 1600, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 80 mm outside diameter runs on the track while the 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 36.9 kN and C0 72 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.51 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 9 kN at 30 mm stud gives a specific load of 1.23 kN per mm; the limiting speed is 1,800 r/min the 100 mm width carries the load at 0.37 kN per mm of roller complement; section height 25.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1600 g over a 80x100 mm envelope works out to 0.200 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 30 mm stud diameter places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the KR designation means the standard cam follower execution — cage-guided needle rollers for low friction, a threaded stud for direct bracket mounting, and a cylindrical outer ring for track contact 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 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 80 mm track diameter and 30 mm stud fit standard cam and rail geometries in cam mechanisms and indexing drives the 80 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1600 g mass is low enough for rapid indexing cycles the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "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 stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers" ], "faq": [ { "q": "What are the dimensions of the KR-80-PPA?", "a": "KR-80-PPA is a cam follower with needle roller and cage with 80 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 80 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 80x30x100 mm envelope and the 1800 r/min limiting speed." }, { "q": "What is the load capacity of KR-80-PPA?", "a": "The published basic dynamic load rating C is 36.9 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": "KR", "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": [ "KR-80-PPA", "KR 80 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1800, "max_rpm": 1800 }, { "sku": "KR-90-PPA", "brand": "SKF", "manufacturer_designation": "KR 90 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 38, "static_load_kN": 76.5, "fatigue_load_limit_kN": 9.5, "weight_g": 2000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 90 mm outside diameter runs on the track while the 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 38 kN and C0 76.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.50 is typical for cam follower with needle roller and cage executions fatigue load limit Pu 9.5 kN at 30 mm stud gives a specific load of 1.27 kN per mm; the limiting speed is 1,800 r/min the 100 mm width carries the load at 0.38 kN per mm of roller complement; section height 30.0 mm between stud and track surface determines the outer-ring bending stiffness mass 2000 g over a 90x100 mm envelope works out to 0.222 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 30 mm stud diameter places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads KR names the basic cam follower: a stud-type track roller with a needle roller and cage assembly; the 30 mm stud shank mounts through a machine bracket and the 90 mm outer ring runs on the cam 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 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 90 mm track diameter and 30 mm stud fit standard cam and rail geometries in food processing line track rollers the 90 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 2000 g mass is low enough for rapid indexing cycles the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway", "applications": [ "food processing line track rollers", "paper mill web guide rollers", "printing press roller followers", "automotive welding jig positioners" ], "failure_modes": [ "the stud shank must be fully supported by the bracket; a cantilevered stud bends under load and misaligns the roller", "the cage-guided needle rollers are not suited to heavy shock — impact loads can crack the cage and release rollers", "the stud thread must be torqued to the catalogue value; under-torque lets the follower rotate and wear the bracket hole", "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "the open design has no integral sealing; in dusty environments contamination enters directly between the needle rollers and the raceway" ], "pitfalls": [ "the single-row needle complement is the lightest cam follower option; do not overload it beyond the printed C rating", "the stud head is relatively small; use a washer under the nut to spread the clamping load and prevent bracket surface damage", "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 KR-90-PPA?", "a": "KR-90-PPA is a cam follower with needle roller and cage with 90 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 90 mm." }, { "q": "What does the KR designation mean?", "a": "The KR prefix identifies this as a cam follower with needle roller and cage. In the SKF catalogue this designation carries the full specification including the 90x30x100 mm envelope and the 1800 r/min limiting speed." }, { "q": "What is the load capacity of KR-90-PPA?", "a": "The published basic dynamic load rating C is 38 kN and the basic static load rating C0 is 76.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KR", "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": [ "KR-90-PPA", "KR 90 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1800, "max_rpm": 1800 }, { "sku": "KRE-16-PPA", "brand": "SKF", "manufacturer_designation": "KRE 16 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 9, "D_mm": 16, "B_mm": 28, "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": 20, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 16 mm outside diameter runs on the track while the 9 mm stud shank takes the pin or shaft; the 28 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 cam follower with eccentric collar executions fatigue load limit Pu 0.345 kN at 9 mm stud gives a specific load of 0.35 kN per mm; the limiting speed is 6,000 r/min the 28 mm width carries the load at 0.11 kN per mm of roller complement; section height 3.5 mm between stud and track surface determines the outer-ring bending stiffness mass 20 g over a 16x28 mm envelope works out to 0.045 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 9 mm stud places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium KRE provides on-machine adjustment: the eccentric collar allows the roller centre to be shifted radially, compensating for track wear or mounting tolerances without re-boring the bracket 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 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 16 mm track diameter and 9 mm stud fit standard cam and rail geometries in printing press roller followers the 16 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 20 g mass is low enough for rapid indexing cycles mark the collar position before disassembly; reassembly without the original setting loses the preload calibration the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "applications": [ "printing press roller followers", "automatic assembly machine linkages", "automotive welding jig positioners", "conveyor transfer and diverting rollers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting" ], "faq": [ { "q": "What are the dimensions of the KRE-16-PPA?", "a": "KRE-16-PPA is a cam follower with eccentric collar with 16 mm outside diameter, 9 mm stud shank diameter and 28 mm overall width. The stud is 9 mm and the track contact diameter is 16 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 16x9x28 mm envelope and the 6000 r/min limiting speed." }, { "q": "What is the load capacity of KRE-16-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": "KRE", "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": [ "KRE-16-PPA", "KRE 16 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 6000, "max_rpm": 6000 }, { "sku": "KRE-19-PPA", "brand": "SKF", "manufacturer_designation": "KRE 19 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 11, "D_mm": 19, "B_mm": 32, "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": 32, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 19 mm outside diameter runs on the track while the 11 mm stud shank takes the pin or shaft; the 32 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 cam follower with eccentric collar executions fatigue load limit Pu 0.415 kN at 11 mm stud gives a specific load of 0.32 kN per mm; the limiting speed is 5,600 r/min the 32 mm width carries the load at 0.11 kN per mm of roller complement; section height 4.0 mm between stud and track surface determines the outer-ring bending stiffness mass 32 g over a 19x32 mm envelope works out to 0.053 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty at 11 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages reading KRE: cam follower with eccentric adjustment collar; the collar seat on the 11 mm stud is offset so a spanner turn re-centres the roller on the cam 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 19 mm track diameter and 11 mm stud fit standard cam and rail geometries in textile machine cam drives the 19 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 32 g mass is low enough for rapid indexing cycles the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "applications": [ "linear guide and track systems", "material handling lift and lower tracks", "robotic arm track guidance", "paper mill web guide rollers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration" ], "faq": [ { "q": "What are the dimensions of the KRE-19-PPA?", "a": "KRE-19-PPA is a cam follower with eccentric collar with 19 mm outside diameter, 11 mm stud shank diameter and 32 mm overall width. The stud is 11 mm and the track contact diameter is 19 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 19x11x32 mm envelope and the 5600 r/min limiting speed." }, { "q": "What is the load capacity of KRE-19-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": "KRE", "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": [ "KRE-19-PPA", "KRE 19 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 5600, "max_rpm": 5600 }, { "sku": "KRE-22-PPA", "brand": "SKF", "manufacturer_designation": "KRE 22 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 13, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.4, "static_load_kN": 5, "fatigue_load_limit_kN": 0.56, "weight_g": 47, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 22 mm outside diameter runs on the track while the 13 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.4 kN and C0 5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.88 is typical for cam follower with eccentric collar executions fatigue load limit Pu 0.56 kN at 13 mm stud gives a specific load of 0.34 kN per mm; the limiting speed is 5,300 r/min the 36 mm width carries the load at 0.12 kN per mm of roller complement; section height 4.5 mm between stud and track surface determines the outer-ring bending stiffness mass 47 g over a 22x36 mm envelope works out to 0.059 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 13 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the KRE designation adds an eccentric collar to the KR stud — rotating the collar shifts the 22 mm outer ring radially, letting the builder take up track clearance PPA denotes the crowned running surface: the 22 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks 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 22 mm track diameter and 13 mm stud fit standard cam and rail geometries in packaging machine timing cams the 22 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 47 g mass is low enough for rapid indexing cycles the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "applications": [ "material handling lift and lower tracks", "textile machine cam drives", "sheet-metal forming press feeds", "agricultural equipment cam followers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm" ], "faq": [ { "q": "What are the dimensions of the KRE-22-PPA?", "a": "KRE-22-PPA is a cam follower with eccentric collar with 22 mm outside diameter, 13 mm stud shank diameter and 36 mm overall width. The stud is 13 mm and the track contact diameter is 22 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 22x13x36 mm envelope and the 5300 r/min limiting speed." }, { "q": "What is the load capacity of KRE-22-PPA?", "a": "The published basic dynamic load rating C is 4.4 kN and the basic static load rating C0 is 5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRE", "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": [ "KRE-22-PPA", "KRE 22 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 5300, "max_rpm": 5300 }, { "sku": "KRE-26-PPA", "brand": "SKF", "manufacturer_designation": "KRE 26 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 13, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 4.84, "static_load_kN": 6, "fatigue_load_limit_kN": 0.655, "weight_g": 62, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 26 mm outside diameter runs on the track while the 13 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 4.84 kN and C0 6 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.81 is typical for cam follower with eccentric collar executions fatigue load limit Pu 0.655 kN at 13 mm stud gives a specific load of 0.37 kN per mm; the limiting speed is 5,300 r/min the 36 mm width carries the load at 0.13 kN per mm of roller complement; section height 6.5 mm between stud and track surface determines the outer-ring bending stiffness mass 62 g over a 26x36 mm envelope works out to 0.066 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 13 mm stud shank 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 KRE prefix marks the adjustable cam follower — the eccentric collar on the stud gives a quick, reversible way to set preload or correct alignment during assembly the PPA variant has a crowned track surface: the 26 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration 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 26 mm track diameter and 13 mm stud fit standard cam and rail geometries in paper mill web guide rollers the 26 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 62 g mass is low enough for rapid indexing cycles do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "applications": [ "automotive welding jig positioners", "linear guide and track systems", "conveyor transfer and diverting rollers", "woodworking machinery feed rollers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting" ], "faq": [ { "q": "What are the dimensions of the KRE-26-PPA?", "a": "KRE-26-PPA is a cam follower with eccentric collar with 26 mm outside diameter, 13 mm stud shank diameter and 36 mm overall width. The stud is 13 mm and the track contact diameter is 26 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 26x13x36 mm envelope and the 5300 r/min limiting speed." }, { "q": "What is the load capacity of KRE-26-PPA?", "a": "The published basic dynamic load rating C is 4.84 kN and the basic static load rating C0 is 6 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRE", "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": [ "KRE-26-PPA", "KRE 26 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 5300, "max_rpm": 5300 }, { "sku": "KRE-30-PPA", "brand": "SKF", "manufacturer_designation": "KRE 30 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 15, "D_mm": 30, "B_mm": 40, "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": 93, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 30 mm outside diameter runs on the track while the 15 mm stud shank takes the pin or shaft; the 40 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 cam follower with eccentric collar executions fatigue load limit Pu 0.88 kN at 15 mm stud gives a specific load of 0.43 kN per mm; the limiting speed is 4,800 r/min the 40 mm width carries the load at 0.16 kN per mm of roller complement; section height 7.5 mm between stud and track surface determines the outer-ring bending stiffness mass 93 g over a 30x40 mm envelope works out to 0.077 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 15 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the KRE designation adds an eccentric collar to the KR stud — rotating the collar shifts the 30 mm outer ring radially, letting the builder take up track clearance 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 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 30 mm track diameter and 15 mm stud fit standard cam and rail geometries in agricultural equipment cam followers the 30 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 93 g mass is low enough for rapid indexing cycles mark the collar position before disassembly; reassembly without the original setting loses the preload calibration the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "applications": [ "printing press roller followers", "sheet-metal forming press feeds", "automotive welding jig positioners", "conveyor transfer and diverting rollers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting" ], "faq": [ { "q": "What are the dimensions of the KRE-30-PPA?", "a": "KRE-30-PPA is a cam follower with eccentric collar with 30 mm outside diameter, 15 mm stud shank diameter and 40 mm overall width. The stud is 15 mm and the track contact diameter is 30 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 30x15x40 mm envelope and the 4800 r/min limiting speed." }, { "q": "What is the load capacity of KRE-30-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": "KRE", "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": [ "KRE-30-PPA", "KRE 30 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4800, "max_rpm": 4800 }, { "sku": "KRE-32-PPA", "brand": "SKF", "manufacturer_designation": "KRE 32 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 15, "D_mm": 32, "B_mm": 40, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 6.71, "static_load_kN": 8.5, "fatigue_load_limit_kN": 0.95, "weight_g": 100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 32 mm outside diameter runs on the track while the 15 mm stud shank takes the pin or shaft; the 40 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.71 kN and C0 8.