[ { "sku": "1200", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 10, "D_mm": 30, "B_mm": 9, "seal_type": "open", "dynamic_load_kN": 5.55, "static_load_kN": 1.19, "fatigue_load_limit_kN": 0.049, "limiting_speed_rpm": 22000, "speed_oil_rpm": 28000, "weight_g": 34, "manufacturer_designation": "1200S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1200S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1200 carries bore code 00 = 10 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 30 mm and width 9 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small electric motor and fan shafts", "domestic appliance drive shafts", "power tool spindles", "small pump impeller shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1200 fits a 10 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 12xx light section at 10 mm bore uses a smaller 30 mm OD than a 1300; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1200 has no lubricant retention: grease escapes and contaminants migrate straight into the 10×30×9 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1200 units.", "Shaft and housing fillets must clear the bearing chamfer so the 9 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1200 self-aligning ball bearing?", "a": "A 1200 self-aligning ball bearing has a 10 mm bore, 30 mm outer diameter and 9 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1200 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1200 with code 00 has a 10 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1200?", "a": "A bare 1200 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 10 mm bore?", "a": "The 12xx is the light section: 30×9 mm with a 10.0 mm radial section at 10 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2200", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 10, "D_mm": 30, "B_mm": 14, "seal_type": "open", "dynamic_load_kN": 7.45, "static_load_kN": 1.59, "fatigue_load_limit_kN": 0.067, "limiting_speed_rpm": 24000, "speed_oil_rpm": 28000, "weight_g": 46, "manufacturer_designation": "2200S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2200S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2200 carries bore code 00 = 10 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 30 mm and width 14 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "garden equipment and light machinery", "instrument and office machine drives", "small electric motor and fan shafts", "domestic appliance drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2200 fits a 10 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 22xx wide-section at 10 mm bore adds load capacity through increased 14 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1200.", "The open 2200 has no lubricant retention: grease escapes and contaminants migrate straight into the 10×30×14 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2200 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2200." ], "faq": [ { "q": "What are the dimensions of a 2200 self-aligning ball bearing?", "a": "A 2200 self-aligning ball bearing has a 10 mm bore, 30 mm outer diameter and 14 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2200 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2200 with code 00 has a 10 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2200?", "a": "A bare 2200 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 10 mm bore?", "a": "The 22xx is the wide light section: 30×14 mm with a 10.0 mm radial section at 10 mm bore, wider than a 1200 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1300", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 10, "D_mm": 35, "B_mm": 11, "seal_type": "open", "dynamic_load_kN": 7.35, "static_load_kN": 1.62, "fatigue_load_limit_kN": 0.074, "limiting_speed_rpm": 20000, "speed_oil_rpm": 24000, "weight_g": 59, "manufacturer_designation": "1300S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1300S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1300 carries bore code 00 = 10 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 35 mm and width 11 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "power tool spindles", "small pump impeller shafts", "garden equipment and light machinery", "instrument and office machine drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1300 fits a 10 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 13xx medium section at 10 mm bore gains rating through a larger 35 mm OD and 11 mm width; verify the housing accepts the larger envelope before substituting for a 1200.", "The open 1300 has no lubricant retention: grease escapes and contaminants migrate straight into the 10×35×11 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1300 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1300." ], "faq": [ { "q": "What are the dimensions of a 1300 self-aligning ball bearing?", "a": "A 1300 self-aligning ball bearing has a 10 mm bore, 35 mm outer diameter and 11 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1300 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1300 with code 00 has a 10 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1300?", "a": "A bare 1300 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 10 mm bore?", "a": "The 13xx is the medium section: 35×11 mm, 12.5 mm radial section at 10 mm bore, carrying more load than a 1200 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2300", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 10, "D_mm": 35, "B_mm": 17, "seal_type": "open", "dynamic_load_kN": 9.2, "static_load_kN": 2.01, "fatigue_load_limit_kN": 0.096, "limiting_speed_rpm": 18000, "speed_oil_rpm": 22000, "weight_g": 78, "manufacturer_designation": "2300S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2300S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2300 carries bore code 00 = 10 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 35 mm and width 17 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small electric motor and fan shafts", "domestic appliance drive shafts", "power tool spindles", "small pump impeller shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2300 fits a 10 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 23xx heavy wide-section at 10 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2300 has no lubricant retention: grease escapes and contaminants migrate straight into the 10×35×17 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2300 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2300 self-aligning ball bearing?", "a": "A 2300 self-aligning ball bearing has a 10 mm bore, 35 mm outer diameter and 17 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2300 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2300 with code 00 has a 10 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2300?", "a": "A bare 2300 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 10 mm bore?", "a": "The 23xx is the wide heavy section: 35×17 mm, 12.5 mm radial section at 10 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1201", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 12, "D_mm": 32, "B_mm": 10, "seal_type": "open", "dynamic_load_kN": 5.7, "static_load_kN": 1.27, "fatigue_load_limit_kN": 0.053, "limiting_speed_rpm": 22000, "speed_oil_rpm": 26000, "weight_g": 41, "manufacturer_designation": "1201S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1201S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1201 carries bore code 01 = 12 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 32 mm and width 10 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "domestic appliance drive shafts", "power tool spindles", "small pump impeller shafts", "garden equipment and light machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1201 fits a 12 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 12xx light section at 12 mm bore uses a smaller 32 mm OD than a 1301; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1201 has no lubricant retention: grease escapes and contaminants migrate straight into the 12×32×10 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1201 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1201." ], "faq": [ { "q": "What are the dimensions of a 1201 self-aligning ball bearing?", "a": "A 1201 self-aligning ball bearing has a 12 mm bore, 32 mm outer diameter and 10 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1201 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1201 with code 01 has a 12 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1201?", "a": "A bare 1201 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 12 mm bore?", "a": "The 12xx is the light section: 32×10 mm with a 10.0 mm radial section at 12 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2201", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 12, "D_mm": 32, "B_mm": 14, "seal_type": "open", "dynamic_load_kN": 7.75, "static_load_kN": 1.73, "fatigue_load_limit_kN": 0.089, "limiting_speed_rpm": 22000, "speed_oil_rpm": 26000, "weight_g": 51, "manufacturer_designation": "2201S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2201S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2201 carries bore code 01 = 12 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 32 mm and width 14 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "instrument and office machine drives", "small electric motor and fan shafts", "domestic appliance drive shafts", "power tool spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2201 fits a 12 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 22xx wide-section at 12 mm bore adds load capacity through increased 14 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1201.", "The open 2201 has no lubricant retention: grease escapes and contaminants migrate straight into the 12×32×14 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2201 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2201 self-aligning ball bearing?", "a": "A 2201 self-aligning ball bearing has a 12 mm bore, 32 mm outer diameter and 14 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2201 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2201 with code 01 has a 12 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2201?", "a": "A bare 2201 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 12 mm bore?", "a": "The 22xx is the wide light section: 32×14 mm with a 10.0 mm radial section at 12 mm bore, wider than a 1201 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1301", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 12, "D_mm": 37, "B_mm": 12, "seal_type": "open", "dynamic_load_kN": 9.65, "static_load_kN": 2.16, "fatigue_load_limit_kN": 0.078, "limiting_speed_rpm": 18000, "speed_oil_rpm": 22000, "weight_g": 68, "manufacturer_designation": "1301S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1301S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1301 carries bore code 01 = 12 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 37 mm and width 12 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small pump impeller shafts", "garden equipment and light machinery", "instrument and office machine drives", "small electric motor and fan shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1301 fits a 12 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 13xx medium section at 12 mm bore gains rating through a larger 37 mm OD and 12 mm width; verify the housing accepts the larger envelope before substituting for a 1201.", "The open 1301 has no lubricant retention: grease escapes and contaminants migrate straight into the 12×37×12 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1301 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1301." ], "faq": [ { "q": "What are the dimensions of a 1301 self-aligning ball bearing?", "a": "A 1301 self-aligning ball bearing has a 12 mm bore, 37 mm outer diameter and 12 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1301 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1301 with code 01 has a 12 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1301?", "a": "A bare 1301 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 12 mm bore?", "a": "The 13xx is the medium section: 37×12 mm, 12.5 mm radial section at 12 mm bore, carrying more load than a 1201 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2301", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 12, "D_mm": 37, "B_mm": 17, "seal_type": "open", "dynamic_load_kN": 12.1, "static_load_kN": 2.73, "fatigue_load_limit_kN": 0.12, "limiting_speed_rpm": 17000, "speed_oil_rpm": 22000, "weight_g": 87, "manufacturer_designation": "2301S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2301S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2301 carries bore code 01 = 12 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 37 mm and width 17 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "domestic appliance drive shafts", "power tool spindles", "small pump impeller shafts", "garden equipment and light machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2301 fits a 12 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 23xx heavy wide-section at 12 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2301 has no lubricant retention: grease escapes and contaminants migrate straight into the 12×37×17 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2301 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2301-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2301 self-aligning ball bearing?", "a": "A 2301 self-aligning ball bearing has a 12 mm bore, 37 mm outer diameter and 17 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2301 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2301 with code 01 has a 12 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2301?", "a": "A bare 2301 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 12 mm bore?", "a": "The 23xx is the wide heavy section: 37×17 mm, 12.5 mm radial section at 12 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1202", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 15, "D_mm": 35, "B_mm": 11, "seal_type": "open", "dynamic_load_kN": 7.6, "static_load_kN": 1.75, "fatigue_load_limit_kN": 0.072, "limiting_speed_rpm": 18000, "speed_oil_rpm": 22000, "weight_g": 50, "manufacturer_designation": "1202S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1202S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1202 carries bore code 02 = 15 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 35 mm and width 11 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "power tool spindles", "small pump impeller shafts", "garden equipment and light machinery", "instrument and office machine drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1202 fits a 15 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 12xx light section at 15 mm bore uses a smaller 35 mm OD than a 1302; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1202 has no lubricant retention: grease escapes and contaminants migrate straight into the 15×35×11 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1202 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1202." ], "faq": [ { "q": "What are the dimensions of a 1202 self-aligning ball bearing?", "a": "A 1202 self-aligning ball bearing has a 15 mm bore, 35 mm outer diameter and 11 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1202 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1202 with code 02 has a 15 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1202?", "a": "A bare 1202 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 15 mm bore?", "a": "The 12xx is the light section: 35×11 mm with a 10.0 mm radial section at 15 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2202", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 15, "D_mm": 35, "B_mm": 14, "seal_type": "open", "dynamic_load_kN": 7.8, "static_load_kN": 1.85, "fatigue_load_limit_kN": 0.095, "limiting_speed_rpm": 18000, "speed_oil_rpm": 22000, "weight_g": 58, "manufacturer_designation": "2202S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2202S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2202 carries bore code 02 = 15 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 35 mm and width 14 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small electric motor and fan shafts", "domestic appliance drive shafts", "power tool spindles", "small pump impeller shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2202 fits a 15 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 22xx wide-section at 15 mm bore adds load capacity through increased 14 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1202.", "The open 2202 has no lubricant retention: grease escapes and contaminants migrate straight into the 15×35×14 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2202 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2202-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2202 self-aligning ball bearing?", "a": "A 2202 self-aligning ball bearing has a 15 mm bore, 35 mm outer diameter and 14 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2202 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2202 with code 02 has a 15 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2202?", "a": "A bare 2202 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 15 mm bore?", "a": "The 22xx is the wide light section: 35×14 mm with a 10.0 mm radial section at 15 mm bore, wider than a 1202 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1302", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 15, "D_mm": 42, "B_mm": 13, "seal_type": "open", "dynamic_load_kN": 9.7, "static_load_kN": 2.29, "fatigue_load_limit_kN": 0.081, "limiting_speed_rpm": 16000, "speed_oil_rpm": 20000, "weight_g": 101, "manufacturer_designation": "1302S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1302S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1302 carries bore code 02 = 15 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 42 mm and width 13 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "garden equipment and light machinery", "instrument and office machine drives", "small electric motor and fan shafts", "domestic appliance drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1302 fits a 15 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 13xx medium section at 15 mm bore gains rating through a larger 42 mm OD and 13 mm width; verify the housing accepts the larger envelope before substituting for a 1202.", "The open 1302 has no lubricant retention: grease escapes and contaminants migrate straight into the 15×42×13 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1302 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1302 self-aligning ball bearing?", "a": "A 1302 self-aligning ball bearing has a 15 mm bore, 42 mm outer diameter and 13 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1302 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1302 with code 02 has a 15 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1302?", "a": "A bare 1302 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 15 mm bore?", "a": "The 13xx is the medium section: 42×13 mm, 13.5 mm radial section at 15 mm bore, carrying more load than a 1202 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2302", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 15, "D_mm": 42, "B_mm": 17, "seal_type": "open", "dynamic_load_kN": 12.3, "static_load_kN": 2.91, "fatigue_load_limit_kN": 0.13, "limiting_speed_rpm": 14000, "speed_oil_rpm": 18000, "weight_g": 113, "manufacturer_designation": "2302S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2302S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2302 carries bore code 02 = 15 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 42 mm and width 17 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "power tool spindles", "small pump impeller shafts", "garden equipment and light machinery", "instrument and office machine drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2302 fits a 15 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 23xx heavy wide-section at 15 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2302 has no lubricant retention: grease escapes and contaminants migrate straight into the 15×42×17 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2302 units.", "A 15 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2302 self-aligning ball bearing?", "a": "A 2302 self-aligning ball bearing has a 15 mm bore, 42 mm outer diameter and 17 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2302 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2302 with code 02 has a 15 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2302?", "a": "A bare 2302 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 15 mm bore?", "a": "The 23xx is the wide heavy section: 42×17 mm, 13.5 mm radial section at 15 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1203", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 17, "D_mm": 40, "B_mm": 12, "seal_type": "open", "dynamic_load_kN": 8, "static_load_kN": 2.01, "fatigue_load_limit_kN": 0.083, "limiting_speed_rpm": 16000, "speed_oil_rpm": 20000, "weight_g": 74, "manufacturer_designation": "1203S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1203S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1203 carries bore code 03 = 17 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 40 mm and width 12 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small pump impeller shafts", "garden equipment and light machinery", "instrument and office machine drives", "small electric motor and fan shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1203 fits a 17 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 12xx light section at 17 mm bore uses a smaller 40 mm OD than a 1303; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1203 has no lubricant retention: grease escapes and contaminants migrate straight into the 17×40×12 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1203 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1203 self-aligning ball bearing?", "a": "A 1203 self-aligning ball bearing has a 17 mm bore, 40 mm outer diameter and 12 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1203 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1203 with code 03 has a 17 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1203?", "a": "A bare 1203 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 17 mm bore?", "a": "The 12xx is the light section: 40×12 mm with an 11.5 mm radial section at 17 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2203", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 17, "D_mm": 