[ { "sku": "22205", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 25, "D_mm": 52, "B_mm": 18, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 150, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22205 encode the bore: code 05 = 25 mm (code × 5 from 04 upward). The ISO 15 envelope is 52 mm outside diameter and 18 mm width — 0.984 × 2.047 × 0.709 in, with a 13.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "light-duty gearbox output shafts", "small conveyor idler and pulley rolls", "light vibrating screens and sifters", "agricultural elevator and feeder shafts", "small industrial fan rotors" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "At 25 mm bore the small 22205 is often delivered sealed (2CS) and grease-filled for life in conveyor idlers — do not add grease nipples to a sealed row; for the open version, keep housing seals effective because the 18 mm cavity holds little oil reserve.", "The 222 medium series at 25 mm bore (52×18 mm, 13.5 mm section) is the default general-purpose spherical row; on the same bore a 22305 is larger and wider with far higher load rating — do not swap a failed 22305 down to a 22205 without re-rating life.", "Check the shoulder geometry for 22205: a generous fillet on the 25 mm shaft looks strong but stops the 18 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 13.5 mm-section outer ring presses flush in the 52 mm housing.", "Large 22205 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 18 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22205, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 25 mm journal must be replaced, or the new bearing frets the same seat.", "Press 22205 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 52 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22205 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 22205 spherical roller bearing?", "a": "A 22205 double-row spherical roller bearing per ISO 15 has a 25 mm bore, 52 mm outer diameter and 18 mm width (0.984 × 2.047 × 0.709 in), a 13.5 mm radial section and roughly 150 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22205 bore code work?", "a": "The leading 2 in 22205 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 05: 05 × 5 = 25 mm. The 52 mm OD and 18 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22205 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22205 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22205 and 22205K?", "a": "The plain 22205 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22205 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22205K", "22205-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22206", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 30, "D_mm": 62, "B_mm": 20, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 236, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22206 encode the bore: code 06 = 30 mm (code × 5 from 04 upward). The ISO 15 envelope is 62 mm outside diameter and 20 mm width — 1.181 × 2.441 × 0.787 in, with a 16.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "small conveyor idler and pulley rolls", "light vibrating screens and sifters", "agricultural elevator and feeder shafts", "small industrial fan rotors", "textile and packaging machinery rolls" ], "failure_modes": [ "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit" ], "pitfalls": [ "At 30 mm bore the small 22206 is often delivered sealed (2CS) and grease-filled for life in conveyor idlers — do not add grease nipples to a sealed row; for the open version, keep housing seals effective because the 20 mm cavity holds little oil reserve.", "The 222 medium series at 30 mm bore (62×20 mm, 16.0 mm section) is the default general-purpose spherical row; on the same bore a 22306 is larger and wider with far higher load rating — do not swap a failed 22306 down to a 22206 without re-rating life.", "The 20 mm-wide 22206 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 30 mm bore and 62 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 16.0 mm section.", "For a cylindrical-bore 22206, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 30 mm shaft; cooling creates the interference, while hammering cold through the 62 mm assembly dents the sphered raceways.", "Relubricate 22206 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 20 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 30 mm bore starved.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22206 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 22206 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 22206 spherical roller bearing?", "a": "A 22206 double-row spherical roller bearing per ISO 15 has a 30 mm bore, 62 mm outer diameter and 20 mm width (1.181 × 2.441 × 0.787 in), a 16.0 mm radial section and roughly 236 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22206 bore code work?", "a": "The leading 2 in 22206 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 06: 06 × 5 = 30 mm. The 62 mm OD and 20 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22206 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22206 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22206 and 22206K?", "a": "The plain 22206 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22206 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22206K", "22206-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22207", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 35, "D_mm": 72, "B_mm": 23, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 365, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22207 encode the bore: code 07 = 35 mm (code × 5 from 04 upward). The ISO 15 envelope is 72 mm outside diameter and 23 mm width — 1.378 × 2.835 × 0.906 in, with a 18.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "light vibrating screens and sifters", "agricultural elevator and feeder shafts", "small industrial fan rotors", "textile and packaging machinery rolls", "light-duty gearbox output shafts" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "At 35 mm bore the small 22207 is often delivered sealed (2CS) and grease-filled for life in conveyor idlers — do not add grease nipples to a sealed row; for the open version, keep housing seals effective because the 23 mm cavity holds little oil reserve.", "The 222 medium series at 35 mm bore (72×23 mm, 18.5 mm section) is the default general-purpose spherical row; on the same bore a 22307 is larger and wider with far higher load rating — do not swap a failed 22307 down to a 22207 without re-rating life.", "Before fitting 22207, machine the 35 mm shaft seat and 72 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 23 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 18.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22207 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 35 mm seat cannot creep.", "Read the damage pattern on a removed 22207: spalling concentrated on one side of the 72 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "In a classic two-bearing arrangement the 22207 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 22207 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 22207 spherical roller bearing?", "a": "A 22207 double-row spherical roller bearing per ISO 15 has a 35 mm bore, 72 mm outer diameter and 23 mm width (1.378 × 2.835 × 0.906 in), a 18.5 mm radial section and roughly 365 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22207 bore code work?", "a": "The leading 2 in 22207 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 07: 07 × 5 = 35 mm. The 72 mm OD and 23 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22207 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22207 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22207 and 22207K?", "a": "The plain 22207 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22207 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22207K", "22207-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22208", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 40, "D_mm": 80, "B_mm": 23, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 442, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22208 encode the bore: code 08 = 40 mm (code × 5 from 04 upward). The ISO 15 envelope is 80 mm outside diameter and 23 mm width — 1.575 × 3.15 × 0.906 in, with a 20.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "On this 40 mm-bore 22208, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 40 mm shaft.", "The 222 medium series at 40 mm bore (80×23 mm, 20.0 mm section) is the default general-purpose spherical row; on the same bore a 22308 is larger and wider with far higher load rating — do not swap a failed 22308 down to a 22208 without re-rating life.", "Check the shoulder geometry for 22208: a generous fillet on the 40 mm shaft looks strong but stops the 23 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 20.0 mm-section outer ring presses flush in the 80 mm housing.", "Large 22208 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 23 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22208, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 40 mm journal must be replaced, or the new bearing frets the same seat.", "Self-aligning is not a licence to ignore alignment: 22208 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22208 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant." ], "faq": [ { "q": "What are the dimensions of a 22208 spherical roller bearing?", "a": "A 22208 double-row spherical roller bearing per ISO 15 has a 40 mm bore, 80 mm outer diameter and 23 mm width (1.575 × 3.15 × 0.906 in), a 20.0 mm radial section and roughly 442 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22208 bore code work?", "a": "The leading 2 in 22208 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 08: 08 × 5 = 40 mm. The 80 mm OD and 23 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22208 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22208 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22208 and 22208K?", "a": "The plain 22208 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22208 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22208K", "22208-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22209", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 45, "D_mm": 85, "B_mm": 23, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 479, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22209 encode the bore: code 09 = 45 mm (code × 5 from 04 upward). The ISO 15 envelope is 85 mm outside diameter and 23 mm width — 1.772 × 3.346 × 0.906 in, with a 20.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "On this 45 mm-bore 22209, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 45 mm shaft.", "The 222 medium series at 45 mm bore (85×23 mm, 20.0 mm section) is the default general-purpose spherical row; on the same bore a 22309 is larger and wider with far higher load rating — do not swap a failed 22309 down to a 22209 without re-rating life.", "The 23 mm-wide 22209 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 45 mm bore and 85 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 20.0 mm section.", "For a cylindrical-bore 22209, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 45 mm shaft; cooling creates the interference, while hammering cold through the 85 mm assembly dents the sphered raceways.", "Relubricate 22209 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 23 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 45 mm bore starved.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22209 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 22209 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 22209 spherical roller bearing?", "a": "A 22209 double-row spherical roller bearing per ISO 15 has a 45 mm bore, 85 mm outer diameter and 23 mm width (1.772 × 3.346 × 0.906 in), a 20.0 mm radial section and roughly 479 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22209 bore code work?", "a": "The leading 2 in 22209 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 09: 09 × 5 = 45 mm. The 85 mm OD and 23 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22209 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22209 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22209 and 22209K?", "a": "The plain 22209 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22209 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22209K", "22209-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22210", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 50, "D_mm": 90, "B_mm": 23, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 516, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22210 encode the bore: code 10 = 50 mm (code × 5 from 04 upward). The ISO 15 envelope is 90 mm outside diameter and 23 mm width — 1.969 × 3.543 × 0.906 in, with a 20.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "On this 50 mm-bore 22210, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 50 mm shaft.", "The 222 medium series at 50 mm bore (90×23 mm, 20.0 mm section) is the default general-purpose spherical row; on the same bore a 22310 is larger and wider with far higher load rating — do not swap a failed 22310 down to a 22210 without re-rating life.", "Before fitting 22210, machine the 50 mm shaft seat and 90 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 23 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 20.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22210 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 50 mm seat cannot creep.", "Read the damage pattern on a removed 22210: spalling concentrated on one side of the 90 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Choose the bore type deliberately: plain 22210 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 50 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 22210 spherical roller bearing?", "a": "A 22210 double-row spherical roller bearing per ISO 15 has a 50 mm bore, 90 mm outer diameter and 23 mm width (1.969 × 3.543 × 0.906 in), a 20.0 mm radial section and roughly 516 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22210 bore code work?", "a": "The leading 2 in 22210 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 10: 10 × 5 = 50 mm. The 90 mm OD and 23 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22210 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22210 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22210 and 22210K?", "a": "The plain 22210 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22210 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22210K", "22210-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22211", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 55, "D_mm": 100, "B_mm": 25, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 699, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22211 encode the bore: code 11 = 55 mm (code × 5 from 04 upward). The ISO 15 envelope is 100 mm outside diameter and 25 mm width — 2.165 × 3.937 × 0.984 in, with a 22.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "On this 55 mm-bore 22211, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 55 mm shaft.", "The 222 medium series at 55 mm bore (100×25 mm, 22.5 mm section) is the default general-purpose spherical row; on the same bore a 22311 is larger and wider with far higher load rating — do not swap a failed 22311 down to a 22211 without re-rating life.", "Check the shoulder geometry for 22211: a generous fillet on the 55 mm shaft looks strong but stops the 25 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 22.5 mm-section outer ring presses flush in the 100 mm housing.", "Large 22211 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 25 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22211, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 55 mm journal must be replaced, or the new bearing frets the same seat.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 55 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 25 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 22211 spherical roller bearing?", "a": "A 22211 double-row spherical roller bearing per ISO 15 has a 55 mm bore, 100 mm outer diameter and 25 mm width (2.165 × 3.937 × 0.984 in), a 22.5 mm radial section and roughly 699 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22211 bore code work?", "a": "The leading 2 in 22211 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 11: 11 × 5 = 55 mm. The 100 mm OD and 25 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22211 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22211 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22211 and 22211K?", "a": "The plain 22211 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22211 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22211K", "22211-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22212", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 60, "D_mm": 110, "B_mm": 28, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 954, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22212 encode the bore: code 12 = 60 mm (code × 5 from 04 upward). The ISO 15 envelope is 110 mm outside diameter and 28 mm width — 2.362 × 4.331 × 1.102 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "On this 60 mm-bore 22212, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 60 mm shaft.", "The 222 medium series at 60 mm bore (110×28 mm, 25.0 mm section) is the default general-purpose spherical row; on the same bore a 22312 is larger and wider with far higher load rating — do not swap a failed 22312 down to a 22212 without re-rating life.", "The 28 mm-wide 22212 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 60 mm bore and 110 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 25.0 mm section.", "For a cylindrical-bore 22212, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 60 mm shaft; cooling creates the interference, while hammering cold through the 110 mm assembly dents the sphered raceways.", "Relubricate 22212 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 28 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 60 mm bore starved.", "Specify W33 when the 28 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 22212 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 110 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 22212 spherical roller bearing?", "a": "A 22212 double-row spherical roller bearing per ISO 15 has a 60 mm bore, 110 mm outer diameter and 28 mm width (2.362 × 4.331 × 1.102 in), a 25.0 mm radial section and roughly 954 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22212 bore code work?", "a": "The leading 2 in 22212 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 12: 12 × 5 = 60 mm. The 110 mm OD and 28 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22212 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22212 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22212 and 22212K?", "a": "The plain 22212 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22212 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22212K", "22212-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22213", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 65, "D_mm": 120, "B_mm": 31, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1264, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22213 encode the bore: code 13 = 65 mm (code × 5 from 04 upward). The ISO 15 envelope is 120 mm outside diameter and 31 mm width — 2.559 × 4.724 × 1.22 in, with a 27.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "On this 65 mm-bore 22213, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 65 mm shaft.", "The 222 medium series at 65 mm bore (120×31 mm, 27.5 mm section) is the default general-purpose spherical row; on the same bore a 22313 is larger and wider with far higher load rating — do not swap a failed 22313 down to a 22213 without re-rating life.", "Before fitting 22213, machine the 65 mm shaft seat and 120 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 31 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 27.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22213 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 65 mm seat cannot creep.", "Read the damage pattern on a removed 22213: spalling concentrated on one side of the 120 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Press 22213 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 120 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22213 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 22213 spherical roller bearing?", "a": "A 22213 double-row spherical roller bearing per ISO 15 has a 65 mm bore, 120 mm outer diameter and 31 mm width (2.559 × 4.724 × 1.22 in), a 27.5 mm radial section and roughly 1264 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22213 bore code work?", "a": "The leading 2 in 22213 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 13: 13 × 5 = 65 mm. The 120 mm OD and 31 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22213 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22213 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22213 and 22213K?", "a": "The plain 22213 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22213 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22213K", "22213-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22214", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 70, "D_mm": 125, "B_mm": 31, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1332, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22214 encode the bore: code 14 = 70 mm (code × 5 from 04 upward). The ISO 15 envelope is 125 mm outside diameter and 31 mm width — 2.756 × 4.921 × 1.22 in, with a 27.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys" ], "failure_modes": [ "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit" ], "pitfalls": [ "On this 70 mm-bore 22214, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 70 mm shaft.", "The 222 medium series at 70 mm bore (125×31 mm, 27.5 mm section) is the default general-purpose spherical row; on the same bore a 22314 is larger and wider with far higher load rating — do not swap a failed 22314 down to a 22214 without re-rating life.", "Check the shoulder geometry for 22214: a generous fillet on the 70 mm shaft looks strong but stops the 31 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 27.5 mm-section outer ring presses flush in the 125 mm housing.", "Large 22214 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 31 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22214, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 70 mm journal must be replaced, or the new bearing frets the same seat.