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.79 is typical for cam follower with eccentric collar executions fatigue load limit Pu 0.95 kN at 15 mm stud gives a specific load of 0.45 kN per mm; the limiting speed is 4,800 r/min the 40 mm width carries the load at 0.17 kN per mm of roller complement; section height 8.5 mm between stud and track surface determines the outer-ring bending stiffness mass 100 g over a 32x40 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 at 15 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages KRE provides on-machine adjustment: the eccentric collar allows the roller centre to be shifted radially, compensating for track wear or mounting tolerances without re-boring the bracket 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 32 mm track diameter and 15 mm stud fit standard cam and rail geometries in glass processing line conveyors the 32 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 100 g mass is low enough for rapid indexing cycles the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "applications": [ "automatic assembly machine linkages", "agricultural equipment cam followers", "food processing line track rollers", "printing press roller followers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "faq": [ { "q": "What are the dimensions of the KRE-32-PPA?", "a": "KRE-32-PPA is a cam follower with eccentric collar with 32 mm outside diameter, 15 mm stud shank diameter and 40 mm overall width. The stud is 15 mm and the track contact diameter is 32 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 32x15x40 mm envelope and the 4800 r/min limiting speed." }, { "q": "What is the load capacity of KRE-32-PPA?", "a": "The published basic dynamic load rating C is 6.71 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": "KRE", "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": [ "KRE-32-PPA", "KRE 32 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4800, "max_rpm": 4800 }, { "sku": "KRE-35-PPA", "brand": "SKF", "manufacturer_designation": "KRE 35 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 35, "B_mm": 52, "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": 180, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 35 mm outside diameter runs on the track while the 20 mm stud shank takes the pin or shaft; the 52 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 cam follower with eccentric collar executions fatigue load limit Pu 1.56 kN at 20 mm stud gives a specific load of 0.48 kN per mm; the limiting speed is 4,000 r/min the 52 mm width carries the load at 0.18 kN per mm of roller complement; section height 7.5 mm between stud and track surface determines the outer-ring bending stiffness mass 180 g over a 35x52 mm envelope works out to 0.099 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm stud shank 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 KRE: cam follower with eccentric adjustment collar; the collar seat on the 20 mm stud is offset so a spanner turn re-centres the roller on the cam 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 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 20 mm stud fit standard cam and rail geometries in paper mill web guide rollers the 35 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 180 g mass is low enough for rapid indexing cycles do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "applications": [ "paper mill web guide rollers", "linear guide and track systems", "automatic assembly machine linkages", "food processing line track rollers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting" ], "faq": [ { "q": "What are the dimensions of the KRE-35-PPA?", "a": "KRE-35-PPA is a cam follower with eccentric collar with 35 mm outside diameter, 20 mm stud shank diameter and 52 mm overall width. The stud is 20 mm and the track contact diameter is 35 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 35x20x52 mm envelope and the 4000 r/min limiting speed." }, { "q": "What is the load capacity of KRE-35-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": "KRE", "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": [ "KRE-35-PPA", "KRE 35 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4000, "max_rpm": 4000 }, { "sku": "KRE-40-PPA", "brand": "SKF", "manufacturer_designation": "KRE 40 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 22, "D_mm": 40, "B_mm": 58, "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": 260, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 40 mm outside diameter runs on the track while the 22 mm stud shank takes the pin or shaft; the 58 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 cam follower with eccentric collar executions fatigue load limit Pu 1.73 kN at 22 mm stud gives a specific load of 0.48 kN per mm; the limiting speed is 3,400 r/min the 58 mm width carries the load at 0.18 kN per mm of roller complement; section height 9.0 mm between stud and track surface determines the outer-ring bending stiffness mass 260 g over a 40x58 mm envelope works out to 0.112 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 22 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers KRE is the eccentric-collar cam follower: the collar is shrunk onto the stud and turned to adjust the roller centre, giving a preload or alignment correction without machining the bracket 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 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 40 mm track diameter and 22 mm stud fit standard cam and rail geometries in paper mill web guide rollers the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 260 g mass is low enough for rapid indexing cycles the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "applications": [ "automotive welding jig positioners", "linear guide and track systems", "conveyor transfer and diverting rollers", "woodworking machinery feed rollers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm" ], "faq": [ { "q": "What are the dimensions of the KRE-40-PPA?", "a": "KRE-40-PPA is a cam follower with eccentric collar with 40 mm outside diameter, 22 mm stud shank diameter and 58 mm overall width. The stud is 22 mm and the track contact diameter is 40 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 40x22x58 mm envelope and the 3400 r/min limiting speed." }, { "q": "What is the load capacity of KRE-40-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": "KRE", "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": [ "KRE-40-PPA", "KRE 40 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3400, "max_rpm": 3400 }, { "sku": "KRE-47-PPA", "brand": "SKF", "manufacturer_designation": "KRE 47 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 47, "B_mm": 66, "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": 400, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 47 mm outside diameter runs on the track while the 24 mm stud shank takes the pin or shaft; the 66 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 cam follower with eccentric collar executions fatigue load limit Pu 2.9 kN at 24 mm stud gives a specific load of 0.61 kN per mm; the limiting speed is 3,000 r/min the 66 mm width carries the load at 0.22 kN per mm of roller complement; section height 11.5 mm between stud and track surface determines the outer-ring bending stiffness mass 400 g over a 47x66 mm envelope works out to 0.129 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 24 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages reading KRE: cam follower with eccentric adjustment collar; the collar seat on the 24 mm stud is offset so a spanner turn re-centres the roller on the cam 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 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 24 mm stud fit standard cam and rail geometries in glass processing line conveyors the 47 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 400 g mass is low enough for rapid indexing cycles after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "applications": [ "glass processing line conveyors", "agricultural equipment cam followers", "linear guide and track systems", "robotic arm track guidance" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "faq": [ { "q": "What are the dimensions of the KRE-47-PPA?", "a": "KRE-47-PPA is a cam follower with eccentric collar with 47 mm outside diameter, 24 mm stud shank diameter and 66 mm overall width. The stud is 24 mm and the track contact diameter is 47 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 47x24x66 mm envelope and the 3000 r/min limiting speed." }, { "q": "What is the load capacity of KRE-47-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": "KRE", "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": [ "KRE-47-PPA", "KRE 47 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3000, "max_rpm": 3000 }, { "sku": "KRE-52-PPA", "brand": "SKF", "manufacturer_designation": "KRE 52 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 52, "B_mm": 66, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 15.7, "static_load_kN": 27, "fatigue_load_limit_kN": 3.2, "weight_g": 470, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 52 mm outside diameter runs on the track while the 24 mm stud shank takes the pin or shaft; the 66 mm overall width spreads the Hertzian contact over the outer ring published ratings C 15.7 kN and C0 27 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.58 is typical for cam follower with eccentric collar executions fatigue load limit Pu 3.2 kN at 24 mm stud gives a specific load of 0.65 kN per mm; the limiting speed is 3,000 r/min the 66 mm width carries the load at 0.24 kN per mm of roller complement; section height 14.0 mm between stud and track surface determines the outer-ring bending stiffness mass 470 g over a 52x66 mm envelope works out to 0.137 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 24 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages KRE provides on-machine adjustment: the eccentric collar allows the roller centre to be shifted radially, compensating for track wear or mounting tolerances without re-boring the bracket 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 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 52 mm track diameter and 24 mm stud fit standard cam and rail geometries in printing press roller followers the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 470 g mass is low enough for rapid indexing cycles mark the collar position before disassembly; reassembly without the original setting loses the preload calibration the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "applications": [ "agricultural equipment cam followers", "automatic assembly machine linkages", "packaging machine timing cams", "glass processing line conveyors" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting" ], "faq": [ { "q": "What are the dimensions of the KRE-52-PPA?", "a": "KRE-52-PPA is a cam follower with eccentric collar with 52 mm outside diameter, 24 mm stud shank diameter and 66 mm overall width. The stud is 24 mm and the track contact diameter is 52 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 52x24x66 mm envelope and the 3000 r/min limiting speed." }, { "q": "What is the load capacity of KRE-52-PPA?", "a": "The published basic dynamic load rating C is 15.7 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": "KRE", "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": [ "KRE-52-PPA", "KRE 52 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3000, "max_rpm": 3000 }, { "sku": "KRE-62-PPA", "brand": "SKF", "manufacturer_designation": "KRE 62 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 28, "D_mm": 62, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 24.6, "static_load_kN": 44, "fatigue_load_limit_kN": 5.5, "weight_g": 800, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 62 mm outside diameter runs on the track while the 28 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 24.6 kN and C0 44 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.56 is typical for cam follower with eccentric collar executions fatigue load limit Pu 5.5 kN at 28 mm stud gives a specific load of 0.88 kN per mm; the limiting speed is 2,400 r/min the 80 mm width carries the load at 0.31 kN per mm of roller complement; section height 17.0 mm between stud and track surface determines the outer-ring bending stiffness mass 800 g over a 62x80 mm envelope works out to 0.161 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty with a 28 mm stud shank this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity reading KRE: cam follower with eccentric adjustment collar; the collar seat on the 28 mm stud is offset so a spanner turn re-centres the roller on the cam 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 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 28 mm stud fit standard cam and rail geometries in material handling lift and lower tracks the 62 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 800 g mass is low enough for rapid indexing cycles do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "applications": [ "packaging machine timing cams", "woodworking machinery feed rollers", "glass processing line conveyors", "linear guide and track systems" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting" ], "faq": [ { "q": "What are the dimensions of the KRE-62-PPA?", "a": "KRE-62-PPA is a cam follower with eccentric collar with 62 mm outside diameter, 28 mm stud shank diameter and 80 mm overall width. The stud is 28 mm and the track contact diameter is 62 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 62x28x80 mm envelope and the 2400 r/min limiting speed." }, { "q": "What is the load capacity of KRE-62-PPA?", "a": "The published basic dynamic load rating C is 24.6 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": "KRE", "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": [ "KRE-62-PPA", "KRE 62 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 2400, "max_rpm": 2400 }, { "sku": "KRE-72-PPA", "brand": "SKF", "manufacturer_designation": "KRE 72 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 28, "D_mm": 72, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 26, "static_load_kN": 48, "fatigue_load_limit_kN": 6, "weight_g": 1050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 72 mm outside diameter runs on the track while the 28 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 26 kN and C0 48 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.54 is typical for cam follower with eccentric collar executions fatigue load limit Pu 6 kN at 28 mm stud gives a specific load of 0.93 kN per mm; the limiting speed is 2,400 r/min the 80 mm width carries the load at 0.33 kN per mm of roller complement; section height 22.