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22214 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 22214 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 22214 spherical roller bearing?", "a": "A 22214 double-row spherical roller bearing per ISO 15 has a 70 mm bore, 125 mm outer diameter and 31 mm width (2.756 × 4.921 × 1.22 in), a 27.5 mm radial section and roughly 1332 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22214 bore code work?", "a": "The leading 2 in 22214 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 14: 14 × 5 = 70 mm. The 125 mm OD and 31 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22214 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22214 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22214 and 22214K?", "a": "The plain 22214 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22214 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22214K", "22214-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22215", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 75, "D_mm": 130, "B_mm": 31, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1401, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22215 encode the bore: code 15 = 75 mm (code × 5 from 04 upward). The ISO 15 envelope is 130 mm outside diameter and 31 mm width — 2.953 × 5.118 × 1.22 in, with a 27.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "On this 75 mm-bore 22215, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 75 mm shaft.", "The 222 medium series at 75 mm bore (130×31 mm, 27.5 mm section) is the default general-purpose spherical row; on the same bore a 22315 is larger and wider with far higher load rating — do not swap a failed 22315 down to a 22215 without re-rating life.", "The 31 mm-wide 22215 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 75 mm bore and 130 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 27.5 mm section.", "For a cylindrical-bore 22215, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 75 mm shaft; cooling creates the interference, while hammering cold through the 130 mm assembly dents the sphered raceways.", "Relubricate 22215 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 31 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 75 mm bore starved.", "In a classic two-bearing arrangement the 22215 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 22215 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 22215 spherical roller bearing?", "a": "A 22215 double-row spherical roller bearing per ISO 15 has a 75 mm bore, 130 mm outer diameter and 31 mm width (2.953 × 5.118 × 1.22 in), a 27.5 mm radial section and roughly 1401 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22215 bore code work?", "a": "The leading 2 in 22215 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 15: 15 × 5 = 75 mm. The 130 mm OD and 31 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22215 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22215 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22215 and 22215K?", "a": "The plain 22215 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22215 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22215K", "22215-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22216", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 80, "D_mm": 140, "B_mm": 33, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1746, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22216 encode the bore: code 16 = 80 mm (code × 5 from 04 upward). The ISO 15 envelope is 140 mm outside diameter and 33 mm width — 3.15 × 5.512 × 1.299 in, with a 30.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "The large 80 mm-bore 22216 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 33 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 80 mm bore (140×33 mm, 30.0 mm section) is the default general-purpose spherical row; on the same bore a 22316 is larger and wider with far higher load rating — do not swap a failed 22316 down to a 22216 without re-rating life.", "Before fitting 22216, machine the 80 mm shaft seat and 140 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 33 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 30.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22216 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 80 mm seat cannot creep.", "Read the damage pattern on a removed 22216: spalling concentrated on one side of the 140 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Self-aligning is not a licence to ignore alignment: 22216 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22216 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant." ], "faq": [ { "q": "What are the dimensions of a 22216 spherical roller bearing?", "a": "A 22216 double-row spherical roller bearing per ISO 15 has a 80 mm bore, 140 mm outer diameter and 33 mm width (3.15 × 5.512 × 1.299 in), a 30.0 mm radial section and roughly 1746 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22216 bore code work?", "a": "The leading 2 in 22216 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 16: 16 × 5 = 80 mm. The 140 mm OD and 33 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22216 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22216 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22216 and 22216K?", "a": "The plain 22216 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22216 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22216K", "22216-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22217", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 85, "D_mm": 150, "B_mm": 36, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 2204, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22217 encode the bore: code 17 = 85 mm (code × 5 from 04 upward). The ISO 15 envelope is 150 mm outside diameter and 36 mm width — 3.346 × 5.906 × 1.417 in, with a 32.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 85 mm-bore 22217 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 36 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 85 mm bore (150×36 mm, 32.5 mm section) is the default general-purpose spherical row; on the same bore a 22317 is larger and wider with far higher load rating — do not swap a failed 22317 down to a 22217 without re-rating life.", "Check the shoulder geometry for 22217: a generous fillet on the 85 mm shaft looks strong but stops the 36 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 32.5 mm-section outer ring presses flush in the 150 mm housing.", "Large 22217 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 36 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22217, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 85 mm journal must be replaced, or the new bearing frets the same seat.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22217 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 22217 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 22217 spherical roller bearing?", "a": "A 22217 double-row spherical roller bearing per ISO 15 has a 85 mm bore, 150 mm outer diameter and 36 mm width (3.346 × 5.906 × 1.417 in), a 32.5 mm radial section and roughly 2204 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22217 bore code work?", "a": "The leading 2 in 22217 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 17: 17 × 5 = 85 mm. The 150 mm OD and 36 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22217 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22217 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22217 and 22217K?", "a": "The plain 22217 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22217 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22217K", "22217-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22218", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 90, "D_mm": 160, "B_mm": 40, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 2805, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22218 encode the bore: code 18 = 90 mm (code × 5 from 04 upward). The ISO 15 envelope is 160 mm outside diameter and 40 mm width — 3.543 × 6.299 × 1.575 in, with a 35.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "The large 90 mm-bore 22218 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 40 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 90 mm bore (160×40 mm, 35.0 mm section) is the default general-purpose spherical row; on the same bore a 22318 is larger and wider with far higher load rating — do not swap a failed 22318 down to a 22218 without re-rating life.", "The 40 mm-wide 22218 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 90 mm bore and 160 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 35.0 mm section.", "For a cylindrical-bore 22218, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 90 mm shaft; cooling creates the interference, while hammering cold through the 160 mm assembly dents the sphered raceways.", "Relubricate 22218 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 40 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 90 mm bore starved.", "Choose the bore type deliberately: plain 22218 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 90 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 22218 spherical roller bearing?", "a": "A 22218 double-row spherical roller bearing per ISO 15 has a 90 mm bore, 160 mm outer diameter and 40 mm width (3.543 × 6.299 × 1.575 in), a 35.0 mm radial section and roughly 2805 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22218 bore code work?", "a": "The leading 2 in 22218 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 18: 18 × 5 = 90 mm. The 160 mm OD and 40 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22218 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22218 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22218 and 22218K?", "a": "The plain 22218 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22218 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22218K", "22218-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22219", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 95, "D_mm": 170, "B_mm": 43, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 3425, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22219 encode the bore: code 19 = 95 mm (code × 5 from 04 upward). The ISO 15 envelope is 170 mm outside diameter and 43 mm width — 3.74 × 6.693 × 1.693 in, with a 37.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "The large 95 mm-bore 22219 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 43 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 95 mm bore (170×43 mm, 37.5 mm section) is the default general-purpose spherical row; on the same bore a 22319 is larger and wider with far higher load rating — do not swap a failed 22319 down to a 22219 without re-rating life.", "Before fitting 22219, machine the 95 mm shaft seat and 170 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 43 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 37.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22219 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 95 mm seat cannot creep.", "Read the damage pattern on a removed 22219: spalling concentrated on one side of the 170 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 95 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 43 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 22219 spherical roller bearing?", "a": "A 22219 double-row spherical roller bearing per ISO 15 has a 95 mm bore, 170 mm outer diameter and 43 mm width (3.74 × 6.693 × 1.693 in), a 37.5 mm radial section and roughly 3425 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22219 bore code work?", "a": "The leading 2 in 22219 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 19: 19 × 5 = 95 mm. The 170 mm OD and 43 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22219 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22219 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22219 and 22219K?", "a": "The plain 22219 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22219 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22219K", "22219-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22220", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 100, "D_mm": 180, "B_mm": 46, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 4129, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22220 encode the bore: code 20 = 100 mm (code × 5 from 04 upward). The ISO 15 envelope is 180 mm outside diameter and 46 mm width — 3.937 × 7.087 × 1.811 in, with a 40.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "The large 100 mm-bore 22220 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 46 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 100 mm bore (180×46 mm, 40.0 mm section) is the default general-purpose spherical row; on the same bore a 22320 is larger and wider with far higher load rating — do not swap a failed 22320 down to a 22220 without re-rating life.", "Check the shoulder geometry for 22220: a generous fillet on the 100 mm shaft looks strong but stops the 46 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 40.0 mm-section outer ring presses flush in the 180 mm housing.", "Large 22220 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 46 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22220, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 100 mm journal must be replaced, or the new bearing frets the same seat.", "Specify W33 when the 46 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 22220 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 180 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 22220 spherical roller bearing?", "a": "A 22220 double-row spherical roller bearing per ISO 15 has a 100 mm bore, 180 mm outer diameter and 46 mm width (3.937 × 7.087 × 1.811 in), a 40.0 mm radial section and roughly 4129 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22220 bore code work?", "a": "The leading 2 in 22220 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 20: 20 × 5 = 100 mm. The 180 mm OD and 46 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22220 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22220 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22220 and 22220K?", "a": "The plain 22220 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22220 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22220K", "22220-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22222", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 110, "D_mm": 200, "B_mm": 53, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 5926, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22222 encode the bore: code 22 = 110 mm (code × 5 from 04 upward). The ISO 15 envelope is 200 mm outside diameter and 53 mm width — 4.331 × 7.874 × 2.087 in, with a 45.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit" ], "pitfalls": [ "The large 110 mm-bore 22222 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 53 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 110 mm bore (200×53 mm, 45.0 mm section) is the default general-purpose spherical row; on the same bore a 22322 is larger and wider with far higher load rating — do not swap a failed 22322 down to a 22222 without re-rating life.", "Before fitting 22222, machine the 110 mm shaft seat and 200 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 53 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 45.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22222 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 110 mm seat cannot creep.", "Read the damage pattern on a removed 22222: spalling concentrated on one side of the 200 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22222 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 22222 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 22222 spherical roller bearing?", "a": "A 22222 double-row spherical roller bearing per ISO 15 has a 110 mm bore, 200 mm outer diameter and 53 mm width (4.331 × 7.874 × 2.087 in), a 45.0 mm radial section and roughly 5926 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22222 bore code work?", "a": "The leading 2 in 22222 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 22: 22 × 5 = 110 mm. The 200 mm OD and 53 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22222 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22222 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22222 and 22222K?", "a": "The plain 22222 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22222 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22222K", "22222-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22224", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 120, "D_mm": 215, "B_mm": 58, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 7397, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22224 encode the bore: code 24 = 120 mm (code × 5 from 04 upward). The ISO 15 envelope is 215 mm outside diameter and 58 mm width — 4.724 × 8.465 × 2.283 in, with a 47.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "The large 120 mm-bore 22224 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 58 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 120 mm bore (215×58 mm, 47.5 mm section) is the default general-purpose spherical row; on the same bore a 22324 is larger and wider with far higher load rating — do not swap a failed 22324 down to a 22224 without re-rating life.", "The 58 mm-wide 22224 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 120 mm bore and 215 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 47.5 mm section.", "For a cylindrical-bore 22224, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 120 mm shaft; cooling creates the interference, while hammering cold through the 215 mm assembly dents the sphered raceways.", "Relubricate 22224 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 58 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 120 mm bore starved.", "Self-aligning is not a licence to ignore alignment: 22224 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22224 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant." ], "faq": [ { "q": "What are the dimensions of a 22224 spherical roller bearing?", "a": "A 22224 double-row spherical roller bearing per ISO 15 has a 120 mm bore, 215 mm outer diameter and 58 mm width (4.724 × 8.465 × 2.283 in), a 47.5 mm radial section and roughly 7397 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22224 bore code work?", "a": "The leading 2 in 22224 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 24: 24 × 5 = 120 mm. The 215 mm OD and 58 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22224 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22224 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22224 and 22224K?", "a": "The plain 22224 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22224 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22224K", "22224-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22226", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 130, "D_mm": 230, "B_mm": 64, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 9233, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22226 encode the bore: code 26 = 130 mm (code × 5 from 04 upward). The ISO 15 envelope is 230 mm outside diameter and 64 mm width — 5.118 × 9.055 × 2.52 in, with a 50.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "The large 130 mm-bore 22226 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 64 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 130 mm bore (230×64 mm, 50.0 mm section) is the default general-purpose spherical row; on the same bore a 22326 is larger and wider with far higher load rating — do not swap a failed 22326 down to a 22226 without re-rating life.", "Check the shoulder geometry for 22226: a generous fillet on the 130 mm shaft looks strong but stops the 64 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 50.0 mm-section outer ring presses flush in the 230 mm housing.", "Large 22226 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 64 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22226, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 130 mm journal must be replaced, or the new bearing frets the same seat.", "Choose the bore type deliberately: plain 22226 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 130 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 22226 spherical roller bearing?", "a": "A 22226 double-row spherical roller bearing per ISO 15 has a 130 mm bore, 230 mm outer diameter and 64 mm width (5.118 × 9.055 × 2.52 in), a 50.0 mm radial section and roughly 9233 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22226 bore code work?", "a": "The leading 2 in 22226 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 26: 26 × 5 = 130 mm. The 230 mm OD and 64 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22226 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22226 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22226 and 22226K?", "a": "The plain 22226 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22226 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22226K", "22226-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22228", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 140, "D_mm": 250, "B_mm": 68, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 11691, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22228 encode the bore: code 28 = 140 mm (code × 5 from 04 upward). The ISO 15 envelope is 250 mm outside diameter and 68 mm width — 5.512 × 9.843 × 2.677 in, with a 55.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "The large 140 mm-bore 22228 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 68 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 140 mm bore (250×68 mm, 55.0 mm section) is the default general-purpose spherical row; on the same bore a 22328 is larger and wider with far higher load rating — do not swap a failed 22328 down to a 22228 without re-rating life.", "Before fitting 22228, machine the 140 mm shaft seat and 250 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 68 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 55.