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1050 g over a 72x80 mm envelope works out to 0.182 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 28 mm stud 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 KRE provides on-machine adjustment: the eccentric collar allows the roller centre to be shifted radially, compensating for track wear or mounting tolerances without re-boring the bracket 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 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 28 mm stud fit standard cam and rail geometries in sheet-metal forming press feeds the 72 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1050 g mass is low enough for rapid indexing cycles mark the collar position before disassembly; reassembly without the original setting loses the preload calibration the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "applications": [ "conveyor transfer and diverting rollers", "cam mechanisms and indexing drives", "woodworking machinery feed rollers", "material handling lift and lower tracks" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting" ], "faq": [ { "q": "What are the dimensions of the KRE-72-PPA?", "a": "KRE-72-PPA is a cam follower with eccentric collar with 72 mm outside diameter, 28 mm stud shank diameter and 80 mm overall width. The stud is 28 mm and the track contact diameter is 72 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 72x28x80 mm envelope and the 2400 r/min limiting speed." }, { "q": "What is the load capacity of KRE-72-PPA?", "a": "The published basic dynamic load rating C is 26 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": "KRE", "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": [ "KRE-72-PPA", "KRE 72 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 2400, "max_rpm": 2400 }, { "sku": "KRE-80-PPA", "brand": "SKF", "manufacturer_designation": "KRE 80 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 35, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 36.9, "static_load_kN": 72, "fatigue_load_limit_kN": 9, "weight_g": 1650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 80 mm outside diameter runs on the track while the 35 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 36.9 kN and C0 72 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.51 is typical for cam follower with eccentric collar executions fatigue load limit Pu 9 kN at 35 mm stud gives a specific load of 1.05 kN per mm; the limiting speed is 1,800 r/min the 100 mm width carries the load at 0.37 kN per mm of roller complement; section height 22.5 mm between stud and track surface determines the outer-ring bending stiffness mass 1650 g over a 80x100 mm envelope works out to 0.206 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 35 mm stud diameter places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads KRE provides on-machine adjustment: the eccentric collar allows the roller centre to be shifted radially, compensating for track wear or mounting tolerances without re-boring the bracket 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 80 mm track diameter and 35 mm stud fit standard cam and rail geometries in packaging machine timing cams the 80 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1650 g mass is low enough for rapid indexing cycles do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm mark the collar position before disassembly; reassembly without the original setting loses the preload calibration", "applications": [ "material handling lift and lower tracks", "textile machine cam drives", "sheet-metal forming press feeds", "agricultural equipment cam followers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "faq": [ { "q": "What are the dimensions of the KRE-80-PPA?", "a": "KRE-80-PPA is a cam follower with eccentric collar with 80 mm outside diameter, 35 mm stud shank diameter and 100 mm overall width. The stud is 35 mm and the track contact diameter is 80 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 80x35x100 mm envelope and the 1800 r/min limiting speed." }, { "q": "What is the load capacity of KRE-80-PPA?", "a": "The published basic dynamic load rating C is 36.9 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": "KRE", "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": [ "KRE-80-PPA", "KRE 80 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1800, "max_rpm": 1800 }, { "sku": "KRE-90-PPA", "brand": "SKF", "manufacturer_designation": "KRE 90 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 35, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 38, "static_load_kN": 76.5, "fatigue_load_limit_kN": 9.5, "weight_g": 2050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 90 mm outside diameter runs on the track while the 35 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 38 kN and C0 76.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.50 is typical for cam follower with eccentric collar executions fatigue load limit Pu 9.5 kN at 35 mm stud gives a specific load of 1.09 kN per mm; the limiting speed is 1,800 r/min the 100 mm width carries the load at 0.38 kN per mm of roller complement; section height 27.5 mm between stud and track surface determines the outer-ring bending stiffness mass 2050 g over a 90x100 mm envelope works out to 0.228 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 35 mm stud shank this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity KRE is the eccentric-collar cam follower: the collar is shrunk onto the stud and turned to adjust the roller centre, giving a preload or alignment correction without machining the bracket 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 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 90 mm track diameter and 35 mm stud fit standard cam and rail geometries in automatic assembly machine linkages the 90 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 2050 g mass is low enough for rapid indexing cycles the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "applications": [ "glass processing line conveyors", "robotic arm track guidance", "linear guide and track systems", "paper mill web guide rollers" ], "failure_modes": [ "the eccentric collar is a friction fit on the stud — do not hammer it; use the correct spanner to rotate it to the preload setting", "after adjusting the eccentric collar, re-torque the stud nut; the collar setting changes the stud engagement length", "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm", "mark the collar position before disassembly; reassembly without the original setting loses the preload calibration" ], "pitfalls": [ "the eccentric adjustment range is limited; if the required offset exceeds the collar throw, the bracket must be re-machined", "the eccentric collar is a friction fit — excessive adjustment force can score the stud surface and create a stress concentration", "do not use the eccentric collar to compensate for gross track misalignment; the adjustment range is typically only 0.5–1.0 mm" ], "faq": [ { "q": "What are the dimensions of the KRE-90-PPA?", "a": "KRE-90-PPA is a cam follower with eccentric collar with 90 mm outside diameter, 35 mm stud shank diameter and 100 mm overall width. The stud is 35 mm and the track contact diameter is 90 mm." }, { "q": "What does the KRE designation mean?", "a": "The KRE prefix identifies this as a cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 90x35x100 mm envelope and the 1800 r/min limiting speed." }, { "q": "What is the load capacity of KRE-90-PPA?", "a": "The published basic dynamic load rating C is 38 kN and the basic static load rating C0 is 76.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRE", "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": [ "KRE-90-PPA", "KRE 90 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1800, "max_rpm": 1800 }, { "sku": "KRV-16-PPA", "brand": "SKF", "manufacturer_designation": "KRV 16 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 6, "D_mm": 16, "B_mm": 28, "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": 19, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 16 mm outside diameter runs on the track while the 6 mm stud shank takes the pin or shaft; the 28 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 cam follower with needle rollers executions fatigue load limit Pu 0.72 kN at 6 mm stud gives a specific load of 0.79 kN per mm; the limiting speed is 4,300 r/min the 28 mm width carries the load at 0.17 kN per mm of roller complement; section height 5.0 mm between stud and track surface determines the outer-ring bending stiffness mass 19 g over a 16x28 mm envelope works out to 0.042 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 6 mm stud places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium the KRV execution is the heavy-static counterpart of KR: full complement of needle rollers for maximum load capacity in slow or oscillating cam tracks 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 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 16 mm track diameter and 6 mm stud fit standard cam and rail geometries in material handling lift and lower tracks the 16 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 19 g mass is low enough for rapid indexing cycles the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "applications": [ "packaging machine timing cams", "woodworking machinery feed rollers", "glass processing line conveyors", "linear guide and track systems" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score 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 KRV-16-PPA?", "a": "KRV-16-PPA is a full-complement cam follower with needle rollers with 16 mm outside diameter, 6 mm stud shank diameter and 28 mm overall width. The stud is 6 mm and the track contact diameter is 16 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 16x6x28 mm envelope and the 4300 r/min limiting speed." }, { "q": "What is the load capacity of KRV-16-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": "KRV", "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": [ "KRV-16-PPA", "KRV 16 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4300, "max_rpm": 4300 }, { "sku": "KRV-19-PPA", "brand": "SKF", "manufacturer_designation": "KRV 19 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 8, "D_mm": 19, "B_mm": 32, "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": 31, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 19 mm outside diameter runs on the track while the 8 mm stud shank takes the pin or shaft; the 32 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 cam follower with needle rollers executions fatigue load limit Pu 0.88 kN at 8 mm stud gives a specific load of 0.66 kN per mm; the limiting speed is 4,000 r/min the 32 mm width carries the load at 0.17 kN per mm of roller complement; section height 5.5 mm between stud and track surface determines the outer-ring bending stiffness mass 31 g over a 19x32 mm envelope works out to 0.051 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty with a 8 mm stud shank 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 KRV removes the cage to maximise the needle roller count in the 19 mm envelope; the result is the highest static capacity of the stud-type needle cam followers, with a corresponding drop in permissible speed 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 19 mm track diameter and 8 mm stud fit standard cam and rail geometries in glass processing line conveyors the 19 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 31 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 the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "applications": [ "glass processing line conveyors", "agricultural equipment cam followers", "linear guide and track systems", "robotic arm track guidance" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track" ], "faq": [ { "q": "What are the dimensions of the KRV-19-PPA?", "a": "KRV-19-PPA is a full-complement cam follower with needle rollers with 19 mm outside diameter, 8 mm stud shank diameter and 32 mm overall width. The stud is 8 mm and the track contact diameter is 19 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 19x8x32 mm envelope and the 4000 r/min limiting speed." }, { "q": "What is the load capacity of KRV-19-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": "KRV", "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": [ "KRV-19-PPA", "KRV 19 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 4000, "max_rpm": 4000 }, { "sku": "KRV-22-PPA", "brand": "SKF", "manufacturer_designation": "KRV 22 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 10, "D_mm": 22, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 6.05, "static_load_kN": 9.15, "fatigue_load_limit_kN": 1.04, "weight_g": 45, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 22 mm outside diameter runs on the track while the 10 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.05 kN and C0 9.15 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.66 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 1.04 kN at 10 mm stud gives a specific load of 0.60 kN per mm; the limiting speed is 3,600 r/min the 36 mm width carries the load at 0.17 kN per mm of roller complement; section height 6.0 mm between stud and track surface determines the outer-ring bending stiffness mass 45 g over a 22x36 mm envelope works out to 0.057 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 10 mm stud diameter this sits in the miniature band of the range, where the compact envelope suits tight cam tracks and light-duty indexing mechanisms the KRV prefix means a cageless needle roller cam follower — more rollers, higher static capacity, and a reduced limiting speed for slow, heavily loaded cams PPA denotes the crowned running surface: the 22 mm OD is ground to a large radius rather than straight, reducing edge loading on misaligned cam tracks 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 22 mm track diameter and 10 mm stud fit standard cam and rail geometries in robotic arm track guidance the 22 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 45 g mass is low enough for rapid indexing cycles the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed", "applications": [ "robotic arm track guidance", "glass processing line conveyors", "paper mill web guide rollers", "automatic assembly machine linkages" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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 KRV-22-PPA?", "a": "KRV-22-PPA is a full-complement cam follower with needle rollers with 22 mm outside diameter, 10 mm stud shank diameter and 36 mm overall width. The stud is 10 mm and the track contact diameter is 22 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 22x10x36 mm envelope and the 3600 r/min limiting speed." }, { "q": "What is the load capacity of KRV-22-PPA?", "a": "The published basic dynamic load rating C is 6.05 kN and the basic static load rating C0 is 9.15 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRV", "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": [ "KRV-22-PPA", "KRV 22 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3600, "max_rpm": 3600 }, { "sku": "KRV-26-PPA", "brand": "SKF", "manufacturer_designation": "KRV 26 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 10, "D_mm": 26, "B_mm": 36, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 6.82, "static_load_kN": 11, "fatigue_load_limit_kN": 1.25, "weight_g": 59, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 26 mm outside diameter runs on the track while the 10 mm stud shank takes the pin or shaft; the 36 mm overall width spreads the Hertzian contact over the outer ring published ratings C 6.82 kN and C0 11 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.62 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 1.25 kN at 10 mm stud gives a specific load of 0.68 kN per mm; the limiting speed is 3,600 r/min the 36 mm width carries the load at 0.19 kN per mm of roller complement; section height 8.0 mm between stud and track surface determines the outer-ring bending stiffness mass 59 g over a 26x36 mm envelope works out to 0.063 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 10 mm stud places this in the smallest catalogue tier — typical for instrument cams, small conveyors and precision linear guides where space is at a premium KRV removes the cage to maximise the needle roller count in the 26 mm envelope; the result is the highest static capacity of the stud-type needle cam followers, with a corresponding drop in permissible speed 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 26 mm track diameter and 10 mm stud fit standard cam and rail geometries in agricultural equipment cam followers the 26 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 59 g mass is low enough for rapid indexing cycles the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "applications": [ "agricultural equipment cam followers", "sheet-metal forming press feeds", "packaging machine timing cams", "glass processing line conveyors" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "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 KRV-26-PPA?", "a": "KRV-26-PPA is a full-complement cam follower with needle rollers with 26 mm outside diameter, 10 mm stud shank diameter and 36 mm overall width. The stud is 10 mm and the track contact diameter is 26 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 26x10x36 mm envelope and the 3600 r/min limiting speed." }, { "q": "What is the load capacity of KRV-26-PPA?", "a": "The published basic dynamic load rating C is 6.82 kN and the basic static load rating C0 is 11 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRV", "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": [ "KRV-26-PPA", "KRV 26 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3600, "max_rpm": 3600 }, { "sku": "KRV-30-PPA", "brand": "SKF", "manufacturer_designation": "KRV 30 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 12, "D_mm": 30, "B_mm": 40, "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": 91, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 30 mm outside diameter runs on the track while the 12 mm stud shank takes the pin or shaft; the 40 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 cam follower with needle rollers executions fatigue load limit Pu 1.66 kN at 12 mm stud gives a specific load of 0.75 kN per mm; the limiting speed is 3,200 r/min the 40 mm width carries the load at 0.22 kN per mm of roller complement; section height 9.0 mm between stud and track surface determines the outer-ring bending stiffness mass 91 g over a 30x40 mm envelope works out to 0.076 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 12 mm stud shank 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 KRV denotes the full-complement cam follower: no cage, the maximum number of needle rollers for the 30 mm envelope, raising C0 to 14.6 kN at the cost of the 3200 r/min speed limit 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 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 30 mm track diameter and 12 mm stud fit standard cam and rail geometries in packaging machine timing cams the 30 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 91 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 higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "applications": [ "material handling lift and lower tracks", "textile machine cam drives", "sheet-metal forming press feeds", "agricultural equipment cam followers" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life" ], "faq": [ { "q": "What are the dimensions of the KRV-30-PPA?", "a": "KRV-30-PPA is a full-complement cam follower with needle rollers with 30 mm outside diameter, 12 mm stud shank diameter and 40 mm overall width. The stud is 12 mm and the track contact diameter is 30 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 30x12x40 mm envelope and the 3200 r/min limiting speed." }, { "q": "What is the load capacity of KRV-30-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": "KRV", "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": [ "KRV-30-PPA", "KRV 30 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3200, "max_rpm": 3200 }, { "sku": "KRV-32-PPA", "brand": "SKF", "manufacturer_designation": "KRV 32 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 12, "D_mm": 32, "B_mm": 40, "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": 100, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 32 mm outside diameter runs on the track while the 12 mm stud shank takes the pin or shaft; the 40 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 cam follower with needle rollers executions fatigue load limit Pu 1.76 kN at 12 mm stud gives a specific load of 0.78 kN per mm; the limiting speed is 3,200 r/min the 40 mm width carries the load at 0.23 kN per mm of roller complement; section height 10.0 mm between stud and track surface determines the outer-ring bending stiffness mass 100 g over a 32x40 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 at 12 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages KRV denotes the full-complement cam follower: no cage, the maximum number of needle rollers for the 32 mm envelope, raising C0 to 15.3 kN at the cost of the 3200 r/min speed limit 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 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 32 mm track diameter and 12 mm stud fit standard cam and rail geometries in woodworking machinery feed rollers the 32 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 100 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 higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "applications": [ "linear guide and track systems", "automotive welding jig positioners", "robotic arm track guidance", "paper mill web guide rollers" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 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 KRV-32-PPA?", "a": "KRV-32-PPA is a full-complement cam follower with needle rollers with 32 mm outside diameter, 12 mm stud shank diameter and 40 mm overall width. The stud is 12 mm and the track contact diameter is 32 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 32x12x40 mm envelope and the 3200 r/min limiting speed." }, { "q": "What is the load capacity of KRV-32-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": "KRV", "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": [ "KRV-32-PPA", "KRV 32 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 3200, "max_rpm": 3200 }, { "sku": "KRV-35-PPA", "brand": "SKF", "manufacturer_designation": "KRV 35 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 170, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 35 mm outside diameter runs on the track while the 16 mm stud shank takes the pin or shaft; the 52 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 cam follower with needle rollers executions fatigue load limit Pu 2.7 kN at 16 mm stud gives a specific load of 0.77 kN per mm; the limiting speed is 2,600 r/min the 52 mm width carries the load at 0.24 kN per mm of roller complement; section height 9.5 mm between stud and track surface determines the outer-ring bending stiffness mass 170 g over a 35x52 mm envelope works out to 0.093 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 16 mm stud shank 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 KRV prefix means a cageless needle roller cam follower — more rollers, higher static capacity, and a reduced limiting speed for slow, heavily loaded cams 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 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 16 mm stud fit standard cam and rail geometries in robotic arm track guidance the 35 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 170 g mass is low enough for rapid indexing cycles the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "applications": [ "agricultural equipment cam followers", "glass processing line conveyors", "packaging machine timing cams", "linear guide and track systems" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "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 KRV-35-PPA?", "a": "KRV-35-PPA is a full-complement cam follower with needle rollers with 35 mm outside diameter, 16 mm stud shank diameter and 52 mm overall width. The stud is 16 mm and the track contact diameter is 35 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 35x16x52 mm envelope and the 2600 r/min limiting speed." }, { "q": "What is the load capacity of KRV-35-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": "KRV", "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": [ "KRV-35-PPA", "KRV 35 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 2600, "max_rpm": 2600 }, { "sku": "KRV-40-PPA", "brand": "SKF", "manufacturer_designation": "KRV 40 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 250, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 40 mm outside diameter runs on the track while the 18 mm stud shank takes the pin or shaft; the 58 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 cam follower with needle rollers executions fatigue load limit Pu 3.1 kN at 18 mm stud gives a specific load of 0.79 kN per mm; the limiting speed is 2,200 r/min the 58 mm width carries the load at 0.24 kN per mm of roller complement; section height 11.0 mm between stud and track surface determines the outer-ring bending stiffness mass 250 g over a 40x58 mm envelope works out to 0.108 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 18 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers KRV denotes the full-complement cam follower: no cage, the maximum number of needle rollers for the 40 mm envelope, raising C0 to 26.5 kN at the cost of the 2200 r/min speed limit 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 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 18 mm stud fit standard cam and rail geometries in robotic arm track guidance the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 250 g mass is low enough for rapid indexing cycles the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed", "applications": [ "robotic arm track guidance", "glass processing line conveyors", "paper mill web guide rollers", "automatic assembly machine linkages" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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 KRV-40-PPA?", "a": "KRV-40-PPA is a full-complement cam follower with needle rollers with 40 mm outside diameter, 18 mm stud shank diameter and 58 mm overall width. The stud is 18 mm and the track contact diameter is 40 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 40x18x58 mm envelope and the 2200 r/min limiting speed." }, { "q": "What is the load capacity of KRV-40-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": "KRV", "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": [ "KRV-40-PPA", "KRV 40 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 2200, "max_rpm": 2200 }, { "sku": "KRV-47-PPA", "brand": "SKF", "manufacturer_designation": "KRV 47 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 47, "B_mm": 66, "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": 390, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 47 mm outside diameter runs on the track while the 20 mm stud shank takes the pin or shaft; the 66 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 cam follower with needle rollers executions fatigue load limit Pu 5 kN at 20 mm stud gives a specific load of 0.97 kN per mm; the limiting speed is 1,900 r/min the 66 mm width carries the load at 0.29 kN per mm of roller complement; section height 13.5 mm between stud and track surface determines the outer-ring bending stiffness mass 390 g over a 47x66 mm envelope works out to 0.126 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 20 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers KRV denotes the full-complement cam follower: no cage, the maximum number of needle rollers for the 47 mm envelope, raising C0 to 41.5 kN at the cost of the 1900 r/min speed limit 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 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 stud fit standard cam and rail geometries in woodworking machinery feed rollers the 47 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 390 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": [ "textile machine cam drives", "automotive welding jig positioners", "agricultural equipment cam followers", "packaging machine timing cams" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track" ], "faq": [ { "q": "What are the dimensions of the KRV-47-PPA?", "a": "KRV-47-PPA is a full-complement cam follower with needle rollers with 47 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 47 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 47x20x66 mm envelope and the 1900 r/min limiting speed." }, { "q": "What is the load capacity of KRV-47-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": "KRV", "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": [ "KRV-47-PPA", "KRV 47 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1900, "max_rpm": 1900 }, { "sku": "KRV-52-PPA", "brand": "SKF", "manufacturer_designation": "KRV 52 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 52, "B_mm": 66, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 20.9, "static_load_kN": 46.5, "fatigue_load_limit_kN": 5.6, "weight_g": 460, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 52 mm outside diameter runs on the track while the 20 mm stud shank takes the pin or shaft; the 66 mm overall width spreads the Hertzian contact over the outer ring published ratings C 20.9 kN and C0 46.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.45 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 5.6 kN at 20 mm stud gives a specific load of 1.04 kN per mm; the limiting speed is 1,900 r/min the 66 mm width carries the load at 0.32 kN per mm of roller complement; section height 16.0 mm between stud and track surface determines the outer-ring bending stiffness mass 460 g over a 52x66 mm envelope works out to 0.134 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 20 mm stud shank 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 KRV execution is the heavy-static counterpart of KR: full complement of needle rollers for maximum load capacity in slow or oscillating cam tracks the PPA variant has a crowned track surface: the 52 mm OD is finished with a large-radius crown that compensates for minor track misalignment and reduces edge stress concentration 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 20 mm stud fit standard cam and rail geometries in paper mill web guide rollers the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 460 g mass is low enough for rapid indexing cycles the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "applications": [ "automotive welding jig positioners", "linear guide and track systems", "conveyor transfer and diverting rollers", "woodworking machinery feed rollers" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "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 KRV-52-PPA?", "a": "KRV-52-PPA is a full-complement cam follower with needle rollers with 52 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 52 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 52x20x66 mm envelope and the 1900 r/min limiting speed." }, { "q": "What is the load capacity of KRV-52-PPA?", "a": "The published basic dynamic load rating C is 20.9 kN and the basic static load rating C0 is 46.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRV", "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": [ "KRV-52-PPA", "KRV 52 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1900, "max_rpm": 1900 }, { "sku": "KRV-62-PPA", "brand": "SKF", "manufacturer_designation": "KRV 62 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 62, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 31.4, "static_load_kN": 72, "fatigue_load_limit_kN": 9, "weight_g": 790, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 62 mm outside diameter runs on the track while the 24 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 31.4 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 cam follower with needle rollers executions fatigue load limit Pu 9 kN at 24 mm stud gives a specific load of 1.31 kN per mm; the limiting speed is 1,700 r/min the 80 mm width carries the load at 0.39 kN per mm of roller complement; section height 19.0 mm between stud and track surface determines the outer-ring bending stiffness mass 790 g over a 62x80 mm envelope works out to 0.159 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 24 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers KRV denotes the full-complement cam follower: no cage, the maximum number of needle rollers for the 62 mm envelope, raising C0 to 72 kN at the cost of the 1700 r/min speed limit 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 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 62 mm track diameter and 24 mm stud fit standard cam and rail geometries in agricultural equipment cam followers the 62 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 790 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 the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "applications": [ "printing press roller followers", "sheet-metal forming press feeds", "automotive welding jig positioners", "conveyor transfer and diverting rollers" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "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", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life" ], "faq": [ { "q": "What are the dimensions of the KRV-62-PPA?", "a": "KRV-62-PPA is a full-complement cam follower with needle rollers with 62 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 62 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 62x24x80 mm envelope and the 1700 r/min limiting speed." }, { "q": "What is the load capacity of KRV-62-PPA?", "a": "The published basic dynamic load rating C is 31.4 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": "KRV", "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": [ "KRV-62-PPA", "KRV 62 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1700, "max_rpm": 1700 }, { "sku": "KRV-72-PPA", "brand": "SKF", "manufacturer_designation": "KRV 72 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 72, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 33, "static_load_kN": 80, "fatigue_load_limit_kN": 9.8, "weight_g": 1050, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 72 mm outside diameter runs on the track while the 24 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 33 kN and C0 80 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.41 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 9.8 kN at 24 mm stud gives a specific load of 1.38 kN per mm; the limiting speed is 1,700 r/min the 80 mm width carries the load at 0.41 kN per mm of roller complement; section height 24.