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22228 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 140 mm seat cannot creep.", "Read the damage pattern on a removed 22228: spalling concentrated on one side of the 250 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Specify W33 when the 68 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 22228 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 250 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 22228 spherical roller bearing?", "a": "A 22228 double-row spherical roller bearing per ISO 15 has a 140 mm bore, 250 mm outer diameter and 68 mm width (5.512 × 9.843 × 2.677 in), a 55.0 mm radial section and roughly 11691 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22228 bore code work?", "a": "The leading 2 in 22228 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 28: 28 × 5 = 140 mm. The 250 mm OD and 68 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22228 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22228 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22228 and 22228K?", "a": "The plain 22228 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22228 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22228K", "22228-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22230", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 150, "D_mm": 270, "B_mm": 73, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 14744, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22230 encode the bore: code 30 = 150 mm (code × 5 from 04 upward). The ISO 15 envelope is 270 mm outside diameter and 73 mm width — 5.906 × 10.63 × 2.874 in, with a 60.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit" ], "pitfalls": [ "The large 150 mm-bore 22230 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 73 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 150 mm bore (270×73 mm, 60.0 mm section) is the default general-purpose spherical row; on the same bore a 22330 is larger and wider with far higher load rating — do not swap a failed 22330 down to a 22230 without re-rating life.", "The 73 mm-wide 22230 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 150 mm bore and 270 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 60.0 mm section.", "For a cylindrical-bore 22230, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 150 mm shaft; cooling creates the interference, while hammering cold through the 270 mm assembly dents the sphered raceways.", "Relubricate 22230 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 73 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 150 mm bore starved.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22230 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 22230 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 22230 spherical roller bearing?", "a": "A 22230 double-row spherical roller bearing per ISO 15 has a 150 mm bore, 270 mm outer diameter and 73 mm width (5.906 × 10.63 × 2.874 in), a 60.0 mm radial section and roughly 14744 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22230 bore code work?", "a": "The leading 2 in 22230 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 30: 30 × 5 = 150 mm. The 270 mm OD and 73 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22230 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22230 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22230 and 22230K?", "a": "The plain 22230 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22230 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22230K", "22230-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22232", "brand": "GENERIC-ISO", "series": "22200-series", "type": "spherical_roller", "d_mm": 160, "D_mm": 290, "B_mm": 80, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 18755, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22232 encode the bore: code 32 = 160 mm (code × 5 from 04 upward). The ISO 15 envelope is 290 mm outside diameter and 80 mm width — 6.299 × 11.417 × 3.15 in, with a 65.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "The large 160 mm-bore 22232 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 80 mm double-row assembly cannot be drifted into position without brinelling.", "The 222 medium series at 160 mm bore (290×80 mm, 65.0 mm section) is the default general-purpose spherical row; on the same bore a 22332 is larger and wider with far higher load rating — do not swap a failed 22332 down to a 22232 without re-rating life.", "Check the shoulder geometry for 22232: a generous fillet on the 160 mm shaft looks strong but stops the 80 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 65.0 mm-section outer ring presses flush in the 290 mm housing.", "Large 22232 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 80 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 22232, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 160 mm journal must be replaced, or the new bearing frets the same seat.", "Self-aligning is not a licence to ignore alignment: 22232 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22232 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant." ], "faq": [ { "q": "What are the dimensions of a 22232 spherical roller bearing?", "a": "A 22232 double-row spherical roller bearing per ISO 15 has a 160 mm bore, 290 mm outer diameter and 80 mm width (6.299 × 11.417 × 3.15 in), a 65.0 mm radial section and roughly 18755 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22232 bore code work?", "a": "The leading 2 in 22232 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 32: 32 × 5 = 160 mm. The 290 mm OD and 80 mm width come from the dimension series (22200), not from the bore code alone." }, { "q": "How much misalignment can a 22232 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22232 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22232 and 22232K?", "a": "The plain 22232 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22232 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22232K", "22232-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22308", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 40, "D_mm": 90, "B_mm": 33, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 860, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22308 encode the bore: code 08 = 40 mm (code × 5 from 04 upward). The ISO 15 envelope is 90 mm outside diameter and 33 mm width — 1.575 × 3.543 × 1.299 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "On this 40 mm-bore 22308, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 40 mm shaft.", "The 223 heavy wide series at 40 mm bore (90×33 mm) is selected for shock and high radial load in screens and crushers; its 25.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22208 on the same journal.", "Check the shoulder geometry for 22308: a generous fillet on the 40 mm shaft looks strong but stops the 33 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 25.0 mm-section outer ring presses flush in the 90 mm housing.", "Large 22308 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 33 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Relubricate 22308 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 33 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 40 mm bore starved.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22308 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 22308 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 22308 spherical roller bearing?", "a": "A 22308 double-row spherical roller bearing per ISO 15 has a 40 mm bore, 90 mm outer diameter and 33 mm width (1.575 × 3.543 × 1.299 in), a 25.0 mm radial section and roughly 860 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22308 bore code work?", "a": "The leading 2 in 22308 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 08: 08 × 5 = 40 mm. The 90 mm OD and 33 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22308 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22308 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22308 and 22308K?", "a": "The plain 22308 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22308 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22308K", "22308-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22309", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 45, "D_mm": 100, "B_mm": 36, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1151, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22309 encode the bore: code 09 = 45 mm (code × 5 from 04 upward). The ISO 15 envelope is 100 mm outside diameter and 36 mm width — 1.772 × 3.937 × 1.417 in, with a 27.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "On this 45 mm-bore 22309, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 45 mm shaft.", "The 223 heavy wide series at 45 mm bore (100×36 mm) is selected for shock and high radial load in screens and crushers; its 27.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22209 on the same journal.", "The 36 mm-wide 22309 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 45 mm bore and 100 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 27.5 mm section.", "For a cylindrical-bore 22309, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 45 mm shaft; cooling creates the interference, while hammering cold through the 100 mm assembly dents the sphered raceways.", "Read the damage pattern on a removed 22309: spalling concentrated on one side of the 100 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Choose the bore type deliberately: plain 22309 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 45 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 22309 spherical roller bearing?", "a": "A 22309 double-row spherical roller bearing per ISO 15 has a 45 mm bore, 100 mm outer diameter and 36 mm width (1.772 × 3.937 × 1.417 in), a 27.5 mm radial section and roughly 1151 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22309 bore code work?", "a": "The leading 2 in 22309 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 09: 09 × 5 = 45 mm. The 100 mm OD and 36 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22309 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22309 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22309 and 22309K?", "a": "The plain 22309 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22309 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22309K", "22309-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22310", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 50, "D_mm": 110, "B_mm": 40, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1539, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22310 encode the bore: code 10 = 50 mm (code × 5 from 04 upward). The ISO 15 envelope is 110 mm outside diameter and 40 mm width — 1.969 × 4.331 × 1.575 in, with a 30.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "On this 50 mm-bore 22310, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 50 mm shaft.", "The 223 heavy wide series at 50 mm bore (110×40 mm) is selected for shock and high radial load in screens and crushers; its 30.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22210 on the same journal.", "Before fitting 22310, machine the 50 mm shaft seat and 110 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 40 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 30.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22310 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 50 mm seat cannot creep.", "When reusing a sleeve-mounted 22310, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 50 mm journal must be replaced, or the new bearing frets the same seat.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 50 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 40 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 22310 spherical roller bearing?", "a": "A 22310 double-row spherical roller bearing per ISO 15 has a 50 mm bore, 110 mm outer diameter and 40 mm width (1.969 × 4.331 × 1.575 in), a 30.0 mm radial section and roughly 1539 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22310 bore code work?", "a": "The leading 2 in 22310 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 10: 10 × 5 = 50 mm. The 110 mm OD and 40 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22310 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22310 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22310 and 22310K?", "a": "The plain 22310 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22310 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22310K", "22310-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22311", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 55, "D_mm": 120, "B_mm": 43, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1960, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22311 encode the bore: code 11 = 55 mm (code × 5 from 04 upward). The ISO 15 envelope is 120 mm outside diameter and 43 mm width — 2.165 × 4.724 × 1.693 in, with a 32.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels" ], "failure_modes": [ "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit" ], "pitfalls": [ "On this 55 mm-bore 22311, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 55 mm shaft.", "The 223 heavy wide series at 55 mm bore (120×43 mm) is selected for shock and high radial load in screens and crushers; its 32.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22211 on the same journal.", "Check the shoulder geometry for 22311: a generous fillet on the 55 mm shaft looks strong but stops the 43 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 32.5 mm-section outer ring presses flush in the 120 mm housing.", "Large 22311 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 43 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Relubricate 22311 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 43 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 55 mm bore starved.", "Specify W33 when the 43 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 22311 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 120 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 22311 spherical roller bearing?", "a": "A 22311 double-row spherical roller bearing per ISO 15 has a 55 mm bore, 120 mm outer diameter and 43 mm width (2.165 × 4.724 × 1.693 in), a 32.5 mm radial section and roughly 1960 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22311 bore code work?", "a": "The leading 2 in 22311 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 11: 11 × 5 = 55 mm. The 120 mm OD and 43 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22311 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22311 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22311 and 22311K?", "a": "The plain 22311 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22311 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22311K", "22311-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22312", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 60, "D_mm": 130, "B_mm": 46, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 2452, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22312 encode the bore: code 12 = 60 mm (code × 5 from 04 upward). The ISO 15 envelope is 130 mm outside diameter and 46 mm width — 2.362 × 5.118 × 1.811 in, with a 35.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "On this 60 mm-bore 22312, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 60 mm shaft.", "The 223 heavy wide series at 60 mm bore (130×46 mm) is selected for shock and high radial load in screens and crushers; its 35.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22212 on the same journal.", "The 46 mm-wide 22312 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 60 mm bore and 130 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 35.0 mm section.", "For a cylindrical-bore 22312, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 60 mm shaft; cooling creates the interference, while hammering cold through the 130 mm assembly dents the sphered raceways.", "Read the damage pattern on a removed 22312: spalling concentrated on one side of the 130 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Press 22312 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 130 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22312 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 22312 spherical roller bearing?", "a": "A 22312 double-row spherical roller bearing per ISO 15 has a 60 mm bore, 130 mm outer diameter and 46 mm width (2.362 × 5.118 × 1.811 in), a 35.0 mm radial section and roughly 2452 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22312 bore code work?", "a": "The leading 2 in 22312 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 12: 12 × 5 = 60 mm. The 130 mm OD and 46 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22312 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22312 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22312 and 22312K?", "a": "The plain 22312 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22312 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22312K", "22312-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22313", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 65, "D_mm": 140, "B_mm": 48, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 2958, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22313 encode the bore: code 13 = 65 mm (code × 5 from 04 upward). The ISO 15 envelope is 140 mm outside diameter and 48 mm width — 2.559 × 5.512 × 1.89 in, with a 37.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "On this 65 mm-bore 22313, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 65 mm shaft.", "The 223 heavy wide series at 65 mm bore (140×48 mm) is selected for shock and high radial load in screens and crushers; its 37.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22213 on the same journal.", "Before fitting 22313, machine the 65 mm shaft seat and 140 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 48 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 37.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22313 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 65 mm seat cannot creep.", "When reusing a sleeve-mounted 22313, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 65 mm journal must be replaced, or the new bearing frets the same seat.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22313 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 22313 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 22313 spherical roller bearing?", "a": "A 22313 double-row spherical roller bearing per ISO 15 has a 65 mm bore, 140 mm outer diameter and 48 mm width (2.559 × 5.512 × 1.89 in), a 37.5 mm radial section and roughly 2958 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22313 bore code work?", "a": "The leading 2 in 22313 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 13: 13 × 5 = 65 mm. The 140 mm OD and 48 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22313 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22313 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22313 and 22313K?", "a": "The plain 22313 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22313 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22313K", "22313-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22314", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 70, "D_mm": 150, "B_mm": 51, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 3597, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22314 encode the bore: code 14 = 70 mm (code × 5 from 04 upward). The ISO 15 envelope is 150 mm outside diameter and 51 mm width — 2.756 × 5.906 × 2.008 in, with a 40.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "On this 70 mm-bore 22314, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 70 mm shaft.", "The 223 heavy wide series at 70 mm bore (150×51 mm) is selected for shock and high radial load in screens and crushers; its 40.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22214 on the same journal.", "Check the shoulder geometry for 22314: a generous fillet on the 70 mm shaft looks strong but stops the 51 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 40.0 mm-section outer ring presses flush in the 150 mm housing.", "Large 22314 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 51 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Relubricate 22314 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 51 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 70 mm bore starved.", "In a classic two-bearing arrangement the 22314 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 22314 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 22314 spherical roller bearing?", "a": "A 22314 double-row spherical roller bearing per ISO 15 has a 70 mm bore, 150 mm outer diameter and 51 mm width (2.756 × 5.906 × 2.008 in), a 40.0 mm radial section and roughly 3597 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22314 bore code work?", "a": "The leading 2 in 22314 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 14: 14 × 5 = 70 mm. The 150 mm OD and 51 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22314 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22314 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22314 and 22314K?", "a": "The plain 22314 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22314 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22314K", "22314-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22315", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 75, "D_mm": 160, "B_mm": 55, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 4403, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22315 encode the bore: code 15 = 75 mm (code × 5 from 04 upward). The ISO 15 envelope is 160 mm outside diameter and 55 mm width — 2.953 × 6.299 × 2.165 in, with a 42.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "On this 75 mm-bore 22315, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 75 mm shaft.", "The 223 heavy wide series at 75 mm bore (160×55 mm) is selected for shock and high radial load in screens and crushers; its 42.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22215 on the same journal.", "The 55 mm-wide 22315 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 75 mm bore and 160 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 42.5 mm section.", "For a cylindrical-bore 22315, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 75 mm shaft; cooling creates the interference, while hammering cold through the 160 mm assembly dents the sphered raceways.", "Read the damage pattern on a removed 22315: spalling concentrated on one side of the 160 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Self-aligning is not a licence to ignore alignment: 22315 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22315 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant." ], "faq": [ { "q": "What are the dimensions of a 22315 spherical roller bearing?", "a": "A 22315 double-row spherical roller bearing per ISO 15 has a 75 mm bore, 160 mm outer diameter and 55 mm width (2.953 × 6.299 × 2.165 in), a 42.5 mm radial section and roughly 4403 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22315 bore code work?", "a": "The leading 2 in 22315 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 15: 15 × 5 = 75 mm. The 160 mm OD and 55 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22315 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22315 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22315 and 22315K?", "a": "The plain 22315 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22315 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22315K", "22315-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22316", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 80, "D_mm": 170, "B_mm": 58, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 5230, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22316 encode the bore: code 16 = 80 mm (code × 5 from 04 upward). The ISO 15 envelope is 170 mm outside diameter and 58 mm width — 3.15 × 6.693 × 2.283 in, with a 45.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "The large 80 mm-bore 22316 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 58 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 80 mm bore (170×58 mm) is selected for shock and high radial load in screens and crushers; its 45.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22216 on the same journal.", "Before fitting 22316, machine the 80 mm shaft seat and 170 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 58 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 45.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22316 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 80 mm seat cannot creep.", "When reusing a sleeve-mounted 22316, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 80 mm journal must be replaced, or the new bearing frets the same seat.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22316 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 22316 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 22316 spherical roller bearing?", "a": "A 22316 double-row spherical roller bearing per ISO 15 has a 80 mm bore, 170 mm outer diameter and 58 mm width (3.15 × 6.693 × 2.283 in), a 45.0 mm radial section and roughly 5230 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22316 bore code work?", "a": "The leading 2 in 22316 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 16: 16 × 5 = 80 mm. The 170 mm OD and 58 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22316 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22316 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22316 and 22316K?", "a": "The plain 22316 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22316 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22316K", "22316-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22317", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 85, "D_mm": 180, "B_mm": 60, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 6053, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22317 encode the bore: code 17 = 85 mm (code × 5 from 04 upward). The ISO 15 envelope is 180 mm outside diameter and 60 mm width — 3.346 × 7.087 × 2.362 in, with a 47.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "The large 85 mm-bore 22317 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 60 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 85 mm bore (180×60 mm) is selected for shock and high radial load in screens and crushers; its 47.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22217 on the same journal.", "Check the shoulder geometry for 22317: a generous fillet on the 85 mm shaft looks strong but stops the 60 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 47.5 mm-section outer ring presses flush in the 180 mm housing.", "Large 22317 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 60 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Relubricate 22317 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 60 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 85 mm bore starved.", "Choose the bore type deliberately: plain 22317 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 85 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 22317 spherical roller bearing?", "a": "A 22317 double-row spherical roller bearing per ISO 15 has a 85 mm bore, 180 mm outer diameter and 60 mm width (3.346 × 7.087 × 2.362 in), a 47.5 mm radial section and roughly 6053 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22317 bore code work?", "a": "The leading 2 in 22317 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 17: 17 × 5 = 85 mm. The 180 mm OD and 60 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22317 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22317 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22317 and 22317K?", "a": "The plain 22317 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22317 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22317K", "22317-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22318", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 90, "D_mm": 190, "B_mm": 64, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 7181, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22318 encode the bore: code 18 = 90 mm (code × 5 from 04 upward). The ISO 15 envelope is 190 mm outside diameter and 64 mm width — 3.543 × 7.48 × 2.52 in, with a 50.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 90 mm-bore 22318 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 64 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 90 mm bore (190×64 mm) is selected for shock and high radial load in screens and crushers; its 50.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22218 on the same journal.", "The 64 mm-wide 22318 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 90 mm bore and 190 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 50.0 mm section.", "For a cylindrical-bore 22318, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 90 mm shaft; cooling creates the interference, while hammering cold through the 190 mm assembly dents the sphered raceways.", "Read the damage pattern on a removed 22318: spalling concentrated on one side of the 190 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 90 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 64 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 22318 spherical roller bearing?", "a": "A 22318 double-row spherical roller bearing per ISO 15 has a 90 mm bore, 190 mm outer diameter and 64 mm width (3.543 × 7.48 × 2.52 in), a 50.0 mm radial section and roughly 7181 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22318 bore code work?", "a": "The leading 2 in 22318 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 18: 18 × 5 = 90 mm. The 190 mm OD and 64 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22318 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22318 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22318 and 22318K?", "a": "The plain 22318 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22318 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22318K", "22318-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22319", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 95, "D_mm": 200, "B_mm": 67, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 8317, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22319 encode the bore: code 19 = 95 mm (code × 5 from 04 upward). The ISO 15 envelope is 200 mm outside diameter and 67 mm width — 3.74 × 7.874 × 2.638 in, with a 52.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts" ], "failure_modes": [ "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit" ], "pitfalls": [ "The large 95 mm-bore 22319 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 67 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 95 mm bore (200×67 mm) is selected for shock and high radial load in screens and crushers; its 52.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22219 on the same journal.", "Before fitting 22319, machine the 95 mm shaft seat and 200 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 67 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 52.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22319 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 95 mm seat cannot creep.", "When reusing a sleeve-mounted 22319, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 95 mm journal must be replaced, or the new bearing frets the same seat.", "Specify W33 when the 67 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 22319 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 200 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 22319 spherical roller bearing?", "a": "A 22319 double-row spherical roller bearing per ISO 15 has a 95 mm bore, 200 mm outer diameter and 67 mm width (3.74 × 7.874 × 2.638 in), a 52.5 mm radial section and roughly 8317 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22319 bore code work?", "a": "The leading 2 in 22319 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 19: 19 × 5 = 95 mm. The 200 mm OD and 67 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22319 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22319 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22319 and 22319K?", "a": "The plain 22319 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22319 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22319K", "22319-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22320", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 100, "D_mm": 215, "B_mm": 73, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 10598, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22320 encode the bore: code 20 = 100 mm (code × 5 from 04 upward). The ISO 15 envelope is 215 mm outside diameter and 73 mm width — 3.937 × 8.465 × 2.874 in, with a 57.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "The large 100 mm-bore 22320 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 73 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 100 mm bore (215×73 mm) is selected for shock and high radial load in screens and crushers; its 57.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22220 on the same journal.", "Check the shoulder geometry for 22320: a generous fillet on the 100 mm shaft looks strong but stops the 73 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 57.5 mm-section outer ring presses flush in the 215 mm housing.", "Large 22320 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 73 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Relubricate 22320 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 73 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 100 mm bore starved.", "Press 22320 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 215 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22320 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 22320 spherical roller bearing?", "a": "A 22320 double-row spherical roller bearing per ISO 15 has a 100 mm bore, 215 mm outer diameter and 73 mm width (3.937 × 8.465 × 2.874 in), a 57.5 mm radial section and roughly 10598 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22320 bore code work?", "a": "The leading 2 in 22320 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 20: 20 × 5 = 100 mm. The 215 mm OD and 73 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22320 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22320 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22320 and 22320K?", "a": "The plain 22320 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22320 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22320K", "22320-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22322", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 110, "D_mm": 240, "B_mm": 80, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 14587, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22322 encode the bore: code 22 = 110 mm (code × 5 from 04 upward). The ISO 15 envelope is 240 mm outside diameter and 80 mm width — 4.331 × 9.449 × 3.15 in, with a 65.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 110 mm-bore 22322 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 80 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 110 mm bore (240×80 mm) is selected for shock and high radial load in screens and crushers; its 65.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22222 on the same journal.", "Before fitting 22322, machine the 110 mm shaft seat and 240 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 80 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 65.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22322 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 110 mm seat cannot creep.", "When reusing a sleeve-mounted 22322, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 110 mm journal must be replaced, or the new bearing frets the same seat.", "In a classic two-bearing arrangement the 22322 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 22322 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 22322 spherical roller bearing?", "a": "A 22322 double-row spherical roller bearing per ISO 15 has a 110 mm bore, 240 mm outer diameter and 80 mm width (4.331 × 9.449 × 3.15 in), a 65.0 mm radial section and roughly 14587 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22322 bore code work?", "a": "The leading 2 in 22322 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 22: 22 × 5 = 110 mm. The 240 mm OD and 80 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22322 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22322 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22322 and 22322K?", "a": "The plain 22322 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22322 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22322K", "22322-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22324", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 120, "D_mm": 260, "B_mm": 86, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 18335, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22324 encode the bore: code 24 = 120 mm (code × 5 from 04 upward). The ISO 15 envelope is 260 mm outside diameter and 86 mm width — 4.724 × 10.236 × 3.386 in, with a 70.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "The large 120 mm-bore 22324 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 86 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 120 mm bore (260×86 mm) is selected for shock and high radial load in screens and crushers; its 70.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22224 on the same journal.", "The 86 mm-wide 22324 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 120 mm bore and 260 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 70.0 mm section.", "For a cylindrical-bore 22324, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 120 mm shaft; cooling creates the interference, while hammering cold through the 260 mm assembly dents the sphered raceways.", "Read the damage pattern on a removed 22324: spalling concentrated on one side of the 260 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 22324 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 22324 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 22324 spherical roller bearing?", "a": "A 22324 double-row spherical roller bearing per ISO 15 has a 120 mm bore, 260 mm outer diameter and 86 mm width (4.724 × 10.236 × 3.386 in), a 70.0 mm radial section and roughly 18335 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22324 bore code work?", "a": "The leading 2 in 22324 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 24: 24 × 5 = 120 mm. The 260 mm OD and 86 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22324 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22324 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22324 and 22324K?", "a": "The plain 22324 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22324 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22324K", "22324-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22326", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 130, "D_mm": 280, "B_mm": 93, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 22921, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22326 encode the bore: code 26 = 130 mm (code × 5 from 04 upward). The ISO 15 envelope is 280 mm outside diameter and 93 mm width — 5.118 × 11.024 × 3.661 in, with a 75.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 130 mm-bore 22326 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 93 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 130 mm bore (280×93 mm) is selected for shock and high radial load in screens and crushers; its 75.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22226 on the same journal.", "Check the shoulder geometry for 22326: a generous fillet on the 130 mm shaft looks strong but stops the 93 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 75.0 mm-section outer ring presses flush in the 280 mm housing.", "Large 22326 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 93 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Relubricate 22326 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 93 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 130 mm bore starved.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 130 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 93 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 22326 spherical roller bearing?", "a": "A 22326 double-row spherical roller bearing per ISO 15 has a 130 mm bore, 280 mm outer diameter and 93 mm width (5.118 × 11.024 × 3.661 in), a 75.0 mm radial section and roughly 22921 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22326 bore code work?", "a": "The leading 2 in 22326 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 26: 26 × 5 = 130 mm. The 280 mm OD and 93 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22326 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22326 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22326 and 22326K?", "a": "The plain 22326 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22326 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22326K", "22326-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22328", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 140, "D_mm": 300, "B_mm": 102, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 28777, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22328 encode the bore: code 28 = 140 mm (code × 5 from 04 upward). The ISO 15 envelope is 300 mm outside diameter and 102 mm width — 5.512 × 11.811 × 4.016 in, with a 80.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "The large 140 mm-bore 22328 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 102 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 140 mm bore (300×102 mm) is selected for shock and high radial load in screens and crushers; its 80.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22228 on the same journal.", "Before fitting 22328, machine the 140 mm shaft seat and 300 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 102 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 80.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22328 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 140 mm seat cannot creep.", "When reusing a sleeve-mounted 22328, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 140 mm journal must be replaced, or the new bearing frets the same seat.", "Press 22328 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 300 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22328 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 22328 spherical roller bearing?", "a": "A 22328 double-row spherical roller bearing per ISO 15 has a 140 mm bore, 300 mm outer diameter and 102 mm width (5.512 × 11.811 × 4.016 in), a 80.0 mm radial section and roughly 28777 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22328 bore code work?", "a": "The leading 2 in 22328 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 28: 28 × 5 = 140 mm. The 300 mm OD and 102 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22328 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22328 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22328 and 22328K?", "a": "The plain 22328 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22328 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22328K", "22328-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "22330", "brand": "GENERIC-ISO", "series": "22300-series", "type": "spherical_roller", "d_mm": 150, "D_mm": 320, "B_mm": 108, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 34581, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22330 encode the bore: code 30 = 150 mm (code × 5 from 04 upward). The ISO 15 envelope is 320 mm outside diameter and 108 mm width — 5.906 × 12.598 × 4.252 in, with a 85.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 150 mm-bore 22330 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 108 mm double-row assembly cannot be drifted into position without brinelling.", "The 223 heavy wide series at 150 mm bore (320×108 mm) is selected for shock and high radial load in screens and crushers; its 85.