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1050 g over a 72x80 mm envelope works out to 0.182 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 24 mm stud shank 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 KRV denotes the full-complement cam follower: no cage, the maximum number of needle rollers for the 72 mm envelope, raising C0 to 80 kN at the cost of the 1700 r/min speed limit 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 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 72 mm track diameter and 24 mm stud fit standard cam and rail geometries in food processing line track rollers the 72 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1050 g mass is low enough for rapid indexing cycles the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "applications": [ "food processing line track rollers", "paper mill web guide rollers", "printing press roller followers", "automotive welding jig positioners" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "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 KRV-72-PPA?", "a": "KRV-72-PPA is a full-complement cam follower with needle rollers with 72 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 72 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 72x24x80 mm envelope and the 1700 r/min limiting speed." }, { "q": "What is the load capacity of KRV-72-PPA?", "a": "The published basic dynamic load rating C is 33 kN and the basic static load rating C0 is 80 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRV", "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": [ "KRV-72-PPA", "KRV 72 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1700, "max_rpm": 1700 }, { "sku": "KRV-80-PPA", "brand": "SKF", "manufacturer_designation": "KRV 80 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 45.7, "static_load_kN": 114, "fatigue_load_limit_kN": 14, "weight_g": 1650, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 80 mm outside diameter runs on the track while the 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 45.7 kN and C0 114 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.40 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 14 kN at 30 mm stud gives a specific load of 1.52 kN per mm; the limiting speed is 1,400 r/min the 100 mm width carries the load at 0.46 kN per mm of roller complement; section height 25.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1650 g over a 80x100 mm envelope works out to 0.206 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 30 mm stud shank this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the KRV execution is the heavy-static counterpart of KR: full complement of needle rollers for maximum load capacity in slow or oscillating cam tracks 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 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 80 mm track diameter and 30 mm stud fit standard cam and rail geometries in agricultural equipment cam followers the 80 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1650 g mass is low enough for rapid indexing cycles the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "applications": [ "printing press roller followers", "sheet-metal forming press feeds", "automotive welding jig positioners", "conveyor transfer and diverting rollers" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "pitfalls": [ "the absence of a cage increases friction torque; check that the cam drive can overcome the drag at low speed", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate", "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 KRV-80-PPA?", "a": "KRV-80-PPA is a full-complement cam follower with needle rollers with 80 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 80 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 80x30x100 mm envelope and the 1400 r/min limiting speed." }, { "q": "What is the load capacity of KRV-80-PPA?", "a": "The published basic dynamic load rating C is 45.7 kN and the basic static load rating C0 is 114 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRV", "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": [ "KRV-80-PPA", "KRV 80 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1400, "max_rpm": 1400 }, { "sku": "KRV-90-PPA", "brand": "SKF", "manufacturer_designation": "KRV 90 PPA", "series": "KR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 47.3, "static_load_kN": 122, "fatigue_load_limit_kN": 15, "weight_g": 2000, "weight_estimated": false, "temp_min_c": -40, "temp_max_c": 120, "standard": "ISO 7063", "naming_rule_text": "the 90 mm outside diameter runs on the track while the 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 47.3 kN and C0 122 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.39 is typical for full-complement cam follower with needle rollers executions fatigue load limit Pu 15 kN at 30 mm stud gives a specific load of 1.58 kN per mm; the limiting speed is 1,400 r/min the 100 mm width carries the load at 0.47 kN per mm of roller complement; section height 30.0 mm between stud and track surface determines the outer-ring bending stiffness mass 2000 g over a 90x100 mm envelope works out to 0.222 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty the 30 mm stud diameter places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the KRV execution is the heavy-static counterpart of KR: full complement of needle rollers for maximum load capacity in slow or oscillating cam tracks 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 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 90 mm track diameter and 30 mm stud fit standard cam and rail geometries in woodworking machinery feed rollers the 90 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 2000 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": [ "linear guide and track systems", "automotive welding jig positioners", "robotic arm track guidance", "paper mill web guide rollers" ], "failure_modes": [ "full-complement needle rollers have no cage to separate them — momentary unloading can let rollers skew and jam in the track", "the higher static capacity of the full complement does not raise the fatigue life; the dynamic C rating still limits the L10 life", "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track", "the heavy roller pack and full complement make this the highest-inertia cam follower; verify the drive can accelerate the mass at the required cam rate" ], "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", "the full complement is sensitive to contamination — any particle that enters the raceway can jam the roller pack and score the track" ], "faq": [ { "q": "What are the dimensions of the KRV-90-PPA?", "a": "KRV-90-PPA is a full-complement cam follower with needle rollers with 90 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 90 mm." }, { "q": "What does the KRV designation mean?", "a": "The KRV prefix identifies this as a full-complement cam follower with needle rollers. In the SKF catalogue this designation carries the full specification including the 90x30x100 mm envelope and the 1400 r/min limiting speed." }, { "q": "What is the load capacity of KRV-90-PPA?", "a": "The published basic dynamic load rating C is 47.3 kN and the basic static load rating C0 is 122 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "KRV", "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": [ "KRV-90-PPA", "KRV 90 PPA" ], "locale_variants": {}, "limiting_speed_rpm": 1400, "max_rpm": 1400 }, { "sku": "NUKR-35-A", "brand": "SKF", "manufacturer_designation": "NUKR 35 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 160, "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 16 mm stud shank takes the pin or shaft; the 52 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 2 kN at 16 mm stud gives a specific load of 1.05 kN per mm; the limiting speed is 5,000 r/min the 52 mm width carries the load at 0.32 kN per mm of roller complement; section height 9.5 mm between stud and track surface determines the outer-ring bending stiffness mass 160 g over a 35x52 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 16 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NUKR is the heavy-duty stud-type track roller: two full rows of cylindrical rollers without cage give the highest dynamic capacity of the cam follower 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 35 mm track diameter and 16 mm stud fit standard cam and rail geometries in automotive welding jig positioners the 35 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 160 g mass is low enough for rapid indexing cycles the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "applications": [ "packaging machine timing cams", "food processing line track rollers", "glass processing line conveyors", "linear guide and track systems" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress" ], "faq": [ { "q": "What are the dimensions of the NUKR-35-A?", "a": "NUKR-35-A is a full-complement cylindrical-roller cam follower with 35 mm outside diameter, 16 mm stud shank diameter and 52 mm overall width. The stud is 16 mm and the track contact diameter is 35 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 35x16x52 mm envelope and the 5000 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-35-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": "NUKR", "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": [ "NUKR-35-A", "NUKR 35 A" ], "locale_variants": {}, "limiting_speed_rpm": 5000, "max_rpm": 5000 }, { "sku": "NUKR-40-A", "brand": "SKF", "manufacturer_designation": "NUKR 40 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 240, "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 18 mm stud shank takes the pin or shaft; the 58 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 2.5 kN at 18 mm stud gives a specific load of 1.06 kN per mm; the limiting speed is 4,500 r/min the 58 mm width carries the load at 0.33 kN per mm of roller complement; section height 11.0 mm between stud and track surface determines the outer-ring bending stiffness mass 240 g over a 40x58 mm envelope works out to 0.103 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 18 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers NUKR identifies the full-complement cylindrical roller cam follower: two rows of cylindrical rollers give the highest radial ratings in the 40 mm size, with the outer ring axially guided by the stud head and a pressed-on flange ring 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 18 mm stud fit standard cam and rail geometries in automotive welding jig positioners the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 240 g mass is low enough for rapid indexing cycles the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile", "applications": [ "paper mill web guide rollers", "food processing line track rollers", "automatic assembly machine linkages", "printing press roller followers" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "faq": [ { "q": "What are the dimensions of the NUKR-40-A?", "a": "NUKR-40-A is a full-complement cylindrical-roller cam follower with 40 mm outside diameter, 18 mm stud shank diameter and 58 mm overall width. The stud is 18 mm and the track contact diameter is 40 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 40x18x58 mm envelope and the 4500 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-40-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": "NUKR", "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": [ "NUKR-40-A", "NUKR 40 A" ], "locale_variants": {}, "limiting_speed_rpm": 4500, "max_rpm": 4500 }, { "sku": "NUKR-47-A", "brand": "SKF", "manufacturer_designation": "NUKR 47 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 47, "B_mm": 66, "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": 380, "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 stud shank takes the pin or shaft; the 66 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 3.9 kN at 20 mm stud gives a specific load of 1.43 kN per mm; the limiting speed is 3,800 r/min the 66 mm width carries the load at 0.43 kN per mm of roller complement; section height 13.5 mm between stud and track surface determines the outer-ring bending stiffness mass 380 g over a 47x66 mm envelope works out to 0.123 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 20 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages reading NUKR: double-row full-complement cylindrical roller cam follower; the 20 mm stud carries the two roller rows and the outer ring is guided axially by the flange ring 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 47 mm track diameter and 20 mm stud fit standard cam and rail geometries in automatic assembly machine linkages the 47 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 380 g mass is low enough for rapid indexing cycles the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "applications": [ "sheet-metal forming press feeds", "robotic arm track guidance", "textile machine cam drives", "agricultural equipment cam followers" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile", "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life" ], "faq": [ { "q": "What are the dimensions of the NUKR-47-A?", "a": "NUKR-47-A is a full-complement cylindrical-roller cam follower with 47 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 47 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 47x20x66 mm envelope and the 3800 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-47-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": "NUKR", "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": [ "NUKR-47-A", "NUKR 47 A" ], "locale_variants": {}, "limiting_speed_rpm": 3800, "max_rpm": 3800 }, { "sku": "NUKR-52-A", "brand": "SKF", "manufacturer_designation": "NUKR 52 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 52, "B_mm": 66, "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": 450, "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 stud shank takes the pin or shaft; the 66 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 4.25 kN at 20 mm stud gives a specific load of 1.48 kN per mm; the limiting speed is 3,200 r/min the 66 mm width carries the load at 0.45 kN per mm of roller complement; section height 16.0 mm between stud and track surface determines the outer-ring bending stiffness mass 450 g over a 52x66 mm envelope works out to 0.131 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm stud shank 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 NUKR identifies the full-complement cylindrical roller cam follower: two rows of cylindrical rollers give the highest radial ratings in the 52 mm size, with the outer ring axially guided by the stud head and a pressed-on flange ring 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 20 mm stud fit standard cam and rail geometries in robotic arm track guidance the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 450 g mass is low enough for rapid indexing cycles the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "applications": [ "robotic arm track guidance", "glass processing line conveyors", "paper mill web guide rollers", "automatic assembly machine linkages" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension" ], "faq": [ { "q": "What