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22230 on the same journal.", "The 108 mm-wide 22330 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 150 mm bore and 320 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 85.0 mm section.", "For a cylindrical-bore 22330, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 150 mm shaft; cooling creates the interference, while hammering cold through the 320 mm assembly dents the sphered raceways.", "Read the damage pattern on a removed 22330: spalling concentrated on one side of the 320 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "In a classic two-bearing arrangement the 22330 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 22330 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 22330 spherical roller bearing?", "a": "A 22330 double-row spherical roller bearing per ISO 15 has a 150 mm bore, 320 mm outer diameter and 108 mm width (5.906 × 12.598 × 4.252 in), a 85.0 mm radial section and roughly 34581 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 22330 bore code work?", "a": "The leading 2 in 22330 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 30: 30 × 5 = 150 mm. The 320 mm OD and 108 mm width come from the dimension series (22300), not from the bore code alone." }, { "q": "How much misalignment can a 22330 accommodate?", "a": "Thanks to the sphered outer ring raceway, 22330 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 22330 and 22330K?", "a": "The plain 22330 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 22330 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "22330K", "22330-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21310", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 50, "D_mm": 110, "B_mm": 27, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1039, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21310 encode the bore: code 10 = 50 mm (code × 5 from 04 upward). The ISO 15 envelope is 110 mm outside diameter and 27 mm width — 1.969 × 4.331 × 1.063 in, with a 30.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "On this 50 mm-bore 21310, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 50 mm shaft.", "The 213 series at 50 mm bore keeps the 27 mm width comparatively narrow for its 110 mm OD; it fits restricted axial space but carries less load than a 22310, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Before fitting 21310, machine the 50 mm shaft seat and 110 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 27 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 30.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 21310 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 50 mm seat cannot creep.", "Relubricate 21310 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 27 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 50 mm bore starved.", "Specify W33 when the 27 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 21310 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 110 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 21310 spherical roller bearing?", "a": "A 21310 double-row spherical roller bearing per ISO 15 has a 50 mm bore, 110 mm outer diameter and 27 mm width (1.969 × 4.331 × 1.063 in), a 30.0 mm radial section and roughly 1039 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21310 bore code work?", "a": "The leading 2 in 21310 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 10: 10 × 5 = 50 mm. The 110 mm OD and 27 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21310 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21310 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21310 and 21310K?", "a": "The plain 21310 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21310 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6310-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6310", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6310-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6310-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21310K", "21310-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21311", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 55, "D_mm": 120, "B_mm": 29, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1322, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21311 encode the bore: code 11 = 55 mm (code × 5 from 04 upward). The ISO 15 envelope is 120 mm outside diameter and 29 mm width — 2.165 × 4.724 × 1.142 in, with a 32.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "On this 55 mm-bore 21311, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 55 mm shaft.", "The 213 series at 55 mm bore keeps the 29 mm width comparatively narrow for its 120 mm OD; it fits restricted axial space but carries less load than a 22311, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Check the shoulder geometry for 21311: a generous fillet on the 55 mm shaft looks strong but stops the 29 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 32.5 mm-section outer ring presses flush in the 120 mm housing.", "Large 21311 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 29 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Read the damage pattern on a removed 21311: spalling concentrated on one side of the 120 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Press 21311 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 120 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 21311 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 21311 spherical roller bearing?", "a": "A 21311 double-row spherical roller bearing per ISO 15 has a 55 mm bore, 120 mm outer diameter and 29 mm width (2.165 × 4.724 × 1.142 in), a 32.5 mm radial section and roughly 1322 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21311 bore code work?", "a": "The leading 2 in 21311 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 11: 11 × 5 = 55 mm. The 120 mm OD and 29 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21311 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21311 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21311 and 21311K?", "a": "The plain 21311 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21311 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6311-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6311", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6311-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6311-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21311K", "21311-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21312", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 60, "D_mm": 130, "B_mm": 31, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1652, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21312 encode the bore: code 12 = 60 mm (code × 5 from 04 upward). The ISO 15 envelope is 130 mm outside diameter and 31 mm width — 2.362 × 5.118 × 1.22 in, with a 35.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "On this 60 mm-bore 21312, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 60 mm shaft.", "The 213 series at 60 mm bore keeps the 31 mm width comparatively narrow for its 130 mm OD; it fits restricted axial space but carries less load than a 22312, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "The 31 mm-wide 21312 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 60 mm bore and 130 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 35.0 mm section.", "For a cylindrical-bore 21312, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 60 mm shaft; cooling creates the interference, while hammering cold through the 130 mm assembly dents the sphered raceways.", "When reusing a sleeve-mounted 21312, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 60 mm journal must be replaced, or the new bearing frets the same seat.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 21312 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 21312 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 21312 spherical roller bearing?", "a": "A 21312 double-row spherical roller bearing per ISO 15 has a 60 mm bore, 130 mm outer diameter and 31 mm width (2.362 × 5.118 × 1.22 in), a 35.0 mm radial section and roughly 1652 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21312 bore code work?", "a": "The leading 2 in 21312 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 12: 12 × 5 = 60 mm. The 130 mm OD and 31 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21312 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21312 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21312 and 21312K?", "a": "The plain 21312 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21312 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6312-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6312", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6312-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6312-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21312K", "21312-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21313", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 65, "D_mm": 140, "B_mm": 33, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 2033, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21313 encode the bore: code 13 = 65 mm (code × 5 from 04 upward). The ISO 15 envelope is 140 mm outside diameter and 33 mm width — 2.559 × 5.512 × 1.299 in, with a 37.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "On this 65 mm-bore 21313, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 65 mm shaft.", "The 213 series at 65 mm bore keeps the 33 mm width comparatively narrow for its 140 mm OD; it fits restricted axial space but carries less load than a 22313, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Before fitting 21313, machine the 65 mm shaft seat and 140 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 33 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 37.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 21313 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 65 mm seat cannot creep.", "Relubricate 21313 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 33 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 65 mm bore starved.", "In a classic two-bearing arrangement the 21313 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 21313 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 21313 spherical roller bearing?", "a": "A 21313 double-row spherical roller bearing per ISO 15 has a 65 mm bore, 140 mm outer diameter and 33 mm width (2.559 × 5.512 × 1.299 in), a 37.5 mm radial section and roughly 2033 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21313 bore code work?", "a": "The leading 2 in 21313 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 13: 13 × 5 = 65 mm. The 140 mm OD and 33 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21313 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21313 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21313 and 21313K?", "a": "The plain 21313 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21313 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6313-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6313", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6313-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6313-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21313K", "21313-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21314", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 70, "D_mm": 150, "B_mm": 35, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 2469, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21314 encode the bore: code 14 = 70 mm (code × 5 from 04 upward). The ISO 15 envelope is 150 mm outside diameter and 35 mm width — 2.756 × 5.906 × 1.378 in, with a 40.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "On this 70 mm-bore 21314, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 70 mm shaft.", "The 213 series at 70 mm bore keeps the 35 mm width comparatively narrow for its 150 mm OD; it fits restricted axial space but carries less load than a 22314, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Check the shoulder geometry for 21314: a generous fillet on the 70 mm shaft looks strong but stops the 35 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 40.0 mm-section outer ring presses flush in the 150 mm housing.", "Large 21314 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 35 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Read the damage pattern on a removed 21314: spalling concentrated on one side of the 150 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Self-aligning is not a licence to ignore alignment: 21314 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 21314 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant." ], "faq": [ { "q": "What are the dimensions of a 21314 spherical roller bearing?", "a": "A 21314 double-row spherical roller bearing per ISO 15 has a 70 mm bore, 150 mm outer diameter and 35 mm width (2.756 × 5.906 × 1.378 in), a 40.0 mm radial section and roughly 2469 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21314 bore code work?", "a": "The leading 2 in 21314 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 14: 14 × 5 = 70 mm. The 150 mm OD and 35 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21314 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21314 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21314 and 21314K?", "a": "The plain 21314 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21314 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6314-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6314", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6314-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6314-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21314K", "21314-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21315", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 75, "D_mm": 160, "B_mm": 37, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 2962, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21315 encode the bore: code 15 = 75 mm (code × 5 from 04 upward). The ISO 15 envelope is 160 mm outside diameter and 37 mm width — 2.953 × 6.299 × 1.457 in, with a 42.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "vibrating screens, feeders and shakeout machines", "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "On this 75 mm-bore 21315, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 75 mm shaft.", "The 213 series at 75 mm bore keeps the 37 mm width comparatively narrow for its 160 mm OD; it fits restricted axial space but carries less load than a 22315, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "The 37 mm-wide 21315 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 75 mm bore and 160 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 42.5 mm section.", "For a cylindrical-bore 21315, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 75 mm shaft; cooling creates the interference, while hammering cold through the 160 mm assembly dents the sphered raceways.", "When reusing a sleeve-mounted 21315, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 75 mm journal must be replaced, or the new bearing frets the same seat.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 21315 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 21315 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 21315 spherical roller bearing?", "a": "A 21315 double-row spherical roller bearing per ISO 15 has a 75 mm bore, 160 mm outer diameter and 37 mm width (2.953 × 6.299 × 1.457 in), a 42.5 mm radial section and roughly 2962 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21315 bore code work?", "a": "The leading 2 in 21315 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 15: 15 × 5 = 75 mm. The 160 mm OD and 37 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21315 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21315 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21315 and 21315K?", "a": "The plain 21315 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21315 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6315-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6315", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6315-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6315-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21315K", "21315-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21316", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 80, "D_mm": 170, "B_mm": 39, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 3517, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21316 encode the bore: code 16 = 80 mm (code × 5 from 04 upward). The ISO 15 envelope is 170 mm outside diameter and 39 mm width — 3.15 × 6.693 × 1.535 in, with a 45.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit" ], "pitfalls": [ "The large 80 mm-bore 21316 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 39 mm double-row assembly cannot be drifted into position without brinelling.", "The 213 series at 80 mm bore keeps the 39 mm width comparatively narrow for its 170 mm OD; it fits restricted axial space but carries less load than a 22316, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Before fitting 21316, machine the 80 mm shaft seat and 170 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 39 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 45.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 21316 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 80 mm seat cannot creep.", "Relubricate 21316 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 39 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 80 mm bore starved.", "Choose the bore type deliberately: plain 21316 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 80 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 21316 spherical roller bearing?", "a": "A 21316 double-row spherical roller bearing per ISO 15 has a 80 mm bore, 170 mm outer diameter and 39 mm width (3.15 × 6.693 × 1.535 in), a 45.0 mm radial section and roughly 3517 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21316 bore code work?", "a": "The leading 2 in 21316 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 16: 16 × 5 = 80 mm. The 170 mm OD and 39 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21316 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21316 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21316 and 21316K?", "a": "The plain 21316 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21316 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6316-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6316", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6316-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6316-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21316K", "21316-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21317", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 85, "D_mm": 180, "B_mm": 41, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 4136, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21317 encode the bore: code 17 = 85 mm (code × 5 from 04 upward). The ISO 15 envelope is 180 mm outside diameter and 41 mm width — 3.346 × 7.087 × 1.614 in, with a 47.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "The large 85 mm-bore 21317 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 41 mm double-row assembly cannot be drifted into position without brinelling.", "The 213 series at 85 mm bore keeps the 41 mm width comparatively narrow for its 180 mm OD; it fits restricted axial space but carries less load than a 22317, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Check the shoulder geometry for 21317: a generous fillet on the 85 mm shaft looks strong but stops the 41 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 47.5 mm-section outer ring presses flush in the 180 mm housing.", "Large 21317 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 41 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Read the damage pattern on a removed 21317: spalling concentrated on one side of the 180 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 85 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 41 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 21317 spherical roller bearing?", "a": "A 21317 double-row spherical roller bearing per ISO 15 has a 85 mm bore, 180 mm outer diameter and 41 mm width (3.346 × 7.087 × 1.614 in), a 47.5 mm radial section and roughly 4136 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21317 bore code work?", "a": "The leading 2 in 21317 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 17: 17 × 5 = 85 mm. The 180 mm OD and 41 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21317 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21317 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21317 and 21317K?", "a": "The plain 21317 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21317 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6317-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6317", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6317-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6317-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21317K", "21317-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21318", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 90, "D_mm": 190, "B_mm": 43, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 4825, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21318 encode the bore: code 18 = 90 mm (code × 5 from 04 upward). The ISO 15 envelope is 190 mm outside diameter and 43 mm width — 3.543 × 7.48 × 1.693 in, with a 50.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "The large 90 mm-bore 21318 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 43 mm double-row assembly cannot be drifted into position without brinelling.", "The 213 series at 90 mm bore keeps the 43 mm width comparatively narrow for its 190 mm OD; it fits restricted axial space but carries less load than a 22318, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "The 43 mm-wide 21318 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 90 mm bore and 190 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 50.0 mm section.", "For a cylindrical-bore 21318, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 90 mm shaft; cooling creates the interference, while hammering cold through the 190 mm assembly dents the sphered raceways.", "When reusing a sleeve-mounted 21318, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 90 mm journal must be replaced, or the new bearing frets the same seat.", "Specify W33 when the 43 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 21318 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 190 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 21318 spherical roller bearing?", "a": "A 21318 double-row spherical roller bearing per ISO 15 has a 90 mm bore, 190 mm outer diameter and 43 mm width (3.543 × 7.48 × 1.693 in), a 50.0 mm radial section and roughly 4825 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21318 bore code work?", "a": "The leading 2 in 21318 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 18: 18 × 5 = 90 mm. The 190 mm OD and 43 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21318 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21318 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21318 and 21318K?", "a": "The plain 21318 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21318 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6318-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6318", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6318-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6318-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21318K", "21318-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21319", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 95, "D_mm": 200, "B_mm": 45, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 5586, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21319 encode the bore: code 19 = 95 mm (code × 5 from 04 upward). The ISO 15 envelope is 200 mm outside diameter and 45 mm width — 3.74 × 7.874 × 1.772 in, with a 52.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 95 mm-bore 21319 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 45 mm double-row assembly cannot be drifted into position without brinelling.", "The 213 series at 95 mm bore keeps the 45 mm width comparatively narrow for its 200 mm OD; it fits restricted axial space but carries less load than a 22319, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Before fitting 21319, machine the 95 mm shaft seat and 200 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 45 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 52.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 21319 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 95 mm seat cannot creep.", "Relubricate 21319 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 45 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 95 mm bore starved.", "Press 21319 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 200 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 21319 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 21319 spherical roller bearing?", "a": "A 21319 double-row spherical roller bearing per ISO 15 has a 95 mm bore, 200 mm outer diameter and 45 mm width (3.74 × 7.874 × 1.772 in), a 52.5 mm radial section and roughly 5586 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21319 bore code work?", "a": "The leading 2 in 21319 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 19: 19 × 5 = 95 mm. The 200 mm OD and 45 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21319 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21319 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21319 and 21319K?", "a": "The plain 21319 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21319 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6319-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6319", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6319-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6319-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21319K", "21319-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21320", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 100, "D_mm": 215, "B_mm": 47, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 6823, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21320 encode the bore: code 20 = 100 mm (code × 5 from 04 upward). The ISO 15 envelope is 215 mm outside diameter and 47 mm width — 3.937 × 8.465 × 1.85 in, with a 57.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "The large 100 mm-bore 21320 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 47 mm double-row assembly cannot be drifted into position without brinelling.", "The 213 series at 100 mm bore keeps the 47 mm width comparatively narrow for its 215 mm OD; it fits restricted axial space but carries less load than a 22320, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Check the shoulder geometry for 21320: a generous fillet on the 100 mm shaft looks strong but stops the 47 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 57.5 mm-section outer ring presses flush in the 215 mm housing.", "Large 21320 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 47 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "Read the damage pattern on a removed 21320: spalling concentrated on one side of the 215 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 21320 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 21320 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 21320 spherical roller bearing?", "a": "A 21320 double-row spherical roller bearing per ISO 15 has a 100 mm bore, 215 mm outer diameter and 47 mm width (3.937 × 8.465 × 1.85 in), a 57.5 mm radial section and roughly 6823 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21320 bore code work?", "a": "The leading 2 in 21320 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 20: 20 × 5 = 100 mm. The 215 mm OD and 47 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21320 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21320 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21320 and 21320K?", "a": "The plain 21320 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21320 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6320", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6320-RSR", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6320-2RS", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6320-ZZ", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21320K", "21320-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "21322", "brand": "GENERIC-ISO", "series": "21300-series", "type": "spherical_roller", "d_mm": 110, "D_mm": 240, "B_mm": 50, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 9117, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 21300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 21322 encode the bore: code 22 = 110 mm (code × 5 from 04 upward). The ISO 15 envelope is 240 mm outside diameter and 50 mm width — 4.331 × 9.449 × 1.969 in, with a 65.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "The large 110 mm-bore 21322 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 50 mm double-row assembly cannot be drifted into position without brinelling.", "The 213 series at 110 mm bore keeps the 50 mm width comparatively narrow for its 240 mm OD; it fits restricted axial space but carries less load than a 22322, so substitution into heavy 223 duty — even at identical bore and OD — will shorten life.", "Before fitting 21322, machine the 110 mm shaft seat and 240 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 50 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 65.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 21322 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 110 mm seat cannot creep.", "Relubricate 21322 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 50 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 110 mm bore starved.", "Self-aligning is not a licence to ignore alignment: 21322 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 21322 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant." ], "faq": [ { "q": "What are the dimensions of a 21322 spherical roller bearing?", "a": "A 21322 double-row spherical roller bearing per ISO 15 has a 110 mm bore, 240 mm outer diameter and 50 mm width (4.331 × 9.449 × 1.969 in), a 65.0 mm radial section and roughly 9117 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 21322 bore code work?", "a": "The leading 2 in 21322 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 22: 22 × 5 = 110 mm. The 240 mm OD and 50 mm width come from the dimension series (21300), not from the bore code alone." }, { "q": "How much misalignment can a 21322 accommodate?", "a": "Thanks to the sphered outer ring raceway, 21322 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 21322 and 21322K?", "a": "The plain 21322 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 21322 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [ { "equiv_sku": "6322-ZZ", "equiv_brand": "NSK", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." }, { "equiv_sku": "6322", "equiv_brand": "SKF", "level": "verify", "note": "Identical envelope but a different bearing type — confirm load and speed suitability before substitution." } ], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "21322K", "21322-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23014", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 70, "D_mm": 110, "B_mm": 27, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 779, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23014 encode the bore: code 14 = 70 mm (code × 5 from 04 upward). The ISO 15 envelope is 110 mm outside diameter and 27 mm width — 2.756 × 4.331 × 1.063 in, with a 20.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine felt and press rolls", "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "On this 70 mm-bore 23014, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 70 mm shaft.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (110 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 20.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Thermal soak matters on this 70 mm-bore row: a 110 mm housing heating faster than the shaft closes the 20.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 27 mm assembly.", "Check the shoulder geometry for 23014: a generous fillet on the 70 mm shaft looks strong but stops the 27 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 20.0 mm-section outer ring presses flush in the 110 mm housing.", "Large 23014 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 27 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23014, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 70 mm journal must be replaced, or the new bearing frets the same seat.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 23014 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 23014 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 23014 spherical roller bearing?", "a": "A 23014 double-row spherical roller bearing per ISO 15 has a 70 mm bore, 110 mm outer diameter and 27 mm width (2.756 × 4.331 × 1.063 in), a 20.0 mm radial section and roughly 779 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23014 bore code work?", "a": "The leading 2 in 23014 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 14: 14 × 5 = 70 mm. The 110 mm OD and 27 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23014 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23014 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23014 and 23014K?", "a": "The plain 23014 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23014 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23014K", "23014-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23015", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 75, "D_mm": 115, "B_mm": 30, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 914, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23015 encode the bore: code 15 = 75 mm (code × 5 from 04 upward). The ISO 15 envelope is 115 mm outside diameter and 30 mm width — 2.953 × 4.528 × 1.181 in, with a 20.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "industrial gearbox and drive shafts", "elevator winches and hoist drums", "process crane travel wheels", "conveyor head and tail pulleys", "vibrating screens, feeders and shakeout machines" ], "failure_modes": [ "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime" ], "pitfalls": [ "On this 75 mm-bore 23015, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 75 mm shaft.", "The 230 series (ISO 15 dimension series 30) pairs a wide 30 mm section with a compact 115 mm OD at 75 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Housing stiffness governs the 23015: with the load carried on a 115 mm OD but only a 20.0 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 30 mm width.", "The 30 mm-wide 23015 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 75 mm bore and 115 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 20.0 mm section.", "For a cylindrical-bore 23015, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 75 mm shaft; cooling creates the interference, while hammering cold through the 115 mm assembly dents the sphered raceways.", "Relubricate 23015 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 30 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 75 mm bore starved.", "Choose the bore type deliberately: plain 23015 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 75 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class." ], "faq": [ { "q": "What are the dimensions of a 23015 spherical roller bearing?", "a": "A 23015 double-row spherical roller bearing per ISO 15 has a 75 mm bore, 115 mm outer diameter and 30 mm width (2.953 × 4.528 × 1.181 in), a 20.0 mm radial section and roughly 914 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23015 bore code work?", "a": "The leading 2 in 23015 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 15: 15 × 5 = 75 mm. The 115 mm OD and 30 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23015 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23015 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23015 and 23015K?", "a": "The plain 23015 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23015 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23015K", "23015-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23016", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 80, "D_mm": 125, "B_mm": 35, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1294, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23016 encode the bore: code 16 = 80 mm (code × 5 from 04 upward). The ISO 15 envelope is 125 mm outside diameter and 35 mm width — 3.15 × 4.921 × 1.378 in, with a 22.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 80 mm-bore 23016 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 35 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 80 mm bore the 23016 gives a 125×35 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Drive-up a sleeve-mounted 23016 on residual clearance, not feel: the 80 mm K taper pulls the wide 35 mm inner ring up quickly, and every 0.01 mm of radial clearance removed is real preload on a 22.5 mm section — measure with feeler gauges at the unloaded roller row before locking the KM nut.", "Before fitting 23016, machine the 80 mm shaft seat and 125 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 35 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 22.5 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23016 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 80 mm seat cannot creep.", "Read the damage pattern on a removed 23016: spalling concentrated on one side of the 125 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 80 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 35 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23016 spherical roller bearing?", "a": "A 23016 double-row spherical roller bearing per ISO 15 has a 80 mm bore, 125 mm outer diameter and 35 mm width (3.15 × 4.921 × 1.378 in), a 22.5 mm radial section and roughly 1294 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23016 bore code work?", "a": "The leading 2 in 23016 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 16: 16 × 5 = 80 mm. The 125 mm OD and 35 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23016 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23016 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23016 and 23016K?", "a": "The plain 23016 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23016 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23016K", "23016-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23017", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 85, "D_mm": 130, "B_mm": 36, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1396, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23017 encode the bore: code 17 = 85 mm (code × 5 from 04 upward). The ISO 15 envelope is 130 mm outside diameter and 36 mm width — 3.346 × 5.118 × 1.417 in, with a 22.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions" ], "failure_modes": [ "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely" ], "pitfalls": [ "The large 85 mm-bore 23017 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 36 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (130 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 22.5 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Grease life on the 23017 is set by the slow, dirty regime it usually works in: relubricate through the W33 groove until old grease flushes clear of the full 36 mm-wide double row, because the 22.5 mm section gives contamination little room to fall away from the 130 mm raceway on its own.", "Check the shoulder geometry for 23017: a generous fillet on the 85 mm shaft looks strong but stops the 36 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 22.5 mm-section outer ring presses flush in the 130 mm housing.", "Large 23017 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 36 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23017, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 85 mm journal must be replaced, or the new bearing frets the same seat.", "Specify W33 when the 36 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.", "Press 23017 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 130 mm assembly." ], "faq": [ { "q": "What are the dimensions of a 23017 spherical roller bearing?", "a": "A 23017 double-row spherical roller bearing per ISO 15 has a 85 mm bore, 130 mm outer diameter and 36 mm width (3.346 × 5.118 × 1.417 in), a 22.5 mm radial section and roughly 1396 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23017 bore code work?", "a": "The leading 2 in 23017 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 17: 17 × 5 = 85 mm. The 130 mm OD and 36 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23017 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23017 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23017 and 23017K?", "a": "The plain 23017 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23017 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23017K", "23017-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23018", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 90, "D_mm": 140, "B_mm": 37, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1705, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23018 encode the bore: code 18 = 90 mm (code × 5 from 04 upward). The ISO 15 envelope is 140 mm outside diameter and 37 mm width — 3.543 × 5.512 × 1.457 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "The large 90 mm-bore 23018 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 37 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series (ISO 15 dimension series 30) pairs a wide 37 mm section with a compact 140 mm OD at 90 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Check shaft deflection across the 23018 span: the wide 37 mm section tolerates some misalignment through the sphered raceway, but a bent shaft between two 230-series rows alternates the load path every revolution and frets both 90 mm seats — align to the catalogue angular limit under load, not at standstill.", "The 37 mm-wide 23018 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 90 mm bore and 140 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 25.0 mm section.", "For a cylindrical-bore 23018, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 90 mm shaft; cooling creates the interference, while hammering cold through the 140 mm assembly dents the sphered raceways.", "Relubricate 23018 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 37 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 90 mm bore starved.", "Press 23018 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 140 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 23018 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 23018 spherical roller bearing?", "a": "A 23018 double-row spherical roller bearing per ISO 15 has a 90 mm bore, 140 mm outer diameter and 37 mm width (3.543 × 5.512 × 1.457 in), a 25.0 mm radial section and roughly 1705 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23018 bore code work?", "a": "The leading 2 in 23018 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 18: 18 × 5 = 90 mm. The 140 mm OD and 37 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23018 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23018 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23018 and 23018K?", "a": "The plain 23018 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23018 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23018K", "23018-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23019", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 95, "D_mm": 145, "B_mm": 35, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1683, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23019 encode the bore: code 19 = 95 mm (code × 5 from 04 upward). The ISO 15 envelope is 145 mm outside diameter and 35 mm width — 3.74 × 5.709 × 1.378 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery" ], "failure_modes": [ "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty" ], "pitfalls": [ "The large 95 mm-bore 23019 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 35 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 95 mm bore the 23019 gives a 145×35 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Thermal soak matters on this 95 mm-bore row: a 145 mm housing heating faster than the shaft closes the 25.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 35 mm assembly.", "Before fitting 23019, machine the 95 mm shaft seat and 145 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 35 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 25.