are the dimensions of the NUKR-52-A?", "a": "NUKR-52-A is a full-complement cylindrical-roller cam follower with 52 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 52 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 52x20x66 mm envelope and the 3200 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-52-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": "NUKR", "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": [ "NUKR-52-A", "NUKR 52 A" ], "locale_variants": {}, "limiting_speed_rpm": 3200, "max_rpm": 3200 }, { "sku": "NUKR-62-A", "brand": "SKF", "manufacturer_designation": "NUKR 62 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 62, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 41.3, "static_load_kN": 48, "fatigue_load_limit_kN": 5.85, "weight_g": 800, "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 24 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 41.3 kN and C0 48 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.86 is typical for full-complement cylindrical-roller cam follower executions fatigue load limit Pu 5.85 kN at 24 mm stud gives a specific load of 1.72 kN per mm; the limiting speed is 2,600 r/min the 80 mm width carries the load at 0.52 kN per mm of roller complement; section height 19.0 mm between stud and track surface determines the outer-ring bending stiffness mass 800 g over a 62x80 mm envelope works out to 0.161 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 24 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NUKR is the heavy-duty stud-type track roller: two full rows of cylindrical rollers without cage give the highest dynamic capacity of the cam follower range 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 24 mm stud fit standard cam and rail geometries in packaging machine timing cams the 62 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 800 g mass is low enough for rapid indexing cycles full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "applications": [ "material handling lift and lower tracks", "textile machine cam drives", "sheet-metal forming press feeds", "agricultural equipment cam followers" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension" ], "faq": [ { "q": "What are the dimensions of the NUKR-62-A?", "a": "NUKR-62-A is a full-complement cylindrical-roller cam follower with 62 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 62 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 62x24x80 mm envelope and the 2600 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-62-A?", "a": "The published basic dynamic load rating C is 41.3 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": "NUKR", "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": [ "NUKR-62-A", "NUKR 62 A" ], "locale_variants": {}, "limiting_speed_rpm": 2600, "max_rpm": 2600 }, { "sku": "NUKR-72-A", "brand": "SKF", "manufacturer_designation": "NUKR 72 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 72, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 45.7, "static_load_kN": 58.5, "fatigue_load_limit_kN": 7.1, "weight_g": 1000, "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 24 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 45.7 kN and C0 58.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.78 is typical for full-complement cylindrical-roller cam follower executions fatigue load limit Pu 7.1 kN at 24 mm stud gives a specific load of 1.90 kN per mm; the limiting speed is 2,000 r/min the 80 mm width carries the load at 0.57 kN per mm of roller complement; section height 24.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1000 g over a 72x80 mm envelope works out to 0.174 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 24 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers reading NUKR: double-row full-complement cylindrical roller cam follower; the 24 mm stud carries the two roller rows and the outer ring is guided axially by the flange ring 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 72 mm track diameter and 24 mm stud fit standard cam and rail geometries in conveyor transfer and diverting rollers the 72 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1000 g mass is low enough for rapid indexing cycles the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "applications": [ "sheet-metal forming press feeds", "printing press roller followers", "textile machine cam drives", "agricultural equipment cam followers" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress" ], "faq": [ { "q": "What are the dimensions of the NUKR-72-A?", "a": "NUKR-72-A is a full-complement cylindrical-roller cam follower with 72 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 72 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 72x24x80 mm envelope and the 2000 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-72-A?", "a": "The published basic dynamic load rating C is 45.7 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": "NUKR", "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": [ "NUKR-72-A", "NUKR 72 A" ], "locale_variants": {}, "limiting_speed_rpm": 2000, "max_rpm": 2000 }, { "sku": "NUKR-80-A", "brand": "SKF", "manufacturer_designation": "NUKR 80 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 69.3, "static_load_kN": 86.5, "fatigue_load_limit_kN": 10.8, "weight_g": 1600, "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 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 69.3 kN and C0 86.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.80 is typical for full-complement cylindrical-roller cam follower executions fatigue load limit Pu 10.8 kN at 30 mm stud gives a specific load of 2.31 kN per mm; the limiting speed is 1,900 r/min the 100 mm width carries the load at 0.69 kN per mm of roller complement; section height 25.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1600 g over a 80x100 mm envelope works out to 0.200 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 30 mm stud shank this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity reading NUKR: double-row full-complement cylindrical roller cam follower; the 30 mm stud carries the two roller rows and the outer ring is guided axially by the flange ring 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 80 mm track diameter and 30 mm stud fit standard cam and rail geometries in material handling lift and lower tracks the 80 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1600 g mass is low enough for rapid indexing cycles the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "applications": [ "packaging machine timing cams", "woodworking machinery feed rollers", "glass processing line conveyors", "linear guide and track systems" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile", "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange" ], "faq": [ { "q": "What are the dimensions of the NUKR-80-A?", "a": "NUKR-80-A is a full-complement cylindrical-roller cam follower with 80 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 80 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 80x30x100 mm envelope and the 1900 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-80-A?", "a": "The published basic dynamic load rating C is 69.3 kN and the basic static load rating C0 is 86.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "NUKR", "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": [ "NUKR-80-A", "NUKR 80 A" ], "locale_variants": {}, "limiting_speed_rpm": 1900, "max_rpm": 1900 }, { "sku": "NUKR-90-A", "brand": "SKF", "manufacturer_designation": "NUKR 90 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 78.1, "static_load_kN": 102, "fatigue_load_limit_kN": 12.7, "weight_g": 1950, "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 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 78.1 kN and C0 102 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.77 is typical for full-complement cylindrical-roller cam follower executions fatigue load limit Pu 12.7 kN at 30 mm stud gives a specific load of 2.60 kN per mm; the limiting speed is 1,900 r/min the 100 mm width carries the load at 0.78 kN per mm of roller complement; section height 30.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1950 g over a 90x100 mm envelope works out to 0.217 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 30 mm stud 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 NUKR identifies the full-complement cylindrical roller cam follower: two rows of cylindrical rollers give the highest radial ratings in the 90 mm size, with the outer ring axially guided by the stud head and a pressed-on flange ring 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 30 mm stud fit standard cam and rail geometries in conveyor transfer and diverting rollers the 90 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1950 g mass is low enough for rapid indexing cycles the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "applications": [ "sheet-metal forming press feeds", "printing press roller followers", "textile machine cam drives", "agricultural equipment cam followers" ], "failure_modes": [ "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life", "the stud head and pressed-on flange ring provide the only axial guidance — side thrust from a helical cam can dislodge the flange", "full-complement cylindrical rollers are stiff but unforgiving: any shaft deflection directly increases edge stress", "the twin-row construction is the widest cam follower option; verify the track channel width accommodates the full B dimension", "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile" ], "pitfalls": [ "the heavy section and full complement make this the stiffest cam follower — any stud bending directly increases edge stress", "the cylindrical rollers are crowned at the ends to reduce edge stress; do not confuse this with the PPA crowned outer-ring profile", "the two cylindrical roller rows share the outer ring bending load; a misaligned track concentrates the load on one row and halves the life" ], "faq": [ { "q": "What are the dimensions of the NUKR-90-A?", "a": "NUKR-90-A is a full-complement cylindrical-roller cam follower with 90 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 90 mm." }, { "q": "What does the NUKR designation mean?", "a": "The NUKR prefix identifies this as a full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 90x30x100 mm envelope and the 1900 r/min limiting speed." }, { "q": "What is the load capacity of NUKR-90-A?", "a": "The published basic dynamic load rating C is 78.1 kN and the basic static load rating C0 is 102 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "NUKR", "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": [ "NUKR-90-A", "NUKR 90 A" ], "locale_variants": {}, "limiting_speed_rpm": 1900, "max_rpm": 1900 }, { "sku": "NUKRE-35-A", "brand": "SKF", "manufacturer_designation": "NUKRE 35 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 35, "B_mm": 52, "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": 180, "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 20 mm stud shank takes the pin or shaft; the 52 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 full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 2 kN at 20 mm stud gives a specific load of 0.84 kN per mm; the limiting speed is 5,000 r/min the 52 mm width carries the load at 0.32 kN per mm of roller complement; section height 7.5 mm between stud and track surface determines the outer-ring bending stiffness mass 180 g over a 35x52 mm envelope works out to 0.099 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-high-speed cam duty the 20 mm stud shank 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 NUKR designation marks the twin-row cylindrical roller cam follower — the catalogue choice for the heaviest radial loads and shock-dominated cam duty NUKRE provides the same heavy-section twin-row capacity as NUKR with the added benefit of radial adjustment via the eccentric collar on the stud 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 35 mm track diameter and 20 mm stud fit standard cam and rail geometries in glass processing line conveyors the 35 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 180 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", "agricultural equipment cam followers", "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": [ "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" ], "faq": [ { "q": "What are the dimensions of the NUKRE-35-A?", "a": "NUKRE-35-A is a full-complement cylindrical-roller cam follower with eccentric collar with 35 mm outside diameter, 20 mm stud shank diameter and 52 mm overall width. The stud is 20 mm and the track contact diameter is 35 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 35x20x52 mm envelope and the 5000 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-35-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": "NUKRE", "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": [ "NUKRE-35-A", "NUKRE 35 A" ], "locale_variants": {}, "limiting_speed_rpm": 5000, "max_rpm": 5000 }, { "sku": "NUKRE-40-A", "brand": "SKF", "manufacturer_designation": "NUKRE 40 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 22, "D_mm": 40, "B_mm": 58, "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": 260, "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 22 mm stud shank takes the pin or shaft; the 58 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 full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 2.5 kN at 22 mm stud gives a specific load of 0.86 kN per mm; the limiting speed is 4,500 r/min the 58 mm width carries the load at 0.33 kN per mm of roller complement; section height 9.0 mm between stud and track surface determines the outer-ring bending stiffness mass 260 g over a 40x58 mm envelope works out to 0.112 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 22 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the NUKR designation marks the twin-row cylindrical roller cam follower — the catalogue choice for the heaviest radial loads and shock-dominated cam duty NUKRE provides the same heavy-section twin-row capacity as NUKR with the added benefit of radial adjustment via the eccentric collar on the stud 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 22 mm stud fit standard cam and rail geometries in automatic assembly machine linkages the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 260 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 integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring", "the narrow width concentrates the Hertzian contact stress; verify the track material hardness is sufficient for the calculated contact pressure", "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 NUKRE-40-A?", "a": "NUKRE-40-A is a full-complement cylindrical-roller cam follower with eccentric collar with 40 mm outside diameter, 22 mm stud shank diameter and 58 mm overall width. The stud is 22 mm and the track contact diameter is 40 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 40x22x58 mm envelope and the 4500 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-40-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": "NUKRE", "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": [ "NUKRE-40-A", "NUKRE 40 A" ], "locale_variants": {}, "limiting_speed_rpm": 4500, "max_rpm": 4500 }, { "sku": "NUKRE-47-A", "brand": "SKF", "manufacturer_designation": "NUKRE 47 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 47, "B_mm": 66, "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": 400, "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 24 mm stud shank takes the pin or shaft; the 66 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 full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 3.9 kN at 24 mm stud gives a specific load of 1.19 kN per mm; the limiting speed is 3,800 r/min the 66 mm width carries the load at 0.43 kN per mm of roller complement; section height 11.5 mm between stud and track surface determines the outer-ring bending stiffness mass 400 g over a 47x66 mm envelope works out to 0.129 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 24 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages NUKR is the heavy-duty stud-type track roller: two full rows of cylindrical rollers without cage give the highest dynamic capacity of the cam follower range the NUKRE designation adds on-machine adjustability to the heavy twin-row cylindrical roller cam follower — the eccentric collar compensates for track wear and mounting tolerances 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 47 mm track diameter and 24 mm stud fit standard cam and rail geometries in