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23019 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 95 mm seat cannot creep.", "Read the damage pattern on a removed 23019: spalling concentrated on one side of the 145 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 23019 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.", "In a classic two-bearing arrangement the 23019 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row." ], "faq": [ { "q": "What are the dimensions of a 23019 spherical roller bearing?", "a": "A 23019 double-row spherical roller bearing per ISO 15 has a 95 mm bore, 145 mm outer diameter and 35 mm width (3.74 × 5.709 × 1.378 in), a 25.0 mm radial section and roughly 1683 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23019 bore code work?", "a": "The leading 2 in 23019 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 19: 19 × 5 = 95 mm. The 145 mm OD and 35 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23019 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23019 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23019 and 23019K?", "a": "The plain 23019 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23019 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23019K", "23019-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23020", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 100, "D_mm": 150, "B_mm": 37, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 1853, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23020 encode the bore: code 20 = 100 mm (code × 5 from 04 upward). The ISO 15 envelope is 150 mm outside diameter and 37 mm width — 3.937 × 5.906 × 1.457 in, with a 25.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a k5 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 100 mm-bore 23020 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 37 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (150 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 25.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Housing stiffness governs the 23020: with the load carried on a 150 mm OD but only a 25.0 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 37 mm width.", "Check the shoulder geometry for 23020: a generous fillet on the 100 mm shaft looks strong but stops the 37 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 25.0 mm-section outer ring presses flush in the 150 mm housing.", "Large 23020 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 37 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23020, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 100 mm journal must be replaced, or the new bearing frets the same seat.", "In a classic two-bearing arrangement the 23020 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 23020 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 23020 spherical roller bearing?", "a": "A 23020 double-row spherical roller bearing per ISO 15 has a 100 mm bore, 150 mm outer diameter and 37 mm width (3.937 × 5.906 × 1.457 in), a 25.0 mm radial section and roughly 1853 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23020 bore code work?", "a": "The leading 2 in 23020 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 20: 20 × 5 = 100 mm. The 150 mm OD and 37 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23020 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23020 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23020 and 23020K?", "a": "The plain 23020 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23020 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23020K", "23020-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23022", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 110, "D_mm": 170, "B_mm": 45, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 3030, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23022 encode the bore: code 22 = 110 mm (code × 5 from 04 upward). The ISO 15 envelope is 170 mm outside diameter and 45 mm width — 4.331 × 6.693 × 1.772 in, with a 30.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "The large 110 mm-bore 23022 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 45 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 110 mm bore the 23022 gives a 170×45 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Grease life on the 23022 is set by the slow, dirty regime it usually works in: relubricate through the W33 groove until old grease flushes clear of the full 45 mm-wide double row, because the 30.0 mm section gives contamination little room to fall away from the 170 mm raceway on its own.", "Before fitting 23022, machine the 110 mm shaft seat and 170 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 45 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 30.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23022 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 110 mm seat cannot creep.", "Read the damage pattern on a removed 23022: spalling concentrated on one side of the 170 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 23022 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 23022 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 23022 spherical roller bearing?", "a": "A 23022 double-row spherical roller bearing per ISO 15 has a 110 mm bore, 170 mm outer diameter and 45 mm width (4.331 × 6.693 × 1.772 in), a 30.0 mm radial section and roughly 3030 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23022 bore code work?", "a": "The leading 2 in 23022 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 22: 22 × 5 = 110 mm. The 170 mm OD and 45 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23022 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23022 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23022 and 23022K?", "a": "The plain 23022 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23022 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23022K", "23022-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23024", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 120, "D_mm": 180, "B_mm": 46, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 3318, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23024 encode the bore: code 24 = 120 mm (code × 5 from 04 upward). The ISO 15 envelope is 180 mm outside diameter and 46 mm width — 4.724 × 7.087 × 1.811 in, with a 30.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 120 mm-bore 23024 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 46 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series (ISO 15 dimension series 30) pairs a wide 46 mm section with a compact 180 mm OD at 120 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Thermal soak matters on this 120 mm-bore row: a 180 mm housing heating faster than the shaft closes the 30.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 46 mm assembly.", "The 46 mm-wide 23024 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 120 mm bore and 180 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 30.0 mm section.", "For a cylindrical-bore 23024, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 120 mm shaft; cooling creates the interference, while hammering cold through the 180 mm assembly dents the sphered raceways.", "Relubricate 23024 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 46 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 120 mm bore starved.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 120 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 46 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23024 spherical roller bearing?", "a": "A 23024 double-row spherical roller bearing per ISO 15 has a 120 mm bore, 180 mm outer diameter and 46 mm width (4.724 × 7.087 × 1.811 in), a 30.0 mm radial section and roughly 3318 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23024 bore code work?", "a": "The leading 2 in 23024 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 24: 24 × 5 = 120 mm. The 180 mm OD and 46 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23024 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23024 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23024 and 23024K?", "a": "The plain 23024 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23024 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23024K", "23024-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23026", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 130, "D_mm": 200, "B_mm": 52, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 4814, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23026 encode the bore: code 26 = 130 mm (code × 5 from 04 upward). The ISO 15 envelope is 200 mm outside diameter and 52 mm width — 5.118 × 7.874 × 2.047 in, with a 35.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "The large 130 mm-bore 23026 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 52 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (200 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 35.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Drive-up a sleeve-mounted 23026 on residual clearance, not feel: the 130 mm K taper pulls the wide 52 mm inner ring up quickly, and every 0.01 mm of radial clearance removed is real preload on a 35.0 mm section — measure with feeler gauges at the unloaded roller row before locking the KM nut.", "Check the shoulder geometry for 23026: a generous fillet on the 130 mm shaft looks strong but stops the 52 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 35.0 mm-section outer ring presses flush in the 200 mm housing.", "Large 23026 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 52 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23026, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 130 mm journal must be replaced, or the new bearing frets the same seat.", "Press 23026 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 200 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 23026 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 23026 spherical roller bearing?", "a": "A 23026 double-row spherical roller bearing per ISO 15 has a 130 mm bore, 200 mm outer diameter and 52 mm width (5.118 × 7.874 × 2.047 in), a 35.0 mm radial section and roughly 4814 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23026 bore code work?", "a": "The leading 2 in 23026 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 26: 26 × 5 = 130 mm. The 200 mm OD and 52 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23026 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23026 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23026 and 23026K?", "a": "The plain 23026 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23026 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23026K", "23026-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23028", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 140, "D_mm": 210, "B_mm": 53, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 5204, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23028 encode the bore: code 28 = 140 mm (code × 5 from 04 upward). The ISO 15 envelope is 210 mm outside diameter and 53 mm width — 5.512 × 8.268 × 2.087 in, with a 35.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 140 mm-bore 23028 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 53 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 140 mm bore the 23028 gives a 210×53 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Check shaft deflection across the 23028 span: the wide 53 mm section tolerates some misalignment through the sphered raceway, but a bent shaft between two 230-series rows alternates the load path every revolution and frets both 140 mm seats — align to the catalogue angular limit under load, not at standstill.", "Before fitting 23028, machine the 140 mm shaft seat and 210 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 53 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 35.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23028 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 140 mm seat cannot creep.", "Read the damage pattern on a removed 23028: spalling concentrated on one side of the 210 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "In a classic two-bearing arrangement the 23028 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 23028 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 23028 spherical roller bearing?", "a": "A 23028 double-row spherical roller bearing per ISO 15 has a 140 mm bore, 210 mm outer diameter and 53 mm width (5.512 × 8.268 × 2.087 in), a 35.0 mm radial section and roughly 5204 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23028 bore code work?", "a": "The leading 2 in 23028 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 28: 28 × 5 = 140 mm. The 210 mm OD and 53 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23028 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23028 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23028 and 23028K?", "a": "The plain 23028 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23028 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23028K", "23028-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23030", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 150, "D_mm": 225, "B_mm": 56, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 6312, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23030 encode the bore: code 30 = 150 mm (code × 5 from 04 upward). The ISO 15 envelope is 225 mm outside diameter and 56 mm width — 5.906 × 8.858 × 2.205 in, with a 37.5 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "The large 150 mm-bore 23030 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 56 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series (ISO 15 dimension series 30) pairs a wide 56 mm section with a compact 225 mm OD at 150 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Housing stiffness governs the 23030: with the load carried on a 225 mm OD but only a 37.5 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 56 mm width.", "The 56 mm-wide 23030 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 150 mm bore and 225 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 37.5 mm section.", "For a cylindrical-bore 23030, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 150 mm shaft; cooling creates the interference, while hammering cold through the 225 mm assembly dents the sphered raceways.", "Relubricate 23030 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 56 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 150 mm bore starved.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 23030 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 23030 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 23030 spherical roller bearing?", "a": "A 23030 double-row spherical roller bearing per ISO 15 has a 150 mm bore, 225 mm outer diameter and 56 mm width (5.906 × 8.858 × 2.205 in), a 37.5 mm radial section and roughly 6312 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23030 bore code work?", "a": "The leading 2 in 23030 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 30: 30 × 5 = 150 mm. The 225 mm OD and 56 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23030 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23030 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23030 and 23030K?", "a": "The plain 23030 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23030 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23030K", "23030-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23032", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 160, "D_mm": 240, "B_mm": 60, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 7694, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23032 encode the bore: code 32 = 160 mm (code × 5 from 04 upward). The ISO 15 envelope is 240 mm outside diameter and 60 mm width — 6.299 × 9.449 × 2.362 in, with a 40.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 160 mm-bore 23032 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 60 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (240 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 40.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Grease life on the 23032 is set by the slow, dirty regime it usually works in: relubricate through the W33 groove until old grease flushes clear of the full 60 mm-wide double row, because the 40.0 mm section gives contamination little room to fall away from the 240 mm raceway on its own.", "Check the shoulder geometry for 23032: a generous fillet on the 160 mm shaft looks strong but stops the 60 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 40.0 mm-section outer ring presses flush in the 240 mm housing.", "Large 23032 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 60 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23032, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 160 mm journal must be replaced, or the new bearing frets the same seat.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 160 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 60 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23032 spherical roller bearing?", "a": "A 23032 double-row spherical roller bearing per ISO 15 has a 160 mm bore, 240 mm outer diameter and 60 mm width (6.299 × 9.449 × 2.362 in), a 40.0 mm radial section and roughly 7694 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23032 bore code work?", "a": "The leading 2 in 23032 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 32: 32 × 5 = 160 mm. The 240 mm OD and 60 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23032 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23032 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23032 and 23032K?", "a": "The plain 23032 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23032 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23032K", "23032-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23034", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 170, "D_mm": 260, "B_mm": 67, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 10391, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23034 encode the bore: code 34 = 170 mm (code × 5 from 04 upward). The ISO 15 envelope is 260 mm outside diameter and 67 mm width — 6.693 × 10.236 × 2.638 in, with a 45.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing" ], "pitfalls": [ "The large 170 mm-bore 23034 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 67 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 170 mm bore the 23034 gives a 260×67 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Thermal soak matters on this 170 mm-bore row: a 260 mm housing heating faster than the shaft closes the 45.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 67 mm assembly.", "Before fitting 23034, machine the 170 mm shaft seat and 260 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 67 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 45.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23034 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 170 mm seat cannot creep.", "Read the damage pattern on a removed 23034: spalling concentrated on one side of the 260 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Press 23034 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 260 mm assembly.", "Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 23034 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating." ], "faq": [ { "q": "What are the dimensions of a 23034 spherical roller bearing?", "a": "A 23034 double-row spherical roller bearing per ISO 15 has a 170 mm bore, 260 mm outer diameter and 67 mm width (6.693 × 10.236 × 2.638 in), a 45.0 mm radial section and roughly 10391 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23034 bore code work?", "a": "The leading 2 in 23034 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 34: 34 × 5 = 170 mm. The 260 mm OD and 67 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23034 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23034 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23034 and 23034K?", "a": "The plain 23034 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23034 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23034K", "23034-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23036", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 180, "D_mm": 280, "B_mm": 74, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 13642, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23036 encode the bore: code 36 = 180 mm (code × 5 from 04 upward). The ISO 15 envelope is 280 mm outside diameter and 74 mm width — 7.087 × 11.024 × 2.913 in, with a 50.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 180 mm-bore 23036 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 74 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series (ISO 15 dimension series 30) pairs a wide 74 mm section with a compact 280 mm OD at 180 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Drive-up a sleeve-mounted 23036 on residual clearance, not feel: the 180 mm K taper pulls the wide 74 mm inner ring up quickly, and every 0.01 mm of radial clearance removed is real preload on a 50.0 mm section — measure with feeler gauges at the unloaded roller row before locking the KM nut.", "The 74 mm-wide 23036 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 180 mm bore and 280 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 50.0 mm section.", "For a cylindrical-bore 23036, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 180 mm shaft; cooling creates the interference, while hammering cold through the 280 mm assembly dents the sphered raceways.", "Relubricate 23036 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 74 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 180 mm bore starved.", "In a classic two-bearing arrangement the 23036 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 23036 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 23036 spherical roller bearing?", "a": "A 23036 double-row spherical roller bearing per ISO 15 has a 180 mm bore, 280 mm outer diameter and 74 mm width (7.087 × 11.024 × 2.913 in), a 50.0 mm radial section and roughly 13642 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23036 bore code work?", "a": "The leading 2 in 23036 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 36: 36 × 5 = 180 mm. The 280 mm OD and 74 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23036 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23036 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23036 and 23036K?", "a": "The plain 23036 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23036 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23036K", "23036-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23038", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 190, "D_mm": 290, "B_mm": 75, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 14427, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23038 encode the bore: code 38 = 190 mm (code × 5 from 04 upward). The ISO 15 envelope is 290 mm outside diameter and 75 mm width — 7.48 × 11.417 × 2.953 in, with a 50.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter" ], "pitfalls": [ "The large 190 mm-bore 23038 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 75 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (290 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 50.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Check shaft deflection across the 23038 span: the wide 75 mm section tolerates some misalignment through the sphered raceway, but a bent shaft between two 230-series rows alternates the load path every revolution and frets both 190 mm seats — align to the catalogue angular limit under load, not at standstill.", "Check the shoulder geometry for 23038: a generous fillet on the 190 mm shaft looks strong but stops the 75 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 50.0 mm-section outer ring presses flush in the 290 mm housing.", "Large 23038 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 75 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23038, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 190 mm journal must be replaced, or the new bearing frets the same seat.", "Spherical rollers need a minimum radial load to keep the rollers driven — as a rule of thumb about 2% of the basic dynamic load rating; an unloaded 23038 on an idler or in a cold-start drive will skid and smear, so add preload, reduce the bearing size or use a sealed grease-filled variant.", "Choose the bore type deliberately: plain 23038 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable." ], "faq": [ { "q": "What are the dimensions of a 23038 spherical roller bearing?", "a": "A 23038 double-row spherical roller bearing per ISO 15 has a 190 mm bore, 290 mm outer diameter and 75 mm width (7.48 × 11.417 × 2.953 in), a 50.0 mm radial section and roughly 14427 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23038 bore code work?", "a": "The leading 2 in 23038 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 38: 38 × 5 = 190 mm. The 290 mm OD and 75 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23038 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23038 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23038 and 23038K?", "a": "The plain 23038 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23038 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23038K", "23038-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23040", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 200, "D_mm": 310, "B_mm": 82, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 18435, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23040 encode the bore: code 40 = 200 mm (code × 5 from 04 upward). The ISO 15 envelope is 310 mm outside diameter and 82 mm width — 7.874 × 12.205 × 3.228 in, with a 55.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 200 mm-bore 23040 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 82 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 200 mm bore the 23040 gives a 310×82 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Housing stiffness governs the 23040: with the load carried on a 310 mm OD but only a 55.0 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 82 mm width.", "Before fitting 23040, machine the 200 mm shaft seat and 310 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 82 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 55.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23040 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 200 mm seat cannot creep.", "Read the damage pattern on a removed 23040: spalling concentrated on one side of the 310 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 200 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 82 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23040 spherical roller bearing?", "a": "A 23040 double-row spherical roller bearing per ISO 15 has a 200 mm bore, 310 mm outer diameter and 82 mm width (7.874 × 12.205 × 3.228 in), a 55.0 mm radial section and roughly 18435 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23040 bore code work?", "a": "The leading 2 in 23040 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 40: 40 × 5 = 200 mm. The 310 mm OD and 82 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23040 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23040 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23040 and 23040K?", "a": "The plain 23040 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23040 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23040K", "23040-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23044", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 220, "D_mm": 340, "B_mm": 90, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 24237, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23044 encode the bore: code 44 = 220 mm (code × 5 from 04 upward). The ISO 15 envelope is 340 mm outside diameter and 90 mm width — 8.661 × 13.386 × 3.543 in, with a 60.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 220 mm-bore 23044 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 90 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (340 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 60.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Thermal soak matters on this 220 mm-bore row: a 340 mm housing heating faster than the shaft closes the 60.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 90 mm assembly.", "Check the shoulder geometry for 23044: a generous fillet on the 220 mm shaft looks strong but stops the 90 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 60.0 mm-section outer ring presses flush in the 340 mm housing.", "Large 23044 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 90 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23044, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 220 mm journal must be replaced, or the new bearing frets the same seat.", "In a classic two-bearing arrangement the 23044 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 23044 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 23044 spherical roller bearing?", "a": "A 23044 double-row spherical roller bearing per ISO 15 has a 220 mm bore, 340 mm outer diameter and 90 mm width (8.661 × 13.386 × 3.543 in), a 60.0 mm radial section and roughly 24237 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23044 bore code work?", "a": "The leading 2 in 23044 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 44: 44 × 5 = 220 mm. The 340 mm OD and 90 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23044 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23044 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23044 and 23044K?", "a": "The plain 23044 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23044 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23044K", "23044-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23048", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 240, "D_mm": 360, "B_mm": 92, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 26546, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23048 encode the bore: code 48 = 240 mm (code × 5 from 04 upward). The ISO 15 envelope is 360 mm outside diameter and 92 mm width — 9.449 × 14.173 × 3.622 in, with a 60.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 240 mm-bore 23048 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 92 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series (ISO 15 dimension series 30) pairs a wide 92 mm section with a compact 360 mm OD at 240 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Check shaft deflection across the 23048 span: the wide 92 mm section tolerates some misalignment through the sphered raceway, but a bent shaft between two 230-series rows alternates the load path every revolution and frets both 240 mm seats — align to the catalogue angular limit under load, not at standstill.", "The 92 mm-wide 23048 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 240 mm bore and 360 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 60.0 mm section.", "For a cylindrical-bore 23048, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 240 mm shaft; cooling creates the interference, while hammering cold through the 360 mm assembly dents the sphered raceways.", "Relubricate 23048 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 92 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 240 mm bore starved.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 240 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 92 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23048 spherical roller bearing?", "a": "A 23048 double-row spherical roller bearing per ISO 15 has a 240 mm bore, 360 mm outer diameter and 92 mm width (9.449 × 14.173 × 3.622 in), a 60.0 mm radial section and roughly 26546 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23048 bore code work?", "a": "The leading 2 in 23048 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 48: 48 × 5 = 240 mm. The 360 mm OD and 92 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23048 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23048 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23048 and 23048K?", "a": "The plain 23048 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23048 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23048K", "23048-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23052", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 260, "D_mm": 400, "B_mm": 104, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 38510, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23052 encode the bore: code 52 = 260 mm (code × 5 from 04 upward). The ISO 15 envelope is 400 mm outside diameter and 104 mm width — 10.236 × 15.748 × 4.094 in, with a 70.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 260 mm-bore 23052 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 104 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 260 mm bore the 23052 gives a 400×104 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Grease life on the 23052 is set by the slow, dirty regime it usually works in: relubricate through the W33 groove until old grease flushes clear of the full 104 mm-wide double row, because the 70.0 mm section gives contamination little room to fall away from the 400 mm raceway on its own.", "Before fitting 23052, machine the 260 mm shaft seat and 400 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 104 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 70.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23052 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 260 mm seat cannot creep.", "Read the damage pattern on a removed 23052: spalling concentrated on one side of the 400 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "In a classic two-bearing arrangement the 23052 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 23052 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 23052 spherical roller bearing?", "a": "A 23052 double-row spherical roller bearing per ISO 15 has a 260 mm bore, 400 mm outer diameter and 104 mm width (10.236 × 15.748 × 4.094 in), a 70.0 mm radial section and roughly 38510 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23052 bore code work?", "a": "The leading 2 in 23052 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 52: 52 × 5 = 260 mm. The 400 mm OD and 104 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23052 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23052 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23052 and 23052K?", "a": "The plain 23052 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23052 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23052K", "23052-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23056", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 280, "D_mm": 420, "B_mm": 106, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 41630, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23056 encode the bore: code 56 = 280 mm (code × 5 from 04 upward). The ISO 15 envelope is 420 mm outside diameter and 106 mm width — 11.024 × 16.535 × 4.173 in, with a 70.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 280 mm-bore 23056 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 106 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series keeps the outside diameter one step below the 222 medium row at the same bore (420 mm against roughly a size larger), which raises shaft support without growing the housing — the flip side is that its 70.0 mm section concentrates load, so seat finish, shoulder squareness and housing stiffness matter more than on a wider 223 row.", "Drive-up a sleeve-mounted 23056 on residual clearance, not feel: the 280 mm K taper pulls the wide 106 mm inner ring up quickly, and every 0.01 mm of radial clearance removed is real preload on a 70.0 mm section — measure with feeler gauges at the unloaded roller row before locking the KM nut.", "Check the shoulder geometry for 23056: a generous fillet on the 280 mm shaft looks strong but stops the 106 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 70.0 mm-section outer ring presses flush in the 420 mm housing.", "Large 23056 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 106 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).", "When reusing a sleeve-mounted 23056, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 280 mm journal must be replaced, or the new bearing frets the same seat.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 280 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 106 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23056 spherical roller bearing?", "a": "A 23056 double-row spherical roller bearing per ISO 15 has a 280 mm bore, 420 mm outer diameter and 106 mm width (11.024 × 16.535 × 4.173 in), a 70.0 mm radial section and roughly 41630 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23056 bore code work?", "a": "The leading 2 in 23056 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 56: 56 × 5 = 280 mm. The 420 mm OD and 106 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23056 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23056 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23056 and 23056K?", "a": "The plain 23056 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23056 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23056K", "23056-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23060", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 300, "D_mm": 460, "B_mm": 118, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 57503, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23060 encode the bore: code 60 = 300 mm (code × 5 from 04 upward). The ISO 15 envelope is 460 mm outside diameter and 118 mm width — 11.811 × 18.11 × 4.646 in, with a 80.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders", "large gear drives and mill pinions", "heavy conveyor drum pulleys" ], "failure_modes": [ "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade", "unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely", "thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing", "raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty", "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set" ], "pitfalls": [ "The large 300 mm-bore 23060 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 118 mm double-row assembly cannot be drifted into position without brinelling.", "The 230 series (ISO 15 dimension series 30) pairs a wide 118 mm section with a compact 460 mm OD at 300 mm bore — the radial envelope is one step smaller than the 222 medium series, so it carries heavy radial load in restricted housing space; it is not dimensionally interchangeable with a 222 or 223 row on the same bore, so verify OD and width before substitution.", "Housing stiffness governs the 23060: with the load carried on a 460 mm OD but only a 80.0 mm radial section feeding it, a soft or ribbed thin housing lets the outer ring flex and the sphered raceway misreads it as misalignment — support the housing boss fully around the 118 mm width.", "The 118 mm-wide 23060 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 300 mm bore and 460 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 80.0 mm section.", "For a cylindrical-bore 23060, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 300 mm shaft; cooling creates the interference, while hammering cold through the 460 mm assembly dents the sphered raceways.", "Relubricate 23060 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 118 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 300 mm bore starved.", "In a classic two-bearing arrangement the 23060 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.", "Self-aligning is not a licence to ignore alignment: 23060 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum." ], "faq": [ { "q": "What are the dimensions of a 23060 spherical roller bearing?", "a": "A 23060 double-row spherical roller bearing per ISO 15 has a 300 mm bore, 460 mm outer diameter and 118 mm width (11.811 × 18.11 × 4.646 in), a 80.0 mm radial section and roughly 57503 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23060 bore code work?", "a": "The leading 2 in 23060 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 60: 60 × 5 = 300 mm. The 460 mm OD and 118 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23060 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23060 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23060 and 23060K?", "a": "The plain 23060 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23060 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23060K", "23060-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 }, { "sku": "23064", "brand": "GENERIC-ISO", "series": "23000-series", "type": "spherical_roller", "d_mm": 320, "D_mm": 480, "B_mm": 121, "seal_type": "open", "clearance": "CN", "clearance_options": [ "CN", "C3", "C4" ], "tolerance_class": "P0", "cage_type": "steel", "weight_g": 62068, "weight_estimated": true, "standard": "ISO 15", "naming_rule_text": "In the 23000-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 23064 encode the bore: code 64 = 320 mm (code × 5 from 04 upward). The ISO 15 envelope is 480 mm outside diameter and 121 mm width — 12.598 × 18.898 × 4.764 in, with a 80.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.", "applications": [ "heavy conveyor drum pulleys", "cement and aggregate processing machinery", "mining and aggregate vibrating screens", "jaw and cone crusher eccentric shafts", "paper machine drying cylinders" ], "failure_modes": [ "roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set", "cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit", "fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter", "lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime", "water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade" ], "pitfalls": [ "The large 320 mm-bore 23064 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 121 mm double-row assembly cannot be drifted into position without brinelling.", "In vibrating-screen and feeder duty the 230 row is a common pick: at 320 mm bore the 23064 gives a 480×121 mm envelope with a wide, stiff section, but it must then run C4 clearance with a vibratory-rated cage — a standard CN row with a plain stamped cage will gall and fail early under the same duty.", "Thermal soak matters on this 320 mm-bore row: a 480 mm housing heating faster than the shaft closes the 80.0 mm section's internal clearance, so a mount that ran quiet cold can seize hot — start from C3/C4 and verify the operating-temperature play before signing off the 121 mm assembly.", "Before fitting 23064, machine the 320 mm shaft seat and 480 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 121 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 80.0 mm radial section.", "On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 23064 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 320 mm seat cannot creep.", "Read the damage pattern on a removed 23064: spalling concentrated on one side of the 480 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.", "Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 320 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.", "Specify W33 when the 121 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement." ], "faq": [ { "q": "What are the dimensions of a 23064 spherical roller bearing?", "a": "A 23064 double-row spherical roller bearing per ISO 15 has a 320 mm bore, 480 mm outer diameter and 121 mm width (12.598 × 18.898 × 4.764 in), a 80.0 mm radial section and roughly 62068 g geometry-based estimated mass; catalogue masses vary with cage and design." }, { "q": "How does the 23064 bore code work?", "a": "The leading 2 in 23064 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 64: 64 × 5 = 320 mm. The 480 mm OD and 121 mm width come from the dimension series (23000), not from the bore code alone." }, { "q": "How much misalignment can a 23064 accommodate?", "a": "Thanks to the sphered outer ring raceway, 23064 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty." }, { "q": "What is the difference between 23064 and 23064K?", "a": "The plain 23064 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer." }, { "q": "Should the 23064 be ordered with CN, C3 or C4 clearance?", "a": "Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option." } ], "cross_ref": [], "source_ref": "https://www.iso.org/obp/ui/en/#iso:std:iso:15:ed-4:v1:en", "catalog_ver": "iso15-srb-geometry", "extracted_at": "2026-09-24", "last_verified": "2026-09-24", "confidence_score": 0.7, "status": "published", "aliases": [ "23064K", "23064-K" ], "locale_variants": {}, "temp_min_c": -30, "temp_max_c": 120 } ]