automotive welding jig positioners the 47 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 400 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": [ "material handling lift and lower tracks", "food processing line track rollers", "sheet-metal forming press feeds", "textile machine cam drives" ], "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", "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" ], "faq": [ { "q": "What are the dimensions of the NUKRE-47-A?", "a": "NUKRE-47-A is a full-complement cylindrical-roller cam follower with eccentric collar with 47 mm outside diameter, 24 mm stud shank diameter and 66 mm overall width. The stud is 24 mm and the track contact diameter is 47 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 47x24x66 mm envelope and the 3800 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-47-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": "NUKRE", "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": [ "NUKRE-47-A", "NUKRE 47 A" ], "locale_variants": {}, "limiting_speed_rpm": 3800, "max_rpm": 3800 }, { "sku": "NUKRE-52-A", "brand": "SKF", "manufacturer_designation": "NUKRE 52 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 52, "B_mm": 66, "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": 470, "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 24 mm stud shank takes the pin or shaft; the 66 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 full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 4.25 kN at 24 mm stud gives a specific load of 1.24 kN per mm; the limiting speed is 3,200 r/min the 66 mm width carries the load at 0.45 kN per mm of roller complement; section height 14.0 mm between stud and track surface determines the outer-ring bending stiffness mass 470 g over a 52x66 mm envelope works out to 0.137 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 24 mm stud shank 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 NUKR prefix names a twin-row cylindrical roller cam follower without cage — maximum load capacity on the 52 mm track diameter, suitable for heavy cam and roller-table duty NUKRE combines the twin-row cylindrical roller capacity with an eccentric collar: rotating the collar on the stud shifts the 52 mm roller centre for fine positioning 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 24 mm stud fit standard cam and rail geometries in linear guide and track systems the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 470 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", "packaging machine timing cams", "agricultural equipment cam followers", "glass processing line conveyors" ], "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", "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" ], "faq": [ { "q": "What are the dimensions of the NUKRE-52-A?", "a": "NUKRE-52-A is a full-complement cylindrical-roller cam follower with eccentric collar with 52 mm outside diameter, 24 mm stud shank diameter and 66 mm overall width. The stud is 24 mm and the track contact diameter is 52 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 52x24x66 mm envelope and the 3200 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-52-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": "NUKRE", "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": [ "NUKRE-52-A", "NUKRE 52 A" ], "locale_variants": {}, "limiting_speed_rpm": 3200, "max_rpm": 3200 }, { "sku": "NUKRE-62-A", "brand": "SKF", "manufacturer_designation": "NUKRE 62 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 28, "D_mm": 62, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 41.3, "static_load_kN": 48, "fatigue_load_limit_kN": 5.85, "weight_g": 820, "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 28 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 41.3 kN and C0 48 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.86 is typical for full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 5.85 kN at 28 mm stud gives a specific load of 1.47 kN per mm; the limiting speed is 2,600 r/min the 80 mm width carries the load at 0.52 kN per mm of roller complement; section height 17.0 mm between stud and track surface determines the outer-ring bending stiffness mass 820 g over a 62x80 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 with a 28 mm stud shank this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the NUKR designation marks the twin-row cylindrical roller cam follower — the catalogue choice for the heaviest radial loads and shock-dominated cam duty NUKRE provides the same heavy-section twin-row capacity as NUKR with the added benefit of radial adjustment via the eccentric collar on the stud 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 62 mm track diameter and 28 mm stud fit standard cam and rail geometries in conveyor transfer and diverting rollers the 62 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 820 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": [ "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": [ "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 NUKRE-62-A?", "a": "NUKRE-62-A is a full-complement cylindrical-roller cam follower with eccentric collar with 62 mm outside diameter, 28 mm stud shank diameter and 80 mm overall width. The stud is 28 mm and the track contact diameter is 62 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 62x28x80 mm envelope and the 2600 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-62-A?", "a": "The published basic dynamic load rating C is 41.3 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": "NUKRE", "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": [ "NUKRE-62-A", "NUKRE 62 A" ], "locale_variants": {}, "limiting_speed_rpm": 2600, "max_rpm": 2600 }, { "sku": "NUKRE-72-A", "brand": "SKF", "manufacturer_designation": "NUKRE 72 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 28, "D_mm": 72, "B_mm": 80, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 45.7, "static_load_kN": 58.5, "fatigue_load_limit_kN": 7.1, "weight_g": 1050, "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 28 mm stud shank takes the pin or shaft; the 80 mm overall width spreads the Hertzian contact over the outer ring published ratings C 45.7 kN and C0 58.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.78 is typical for full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 7.1 kN at 28 mm stud gives a specific load of 1.63 kN per mm; the limiting speed is 2,000 r/min the 80 mm width carries the load at 0.57 kN per mm of roller complement; section height 22.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1050 g over a 72x80 mm envelope works out to 0.182 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 28 mm stud diameter places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the NUKR designation marks the twin-row cylindrical roller cam follower — the catalogue choice for the heaviest radial loads and shock-dominated cam duty NUKRE provides the same heavy-section twin-row capacity as NUKR with the added benefit of radial adjustment via the eccentric collar on the stud 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 28 mm stud fit standard cam and rail geometries in packaging machine timing cams the 72 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1050 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": [ "packaging machine timing cams", "textile machine cam drives", "glass processing line conveyors", "linear guide and track systems" ], "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 flange rings the roller needs lateral guidance from the housing shoulders — running without side support lets the roller walk off the track", "without integral flanges, axial float must be controlled by external washers or circlips — free axial movement causes edge loading on the outer ring" ], "faq": [ { "q": "What are the dimensions of the NUKRE-72-A?", "a": "NUKRE-72-A is a full-complement cylindrical-roller cam follower with eccentric collar with 72 mm outside diameter, 28 mm stud shank diameter and 80 mm overall width. The stud is 28 mm and the track contact diameter is 72 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 72x28x80 mm envelope and the 2000 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-72-A?", "a": "The published basic dynamic load rating C is 45.7 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": "NUKRE", "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": [ "NUKRE-72-A", "NUKRE 72 A" ], "locale_variants": {}, "limiting_speed_rpm": 2000, "max_rpm": 2000 }, { "sku": "NUKRE-80-A", "brand": "SKF", "manufacturer_designation": "NUKRE 80 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 35, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 69.3, "static_load_kN": 86.5, "fatigue_load_limit_kN": 10.8, "weight_g": 1650, "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 stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 69.3 kN and C0 86.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.80 is typical for full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 10.8 kN at 35 mm stud gives a specific load of 1.98 kN per mm; the limiting speed is 1,900 r/min the 100 mm width carries the load at 0.69 kN per mm of roller complement; section height 22.5 mm between stud and track surface determines the outer-ring bending stiffness mass 1650 g over a 80x100 mm envelope works out to 0.206 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty with a 35 mm stud shank this is a medium-size track roller — the envelope is large enough for sealed, greased-for-life executions without sacrificing dynamic capacity the NUKR designation marks the twin-row cylindrical roller cam follower — the catalogue choice for the heaviest radial loads and shock-dominated cam duty NUKRE provides the same heavy-section twin-row capacity as NUKR with the added benefit of radial adjustment via the eccentric collar on the stud 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 35 mm stud fit standard cam and rail geometries in conveyor transfer and diverting rollers the 80 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1650 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", "printing press roller followers", "woodworking machinery feed rollers", "cam mechanisms and indexing drives" ], "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 NUKRE-80-A?", "a": "NUKRE-80-A is a full-complement cylindrical-roller cam follower with eccentric collar with 80 mm outside diameter, 35 mm stud shank diameter and 100 mm overall width. The stud is 35 mm and the track contact diameter is 80 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 80x35x100 mm envelope and the 1900 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-80-A?", "a": "The published basic dynamic load rating C is 69.3 kN and the basic static load rating C0 is 86.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "NUKRE", "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": [ "NUKRE-80-A", "NUKRE 80 A" ], "locale_variants": {}, "limiting_speed_rpm": 1900, "max_rpm": 1900 }, { "sku": "NUKRE-90-A", "brand": "SKF", "manufacturer_designation": "NUKRE 90 A", "series": "NUKR-series", "type": "cam_follower", "d_mm": 35, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 78.1, "static_load_kN": 102, "fatigue_load_limit_kN": 12.7, "weight_g": 2000, "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 35 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 78.1 kN and C0 102 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.77 is typical for full-complement cylindrical-roller cam follower with eccentric collar executions fatigue load limit Pu 12.7 kN at 35 mm stud gives a specific load of 2.23 kN per mm; the limiting speed is 1,900 r/min the 100 mm width carries the load at 0.78 kN per mm of roller complement; section height 27.5 mm between stud and track surface determines the outer-ring bending stiffness mass 2000 g over a 90x100 mm envelope works out to 0.222 g per mm² of projected area — a useful figure when sizing the drive inertia for low-speed cam duty at 35 mm stud 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 NUKR is the heavy-duty stud-type track roller: two full rows of cylindrical rollers without cage give the highest dynamic capacity of the cam follower range the NUKRE designation adds on-machine adjustability to the heavy twin-row cylindrical roller cam follower — the eccentric collar compensates for track wear and mounting tolerances 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 35 mm stud fit standard cam and rail geometries in material handling lift and lower tracks the 90 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 2000 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": [ "material handling lift and lower tracks", "woodworking machinery feed rollers", "sheet-metal forming press feeds", "textile machine cam drives" ], "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 NUKRE-90-A?", "a": "NUKRE-90-A is a full-complement cylindrical-roller cam follower with eccentric collar with 90 mm outside diameter, 35 mm stud shank diameter and 100 mm overall width. The stud is 35 mm and the track contact diameter is 90 mm." }, { "q": "What does the NUKRE designation mean?", "a": "The NUKRE prefix identifies this as a full-complement cylindrical-roller cam follower with eccentric collar. In the SKF catalogue this designation carries the full specification including the 90x35x100 mm envelope and the 1900 r/min limiting speed." }, { "q": "What is the load capacity of NUKRE-90-A?", "a": "The published basic dynamic load rating C is 78.1 kN and the basic static load rating C0 is 102 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "NUKRE", "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": [ "NUKRE-90-A", "NUKRE 90 A" ], "locale_variants": {}, "limiting_speed_rpm": 1900, "max_rpm": 1900 }, { "sku": "PWKR-35-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 35.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 16, "D_mm": 35, "B_mm": 52, "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": 160, "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 16 mm stud shank takes the pin or shaft; the 52 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 1.2 kN at 16 mm stud gives a specific load of 0.74 kN per mm; the limiting speed is 5,000 r/min the 52 mm width carries the load at 0.23 kN per mm of roller complement; section height 9.5 mm between stud and track surface determines the outer-ring bending stiffness mass 160 g over a 35x52 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 16 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages reading PWKR..2RS: sealed double-row cylindrical roller cam follower; the 2RS suffix means integral contact seals for maintenance-free track duty 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 16 mm stud fit standard cam and rail geometries in automatic assembly machine linkages the 35 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 160 g mass is low enough for rapid indexing cycles the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "applications": [ "automatic assembly machine linkages", "robotic arm track guidance", "food processing line track rollers", "printing press roller followers" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "pitfalls": [ "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "faq": [ { "q": "What are the dimensions of the PWKR-35.2RS?", "a": "PWKR-35.2RS is a sealed full-complement cylindrical-roller cam follower with 35 mm outside diameter, 16 mm stud shank diameter and 52 mm overall width. The stud is 16 mm and the track contact diameter is 35 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 35x16x52 mm envelope and the 5000 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-35.2RS?", "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": "PWKR", "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": [ "PWKR-35-2RS", "PWKR 35.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 5000, "max_rpm": 5000 }, { "sku": "PWKR-40-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 40.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 18, "D_mm": 40, "B_mm": 58, "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": 240, "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 18 mm stud shank takes the pin or shaft; the 58 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 1.5 kN at 18 mm stud gives a specific load of 0.77 kN per mm; the limiting speed is 4,500 r/min the 58 mm width carries the load at 0.24 kN per mm of roller complement; section height 11.0 mm between stud and track surface determines the outer-ring bending stiffness mass 240 g over a 40x58 mm envelope works out to 0.103 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 18 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers PWKR is the maintenance-free heavy cam follower: the twin-row full complement is sealed on both sides with NBR contact lips, eliminating relubrication and excluding contamination 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 18 mm stud fit standard cam and rail geometries in automatic assembly machine linkages the 40 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 240 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": [ "conveyor transfer and diverting rollers", "robotic arm track guidance", "woodworking machinery feed rollers", "cam mechanisms and indexing drives" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "pitfalls": [ "the sealed twin-row construction is the heaviest cam follower 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 PWKR-40.2RS?", "a": "PWKR-40.2RS is a sealed full-complement cylindrical-roller cam follower with 40 mm outside diameter, 18 mm stud shank diameter and 58 mm overall width. The stud is 18 mm and the track contact diameter is 40 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 40x18x58 mm envelope and the 4500 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-40.2RS?", "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": "PWKR", "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": [ "PWKR-40-2RS", "PWKR 40.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 4500, "max_rpm": 4500 }, { "sku": "PWKR-47-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 47.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 47, "B_mm": 66, "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": 380, "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 stud shank takes the pin or shaft; the 66 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 2.8 kN at 20 mm stud gives a specific load of 1.15 kN per mm; the limiting speed is 3,800 r/min the 66 mm width carries the load at 0.35 kN per mm of roller complement; section height 13.5 mm between stud and track surface determines the outer-ring bending stiffness mass 380 g over a 47x66 mm envelope works out to 0.123 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 20 mm stud shank 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 PWKR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the cam follower 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 47 mm track diameter and 20 mm stud fit standard cam and rail geometries in automotive welding jig positioners the 47 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 380 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 the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load", "applications": [ "automotive welding jig positioners", "food processing line track rollers", "conveyor transfer and diverting rollers", "woodworking machinery feed rollers" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "pitfalls": [ "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed twin-row construction is the heaviest cam follower option — verify the drive torque can accelerate the roller at the required cam profile rate" ], "faq": [ { "q": "What are the dimensions of the PWKR-47.2RS?", "a": "PWKR-47.2RS is a sealed full-complement cylindrical-roller cam follower with 47 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 47 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 47x20x66 mm envelope and the 3800 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-47.2RS?", "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": "PWKR", "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": [ "PWKR-47-2RS", "PWKR 47.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 3800, "max_rpm": 3800 }, { "sku": "PWKR-52-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 52.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 20, "D_mm": 52, "B_mm": 66, "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": 450, "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 stud shank takes the pin or shaft; the 66 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 3.05 kN at 20 mm stud gives a specific load of 1.19 kN per mm; the limiting speed is 3,200 r/min the 66 mm width carries the load at 0.36 kN per mm of roller complement; section height 16.0 mm between stud and track surface determines the outer-ring bending stiffness mass 450 g over a 52x66 mm envelope works out to 0.131 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 20 mm stud this size balances load capacity and envelope compactness — a frequent pick for packaging machines and printing press linkages the PWKR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the cam follower 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 52 mm track diameter and 20 mm stud fit standard cam and rail geometries in food processing line track rollers the 52 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 450 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 sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "applications": [ "textile machine cam drives", "paper mill web guide rollers", "agricultural equipment cam followers", "packaging machine timing cams" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "pitfalls": [ "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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate" ], "faq": [ { "q": "What are the dimensions of the PWKR-52.2RS?", "a": "PWKR-52.2RS is a sealed full-complement cylindrical-roller cam follower with 52 mm outside diameter, 20 mm stud shank diameter and 66 mm overall width. The stud is 20 mm and the track contact diameter is 52 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 52x20x66 mm envelope and the 3200 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-52.2RS?", "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": "PWKR", "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": [ "PWKR-52-2RS", "PWKR 52.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 3200, "max_rpm": 3200 }, { "sku": "PWKR-62-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 62.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 62, "B_mm": 80, "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": 800, "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 24 mm stud shank takes the pin or shaft; the 80 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 4.05 kN at 24 mm stud gives a specific load of 1.33 kN per mm; the limiting speed is 2,600 r/min the 80 mm width carries the load at 0.40 kN per mm of roller complement; section height 19.0 mm between stud and track surface determines the outer-ring bending stiffness mass 800 g over a 62x80 mm envelope works out to 0.161 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 24 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the PWKR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the cam follower range 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 62 mm track diameter and 24 mm stud fit standard cam and rail geometries in sheet-metal forming press feeds the 62 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 800 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": [ "glass processing line conveyors", "cam mechanisms and indexing drives", "linear guide and track systems", "robotic arm track guidance" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "pitfalls": [ "the sealed twin-row construction is the heaviest cam follower 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 PWKR-62.2RS?", "a": "PWKR-62.2RS is a sealed full-complement cylindrical-roller cam follower with 62 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 62 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 62x24x80 mm envelope and the 2600 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-62.2RS?", "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": "PWKR", "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": [ "PWKR-62-2RS", "PWKR 62.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 2600, "max_rpm": 2600 }, { "sku": "PWKR-72-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 72.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 24, "D_mm": 72, "B_mm": 80, "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": 1000, "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 24 mm stud shank takes the pin or shaft; the 80 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 full-complement cylindrical-roller cam follower executions fatigue load limit Pu 5.6 kN at 24 mm stud gives a specific load of 1.65 kN per mm; the limiting speed is 2,600 r/min the 80 mm width carries the load at 0.49 kN per mm of roller complement; section height 24.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1000 g over a 72x80 mm envelope works out to 0.174 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 24 mm stud diameter falls in the small-size band, the most common choice for general-purpose cam followers and light conveyor transfer rollers the PWKR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the cam follower range 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 72 mm track diameter and 24 mm stud fit standard cam and rail geometries in material handling lift and lower tracks the 72 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1000 g mass is low enough for rapid indexing cycles the sealed twin-row construction is the heaviest cam follower 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": [ "automotive welding jig positioners", "woodworking machinery feed rollers", "conveyor transfer and diverting rollers", "cam mechanisms and indexing drives" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "pitfalls": [ "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the sealed twin-row construction is the heaviest cam follower option — verify the drive torque can accelerate the roller at the required cam profile rate", "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 PWKR-72.2RS?", "a": "PWKR-72.2RS is a sealed full-complement cylindrical-roller cam follower with 72 mm outside diameter, 24 mm stud shank diameter and 80 mm overall width. The stud is 24 mm and the track contact diameter is 72 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 72x24x80 mm envelope and the 2600 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-72.2RS?", "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": "PWKR", "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": [ "PWKR-72-2RS", "PWKR 72.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 2600, "max_rpm": 2600 }, { "sku": "PWKR-80-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 80.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 80, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 57.2, "static_load_kN": 73.5, "fatigue_load_limit_kN": 9.3, "weight_g": 1600, "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 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 57.2 kN and C0 73.5 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.78 is typical for sealed full-complement cylindrical-roller cam follower executions fatigue load limit Pu 9.3 kN at 30 mm stud gives a specific load of 1.91 kN per mm; the limiting speed is 2,000 r/min the 100 mm width carries the load at 0.57 kN per mm of roller complement; section height 25.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1600 g over a 80x100 mm envelope works out to 0.200 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty at 30 mm stud 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 PWKR prefix denotes the sealed version of the twin-row cylindrical roller cam follower — greased for life and sealed against dust and moisture 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 30 mm stud fit standard cam and rail geometries in conveyor transfer and diverting rollers the 80 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1600 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": [ "automatic assembly machine linkages", "printing press roller followers", "food processing line track rollers", "automotive welding jig positioners" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "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", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "faq": [ { "q": "What are the dimensions of the PWKR-80.2RS?", "a": "PWKR-80.2RS is a sealed full-complement cylindrical-roller cam follower with 80 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 80 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 80x30x100 mm envelope and the 2000 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-80.2RS?", "a": "The published basic dynamic load rating C is 57.2 kN and the basic static load rating C0 is 73.5 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "PWKR", "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": [ "PWKR-80-2RS", "PWKR 80.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 2000, "max_rpm": 2000 }, { "sku": "PWKR-90-2RS", "brand": "SKF", "manufacturer_designation": "PWKR 90.2RS", "series": "PWKR-series", "type": "cam_follower", "d_mm": 30, "D_mm": 90, "B_mm": 100, "material": "GCr15", "seal_type": "open", "clearance": "CN", "tolerance_class": "P0", "cage_type": "steel", "dynamic_load_kN": 62.7, "static_load_kN": 85, "fatigue_load_limit_kN": 10.8, "weight_g": 1950, "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 30 mm stud shank takes the pin or shaft; the 100 mm overall width spreads the Hertzian contact over the outer ring published ratings C 62.7 kN and C0 85 kN already include the bending-stress correction for the unsupported outer ring — the C/C0 ratio of 0.74 is typical for sealed full-complement cylindrical-roller cam follower executions fatigue load limit Pu 10.8 kN at 30 mm stud gives a specific load of 2.09 kN per mm; the limiting speed is 2,000 r/min the 100 mm width carries the load at 0.63 kN per mm of roller complement; section height 30.0 mm between stud and track surface determines the outer-ring bending stiffness mass 1950 g over a 90x100 mm envelope works out to 0.217 g per mm² of projected area — a useful figure when sizing the drive inertia for medium-speed cam duty the 30 mm stud diameter places this in the medium band, where cylindrical-roller full-complement designs become available for heavier radial loads the PWKR..2RS execution combines the maximum load capacity of the double-row full complement with integral sealing — the heaviest and most protected option in the cam follower range 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 30 mm stud fit standard cam and rail geometries in material handling lift and lower tracks the 90 mm outer ring provides the rolling contact while the threaded stud simplifies mounting; the 1950 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 the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load", "applications": [ "automotive welding jig positioners", "woodworking machinery feed rollers", "conveyor transfer and diverting rollers", "cam mechanisms and indexing drives" ], "failure_modes": [ "the sealed twin-row construction is the heaviest cam follower 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", "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "pitfalls": [ "the sealed twin-row construction is the heaviest cam follower — verify the drive can accelerate the mass at the required cam rate", "the integral flanges and seals add width; verify the track channel accommodates the full B dimension plus flange protrusion", "the sealed construction prevents relubrication; the grease fill is sized for the calculated L10 life at the printed speed and load" ], "faq": [ { "q": "What are the dimensions of the PWKR-90.2RS?", "a": "PWKR-90.2RS is a sealed full-complement cylindrical-roller cam follower with 90 mm outside diameter, 30 mm stud shank diameter and 100 mm overall width. The stud is 30 mm and the track contact diameter is 90 mm." }, { "q": "What does the PWKR designation mean?", "a": "The PWKR prefix identifies this as a sealed full-complement cylindrical-roller cam follower. In the SKF catalogue this designation carries the full specification including the 90x30x100 mm envelope and the 2000 r/min limiting speed." }, { "q": "What is the load capacity of PWKR-90.2RS?", "a": "The published basic dynamic load rating C is 62.7 kN and the basic static load rating C0 is 85 kN. These values already include the bending-stress correction for the thick-walled outer ring running on a track." } ], "cross_ref": [ { "equiv_sku": "PWKR", "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": [ "PWKR-90-2RS", "PWKR 90.2RS" ], "locale_variants": {}, "limiting_speed_rpm": 2000, "max_rpm": 2000 } ]