40, "B_mm": 16, "seal_type": "open", "dynamic_load_kN": 9.95, "static_load_kN": 2.42, "fatigue_load_limit_kN": 0.13, "limiting_speed_rpm": 16000, "speed_oil_rpm": 20000, "weight_g": 89, "manufacturer_designation": "2203S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2203S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2203 carries bore code 03 = 17 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 40 mm and width 16 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "domestic appliance drive shafts", "power tool spindles", "small pump impeller shafts", "garden equipment and light machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2203 fits a 17 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 22xx wide-section at 17 mm bore adds load capacity through increased 16 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1203.", "The open 2203 has no lubricant retention: grease escapes and contaminants migrate straight into the 17×40×16 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2203 units.", "A 17 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2203 self-aligning ball bearing?", "a": "A 2203 self-aligning ball bearing has a 17 mm bore, 40 mm outer diameter and 16 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2203 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2203 with code 03 has a 17 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2203?", "a": "A bare 2203 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 17 mm bore?", "a": "The 22xx is the wide light section: 40×16 mm with an 11.5 mm radial section at 17 mm bore, wider than a 1203 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1303", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 17, "D_mm": 47, "B_mm": 14, "seal_type": "open", "dynamic_load_kN": 12.7, "static_load_kN": 3.2, "fatigue_load_limit_kN": 0.11, "limiting_speed_rpm": 14000, "speed_oil_rpm": 17000, "weight_g": 130, "manufacturer_designation": "1303S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1303S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1303 carries bore code 03 = 17 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 47 mm and width 14 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "instrument and office machine drives", "small electric motor and fan shafts", "domestic appliance drive shafts", "power tool spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 1303 fits a 17 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 13xx medium section at 17 mm bore gains rating through a larger 47 mm OD and 14 mm width; verify the housing accepts the larger envelope before substituting for a 1203.", "The open 1303 has no lubricant retention: grease escapes and contaminants migrate straight into the 17×47×14 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1303 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1303-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1303 self-aligning ball bearing?", "a": "A 1303 self-aligning ball bearing has a 17 mm bore, 47 mm outer diameter and 14 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 1303 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 1303 with code 03 has a 17 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 1303?", "a": "A bare 1303 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 17 mm bore?", "a": "The 13xx is the medium section: 47×14 mm, 15.0 mm radial section at 17 mm bore, carrying more load than a 1203 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2303", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 17, "D_mm": 47, "B_mm": 19, "seal_type": "open", "dynamic_load_kN": 14.7, "static_load_kN": 3.55, "fatigue_load_limit_kN": 0.16, "limiting_speed_rpm": 13000, "speed_oil_rpm": 16000, "weight_g": 160, "manufacturer_designation": "2303S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2303S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2303 carries bore code 03 = 17 mm. Codes 00–03 follow the 10/12/15/17 mm exception table rather than code × 5. Outside diameter 47 mm and width 19 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small pump impeller shafts", "garden equipment and light machinery", "instrument and office machine drives", "small electric motor and fan shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Bore codes 00–03 use the exception table: 2303 fits a 17 mm shaft — the code × 5 mnemonic does not apply below code 04 (it would imply 0 mm for code 00).", "The 23xx heavy wide-section at 17 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2303 has no lubricant retention: grease escapes and contaminants migrate straight into the 17×47×19 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2303 units.", "Shaft and housing fillets must clear the bearing chamfer so the 19 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2303 self-aligning ball bearing?", "a": "A 2303 self-aligning ball bearing has a 17 mm bore, 47 mm outer diameter and 19 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "Why does 2303 not follow the bore-code × 5 rule?", "a": "Codes 00–03 use the exception table (10, 12, 15 and 17 mm): 2303 with code 03 has a 17 mm bore. The code × 5 convention starts at code 04 (20 mm)." }, { "q": "What does the open suffix mean on 2303?", "a": "A bare 2303 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 17 mm bore?", "a": "The 23xx is the wide heavy section: 47×19 mm, 15.0 mm radial section at 17 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1204", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 47, "B_mm": 14, "seal_type": "open", "dynamic_load_kN": 10, "static_load_kN": 2.61, "fatigue_load_limit_kN": 0.11, "limiting_speed_rpm": 14000, "speed_oil_rpm": 17000, "weight_g": 120, "manufacturer_designation": "1204S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1204S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1204 carries bore code 04 = 20 mm. Outside diameter 47 mm and width 14 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1204; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 20 mm bore uses a smaller 47 mm OD than a 1304; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1204 has no lubricant retention: grease escapes and contaminants migrate straight into the 20×47×14 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1204 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1204-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1204 self-aligning ball bearing?", "a": "A 1204 self-aligning ball bearing has a 20 mm bore, 47 mm outer diameter and 14 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1204 bore code work?", "a": "The last two digits of 1204 are bore code 04, giving 04 × 5 = 20 mm bore. The 47 mm outside diameter and 14 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1204?", "a": "A bare 1204 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 20 mm bore?", "a": "The 12xx is the light section: 47×14 mm with a 13.5 mm radial section at 20 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1204K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 47, "B_mm": 14, "seal_type": "open", "dynamic_load_kN": 10, "static_load_kN": 2.61, "fatigue_load_limit_kN": 0.11, "limiting_speed_rpm": 14000, "speed_oil_rpm": 17000, "weight_g": 120, "manufacturer_designation": "1204SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1204SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1204 carries bore code 04 = 20 mm. Outside diameter 47 mm and width 14 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1204. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1204K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 20 mm bore uses a smaller 47 mm OD than a 1304; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1204K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 20 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 14 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1204K self-aligning ball bearing?", "a": "A 1204K self-aligning ball bearing has a 20 mm bore, 47 mm outer diameter and 14 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1204." }, { "q": "How does the 1204 bore code work?", "a": "The last two digits of 1204 are bore code 04, giving 04 × 5 = 20 mm bore. The 47 mm outside diameter and 14 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1204K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1204. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 20 mm bore?", "a": "The 12xx is the light section: 47×14 mm with a 13.5 mm radial section at 20 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2204", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 47, "B_mm": 18, "seal_type": "open", "dynamic_load_kN": 12.8, "static_load_kN": 3.3, "fatigue_load_limit_kN": 0.14, "limiting_speed_rpm": 14000, "speed_oil_rpm": 17000, "weight_g": 142, "manufacturer_designation": "2204S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2204S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2204 carries bore code 04 = 20 mm. Outside diameter 47 mm and width 18 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2204; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 20 mm bore adds load capacity through increased 18 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1204.", "The open 2204 has no lubricant retention: grease escapes and contaminants migrate straight into the 20×47×18 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2204 units.", "Shaft and housing fillets must clear the bearing chamfer so the 18 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2204 self-aligning ball bearing?", "a": "A 2204 self-aligning ball bearing has a 20 mm bore, 47 mm outer diameter and 18 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2204 bore code work?", "a": "The last two digits of 2204 are bore code 04, giving 04 × 5 = 20 mm bore. The 47 mm outside diameter and 18 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2204?", "a": "A bare 2204 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 20 mm bore?", "a": "The 22xx is the wide light section: 47×18 mm with a 13.5 mm radial section at 20 mm bore, wider than a 1204 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2204K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 47, "B_mm": 18, "seal_type": "open", "dynamic_load_kN": 12.8, "static_load_kN": 3.3, "fatigue_load_limit_kN": 0.14, "limiting_speed_rpm": 14000, "speed_oil_rpm": 17000, "weight_g": 142, "manufacturer_designation": "2204SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2204SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2204 carries bore code 04 = 20 mm. Outside diameter 47 mm and width 18 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2204. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2204K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 20 mm bore adds load capacity through increased 18 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1204.", "Tapered-bore 2204K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 20 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2204K." ], "faq": [ { "q": "What are the dimensions of a 2204K self-aligning ball bearing?", "a": "A 2204K self-aligning ball bearing has a 20 mm bore, 47 mm outer diameter and 18 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2204." }, { "q": "How does the 2204 bore code work?", "a": "The last two digits of 2204 are bore code 04, giving 04 × 5 = 20 mm bore. The 47 mm outside diameter and 18 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2204K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2204. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 20 mm bore?", "a": "The 22xx is the wide light section: 47×18 mm with a 13.5 mm radial section at 20 mm bore, wider than a 1204 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1304", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 52, "B_mm": 15, "seal_type": "open", "dynamic_load_kN": 12.6, "static_load_kN": 3.35, "fatigue_load_limit_kN": 0.14, "limiting_speed_rpm": 12000, "speed_oil_rpm": 15000, "weight_g": 164, "manufacturer_designation": "1304S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1304S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1304 carries bore code 04 = 20 mm. Outside diameter 52 mm and width 15 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1304; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 20 mm bore gains rating through a larger 52 mm OD and 15 mm width; verify the housing accepts the larger envelope before substituting for a 1204.", "The open 1304 has no lubricant retention: grease escapes and contaminants migrate straight into the 20×52×15 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1304 units.", "A 20 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1304 self-aligning ball bearing?", "a": "A 1304 self-aligning ball bearing has a 20 mm bore, 52 mm outer diameter and 15 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1304 bore code work?", "a": "The last two digits of 1304 are bore code 04, giving 04 × 5 = 20 mm bore. The 52 mm outside diameter and 15 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1304?", "a": "A bare 1304 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 20 mm bore?", "a": "The 13xx is the medium section: 52×15 mm, 16.0 mm radial section at 20 mm bore, carrying more load than a 1204 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1304K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 52, "B_mm": 15, "seal_type": "open", "dynamic_load_kN": 12.6, "static_load_kN": 3.35, "fatigue_load_limit_kN": 0.14, "limiting_speed_rpm": 12000, "speed_oil_rpm": 15000, "weight_g": 164, "manufacturer_designation": "1304SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1304SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1304 carries bore code 04 = 20 mm. Outside diameter 52 mm and width 15 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1304. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1304K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 20 mm bore gains rating through a larger 52 mm OD and 15 mm width; verify the housing accepts the larger envelope before substituting for a 1204.", "Tapered-bore 1304K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 20 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1304K." ], "faq": [ { "q": "What are the dimensions of a 1304K self-aligning ball bearing?", "a": "A 1304K self-aligning ball bearing has a 20 mm bore, 52 mm outer diameter and 15 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1304." }, { "q": "How does the 1304 bore code work?", "a": "The last two digits of 1304 are bore code 04, giving 04 × 5 = 20 mm bore. The 52 mm outside diameter and 15 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1304K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1304. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 20 mm bore?", "a": "The 13xx is the medium section: 52×15 mm, 16.0 mm radial section at 20 mm bore, carrying more load than a 1204 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2304", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 52, "B_mm": 21, "seal_type": "open", "dynamic_load_kN": 18.5, "static_load_kN": 4.7, "fatigue_load_limit_kN": 0.21, "limiting_speed_rpm": 11000, "speed_oil_rpm": 14000, "weight_g": 207, "manufacturer_designation": "2304S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2304S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2304 carries bore code 04 = 20 mm. Outside diameter 52 mm and width 21 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2304; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 20 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2304 has no lubricant retention: grease escapes and contaminants migrate straight into the 20×52×21 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2304 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2304." ], "faq": [ { "q": "What are the dimensions of a 2304 self-aligning ball bearing?", "a": "A 2304 self-aligning ball bearing has a 20 mm bore, 52 mm outer diameter and 21 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2304 bore code work?", "a": "The last two digits of 2304 are bore code 04, giving 04 × 5 = 20 mm bore. The 52 mm outside diameter and 21 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2304?", "a": "A bare 2304 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 20 mm bore?", "a": "The 23xx is the wide heavy section: 52×21 mm, 16.0 mm radial section at 20 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2304K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 20, "D_mm": 52, "B_mm": 21, "seal_type": "open", "dynamic_load_kN": 18.5, "static_load_kN": 4.7, "fatigue_load_limit_kN": 0.21, "limiting_speed_rpm": 11000, "speed_oil_rpm": 14000, "weight_g": 207, "manufacturer_designation": "2304SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2304SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2304 carries bore code 04 = 20 mm. Outside diameter 52 mm and width 21 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2304. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 20 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2304K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 20 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2304K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 20 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2304K self-aligning ball bearing?", "a": "A 2304K self-aligning ball bearing has a 20 mm bore, 52 mm outer diameter and 21 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2304." }, { "q": "How does the 2304 bore code work?", "a": "The last two digits of 2304 are bore code 04, giving 04 × 5 = 20 mm bore. The 52 mm outside diameter and 21 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2304K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2304. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 20 mm bore?", "a": "The 23xx is the wide heavy section: 52×21 mm, 16.0 mm radial section at 20 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1205", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 52, "B_mm": 15, "seal_type": "open", "dynamic_load_kN": 12.2, "static_load_kN": 3.3, "fatigue_load_limit_kN": 0.13, "limiting_speed_rpm": 12000, "speed_oil_rpm": 14000, "weight_g": 140, "manufacturer_designation": "1205S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1205S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1205 carries bore code 05 = 25 mm. Outside diameter 52 mm and width 15 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1205; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 25 mm bore uses a smaller 52 mm OD than a 1305; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1205 has no lubricant retention: grease escapes and contaminants migrate straight into the 25×52×15 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1205 units.", "A 25 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1205 self-aligning ball bearing?", "a": "A 1205 self-aligning ball bearing has a 25 mm bore, 52 mm outer diameter and 15 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1205 bore code work?", "a": "The last two digits of 1205 are bore code 05, giving 05 × 5 = 25 mm bore. The 52 mm outside diameter and 15 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1205?", "a": "A bare 1205 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 25 mm bore?", "a": "The 12xx is the light section: 52×15 mm with a 13.5 mm radial section at 25 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1205K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 52, "B_mm": 15, "seal_type": "open", "dynamic_load_kN": 12.2, "static_load_kN": 3.3, "fatigue_load_limit_kN": 0.13, "limiting_speed_rpm": 12000, "speed_oil_rpm": 14000, "weight_g": 140, "manufacturer_designation": "1205SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1205SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1205 carries bore code 05 = 25 mm. Outside diameter 52 mm and width 15 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1205. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1205K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 25 mm bore uses a smaller 52 mm OD than a 1305; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1205K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 25 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1205K." ], "faq": [ { "q": "What are the dimensions of a 1205K self-aligning ball bearing?", "a": "A 1205K self-aligning ball bearing has a 25 mm bore, 52 mm outer diameter and 15 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1205." }, { "q": "How does the 1205 bore code work?", "a": "The last two digits of 1205 are bore code 05, giving 05 × 5 = 25 mm bore. The 52 mm outside diameter and 15 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1205K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1205. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 25 mm bore?", "a": "The 12xx is the light section: 52×15 mm with a 13.5 mm radial section at 25 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2205", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 52, "B_mm": 18, "seal_type": "open", "dynamic_load_kN": 12.4, "static_load_kN": 3.45, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 12000, "speed_oil_rpm": 14000, "weight_g": 160, "manufacturer_designation": "2205S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2205S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2205 carries bore code 05 = 25 mm. Outside diameter 52 mm and width 18 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2205; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 25 mm bore adds load capacity through increased 18 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1205.", "The open 2205 has no lubricant retention: grease escapes and contaminants migrate straight into the 25×52×18 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2205 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2205." ], "faq": [ { "q": "What are the dimensions of a 2205 self-aligning ball bearing?", "a": "A 2205 self-aligning ball bearing has a 25 mm bore, 52 mm outer diameter and 18 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2205 bore code work?", "a": "The last two digits of 2205 are bore code 05, giving 05 × 5 = 25 mm bore. The 52 mm outside diameter and 18 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2205?", "a": "A bare 2205 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 25 mm bore?", "a": "The 22xx is the wide light section: 52×18 mm with a 13.5 mm radial section at 25 mm bore, wider than a 1205 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2205K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 52, "B_mm": 18, "seal_type": "open", "dynamic_load_kN": 12.4, "static_load_kN": 3.45, "fatigue_load_limit_kN": 0.2, "limiting_speed_rpm": 12000, "speed_oil_rpm": 14000, "weight_g": 160, "manufacturer_designation": "2205SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2205SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2205 carries bore code 05 = 25 mm. Outside diameter 52 mm and width 18 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2205. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2205K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 25 mm bore adds load capacity through increased 18 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1205.", "Tapered-bore 2205K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 25 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2205K self-aligning ball bearing?", "a": "A 2205K self-aligning ball bearing has a 25 mm bore, 52 mm outer diameter and 18 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2205." }, { "q": "How does the 2205 bore code work?", "a": "The last two digits of 2205 are bore code 05, giving 05 × 5 = 25 mm bore. The 52 mm outside diameter and 18 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2205K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2205. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 25 mm bore?", "a": "The 22xx is the wide light section: 52×18 mm with a 13.5 mm radial section at 25 mm bore, wider than a 1205 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1305", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 62, "B_mm": 17, "seal_type": "open", "dynamic_load_kN": 18.2, "static_load_kN": 5, "fatigue_load_limit_kN": 0.15, "limiting_speed_rpm": 10000, "speed_oil_rpm": 13000, "weight_g": 261, "manufacturer_designation": "1305S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1305S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1305 carries bore code 05 = 25 mm. Outside diameter 62 mm and width 17 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1305; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 25 mm bore gains rating through a larger 62 mm OD and 17 mm width; verify the housing accepts the larger envelope before substituting for a 1205.", "The open 1305 has no lubricant retention: grease escapes and contaminants migrate straight into the 25×62×17 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1305 units.", "Shaft and housing fillets must clear the bearing chamfer so the 17 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1305 self-aligning ball bearing?", "a": "A 1305 self-aligning ball bearing has a 25 mm bore, 62 mm outer diameter and 17 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1305 bore code work?", "a": "The last two digits of 1305 are bore code 05, giving 05 × 5 = 25 mm bore. The 62 mm outside diameter and 17 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1305?", "a": "A bare 1305 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 25 mm bore?", "a": "The 13xx is the medium section: 62×17 mm, 18.5 mm radial section at 25 mm bore, carrying more load than a 1205 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1305K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 62, "B_mm": 17, "seal_type": "open", "dynamic_load_kN": 18.2, "static_load_kN": 5, "fatigue_load_limit_kN": 0.15, "limiting_speed_rpm": 10000, "speed_oil_rpm": 13000, "weight_g": 261, "manufacturer_designation": "1305SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1305SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1305 carries bore code 05 = 25 mm. Outside diameter 62 mm and width 17 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1305. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1305K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 25 mm bore gains rating through a larger 62 mm OD and 17 mm width; verify the housing accepts the larger envelope before substituting for a 1205.", "Tapered-bore 1305K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 25 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1305K." ], "faq": [ { "q": "What are the dimensions of a 1305K self-aligning ball bearing?", "a": "A 1305K self-aligning ball bearing has a 25 mm bore, 62 mm outer diameter and 17 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1305." }, { "q": "How does the 1305 bore code work?", "a": "The last two digits of 1305 are bore code 05, giving 05 × 5 = 25 mm bore. The 62 mm outside diameter and 17 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1305K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1305. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 25 mm bore?", "a": "The 13xx is the medium section: 62×17 mm, 18.5 mm radial section at 25 mm bore, carrying more load than a 1205 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2305", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 62, "B_mm": 24, "seal_type": "open", "dynamic_load_kN": 24.9, "static_load_kN": 6.6, "fatigue_load_limit_kN": 0.29, "limiting_speed_rpm": 9500, "speed_oil_rpm": 12000, "weight_g": 332, "manufacturer_designation": "2305S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2305S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2305 carries bore code 05 = 25 mm. Outside diameter 62 mm and width 24 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2305; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 25 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2305 has no lubricant retention: grease escapes and contaminants migrate straight into the 25×62×24 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2305 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2305." ], "faq": [ { "q": "What are the dimensions of a 2305 self-aligning ball bearing?", "a": "A 2305 self-aligning ball bearing has a 25 mm bore, 62 mm outer diameter and 24 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2305 bore code work?", "a": "The last two digits of 2305 are bore code 05, giving 05 × 5 = 25 mm bore. The 62 mm outside diameter and 24 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2305?", "a": "A bare 2305 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 25 mm bore?", "a": "The 23xx is the wide heavy section: 62×24 mm, 18.5 mm radial section at 25 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2305K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 25, "D_mm": 62, "B_mm": 24, "seal_type": "open", "dynamic_load_kN": 24.9, "static_load_kN": 6.6, "fatigue_load_limit_kN": 0.29, "limiting_speed_rpm": 9500, "speed_oil_rpm": 12000, "weight_g": 332, "manufacturer_designation": "2305SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2305SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2305 carries bore code 05 = 25 mm. Outside diameter 62 mm and width 24 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2305. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 25 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2305K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 25 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2305K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 25 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2305-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2305K self-aligning ball bearing?", "a": "A 2305K self-aligning ball bearing has a 25 mm bore, 62 mm outer diameter and 24 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2305." }, { "q": "How does the 2305 bore code work?", "a": "The last two digits of 2305 are bore code 05, giving 05 × 5 = 25 mm bore. The 62 mm outside diameter and 24 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2305K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2305. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 25 mm bore?", "a": "The 23xx is the wide heavy section: 62×24 mm, 18.5 mm radial section at 25 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1206", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 62, "B_mm": 16, "seal_type": "open", "dynamic_load_kN": 15.8, "static_load_kN": 4.65, "fatigue_load_limit_kN": 0.19, "limiting_speed_rpm": 10000, "speed_oil_rpm": 12000, "weight_g": 220, "manufacturer_designation": "1206S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1206S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1206 carries bore code 06 = 30 mm. Outside diameter 62 mm and width 16 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1206; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 30 mm bore uses a smaller 62 mm OD than a 1306; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1206 has no lubricant retention: grease escapes and contaminants migrate straight into the 30×62×16 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1206 units.", "Shaft and housing fillets must clear the bearing chamfer so the 16 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1206 self-aligning ball bearing?", "a": "A 1206 self-aligning ball bearing has a 30 mm bore, 62 mm outer diameter and 16 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1206 bore code work?", "a": "The last two digits of 1206 are bore code 06, giving 06 × 5 = 30 mm bore. The 62 mm outside diameter and 16 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1206?", "a": "A bare 1206 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 30 mm bore?", "a": "The 12xx is the light section: 62×16 mm with a 16.0 mm radial section at 30 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1206K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 62, "B_mm": 16, "seal_type": "open", "dynamic_load_kN": 15.8, "static_load_kN": 4.65, "fatigue_load_limit_kN": 0.19, "limiting_speed_rpm": 10000, "speed_oil_rpm": 12000, "weight_g": 220, "manufacturer_designation": "1206SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1206SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1206 carries bore code 06 = 30 mm. Outside diameter 62 mm and width 16 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1206. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1206K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 30 mm bore uses a smaller 62 mm OD than a 1306; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1206K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 30 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1206K." ], "faq": [ { "q": "What are the dimensions of a 1206K self-aligning ball bearing?", "a": "A 1206K self-aligning ball bearing has a 30 mm bore, 62 mm outer diameter and 16 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1206." }, { "q": "How does the 1206 bore code work?", "a": "The last two digits of 1206 are bore code 06, giving 06 × 5 = 30 mm bore. The 62 mm outside diameter and 16 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1206K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1206. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 30 mm bore?", "a": "The 12xx is the light section: 62×16 mm with a 16.0 mm radial section at 30 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2206", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 62, "B_mm": 20, "seal_type": "open", "dynamic_load_kN": 15.3, "static_load_kN": 4.55, "fatigue_load_limit_kN": 0.26, "limiting_speed_rpm": 10000, "speed_oil_rpm": 12000, "weight_g": 262, "manufacturer_designation": "2206S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2206S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2206 carries bore code 06 = 30 mm. Outside diameter 62 mm and width 20 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2206; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 30 mm bore adds load capacity through increased 20 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1206.", "The open 2206 has no lubricant retention: grease escapes and contaminants migrate straight into the 30×62×20 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2206 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2206." ], "faq": [ { "q": "What are the dimensions of a 2206 self-aligning ball bearing?", "a": "A 2206 self-aligning ball bearing has a 30 mm bore, 62 mm outer diameter and 20 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2206 bore code work?", "a": "The last two digits of 2206 are bore code 06, giving 06 × 5 = 30 mm bore. The 62 mm outside diameter and 20 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2206?", "a": "A bare 2206 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 30 mm bore?", "a": "The 22xx is the wide light section: 62×20 mm with a 16.0 mm radial section at 30 mm bore, wider than a 1206 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2206K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 62, "B_mm": 20, "seal_type": "open", "dynamic_load_kN": 15.3, "static_load_kN": 4.55, "fatigue_load_limit_kN": 0.26, "limiting_speed_rpm": 10000, "speed_oil_rpm": 12000, "weight_g": 262, "manufacturer_designation": "2206SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2206SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2206 carries bore code 06 = 30 mm. Outside diameter 62 mm and width 20 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2206. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2206K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 30 mm bore adds load capacity through increased 20 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1206.", "Tapered-bore 2206K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 30 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2206-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2206K self-aligning ball bearing?", "a": "A 2206K self-aligning ball bearing has a 30 mm bore, 62 mm outer diameter and 20 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2206." }, { "q": "How does the 2206 bore code work?", "a": "The last two digits of 2206 are bore code 06, giving 06 × 5 = 30 mm bore. The 62 mm outside diameter and 20 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2206K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2206. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 30 mm bore?", "a": "The 22xx is the wide light section: 62×20 mm with a 16.0 mm radial section at 30 mm bore, wider than a 1206 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1306", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 72, "B_mm": 19, "seal_type": "open", "dynamic_load_kN": 21.4, "static_load_kN": 6.3, "fatigue_load_limit_kN": 0.19, "limiting_speed_rpm": 8500, "speed_oil_rpm": 11000, "weight_g": 391, "manufacturer_designation": "1306S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1306S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1306 carries bore code 06 = 30 mm. Outside diameter 72 mm and width 19 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1306; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 30 mm bore gains rating through a larger 72 mm OD and 19 mm width; verify the housing accepts the larger envelope before substituting for a 1206.", "The open 1306 has no lubricant retention: grease escapes and contaminants migrate straight into the 30×72×19 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1306 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1306." ], "faq": [ { "q": "What are the dimensions of a 1306 self-aligning ball bearing?", "a": "A 1306 self-aligning ball bearing has a 30 mm bore, 72 mm outer diameter and 19 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1306 bore code work?", "a": "The last two digits of 1306 are bore code 06, giving 06 × 5 = 30 mm bore. The 72 mm outside diameter and 19 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1306?", "a": "A bare 1306 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 30 mm bore?", "a": "The 13xx is the medium section: 72×19 mm, 21.0 mm radial section at 30 mm bore, carrying more load than a 1206 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1306K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 72, "B_mm": 19, "seal_type": "open", "dynamic_load_kN": 21.4, "static_load_kN": 6.3, "fatigue_load_limit_kN": 0.19, "limiting_speed_rpm": 8500, "speed_oil_rpm": 11000, "weight_g": 391, "manufacturer_designation": "1306SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1306SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1306 carries bore code 06 = 30 mm. Outside diameter 72 mm and width 19 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1306. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1306K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 30 mm bore gains rating through a larger 72 mm OD and 19 mm width; verify the housing accepts the larger envelope before substituting for a 1206.", "Tapered-bore 1306K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 30 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1306K self-aligning ball bearing?", "a": "A 1306K self-aligning ball bearing has a 30 mm bore, 72 mm outer diameter and 19 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1306." }, { "q": "How does the 1306 bore code work?", "a": "The last two digits of 1306 are bore code 06, giving 06 × 5 = 30 mm bore. The 72 mm outside diameter and 19 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1306K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1306. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 30 mm bore?", "a": "The 13xx is the medium section: 72×19 mm, 21.0 mm radial section at 30 mm bore, carrying more load than a 1206 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2306", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 72, "B_mm": 27, "seal_type": "open", "dynamic_load_kN": 32, "static_load_kN": 8.75, "fatigue_load_limit_kN": 0.38, "limiting_speed_rpm": 8000, "speed_oil_rpm": 10000, "weight_g": 500, "manufacturer_designation": "2306S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2306S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2306 carries bore code 06 = 30 mm. Outside diameter 72 mm and width 27 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2306; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 30 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2306 has no lubricant retention: grease escapes and contaminants migrate straight into the 30×72×27 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2306 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2306 self-aligning ball bearing?", "a": "A 2306 self-aligning ball bearing has a 30 mm bore, 72 mm outer diameter and 27 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2306 bore code work?", "a": "The last two digits of 2306 are bore code 06, giving 06 × 5 = 30 mm bore. The 72 mm outside diameter and 27 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2306?", "a": "A bare 2306 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 30 mm bore?", "a": "The 23xx is the wide heavy section: 72×27 mm, 21.0 mm radial section at 30 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2306K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 30, "D_mm": 72, "B_mm": 27, "seal_type": "open", "dynamic_load_kN": 32, "static_load_kN": 8.75, "fatigue_load_limit_kN": 0.38, "limiting_speed_rpm": 8000, "speed_oil_rpm": 10000, "weight_g": 500, "manufacturer_designation": "2306SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2306SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2306 carries bore code 06 = 30 mm. Outside diameter 72 mm and width 27 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2306. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 30 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2306K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 30 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2306K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 30 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 30 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2306K self-aligning ball bearing?", "a": "A 2306K self-aligning ball bearing has a 30 mm bore, 72 mm outer diameter and 27 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2306." }, { "q": "How does the 2306 bore code work?", "a": "The last two digits of 2306 are bore code 06, giving 06 × 5 = 30 mm bore. The 72 mm outside diameter and 27 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2306K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2306. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 30 mm bore?", "a": "The 23xx is the wide heavy section: 72×27 mm, 21.0 mm radial section at 30 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1207", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 72, "B_mm": 17, "seal_type": "open", "dynamic_load_kN": 15.9, "static_load_kN": 5.1, "fatigue_load_limit_kN": 0.21, "limiting_speed_rpm": 8500, "speed_oil_rpm": 10000, "weight_g": 330, "manufacturer_designation": "1207S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1207S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1207 carries bore code 07 = 35 mm. Outside diameter 72 mm and width 17 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1207; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 35 mm bore uses a smaller 72 mm OD than a 1307; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1207 has no lubricant retention: grease escapes and contaminants migrate straight into the 35×72×17 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1207 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1207." ], "faq": [ { "q": "What are the dimensions of a 1207 self-aligning ball bearing?", "a": "A 1207 self-aligning ball bearing has a 35 mm bore, 72 mm outer diameter and 17 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1207 bore code work?", "a": "The last two digits of 1207 are bore code 07, giving 07 × 5 = 35 mm bore. The 72 mm outside diameter and 17 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1207?", "a": "A bare 1207 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 35 mm bore?", "a": "The 12xx is the light section: 72×17 mm with an 18.5 mm radial section at 35 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1207K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 72, "B_mm": 17, "seal_type": "open", "dynamic_load_kN": 15.9, "static_load_kN": 5.1, "fatigue_load_limit_kN": 0.21, "limiting_speed_rpm": 8500, "speed_oil_rpm": 10000, "weight_g": 330, "manufacturer_designation": "1207SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1207SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1207 carries bore code 07 = 35 mm. Outside diameter 72 mm and width 17 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1207. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1207K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 35 mm bore uses a smaller 72 mm OD than a 1307; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1207K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 35 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1207K self-aligning ball bearing?", "a": "A 1207K self-aligning ball bearing has a 35 mm bore, 72 mm outer diameter and 17 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1207." }, { "q": "How does the 1207 bore code work?", "a": "The last two digits of 1207 are bore code 07, giving 07 × 5 = 35 mm bore. The 72 mm outside diameter and 17 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1207K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1207. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 35 mm bore?", "a": "The 12xx is the light section: 72×17 mm with an 18.5 mm radial section at 35 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2207", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 72, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 21.7, "static_load_kN": 6.6, "fatigue_load_limit_kN": 0.32, "limiting_speed_rpm": 8500, "speed_oil_rpm": 10000, "weight_g": 403, "manufacturer_designation": "2207S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2207S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2207 carries bore code 07 = 35 mm. Outside diameter 72 mm and width 23 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2207; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 35 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1207.", "The open 2207 has no lubricant retention: grease escapes and contaminants migrate straight into the 35×72×23 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2207 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2207 self-aligning ball bearing?", "a": "A 2207 self-aligning ball bearing has a 35 mm bore, 72 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2207 bore code work?", "a": "The last two digits of 2207 are bore code 07, giving 07 × 5 = 35 mm bore. The 72 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2207?", "a": "A bare 2207 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 35 mm bore?", "a": "The 22xx is the wide light section: 72×23 mm with an 18.5 mm radial section at 35 mm bore, wider than a 1207 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2207K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 72, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 21.7, "static_load_kN": 6.6, "fatigue_load_limit_kN": 0.32, "limiting_speed_rpm": 8500, "speed_oil_rpm": 10000, "weight_g": 403, "manufacturer_designation": "2207SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2207SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2207 carries bore code 07 = 35 mm. Outside diameter 72 mm and width 23 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2207. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2207K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 35 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1207.", "Tapered-bore 2207K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 35 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 35 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2207K self-aligning ball bearing?", "a": "A 2207K self-aligning ball bearing has a 35 mm bore, 72 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2207." }, { "q": "How does the 2207 bore code work?", "a": "The last two digits of 2207 are bore code 07, giving 07 × 5 = 35 mm bore. The 72 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2207K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2207. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 35 mm bore?", "a": "The 22xx is the wide light section: 72×23 mm with an 18.5 mm radial section at 35 mm bore, wider than a 1207 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1307", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 80, "B_mm": 21, "seal_type": "open", "dynamic_load_kN": 25.3, "static_load_kN": 7.85, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 7500, "speed_oil_rpm": 9500, "weight_g": 520, "manufacturer_designation": "1307S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1307S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1307 carries bore code 07 = 35 mm. Outside diameter 80 mm and width 21 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1307; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 35 mm bore gains rating through a larger 80 mm OD and 21 mm width; verify the housing accepts the larger envelope before substituting for a 1207.", "The open 1307 has no lubricant retention: grease escapes and contaminants migrate straight into the 35×80×21 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1307 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1307." ], "faq": [ { "q": "What are the dimensions of a 1307 self-aligning ball bearing?", "a": "A 1307 self-aligning ball bearing has a 35 mm bore, 80 mm outer diameter and 21 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1307 bore code work?", "a": "The last two digits of 1307 are bore code 07, giving 07 × 5 = 35 mm bore. The 80 mm outside diameter and 21 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1307?", "a": "A bare 1307 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 35 mm bore?", "a": "The 13xx is the medium section: 80×21 mm, 22.5 mm radial section at 35 mm bore, carrying more load than a 1207 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1307K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 80, "B_mm": 21, "seal_type": "open", "dynamic_load_kN": 25.3, "static_load_kN": 7.85, "fatigue_load_limit_kN": 0.28, "limiting_speed_rpm": 7500, "speed_oil_rpm": 9500, "weight_g": 520, "manufacturer_designation": "1307SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1307SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1307 carries bore code 07 = 35 mm. Outside diameter 80 mm and width 21 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1307. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1307K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 35 mm bore gains rating through a larger 80 mm OD and 21 mm width; verify the housing accepts the larger envelope before substituting for a 1207.", "Tapered-bore 1307K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 35 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1307-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1307K self-aligning ball bearing?", "a": "A 1307K self-aligning ball bearing has a 35 mm bore, 80 mm outer diameter and 21 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1307." }, { "q": "How does the 1307 bore code work?", "a": "The last two digits of 1307 are bore code 07, giving 07 × 5 = 35 mm bore. The 80 mm outside diameter and 21 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1307K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1307. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 35 mm bore?", "a": "The 13xx is the medium section: 80×21 mm, 22.5 mm radial section at 35 mm bore, carrying more load than a 1207 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2307", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 80, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 40, "static_load_kN": 11.3, "fatigue_load_limit_kN": 0.48, "limiting_speed_rpm": 7100, "speed_oil_rpm": 9000, "weight_g": 671, "manufacturer_designation": "2307S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2307S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2307 carries bore code 07 = 35 mm. Outside diameter 80 mm and width 31 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2307; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 35 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2307 has no lubricant retention: grease escapes and contaminants migrate straight into the 35×80×31 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2307 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2307-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2307 self-aligning ball bearing?", "a": "A 2307 self-aligning ball bearing has a 35 mm bore, 80 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2307 bore code work?", "a": "The last two digits of 2307 are bore code 07, giving 07 × 5 = 35 mm bore. The 80 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2307?", "a": "A bare 2307 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 35 mm bore?", "a": "The 23xx is the wide heavy section: 80×31 mm, 22.5 mm radial section at 35 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2307K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 35, "D_mm": 80, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 40, "static_load_kN": 11.3, "fatigue_load_limit_kN": 0.48, "limiting_speed_rpm": 7100, "speed_oil_rpm": 9000, "weight_g": 671, "manufacturer_designation": "2307SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2307SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2307 carries bore code 07 = 35 mm. Outside diameter 80 mm and width 31 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2307. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 35 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2307K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 35 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2307K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 35 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 31 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2307K self-aligning ball bearing?", "a": "A 2307K self-aligning ball bearing has a 35 mm bore, 80 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2307." }, { "q": "How does the 2307 bore code work?", "a": "The last two digits of 2307 are bore code 07, giving 07 × 5 = 35 mm bore. The 80 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2307K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2307. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 35 mm bore?", "a": "The 23xx is the wide heavy section: 80×31 mm, 22.5 mm radial section at 35 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1208", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 80, "B_mm": 18, "seal_type": "open", "dynamic_load_kN": 19.3, "static_load_kN": 6.5, "fatigue_load_limit_kN": 0.26, "limiting_speed_rpm": 7500, "speed_oil_rpm": 9000, "weight_g": 420, "manufacturer_designation": "1208S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1208S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1208 carries bore code 08 = 40 mm. Outside diameter 80 mm and width 18 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1208; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 40 mm bore uses a smaller 80 mm OD than a 1308; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1208 has no lubricant retention: grease escapes and contaminants migrate straight into the 40×80×18 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1208 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1208." ], "faq": [ { "q": "What are the dimensions of a 1208 self-aligning ball bearing?", "a": "A 1208 self-aligning ball bearing has a 40 mm bore, 80 mm outer diameter and 18 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1208 bore code work?", "a": "The last two digits of 1208 are bore code 08, giving 08 × 5 = 40 mm bore. The 80 mm outside diameter and 18 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1208?", "a": "A bare 1208 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 40 mm bore?", "a": "The 12xx is the light section: 80×18 mm with a 20.0 mm radial section at 40 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1208K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 80, "B_mm": 18, "seal_type": "open", "dynamic_load_kN": 19.3, "static_load_kN": 6.5, "fatigue_load_limit_kN": 0.26, "limiting_speed_rpm": 7500, "speed_oil_rpm": 9000, "weight_g": 420, "manufacturer_designation": "1208SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1208SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1208 carries bore code 08 = 40 mm. Outside diameter 80 mm and width 18 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1208. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1208K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 40 mm bore uses a smaller 80 mm OD than a 1308; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1208K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 40 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1208-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1208K self-aligning ball bearing?", "a": "A 1208K self-aligning ball bearing has a 40 mm bore, 80 mm outer diameter and 18 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1208." }, { "q": "How does the 1208 bore code work?", "a": "The last two digits of 1208 are bore code 08, giving 08 × 5 = 40 mm bore. The 80 mm outside diameter and 18 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1208K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1208. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 40 mm bore?", "a": "The 12xx is the light section: 80×18 mm with a 20.0 mm radial section at 40 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2208", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 80, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 22.4, "static_load_kN": 7.35, "fatigue_load_limit_kN": 0.39, "limiting_speed_rpm": 7500, "speed_oil_rpm": 9000, "weight_g": 506, "manufacturer_designation": "2208S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2208S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2208 carries bore code 08 = 40 mm. Outside diameter 80 mm and width 23 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2208; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 40 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1208.", "The open 2208 has no lubricant retention: grease escapes and contaminants migrate straight into the 40×80×23 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2208 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2208-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2208 self-aligning ball bearing?", "a": "A 2208 self-aligning ball bearing has a 40 mm bore, 80 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2208 bore code work?", "a": "The last two digits of 2208 are bore code 08, giving 08 × 5 = 40 mm bore. The 80 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2208?", "a": "A bare 2208 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 40 mm bore?", "a": "The 22xx is the wide light section: 80×23 mm with a 20.0 mm radial section at 40 mm bore, wider than a 1208 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2208K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 80, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 22.4, "static_load_kN": 7.35, "fatigue_load_limit_kN": 0.39, "limiting_speed_rpm": 7500, "speed_oil_rpm": 9000, "weight_g": 506, "manufacturer_designation": "2208SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2208SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2208 carries bore code 08 = 40 mm. Outside diameter 80 mm and width 23 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2208. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2208K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 40 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1208.", "Tapered-bore 2208K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 40 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 23 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2208K self-aligning ball bearing?", "a": "A 2208K self-aligning ball bearing has a 40 mm bore, 80 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2208." }, { "q": "How does the 2208 bore code work?", "a": "The last two digits of 2208 are bore code 08, giving 08 × 5 = 40 mm bore. The 80 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2208K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2208. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 40 mm bore?", "a": "The 22xx is the wide light section: 80×23 mm with a 20.0 mm radial section at 40 mm bore, wider than a 1208 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1308", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 90, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 29.8, "static_load_kN": 9.7, "fatigue_load_limit_kN": 0.3, "limiting_speed_rpm": 6700, "speed_oil_rpm": 8500, "weight_g": 727, "manufacturer_designation": "1308S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1308S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1308 carries bore code 08 = 40 mm. Outside diameter 90 mm and width 23 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1308; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 40 mm bore gains rating through a larger 90 mm OD and 23 mm width; verify the housing accepts the larger envelope before substituting for a 1208.", "The open 1308 has no lubricant retention: grease escapes and contaminants migrate straight into the 40×90×23 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1308 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1308 self-aligning ball bearing?", "a": "A 1308 self-aligning ball bearing has a 40 mm bore, 90 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1308 bore code work?", "a": "The last two digits of 1308 are bore code 08, giving 08 × 5 = 40 mm bore. The 90 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1308?", "a": "A bare 1308 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 40 mm bore?", "a": "The 13xx is the medium section: 90×23 mm, 25.0 mm radial section at 40 mm bore, carrying more load than a 1208 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1308K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 90, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 29.8, "static_load_kN": 9.7, "fatigue_load_limit_kN": 0.3, "limiting_speed_rpm": 6700, "speed_oil_rpm": 8500, "weight_g": 727, "manufacturer_designation": "1308SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1308SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1308 carries bore code 08 = 40 mm. Outside diameter 90 mm and width 23 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1308. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1308K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 40 mm bore gains rating through a larger 90 mm OD and 23 mm width; verify the housing accepts the larger envelope before substituting for a 1208.", "Tapered-bore 1308K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 40 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 40 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1308K self-aligning ball bearing?", "a": "A 1308K self-aligning ball bearing has a 40 mm bore, 90 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1308." }, { "q": "How does the 1308 bore code work?", "a": "The last two digits of 1308 are bore code 08, giving 08 × 5 = 40 mm bore. The 90 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1308K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1308. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 40 mm bore?", "a": "The 13xx is the medium section: 90×23 mm, 25.0 mm radial section at 40 mm bore, carrying more load than a 1208 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2308", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 90, "B_mm": 33, "seal_type": "open", "dynamic_load_kN": 45.5, "static_load_kN": 13.5, "fatigue_load_limit_kN": 0.58, "limiting_speed_rpm": 6300, "speed_oil_rpm": 8000, "weight_g": 918, "manufacturer_designation": "2308S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2308S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2308 carries bore code 08 = 40 mm. Outside diameter 90 mm and width 33 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2308; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 40 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2308 has no lubricant retention: grease escapes and contaminants migrate straight into the 40×90×33 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2308 units.", "A 40 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2308 self-aligning ball bearing?", "a": "A 2308 self-aligning ball bearing has a 40 mm bore, 90 mm outer diameter and 33 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2308 bore code work?", "a": "The last two digits of 2308 are bore code 08, giving 08 × 5 = 40 mm bore. The 90 mm outside diameter and 33 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2308?", "a": "A bare 2308 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 40 mm bore?", "a": "The 23xx is the wide heavy section: 90×33 mm, 25.0 mm radial section at 40 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2308K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 40, "D_mm": 90, "B_mm": 33, "seal_type": "open", "dynamic_load_kN": 45.5, "static_load_kN": 13.5, "fatigue_load_limit_kN": 0.58, "limiting_speed_rpm": 6300, "speed_oil_rpm": 8000, "weight_g": 918, "manufacturer_designation": "2308SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2308SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2308 carries bore code 08 = 40 mm. Outside diameter 90 mm and width 33 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2308. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2308K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 40 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2308K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 40 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2308K." ], "faq": [ { "q": "What are the dimensions of a 2308K self-aligning ball bearing?", "a": "A 2308K self-aligning ball bearing has a 40 mm bore, 90 mm outer diameter and 33 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2308." }, { "q": "How does the 2308 bore code work?", "a": "The last two digits of 2308 are bore code 08, giving 08 × 5 = 40 mm bore. The 90 mm outside diameter and 33 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2308K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2308. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 40 mm bore?", "a": "The 23xx is the wide heavy section: 90×33 mm, 25.0 mm radial section at 40 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1209", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 85, "B_mm": 19, "seal_type": "open", "dynamic_load_kN": 22, "static_load_kN": 7.35, "fatigue_load_limit_kN": 0.29, "limiting_speed_rpm": 7100, "speed_oil_rpm": 8500, "weight_g": 470, "manufacturer_designation": "1209S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1209S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1209 carries bore code 09 = 45 mm. Outside diameter 85 mm and width 19 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1209; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 45 mm bore uses a smaller 85 mm OD than a 1309; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1209 has no lubricant retention: grease escapes and contaminants migrate straight into the 45×85×19 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1209 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1209 self-aligning ball bearing?", "a": "A 1209 self-aligning ball bearing has a 45 mm bore, 85 mm outer diameter and 19 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1209 bore code work?", "a": "The last two digits of 1209 are bore code 09, giving 09 × 5 = 45 mm bore. The 85 mm outside diameter and 19 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1209?", "a": "A bare 1209 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 45 mm bore?", "a": "The 12xx is the light section: 85×19 mm with a 20.0 mm radial section at 45 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1209K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 85, "B_mm": 19, "seal_type": "open", "dynamic_load_kN": 22, "static_load_kN": 7.35, "fatigue_load_limit_kN": 0.29, "limiting_speed_rpm": 7100, "speed_oil_rpm": 8500, "weight_g": 470, "manufacturer_designation": "1209SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1209SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1209 carries bore code 09 = 45 mm. Outside diameter 85 mm and width 19 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1209. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1209K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 12xx light section at 45 mm bore uses a smaller 85 mm OD than a 1309; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1209K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 45 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 45 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1209K self-aligning ball bearing?", "a": "A 1209K self-aligning ball bearing has a 45 mm bore, 85 mm outer diameter and 19 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1209." }, { "q": "How does the 1209 bore code work?", "a": "The last two digits of 1209 are bore code 09, giving 09 × 5 = 45 mm bore. The 85 mm outside diameter and 19 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1209K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1209. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 45 mm bore?", "a": "The 12xx is the light section: 85×19 mm with a 20.0 mm radial section at 45 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2209", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 85, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 23.3, "static_load_kN": 8.15, "fatigue_load_limit_kN": 0.51, "limiting_speed_rpm": 7100, "speed_oil_rpm": 8500, "weight_g": 556, "manufacturer_designation": "2209S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2209S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2209 carries bore code 09 = 45 mm. Outside diameter 85 mm and width 23 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2209; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 45 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1209.", "The open 2209 has no lubricant retention: grease escapes and contaminants migrate straight into the 45×85×23 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2209 units.", "A 45 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2209 self-aligning ball bearing?", "a": "A 2209 self-aligning ball bearing has a 45 mm bore, 85 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2209 bore code work?", "a": "The last two digits of 2209 are bore code 09, giving 09 × 5 = 45 mm bore. The 85 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2209?", "a": "A bare 2209 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 45 mm bore?", "a": "The 22xx is the wide light section: 85×23 mm with a 20.0 mm radial section at 45 mm bore, wider than a 1209 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2209K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 85, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 23.3, "static_load_kN": 8.15, "fatigue_load_limit_kN": 0.51, "limiting_speed_rpm": 7100, "speed_oil_rpm": 8500, "weight_g": 556, "manufacturer_designation": "2209SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2209SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2209 carries bore code 09 = 45 mm. Outside diameter 85 mm and width 23 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2209. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "small gearbox input/output shafts", "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2209K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 22xx wide-section at 45 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1209.", "Tapered-bore 2209K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 45 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2209K." ], "faq": [ { "q": "What are the dimensions of a 2209K self-aligning ball bearing?", "a": "A 2209K self-aligning ball bearing has a 45 mm bore, 85 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2209." }, { "q": "How does the 2209 bore code work?", "a": "The last two digits of 2209 are bore code 09, giving 09 × 5 = 45 mm bore. The 85 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2209K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2209. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 45 mm bore?", "a": "The 22xx is the wide light section: 85×23 mm with a 20.0 mm radial section at 45 mm bore, wider than a 1209 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1309", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 100, "B_mm": 25, "seal_type": "open", "dynamic_load_kN": 38.5, "static_load_kN": 12.7, "fatigue_load_limit_kN": 0.33, "limiting_speed_rpm": 6000, "speed_oil_rpm": 7500, "weight_g": 971, "manufacturer_designation": "1309S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1309S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1309 carries bore code 09 = 45 mm. Outside diameter 100 mm and width 25 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1309; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 45 mm bore gains rating through a larger 100 mm OD and 25 mm width; verify the housing accepts the larger envelope before substituting for a 1209.", "The open 1309 has no lubricant retention: grease escapes and contaminants migrate straight into the 45×100×25 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1309 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1309-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1309 self-aligning ball bearing?", "a": "A 1309 self-aligning ball bearing has a 45 mm bore, 100 mm outer diameter and 25 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1309 bore code work?", "a": "The last two digits of 1309 are bore code 09, giving 09 × 5 = 45 mm bore. The 100 mm outside diameter and 25 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1309?", "a": "A bare 1309 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 45 mm bore?", "a": "The 13xx is the medium section: 100×25 mm, 27.5 mm radial section at 45 mm bore, carrying more load than a 1209 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1309K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 100, "B_mm": 25, "seal_type": "open", "dynamic_load_kN": 38.5, "static_load_kN": 12.7, "fatigue_load_limit_kN": 0.33, "limiting_speed_rpm": 6000, "speed_oil_rpm": 7500, "weight_g": 971, "manufacturer_designation": "1309SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1309SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1309 carries bore code 09 = 45 mm. Outside diameter 100 mm and width 25 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1309. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "electric motors and generators", "centrifugal pump shafts", "small gearbox input/output shafts", "conveyor roller and pulley shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 1309K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 13xx medium section at 45 mm bore gains rating through a larger 100 mm OD and 25 mm width; verify the housing accepts the larger envelope before substituting for a 1209.", "Tapered-bore 1309K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 45 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 25 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1309K self-aligning ball bearing?", "a": "A 1309K self-aligning ball bearing has a 45 mm bore, 100 mm outer diameter and 25 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1309." }, { "q": "How does the 1309 bore code work?", "a": "The last two digits of 1309 are bore code 09, giving 09 × 5 = 45 mm bore. The 100 mm outside diameter and 25 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1309K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1309. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 45 mm bore?", "a": "The 13xx is the medium section: 100×25 mm, 27.5 mm radial section at 45 mm bore, carrying more load than a 1209 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2309", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 100, "B_mm": 36, "seal_type": "open", "dynamic_load_kN": 55, "static_load_kN": 16.7, "fatigue_load_limit_kN": 0.71, "limiting_speed_rpm": 5600, "speed_oil_rpm": 7100, "weight_g": 1200, "manufacturer_designation": "2309S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2309S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2309 carries bore code 09 = 45 mm. Outside diameter 100 mm and width 36 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor roller and pulley shafts", "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2309; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 45 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2309 has no lubricant retention: grease escapes and contaminants migrate straight into the 45×100×36 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2309 units.", "Shaft and housing fillets must clear the bearing chamfer so the 36 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2309 self-aligning ball bearing?", "a": "A 2309 self-aligning ball bearing has a 45 mm bore, 100 mm outer diameter and 36 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2309 bore code work?", "a": "The last two digits of 2309 are bore code 09, giving 09 × 5 = 45 mm bore. The 100 mm outside diameter and 36 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2309?", "a": "A bare 2309 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 45 mm bore?", "a": "The 23xx is the wide heavy section: 100×36 mm, 27.5 mm radial section at 45 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2309K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 45, "D_mm": 100, "B_mm": 36, "seal_type": "open", "dynamic_load_kN": 55, "static_load_kN": 16.7, "fatigue_load_limit_kN": 0.71, "limiting_speed_rpm": 5600, "speed_oil_rpm": 7100, "weight_g": 1200, "manufacturer_designation": "2309SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2309SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2309 carries bore code 09 = 45 mm. Outside diameter 100 mm and width 36 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2309. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "agricultural equipment (harvesters, balers)", "industrial fan and blower shafts", "electric motors and generators", "centrifugal pump shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "At a 45 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 2309K; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.", "The 23xx heavy wide-section at 45 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2309K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 45 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2309K." ], "faq": [ { "q": "What are the dimensions of a 2309K self-aligning ball bearing?", "a": "A 2309K self-aligning ball bearing has a 45 mm bore, 100 mm outer diameter and 36 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2309." }, { "q": "How does the 2309 bore code work?", "a": "The last two digits of 2309 are bore code 09, giving 09 × 5 = 45 mm bore. The 100 mm outside diameter and 36 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2309K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2309. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 45 mm bore?", "a": "The 23xx is the wide heavy section: 100×36 mm, 27.5 mm radial section at 45 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1210", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 90, "B_mm": 20, "seal_type": "open", "dynamic_load_kN": 22.8, "static_load_kN": 8.1, "fatigue_load_limit_kN": 0.33, "limiting_speed_rpm": 6300, "speed_oil_rpm": 8000, "weight_g": 535, "manufacturer_designation": "1210S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1210S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1210 carries bore code 10 = 50 mm. Outside diameter 90 mm and width 20 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1210 with C3 for those conditions.", "The 12xx light section at 50 mm bore uses a smaller 90 mm OD than a 1310; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1210 has no lubricant retention: grease escapes and contaminants migrate straight into the 50×90×20 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1210 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1210-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1210 self-aligning ball bearing?", "a": "A 1210 self-aligning ball bearing has a 50 mm bore, 90 mm outer diameter and 20 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1210 bore code work?", "a": "The last two digits of 1210 are bore code 10, giving 10 × 5 = 50 mm bore. The 90 mm outside diameter and 20 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1210?", "a": "A bare 1210 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 50 mm bore?", "a": "The 12xx is the light section: 90×20 mm with a 20.0 mm radial section at 50 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1210K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 90, "B_mm": 20, "seal_type": "open", "dynamic_load_kN": 22.8, "static_load_kN": 8.1, "fatigue_load_limit_kN": 0.33, "limiting_speed_rpm": 6300, "speed_oil_rpm": 8000, "weight_g": 535, "manufacturer_designation": "1210SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1210SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1210 carries bore code 10 = 50 mm. Outside diameter 90 mm and width 20 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1210. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1210 with C3 for those conditions.", "The 12xx light section at 50 mm bore uses a smaller 90 mm OD than a 1310; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1210K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 50 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 20 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1210K self-aligning ball bearing?", "a": "A 1210K self-aligning ball bearing has a 50 mm bore, 90 mm outer diameter and 20 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1210." }, { "q": "How does the 1210 bore code work?", "a": "The last two digits of 1210 are bore code 10, giving 10 × 5 = 50 mm bore. The 90 mm outside diameter and 20 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1210K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1210. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 50 mm bore?", "a": "The 12xx is the light section: 90×20 mm with a 20.0 mm radial section at 50 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2210", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 90, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 23.3, "static_load_kN": 8.45, "fatigue_load_limit_kN": 0.57, "limiting_speed_rpm": 6300, "speed_oil_rpm": 8000, "weight_g": 598, "manufacturer_designation": "2210S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2210S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2210 carries bore code 10 = 50 mm. Outside diameter 90 mm and width 23 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2210 with C3 for those conditions.", "The 22xx wide-section at 50 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1210.", "The open 2210 has no lubricant retention: grease escapes and contaminants migrate straight into the 50×90×23 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2210 units.", "Shaft and housing fillets must clear the bearing chamfer so the 23 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2210 self-aligning ball bearing?", "a": "A 2210 self-aligning ball bearing has a 50 mm bore, 90 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2210 bore code work?", "a": "The last two digits of 2210 are bore code 10, giving 10 × 5 = 50 mm bore. The 90 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2210?", "a": "A bare 2210 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 50 mm bore?", "a": "The 22xx is the wide light section: 90×23 mm with a 20.0 mm radial section at 50 mm bore, wider than a 1210 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2210K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 90, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 23.3, "static_load_kN": 8.45, "fatigue_load_limit_kN": 0.57, "limiting_speed_rpm": 6300, "speed_oil_rpm": 8000, "weight_g": 598, "manufacturer_designation": "2210SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2210SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2210 carries bore code 10 = 50 mm. Outside diameter 90 mm and width 23 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2210. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2210 with C3 for those conditions.", "The 22xx wide-section at 50 mm bore adds load capacity through increased 23 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1210.", "Tapered-bore 2210K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 50 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2210K." ], "faq": [ { "q": "What are the dimensions of a 2210K self-aligning ball bearing?", "a": "A 2210K self-aligning ball bearing has a 50 mm bore, 90 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2210." }, { "q": "How does the 2210 bore code work?", "a": "The last two digits of 2210 are bore code 10, giving 10 × 5 = 50 mm bore. The 90 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2210K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2210. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 50 mm bore?", "a": "The 22xx is the wide light section: 90×23 mm with a 20.0 mm radial section at 50 mm bore, wider than a 1210 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1310", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 110, "B_mm": 27, "seal_type": "open", "dynamic_load_kN": 43.5, "static_load_kN": 14.1, "fatigue_load_limit_kN": 0.35, "limiting_speed_rpm": 5600, "speed_oil_rpm": 6700, "weight_g": 1230, "manufacturer_designation": "1310S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1310S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1310 carries bore code 10 = 50 mm. Outside diameter 110 mm and width 27 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1310 with C3 for those conditions.", "The 13xx medium section at 50 mm bore gains rating through a larger 110 mm OD and 27 mm width; verify the housing accepts the larger envelope before substituting for a 1210.", "The open 1310 has no lubricant retention: grease escapes and contaminants migrate straight into the 50×110×27 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1310 units.", "A 50 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1310 self-aligning ball bearing?", "a": "A 1310 self-aligning ball bearing has a 50 mm bore, 110 mm outer diameter and 27 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1310 bore code work?", "a": "The last two digits of 1310 are bore code 10, giving 10 × 5 = 50 mm bore. The 110 mm outside diameter and 27 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1310?", "a": "A bare 1310 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 50 mm bore?", "a": "The 13xx is the medium section: 110×27 mm, 30.0 mm radial section at 50 mm bore, carrying more load than a 1210 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1310K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 110, "B_mm": 27, "seal_type": "open", "dynamic_load_kN": 43.5, "static_load_kN": 14.1, "fatigue_load_limit_kN": 0.35, "limiting_speed_rpm": 5600, "speed_oil_rpm": 6700, "weight_g": 1230, "manufacturer_designation": "1310SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1310SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1310 carries bore code 10 = 50 mm. Outside diameter 110 mm and width 27 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1310. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1310 with C3 for those conditions.", "The 13xx medium section at 50 mm bore gains rating through a larger 110 mm OD and 27 mm width; verify the housing accepts the larger envelope before substituting for a 1210.", "Tapered-bore 1310K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 50 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1310K." ], "faq": [ { "q": "What are the dimensions of a 1310K self-aligning ball bearing?", "a": "A 1310K self-aligning ball bearing has a 50 mm bore, 110 mm outer diameter and 27 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1310." }, { "q": "How does the 1310 bore code work?", "a": "The last two digits of 1310 are bore code 10, giving 10 × 5 = 50 mm bore. The 110 mm outside diameter and 27 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1310K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1310. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 50 mm bore?", "a": "The 13xx is the medium section: 110×27 mm, 30.0 mm radial section at 50 mm bore, carrying more load than a 1210 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2310", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 110, "B_mm": 40, "seal_type": "open", "dynamic_load_kN": 65, "static_load_kN": 20.2, "fatigue_load_limit_kN": 0.86, "limiting_speed_rpm": 5000, "speed_oil_rpm": 6300, "weight_g": 1630, "manufacturer_designation": "2310S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2310S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2310 carries bore code 10 = 50 mm. Outside diameter 110 mm and width 40 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2310 with C3 for those conditions.", "The 23xx heavy wide-section at 50 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2310 has no lubricant retention: grease escapes and contaminants migrate straight into the 50×110×40 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2310 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2310." ], "faq": [ { "q": "What are the dimensions of a 2310 self-aligning ball bearing?", "a": "A 2310 self-aligning ball bearing has a 50 mm bore, 110 mm outer diameter and 40 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2310 bore code work?", "a": "The last two digits of 2310 are bore code 10, giving 10 × 5 = 50 mm bore. The 110 mm outside diameter and 40 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2310?", "a": "A bare 2310 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 50 mm bore?", "a": "The 23xx is the wide heavy section: 110×40 mm, 30.0 mm radial section at 50 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2310K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 50, "D_mm": 110, "B_mm": 40, "seal_type": "open", "dynamic_load_kN": 65, "static_load_kN": 20.2, "fatigue_load_limit_kN": 0.86, "limiting_speed_rpm": 5000, "speed_oil_rpm": 6300, "weight_g": 1630, "manufacturer_designation": "2310SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2310SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2310 carries bore code 10 = 50 mm. Outside diameter 110 mm and width 40 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2310. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 50 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2310 with C3 for those conditions.", "The 23xx heavy wide-section at 50 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2310K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 50 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2310K self-aligning ball bearing?", "a": "A 2310K self-aligning ball bearing has a 50 mm bore, 110 mm outer diameter and 40 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2310." }, { "q": "How does the 2310 bore code work?", "a": "The last two digits of 2310 are bore code 10, giving 10 × 5 = 50 mm bore. The 110 mm outside diameter and 40 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2310K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2310. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 50 mm bore?", "a": "The 23xx is the wide heavy section: 110×40 mm, 30.0 mm radial section at 50 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1211", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 100, "B_mm": 21, "seal_type": "open", "dynamic_load_kN": 26.9, "static_load_kN": 10, "fatigue_load_limit_kN": 0.4, "limiting_speed_rpm": 6000, "speed_oil_rpm": 7100, "weight_g": 708, "manufacturer_designation": "1211S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1211S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1211 carries bore code 11 = 55 mm. Outside diameter 100 mm and width 21 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1211 with C3 for those conditions.", "The 12xx light section at 55 mm bore uses a smaller 100 mm OD than a 1311; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1211 has no lubricant retention: grease escapes and contaminants migrate straight into the 55×100×21 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1211 units.", "A 55 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1211 self-aligning ball bearing?", "a": "A 1211 self-aligning ball bearing has a 55 mm bore, 100 mm outer diameter and 21 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1211 bore code work?", "a": "The last two digits of 1211 are bore code 11, giving 11 × 5 = 55 mm bore. The 100 mm outside diameter and 21 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1211?", "a": "A bare 1211 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 55 mm bore?", "a": "The 12xx is the light section: 100×21 mm with a 22.5 mm radial section at 55 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1211K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 100, "B_mm": 21, "seal_type": "open", "dynamic_load_kN": 26.9, "static_load_kN": 10, "fatigue_load_limit_kN": 0.4, "limiting_speed_rpm": 6000, "speed_oil_rpm": 7100, "weight_g": 708, "manufacturer_designation": "1211SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1211SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1211 carries bore code 11 = 55 mm. Outside diameter 100 mm and width 21 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1211. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1211 with C3 for those conditions.", "The 12xx light section at 55 mm bore uses a smaller 100 mm OD than a 1311; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1211K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 55 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1211K." ], "faq": [ { "q": "What are the dimensions of a 1211K self-aligning ball bearing?", "a": "A 1211K self-aligning ball bearing has a 55 mm bore, 100 mm outer diameter and 21 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1211." }, { "q": "How does the 1211 bore code work?", "a": "The last two digits of 1211 are bore code 11, giving 11 × 5 = 55 mm bore. The 100 mm outside diameter and 21 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1211K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1211. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 55 mm bore?", "a": "The 12xx is the light section: 100×21 mm with a 22.5 mm radial section at 55 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2211", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 100, "B_mm": 25, "seal_type": "open", "dynamic_load_kN": 26.7, "static_load_kN": 9.9, "fatigue_load_limit_kN": 0.72, "limiting_speed_rpm": 6000, "speed_oil_rpm": 7100, "weight_g": 807, "manufacturer_designation": "2211S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2211S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2211 carries bore code 11 = 55 mm. Outside diameter 100 mm and width 25 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2211 with C3 for those conditions.", "The 22xx wide-section at 55 mm bore adds load capacity through increased 25 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1211.", "The open 2211 has no lubricant retention: grease escapes and contaminants migrate straight into the 55×100×25 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2211 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2211." ], "faq": [ { "q": "What are the dimensions of a 2211 self-aligning ball bearing?", "a": "A 2211 self-aligning ball bearing has a 55 mm bore, 100 mm outer diameter and 25 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2211 bore code work?", "a": "The last two digits of 2211 are bore code 11, giving 11 × 5 = 55 mm bore. The 100 mm outside diameter and 25 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2211?", "a": "A bare 2211 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 55 mm bore?", "a": "The 22xx is the wide light section: 100×25 mm with a 22.5 mm radial section at 55 mm bore, wider than a 1211 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2211K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 100, "B_mm": 25, "seal_type": "open", "dynamic_load_kN": 26.7, "static_load_kN": 9.9, "fatigue_load_limit_kN": 0.72, "limiting_speed_rpm": 6000, "speed_oil_rpm": 7100, "weight_g": 807, "manufacturer_designation": "2211SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2211SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2211 carries bore code 11 = 55 mm. Outside diameter 100 mm and width 25 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2211. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2211 with C3 for those conditions.", "The 22xx wide-section at 55 mm bore adds load capacity through increased 25 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1211.", "Tapered-bore 2211K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 55 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2211K self-aligning ball bearing?", "a": "A 2211K self-aligning ball bearing has a 55 mm bore, 100 mm outer diameter and 25 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2211." }, { "q": "How does the 2211 bore code work?", "a": "The last two digits of 2211 are bore code 11, giving 11 × 5 = 55 mm bore. The 100 mm outside diameter and 25 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2211K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2211. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 55 mm bore?", "a": "The 22xx is the wide light section: 100×25 mm with a 22.5 mm radial section at 55 mm bore, wider than a 1211 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1311", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 120, "B_mm": 29, "seal_type": "open", "dynamic_load_kN": 51.5, "static_load_kN": 17.9, "fatigue_load_limit_kN": 0.4, "limiting_speed_rpm": 5000, "speed_oil_rpm": 6300, "weight_g": 1600, "manufacturer_designation": "1311S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1311S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1311 carries bore code 11 = 55 mm. Outside diameter 120 mm and width 29 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1311 with C3 for those conditions.", "The 13xx medium section at 55 mm bore gains rating through a larger 120 mm OD and 29 mm width; verify the housing accepts the larger envelope before substituting for a 1211.", "The open 1311 has no lubricant retention: grease escapes and contaminants migrate straight into the 55×120×29 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1311 units.", "Shaft and housing fillets must clear the bearing chamfer so the 29 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1311 self-aligning ball bearing?", "a": "A 1311 self-aligning ball bearing has a 55 mm bore, 120 mm outer diameter and 29 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1311 bore code work?", "a": "The last two digits of 1311 are bore code 11, giving 11 × 5 = 55 mm bore. The 120 mm outside diameter and 29 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1311?", "a": "A bare 1311 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 55 mm bore?", "a": "The 13xx is the medium section: 120×29 mm, 32.5 mm radial section at 55 mm bore, carrying more load than a 1211 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1311K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 120, "B_mm": 29, "seal_type": "open", "dynamic_load_kN": 51.5, "static_load_kN": 17.9, "fatigue_load_limit_kN": 0.4, "limiting_speed_rpm": 5000, "speed_oil_rpm": 6300, "weight_g": 1600, "manufacturer_designation": "1311SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1311SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1311 carries bore code 11 = 55 mm. Outside diameter 120 mm and width 29 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1311. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1311 with C3 for those conditions.", "The 13xx medium section at 55 mm bore gains rating through a larger 120 mm OD and 29 mm width; verify the housing accepts the larger envelope before substituting for a 1211.", "Tapered-bore 1311K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 55 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1311K." ], "faq": [ { "q": "What are the dimensions of a 1311K self-aligning ball bearing?", "a": "A 1311K self-aligning ball bearing has a 55 mm bore, 120 mm outer diameter and 29 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1311." }, { "q": "How does the 1311 bore code work?", "a": "The last two digits of 1311 are bore code 11, giving 11 × 5 = 55 mm bore. The 120 mm outside diameter and 29 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1311K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1311. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 55 mm bore?", "a": "The 13xx is the medium section: 120×29 mm, 32.5 mm radial section at 55 mm bore, carrying more load than a 1211 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2311", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 120, "B_mm": 43, "seal_type": "open", "dynamic_load_kN": 76.5, "static_load_kN": 24, "fatigue_load_limit_kN": 1, "limiting_speed_rpm": 4800, "speed_oil_rpm": 6000, "weight_g": 2080, "manufacturer_designation": "2311S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2311S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2311 carries bore code 11 = 55 mm. Outside diameter 120 mm and width 43 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2311 with C3 for those conditions.", "The 23xx heavy wide-section at 55 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2311 has no lubricant retention: grease escapes and contaminants migrate straight into the 55×120×43 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2311 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2311." ], "faq": [ { "q": "What are the dimensions of a 2311 self-aligning ball bearing?", "a": "A 2311 self-aligning ball bearing has a 55 mm bore, 120 mm outer diameter and 43 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2311 bore code work?", "a": "The last two digits of 2311 are bore code 11, giving 11 × 5 = 55 mm bore. The 120 mm outside diameter and 43 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2311?", "a": "A bare 2311 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 55 mm bore?", "a": "The 23xx is the wide heavy section: 120×43 mm, 32.5 mm radial section at 55 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2311K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 55, "D_mm": 120, "B_mm": 43, "seal_type": "open", "dynamic_load_kN": 76.5, "static_load_kN": 24, "fatigue_load_limit_kN": 1, "limiting_speed_rpm": 4800, "speed_oil_rpm": 6000, "weight_g": 2080, "manufacturer_designation": "2311SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2311SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2311 carries bore code 11 = 55 mm. Outside diameter 120 mm and width 43 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2311. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 55 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2311 with C3 for those conditions.", "The 23xx heavy wide-section at 55 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2311K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 55 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2311-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2311K self-aligning ball bearing?", "a": "A 2311K self-aligning ball bearing has a 55 mm bore, 120 mm outer diameter and 43 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2311." }, { "q": "How does the 2311 bore code work?", "a": "The last two digits of 2311 are bore code 11, giving 11 × 5 = 55 mm bore. The 120 mm outside diameter and 43 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2311K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2311. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 55 mm bore?", "a": "The 23xx is the wide heavy section: 120×43 mm, 32.5 mm radial section at 55 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1212", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 110, "B_mm": 22, "seal_type": "open", "dynamic_load_kN": 30.5, "static_load_kN": 11.5, "fatigue_load_limit_kN": 0.46, "limiting_speed_rpm": 5300, "speed_oil_rpm": 6300, "weight_g": 910, "manufacturer_designation": "1212S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1212S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1212 carries bore code 12 = 60 mm. Outside diameter 110 mm and width 22 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1212 with C3 for those conditions.", "The 12xx light section at 60 mm bore uses a smaller 110 mm OD than a 1312; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1212 has no lubricant retention: grease escapes and contaminants migrate straight into the 60×110×22 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1212 units.", "Shaft and housing fillets must clear the bearing chamfer so the 22 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1212 self-aligning ball bearing?", "a": "A 1212 self-aligning ball bearing has a 60 mm bore, 110 mm outer diameter and 22 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1212 bore code work?", "a": "The last two digits of 1212 are bore code 12, giving 12 × 5 = 60 mm bore. The 110 mm outside diameter and 22 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1212?", "a": "A bare 1212 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 60 mm bore?", "a": "The 12xx is the light section: 110×22 mm with a 25.0 mm radial section at 60 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1212K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 110, "B_mm": 22, "seal_type": "open", "dynamic_load_kN": 30.5, "static_load_kN": 11.5, "fatigue_load_limit_kN": 0.46, "limiting_speed_rpm": 5300, "speed_oil_rpm": 6300, "weight_g": 910, "manufacturer_designation": "1212SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1212SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1212 carries bore code 12 = 60 mm. Outside diameter 110 mm and width 22 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1212. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1212 with C3 for those conditions.", "The 12xx light section at 60 mm bore uses a smaller 110 mm OD than a 1312; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1212K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 60 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1212K." ], "faq": [ { "q": "What are the dimensions of a 1212K self-aligning ball bearing?", "a": "A 1212K self-aligning ball bearing has a 60 mm bore, 110 mm outer diameter and 22 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1212." }, { "q": "How does the 1212 bore code work?", "a": "The last two digits of 1212 are bore code 12, giving 12 × 5 = 60 mm bore. The 110 mm outside diameter and 22 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1212K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1212. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 60 mm bore?", "a": "The 12xx is the light section: 110×22 mm with a 25.0 mm radial section at 60 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2212", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 110, "B_mm": 28, "seal_type": "open", "dynamic_load_kN": 34, "static_load_kN": 12.6, "fatigue_load_limit_kN": 0.84, "limiting_speed_rpm": 5300, "speed_oil_rpm": 6300, "weight_g": 1100, "manufacturer_designation": "2212S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2212S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2212 carries bore code 12 = 60 mm. Outside diameter 110 mm and width 28 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2212 with C3 for those conditions.", "The 22xx wide-section at 60 mm bore adds load capacity through increased 28 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1212.", "The open 2212 has no lubricant retention: grease escapes and contaminants migrate straight into the 60×110×28 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2212 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2212." ], "faq": [ { "q": "What are the dimensions of a 2212 self-aligning ball bearing?", "a": "A 2212 self-aligning ball bearing has a 60 mm bore, 110 mm outer diameter and 28 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2212 bore code work?", "a": "The last two digits of 2212 are bore code 12, giving 12 × 5 = 60 mm bore. The 110 mm outside diameter and 28 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2212?", "a": "A bare 2212 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 60 mm bore?", "a": "The 22xx is the wide light section: 110×28 mm with a 25.0 mm radial section at 60 mm bore, wider than a 1212 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2212K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 110, "B_mm": 28, "seal_type": "open", "dynamic_load_kN": 34, "static_load_kN": 12.6, "fatigue_load_limit_kN": 0.84, "limiting_speed_rpm": 5300, "speed_oil_rpm": 6300, "weight_g": 1100, "manufacturer_designation": "2212SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2212SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2212 carries bore code 12 = 60 mm. Outside diameter 110 mm and width 28 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2212. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2212 with C3 for those conditions.", "The 22xx wide-section at 60 mm bore adds load capacity through increased 28 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1212.", "Tapered-bore 2212K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 60 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2212-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2212K self-aligning ball bearing?", "a": "A 2212K self-aligning ball bearing has a 60 mm bore, 110 mm outer diameter and 28 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2212." }, { "q": "How does the 2212 bore code work?", "a": "The last two digits of 2212 are bore code 12, giving 12 × 5 = 60 mm bore. The 110 mm outside diameter and 28 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2212K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2212. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 60 mm bore?", "a": "The 22xx is the wide light section: 110×28 mm with a 25.0 mm radial section at 60 mm bore, wider than a 1212 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1312", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 130, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 57.5, "static_load_kN": 20.8, "fatigue_load_limit_kN": 0.51, "limiting_speed_rpm": 4500, "speed_oil_rpm": 5600, "weight_g": 2000, "manufacturer_designation": "1312S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1312S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1312 carries bore code 12 = 60 mm. Outside diameter 130 mm and width 31 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1312 with C3 for those conditions.", "The 13xx medium section at 60 mm bore gains rating through a larger 130 mm OD and 31 mm width; verify the housing accepts the larger envelope before substituting for a 1212.", "The open 1312 has no lubricant retention: grease escapes and contaminants migrate straight into the 60×130×31 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1312 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1312." ], "faq": [ { "q": "What are the dimensions of a 1312 self-aligning ball bearing?", "a": "A 1312 self-aligning ball bearing has a 60 mm bore, 130 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1312 bore code work?", "a": "The last two digits of 1312 are bore code 12, giving 12 × 5 = 60 mm bore. The 130 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1312?", "a": "A bare 1312 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 60 mm bore?", "a": "The 13xx is the medium section: 130×31 mm, 35.0 mm radial section at 60 mm bore, carrying more load than a 1212 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1312K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 130, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 57.5, "static_load_kN": 20.8, "fatigue_load_limit_kN": 0.51, "limiting_speed_rpm": 4500, "speed_oil_rpm": 5600, "weight_g": 2000, "manufacturer_designation": "1312SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1312SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1312 carries bore code 12 = 60 mm. Outside diameter 130 mm and width 31 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1312. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1312 with C3 for those conditions.", "The 13xx medium section at 60 mm bore gains rating through a larger 130 mm OD and 31 mm width; verify the housing accepts the larger envelope before substituting for a 1212.", "Tapered-bore 1312K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 60 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1312K self-aligning ball bearing?", "a": "A 1312K self-aligning ball bearing has a 60 mm bore, 130 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1312." }, { "q": "How does the 1312 bore code work?", "a": "The last two digits of 1312 are bore code 12, giving 12 × 5 = 60 mm bore. The 130 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1312K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1312. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 60 mm bore?", "a": "The 13xx is the medium section: 130×31 mm, 35.0 mm radial section at 60 mm bore, carrying more load than a 1212 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2312", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 130, "B_mm": 46, "seal_type": "open", "dynamic_load_kN": 88.5, "static_load_kN": 28.3, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 2580, "manufacturer_designation": "2312S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2312S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2312 carries bore code 12 = 60 mm. Outside diameter 130 mm and width 46 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2312 with C3 for those conditions.", "The 23xx heavy wide-section at 60 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2312 has no lubricant retention: grease escapes and contaminants migrate straight into the 60×130×46 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2312 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2312 self-aligning ball bearing?", "a": "A 2312 self-aligning ball bearing has a 60 mm bore, 130 mm outer diameter and 46 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2312 bore code work?", "a": "The last two digits of 2312 are bore code 12, giving 12 × 5 = 60 mm bore. The 130 mm outside diameter and 46 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2312?", "a": "A bare 2312 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 60 mm bore?", "a": "The 23xx is the wide heavy section: 130×46 mm, 35.0 mm radial section at 60 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2312K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 60, "D_mm": 130, "B_mm": 46, "seal_type": "open", "dynamic_load_kN": 88.5, "static_load_kN": 28.3, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 2580, "manufacturer_designation": "2312SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2312SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2312 carries bore code 12 = 60 mm. Outside diameter 130 mm and width 46 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2312. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 60 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2312 with C3 for those conditions.", "The 23xx heavy wide-section at 60 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2312K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 60 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 60 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2312K self-aligning ball bearing?", "a": "A 2312K self-aligning ball bearing has a 60 mm bore, 130 mm outer diameter and 46 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2312." }, { "q": "How does the 2312 bore code work?", "a": "The last two digits of 2312 are bore code 12, giving 12 × 5 = 60 mm bore. The 130 mm outside diameter and 46 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2312K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2312. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 60 mm bore?", "a": "The 23xx is the wide heavy section: 130×46 mm, 35.0 mm radial section at 60 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1213", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 120, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 31, "static_load_kN": 12.5, "fatigue_load_limit_kN": 0.5, "limiting_speed_rpm": 4800, "speed_oil_rpm": 6000, "weight_g": 1160, "manufacturer_designation": "1213S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1213S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1213 carries bore code 13 = 65 mm. Outside diameter 120 mm and width 23 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1213 with C3 for those conditions.", "The 12xx light section at 65 mm bore uses a smaller 120 mm OD than a 1313; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1213 has no lubricant retention: grease escapes and contaminants migrate straight into the 65×120×23 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1213 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1213." ], "faq": [ { "q": "What are the dimensions of a 1213 self-aligning ball bearing?", "a": "A 1213 self-aligning ball bearing has a 65 mm bore, 120 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1213 bore code work?", "a": "The last two digits of 1213 are bore code 13, giving 13 × 5 = 65 mm bore. The 120 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1213?", "a": "A bare 1213 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 65 mm bore?", "a": "The 12xx is the light section: 120×23 mm with a 27.5 mm radial section at 65 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1213K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 120, "B_mm": 23, "seal_type": "open", "dynamic_load_kN": 31, "static_load_kN": 12.5, "fatigue_load_limit_kN": 0.5, "limiting_speed_rpm": 4800, "speed_oil_rpm": 6000, "weight_g": 1160, "manufacturer_designation": "1213SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1213SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1213 carries bore code 13 = 65 mm. Outside diameter 120 mm and width 23 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1213. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1213 with C3 for those conditions.", "The 12xx light section at 65 mm bore uses a smaller 120 mm OD than a 1313; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1213K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 65 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1213K self-aligning ball bearing?", "a": "A 1213K self-aligning ball bearing has a 65 mm bore, 120 mm outer diameter and 23 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1213." }, { "q": "How does the 1213 bore code work?", "a": "The last two digits of 1213 are bore code 13, giving 13 × 5 = 65 mm bore. The 120 mm outside diameter and 23 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1213K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1213. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 65 mm bore?", "a": "The 12xx is the light section: 120×23 mm with a 27.5 mm radial section at 65 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2213", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 120, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 43.5, "static_load_kN": 16.4, "fatigue_load_limit_kN": 0.92, "limiting_speed_rpm": 4800, "speed_oil_rpm": 6000, "weight_g": 1500, "manufacturer_designation": "2213S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2213S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2213 carries bore code 13 = 65 mm. Outside diameter 120 mm and width 31 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2213 with C3 for those conditions.", "The 22xx wide-section at 65 mm bore adds load capacity through increased 31 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1213.", "The open 2213 has no lubricant retention: grease escapes and contaminants migrate straight into the 65×120×31 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2213 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2213 self-aligning ball bearing?", "a": "A 2213 self-aligning ball bearing has a 65 mm bore, 120 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2213 bore code work?", "a": "The last two digits of 2213 are bore code 13, giving 13 × 5 = 65 mm bore. The 120 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2213?", "a": "A bare 2213 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 65 mm bore?", "a": "The 22xx is the wide light section: 120×31 mm with a 27.5 mm radial section at 65 mm bore, wider than a 1213 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2213K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 120, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 43.5, "static_load_kN": 16.4, "fatigue_load_limit_kN": 0.92, "limiting_speed_rpm": 4800, "speed_oil_rpm": 6000, "weight_g": 1500, "manufacturer_designation": "2213SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2213SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2213 carries bore code 13 = 65 mm. Outside diameter 120 mm and width 31 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2213. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2213 with C3 for those conditions.", "The 22xx wide-section at 65 mm bore adds load capacity through increased 31 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1213.", "Tapered-bore 2213K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 65 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 65 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2213K self-aligning ball bearing?", "a": "A 2213K self-aligning ball bearing has a 65 mm bore, 120 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2213." }, { "q": "How does the 2213 bore code work?", "a": "The last two digits of 2213 are bore code 13, giving 13 × 5 = 65 mm bore. The 120 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2213K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2213. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 65 mm bore?", "a": "The 22xx is the wide light section: 120×31 mm with a 27.5 mm radial section at 65 mm bore, wider than a 1213 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1313", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 140, "B_mm": 33, "seal_type": "open", "dynamic_load_kN": 62.5, "static_load_kN": 22.9, "fatigue_load_limit_kN": 0.67, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 2470, "manufacturer_designation": "1313S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1313S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1313 carries bore code 13 = 65 mm. Outside diameter 140 mm and width 33 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1313 with C3 for those conditions.", "The 13xx medium section at 65 mm bore gains rating through a larger 140 mm OD and 33 mm width; verify the housing accepts the larger envelope before substituting for a 1213.", "The open 1313 has no lubricant retention: grease escapes and contaminants migrate straight into the 65×140×33 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1313 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1313." ], "faq": [ { "q": "What are the dimensions of a 1313 self-aligning ball bearing?", "a": "A 1313 self-aligning ball bearing has a 65 mm bore, 140 mm outer diameter and 33 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1313 bore code work?", "a": "The last two digits of 1313 are bore code 13, giving 13 × 5 = 65 mm bore. The 140 mm outside diameter and 33 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1313?", "a": "A bare 1313 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 65 mm bore?", "a": "The 13xx is the medium section: 140×33 mm, 37.5 mm radial section at 65 mm bore, carrying more load than a 1213 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1313K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 140, "B_mm": 33, "seal_type": "open", "dynamic_load_kN": 62.5, "static_load_kN": 22.9, "fatigue_load_limit_kN": 0.67, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 2470, "manufacturer_designation": "1313SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1313SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1313 carries bore code 13 = 65 mm. Outside diameter 140 mm and width 33 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1313. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1313 with C3 for those conditions.", "The 13xx medium section at 65 mm bore gains rating through a larger 140 mm OD and 33 mm width; verify the housing accepts the larger envelope before substituting for a 1213.", "Tapered-bore 1313K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 65 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1313-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1313K self-aligning ball bearing?", "a": "A 1313K self-aligning ball bearing has a 65 mm bore, 140 mm outer diameter and 33 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1313." }, { "q": "How does the 1313 bore code work?", "a": "The last two digits of 1313 are bore code 13, giving 13 × 5 = 65 mm bore. The 140 mm outside diameter and 33 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1313K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1313. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 65 mm bore?", "a": "The 13xx is the medium section: 140×33 mm, 37.5 mm radial section at 65 mm bore, carrying more load than a 1213 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2313", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 140, "B_mm": 48, "seal_type": "open", "dynamic_load_kN": 97, "static_load_kN": 32.5, "fatigue_load_limit_kN": 1.4, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4800, "weight_g": 3200, "manufacturer_designation": "2313S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2313S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2313 carries bore code 13 = 65 mm. Outside diameter 140 mm and width 48 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2313 with C3 for those conditions.", "The 23xx heavy wide-section at 65 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2313 has no lubricant retention: grease escapes and contaminants migrate straight into the 65×140×48 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2313 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2313-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2313 self-aligning ball bearing?", "a": "A 2313 self-aligning ball bearing has a 65 mm bore, 140 mm outer diameter and 48 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2313 bore code work?", "a": "The last two digits of 2313 are bore code 13, giving 13 × 5 = 65 mm bore. The 140 mm outside diameter and 48 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2313?", "a": "A bare 2313 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 65 mm bore?", "a": "The 23xx is the wide heavy section: 140×48 mm, 37.5 mm radial section at 65 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2313K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 65, "D_mm": 140, "B_mm": 48, "seal_type": "open", "dynamic_load_kN": 97, "static_load_kN": 32.5, "fatigue_load_limit_kN": 1.4, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4800, "weight_g": 3200, "manufacturer_designation": "2313SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2313SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2313 carries bore code 13 = 65 mm. Outside diameter 140 mm and width 48 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2313. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 65 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2313 with C3 for those conditions.", "The 23xx heavy wide-section at 65 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2313K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 65 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 48 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2313K self-aligning ball bearing?", "a": "A 2313K self-aligning ball bearing has a 65 mm bore, 140 mm outer diameter and 48 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2313." }, { "q": "How does the 2313 bore code work?", "a": "The last two digits of 2313 are bore code 13, giving 13 × 5 = 65 mm bore. The 140 mm outside diameter and 48 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2313K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2313. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 65 mm bore?", "a": "The 23xx is the wide heavy section: 140×48 mm, 37.5 mm radial section at 65 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1214", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 70, "D_mm": 125, "B_mm": 24, "seal_type": "open", "dynamic_load_kN": 35, "static_load_kN": 13.8, "fatigue_load_limit_kN": 0.55, "limiting_speed_rpm": 4800, "speed_oil_rpm": 5600, "weight_g": 1300, "manufacturer_designation": "1214S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1214S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1214 carries bore code 14 = 70 mm. Outside diameter 125 mm and width 24 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 70 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1214 with C3 for those conditions.", "The 12xx light section at 70 mm bore uses a smaller 125 mm OD than a 1314; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1214 has no lubricant retention: grease escapes and contaminants migrate straight into the 70×125×24 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1214 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1214." ], "faq": [ { "q": "What are the dimensions of a 1214 self-aligning ball bearing?", "a": "A 1214 self-aligning ball bearing has a 70 mm bore, 125 mm outer diameter and 24 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1214 bore code work?", "a": "The last two digits of 1214 are bore code 14, giving 14 × 5 = 70 mm bore. The 125 mm outside diameter and 24 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1214?", "a": "A bare 1214 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 70 mm bore?", "a": "The 12xx is the light section: 125×24 mm with a 27.5 mm radial section at 70 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2214", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 70, "D_mm": 125, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 44, "static_load_kN": 17.1, "fatigue_load_limit_kN": 1.1, "limiting_speed_rpm": 4500, "speed_oil_rpm": 5600, "weight_g": 1550, "manufacturer_designation": "2214S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2214S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2214 carries bore code 14 = 70 mm. Outside diameter 125 mm and width 31 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 70 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2214 with C3 for those conditions.", "The 22xx wide-section at 70 mm bore adds load capacity through increased 31 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1214.", "The open 2214 has no lubricant retention: grease escapes and contaminants migrate straight into the 70×125×31 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2214 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2214-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2214 self-aligning ball bearing?", "a": "A 2214 self-aligning ball bearing has a 70 mm bore, 125 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2214 bore code work?", "a": "The last two digits of 2214 are bore code 14, giving 14 × 5 = 70 mm bore. The 125 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2214?", "a": "A bare 2214 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 70 mm bore?", "a": "The 22xx is the wide light section: 125×31 mm with a 27.5 mm radial section at 70 mm bore, wider than a 1214 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1314", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 70, "D_mm": 150, "B_mm": 35, "seal_type": "open", "dynamic_load_kN": 75, "static_load_kN": 27.7, "fatigue_load_limit_kN": 0.69, "limiting_speed_rpm": 4000, "speed_oil_rpm": 5000, "weight_g": 3030, "manufacturer_designation": "1314S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1314S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1314 carries bore code 14 = 70 mm. Outside diameter 150 mm and width 35 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 70 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1314 with C3 for those conditions.", "The 13xx medium section at 70 mm bore gains rating through a larger 150 mm OD and 35 mm width; verify the housing accepts the larger envelope before substituting for a 1214.", "The open 1314 has no lubricant retention: grease escapes and contaminants migrate straight into the 70×150×35 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1314 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1314 self-aligning ball bearing?", "a": "A 1314 self-aligning ball bearing has a 70 mm bore, 150 mm outer diameter and 35 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1314 bore code work?", "a": "The last two digits of 1314 are bore code 14, giving 14 × 5 = 70 mm bore. The 150 mm outside diameter and 35 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1314?", "a": "A bare 1314 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 70 mm bore?", "a": "The 13xx is the medium section: 150×35 mm, 40.0 mm radial section at 70 mm bore, carrying more load than a 1214 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2314", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 70, "D_mm": 150, "B_mm": 51, "seal_type": "open", "dynamic_load_kN": 111, "static_load_kN": 37.5, "fatigue_load_limit_kN": 1.6, "limiting_speed_rpm": 3600, "speed_oil_rpm": 4500, "weight_g": 3900, "manufacturer_designation": "2314S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2314S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2314 carries bore code 14 = 70 mm. Outside diameter 150 mm and width 51 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 70 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2314 with C3 for those conditions.", "The 23xx heavy wide-section at 70 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2314 has no lubricant retention: grease escapes and contaminants migrate straight into the 70×150×51 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2314 units.", "A 70 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2314 self-aligning ball bearing?", "a": "A 2314 self-aligning ball bearing has a 70 mm bore, 150 mm outer diameter and 51 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2314 bore code work?", "a": "The last two digits of 2314 are bore code 14, giving 14 × 5 = 70 mm bore. The 150 mm outside diameter and 51 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2314?", "a": "A bare 2314 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 70 mm bore?", "a": "The 23xx is the wide heavy section: 150×51 mm, 40.0 mm radial section at 70 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1215", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 130, "B_mm": 25, "seal_type": "open", "dynamic_load_kN": 39, "static_load_kN": 15.7, "fatigue_load_limit_kN": 0.63, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 1360, "manufacturer_designation": "1215S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1215S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1215 carries bore code 15 = 75 mm. Outside diameter 130 mm and width 25 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1215 with C3 for those conditions.", "The 12xx light section at 75 mm bore uses a smaller 130 mm OD than a 1315; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1215 has no lubricant retention: grease escapes and contaminants migrate straight into the 75×130×25 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1215 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1215 self-aligning ball bearing?", "a": "A 1215 self-aligning ball bearing has a 75 mm bore, 130 mm outer diameter and 25 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1215 bore code work?", "a": "The last two digits of 1215 are bore code 15, giving 15 × 5 = 75 mm bore. The 130 mm outside diameter and 25 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1215?", "a": "A bare 1215 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 75 mm bore?", "a": "The 12xx is the light section: 130×25 mm with a 27.5 mm radial section at 75 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1215K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 130, "B_mm": 25, "seal_type": "open", "dynamic_load_kN": 39, "static_load_kN": 15.7, "fatigue_load_limit_kN": 0.63, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 1360, "manufacturer_designation": "1215SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1215SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1215 carries bore code 15 = 75 mm. Outside diameter 130 mm and width 25 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1215. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1215 with C3 for those conditions.", "The 12xx light section at 75 mm bore uses a smaller 130 mm OD than a 1315; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1215K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 75 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 75 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1215K self-aligning ball bearing?", "a": "A 1215K self-aligning ball bearing has a 75 mm bore, 130 mm outer diameter and 25 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1215." }, { "q": "How does the 1215 bore code work?", "a": "The last two digits of 1215 are bore code 15, giving 15 × 5 = 75 mm bore. The 130 mm outside diameter and 25 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1215K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1215. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 75 mm bore?", "a": "The 12xx is the light section: 130×25 mm with a 27.5 mm radial section at 75 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2215", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 130, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 44.5, "static_load_kN": 17.8, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 1600, "manufacturer_designation": "2215S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2215S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2215 carries bore code 15 = 75 mm. Outside diameter 130 mm and width 31 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2215 with C3 for those conditions.", "The 22xx wide-section at 75 mm bore adds load capacity through increased 31 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1215.", "The open 2215 has no lubricant retention: grease escapes and contaminants migrate straight into the 75×130×31 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2215 units.", "A 75 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2215 self-aligning ball bearing?", "a": "A 2215 self-aligning ball bearing has a 75 mm bore, 130 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2215 bore code work?", "a": "The last two digits of 2215 are bore code 15, giving 15 × 5 = 75 mm bore. The 130 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2215?", "a": "A bare 2215 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 75 mm bore?", "a": "The 22xx is the wide light section: 130×31 mm with a 27.5 mm radial section at 75 mm bore, wider than a 1215 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2215K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 130, "B_mm": 31, "seal_type": "open", "dynamic_load_kN": 44.5, "static_load_kN": 17.8, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 4300, "speed_oil_rpm": 5300, "weight_g": 1600, "manufacturer_designation": "2215SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2215SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2215 carries bore code 15 = 75 mm. Outside diameter 130 mm and width 31 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2215. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "gearbox and speed reducer shafts", "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2215 with C3 for those conditions.", "The 22xx wide-section at 75 mm bore adds load capacity through increased 31 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1215.", "Tapered-bore 2215K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 75 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2215K." ], "faq": [ { "q": "What are the dimensions of a 2215K self-aligning ball bearing?", "a": "A 2215K self-aligning ball bearing has a 75 mm bore, 130 mm outer diameter and 31 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2215." }, { "q": "How does the 2215 bore code work?", "a": "The last two digits of 2215 are bore code 15, giving 15 × 5 = 75 mm bore. The 130 mm outside diameter and 31 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2215K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2215. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 75 mm bore?", "a": "The 22xx is the wide light section: 130×31 mm with a 27.5 mm radial section at 75 mm bore, wider than a 1215 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1315", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 160, "B_mm": 37, "seal_type": "open", "dynamic_load_kN": 80, "static_load_kN": 30, "fatigue_load_limit_kN": 0.72, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4500, "weight_g": 3630, "manufacturer_designation": "1315S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1315S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1315 carries bore code 15 = 75 mm. Outside diameter 160 mm and width 37 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1315 with C3 for those conditions.", "The 13xx medium section at 75 mm bore gains rating through a larger 160 mm OD and 37 mm width; verify the housing accepts the larger envelope before substituting for a 1215.", "The open 1315 has no lubricant retention: grease escapes and contaminants migrate straight into the 75×160×37 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1315 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1315-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1315 self-aligning ball bearing?", "a": "A 1315 self-aligning ball bearing has a 75 mm bore, 160 mm outer diameter and 37 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1315 bore code work?", "a": "The last two digits of 1315 are bore code 15, giving 15 × 5 = 75 mm bore. The 160 mm outside diameter and 37 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1315?", "a": "A bare 1315 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 75 mm bore?", "a": "The 13xx is the medium section: 160×37 mm, 42.5 mm radial section at 75 mm bore, carrying more load than a 1215 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1315K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 160, "B_mm": 37, "seal_type": "open", "dynamic_load_kN": 80, "static_load_kN": 30, "fatigue_load_limit_kN": 0.72, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4500, "weight_g": 3630, "manufacturer_designation": "1315SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1315SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1315 carries bore code 15 = 75 mm. Outside diameter 160 mm and width 37 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1315. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial electric motor shafts", "pump and compressor drive shafts", "gearbox and speed reducer shafts", "conveyor and material handling drives" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 1315 with C3 for those conditions.", "The 13xx medium section at 75 mm bore gains rating through a larger 160 mm OD and 37 mm width; verify the housing accepts the larger envelope before substituting for a 1215.", "Tapered-bore 1315K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 75 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 37 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1315K self-aligning ball bearing?", "a": "A 1315K self-aligning ball bearing has a 75 mm bore, 160 mm outer diameter and 37 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1315." }, { "q": "How does the 1315 bore code work?", "a": "The last two digits of 1315 are bore code 15, giving 15 × 5 = 75 mm bore. The 160 mm outside diameter and 37 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1315K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1315. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 75 mm bore?", "a": "The 13xx is the medium section: 160×37 mm, 42.5 mm radial section at 75 mm bore, carrying more load than a 1215 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2315", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 160, "B_mm": 55, "seal_type": "open", "dynamic_load_kN": 125, "static_load_kN": 43, "fatigue_load_limit_kN": 1.8, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4300, "weight_g": 4780, "manufacturer_designation": "2315S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2315S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2315 carries bore code 15 = 75 mm. Outside diameter 160 mm and width 55 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "conveyor and material handling drives", "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2315 with C3 for those conditions.", "The 23xx heavy wide-section at 75 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2315 has no lubricant retention: grease escapes and contaminants migrate straight into the 75×160×55 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2315 units.", "Shaft and housing fillets must clear the bearing chamfer so the 55 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2315 self-aligning ball bearing?", "a": "A 2315 self-aligning ball bearing has a 75 mm bore, 160 mm outer diameter and 55 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2315 bore code work?", "a": "The last two digits of 2315 are bore code 15, giving 15 × 5 = 75 mm bore. The 160 mm outside diameter and 55 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2315?", "a": "A bare 2315 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 75 mm bore?", "a": "The 23xx is the wide heavy section: 160×55 mm, 42.5 mm radial section at 75 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2315K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 75, "D_mm": 160, "B_mm": 55, "seal_type": "open", "dynamic_load_kN": 125, "static_load_kN": 43, "fatigue_load_limit_kN": 1.8, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4300, "weight_g": 4780, "manufacturer_designation": "2315SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2315SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2315 carries bore code 15 = 75 mm. Outside diameter 160 mm and width 55 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2315. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "textile and printing machine spindles", "paper mill and processing equipment shafts", "industrial electric motor shafts", "pump and compressor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Temperature rise and interference fits consume internal clearance on this 75 mm bore: a CN bearing on a tight, hot shaft can lose all residual clearance — size 2315 with C3 for those conditions.", "The 23xx heavy wide-section at 75 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2315K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 75 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2315K." ], "faq": [ { "q": "What are the dimensions of a 2315K self-aligning ball bearing?", "a": "A 2315K self-aligning ball bearing has a 75 mm bore, 160 mm outer diameter and 55 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2315." }, { "q": "How does the 2315 bore code work?", "a": "The last two digits of 2315 are bore code 15, giving 15 × 5 = 75 mm bore. The 160 mm outside diameter and 55 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2315K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2315. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 75 mm bore?", "a": "The 23xx is the wide heavy section: 160×55 mm, 42.5 mm radial section at 75 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1216", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 140, "B_mm": 26, "seal_type": "open", "dynamic_load_kN": 40, "static_load_kN": 17, "fatigue_load_limit_kN": 0.68, "limiting_speed_rpm": 4000, "speed_oil_rpm": 5000, "weight_g": 1680, "manufacturer_designation": "1216S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1216S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1216 carries bore code 16 = 80 mm. Outside diameter 140 mm and width 26 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 80 mm bore uses a smaller 140 mm OD than a 1316; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1216 has no lubricant retention: grease escapes and contaminants migrate straight into the 80×140×26 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1216 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1216-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1216 self-aligning ball bearing?", "a": "A 1216 self-aligning ball bearing has a 80 mm bore, 140 mm outer diameter and 26 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1216 bore code work?", "a": "The last two digits of 1216 are bore code 16, giving 16 × 5 = 80 mm bore. The 140 mm outside diameter and 26 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1216?", "a": "A bare 1216 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 80 mm bore?", "a": "The 12xx is the light section: 140×26 mm with a 30.0 mm radial section at 80 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1216K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 140, "B_mm": 26, "seal_type": "open", "dynamic_load_kN": 40, "static_load_kN": 17, "fatigue_load_limit_kN": 0.68, "limiting_speed_rpm": 4000, "speed_oil_rpm": 5000, "weight_g": 1680, "manufacturer_designation": "1216SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1216SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1216 carries bore code 16 = 80 mm. Outside diameter 140 mm and width 26 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1216. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 80 mm bore uses a smaller 140 mm OD than a 1316; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1216K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 80 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 26 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1216K self-aligning ball bearing?", "a": "A 1216K self-aligning ball bearing has a 80 mm bore, 140 mm outer diameter and 26 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1216." }, { "q": "How does the 1216 bore code work?", "a": "The last two digits of 1216 are bore code 16, giving 16 × 5 = 80 mm bore. The 140 mm outside diameter and 26 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1216K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1216. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 80 mm bore?", "a": "The 12xx is the light section: 140×26 mm with a 30.0 mm radial section at 80 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2216", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 140, "B_mm": 33, "seal_type": "open", "dynamic_load_kN": 49, "static_load_kN": 19.9, "fatigue_load_limit_kN": 1.3, "limiting_speed_rpm": 4000, "speed_oil_rpm": 5000, "weight_g": 2020, "manufacturer_designation": "2216S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2216S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2216 carries bore code 16 = 80 mm. Outside diameter 140 mm and width 33 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 80 mm bore adds load capacity through increased 33 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1216.", "The open 2216 has no lubricant retention: grease escapes and contaminants migrate straight into the 80×140×33 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2216 units.", "Shaft and housing fillets must clear the bearing chamfer so the 33 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2216 self-aligning ball bearing?", "a": "A 2216 self-aligning ball bearing has a 80 mm bore, 140 mm outer diameter and 33 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2216 bore code work?", "a": "The last two digits of 2216 are bore code 16, giving 16 × 5 = 80 mm bore. The 140 mm outside diameter and 33 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2216?", "a": "A bare 2216 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 80 mm bore?", "a": "The 22xx is the wide light section: 140×33 mm with a 30.0 mm radial section at 80 mm bore, wider than a 1216 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2216K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 140, "B_mm": 33, "seal_type": "open", "dynamic_load_kN": 49, "static_load_kN": 19.9, "fatigue_load_limit_kN": 1.3, "limiting_speed_rpm": 4000, "speed_oil_rpm": 5000, "weight_g": 2020, "manufacturer_designation": "2216SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2216SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2216 carries bore code 16 = 80 mm. Outside diameter 140 mm and width 33 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2216. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 80 mm bore adds load capacity through increased 33 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1216.", "Tapered-bore 2216K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 80 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2216K." ], "faq": [ { "q": "What are the dimensions of a 2216K self-aligning ball bearing?", "a": "A 2216K self-aligning ball bearing has a 80 mm bore, 140 mm outer diameter and 33 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2216." }, { "q": "How does the 2216 bore code work?", "a": "The last two digits of 2216 are bore code 16, giving 16 × 5 = 80 mm bore. The 140 mm outside diameter and 33 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2216K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2216. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 80 mm bore?", "a": "The 22xx is the wide light section: 140×33 mm with a 30.0 mm radial section at 80 mm bore, wider than a 1216 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1316", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 170, "B_mm": 39, "seal_type": "open", "dynamic_load_kN": 89, "static_load_kN": 33, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 3600, "speed_oil_rpm": 4300, "weight_g": 4240, "manufacturer_designation": "1316S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1316S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1316 carries bore code 16 = 80 mm. Outside diameter 170 mm and width 39 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 80 mm bore gains rating through a larger 170 mm OD and 39 mm width; verify the housing accepts the larger envelope before substituting for a 1216.", "The open 1316 has no lubricant retention: grease escapes and contaminants migrate straight into the 80×170×39 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1316 units.", "A 80 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1316 self-aligning ball bearing?", "a": "A 1316 self-aligning ball bearing has a 80 mm bore, 170 mm outer diameter and 39 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1316 bore code work?", "a": "The last two digits of 1316 are bore code 16, giving 16 × 5 = 80 mm bore. The 170 mm outside diameter and 39 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1316?", "a": "A bare 1316 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 80 mm bore?", "a": "The 13xx is the medium section: 170×39 mm, 45.0 mm radial section at 80 mm bore, carrying more load than a 1216 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1316K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 170, "B_mm": 39, "seal_type": "open", "dynamic_load_kN": 89, "static_load_kN": 33, "fatigue_load_limit_kN": 0.8, "limiting_speed_rpm": 3600, "speed_oil_rpm": 4300, "weight_g": 4240, "manufacturer_designation": "1316SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1316SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1316 carries bore code 16 = 80 mm. Outside diameter 170 mm and width 39 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1316. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 80 mm bore gains rating through a larger 170 mm OD and 39 mm width; verify the housing accepts the larger envelope before substituting for a 1216.", "Tapered-bore 1316K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 80 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1316K." ], "faq": [ { "q": "What are the dimensions of a 1316K self-aligning ball bearing?", "a": "A 1316K self-aligning ball bearing has a 80 mm bore, 170 mm outer diameter and 39 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1316." }, { "q": "How does the 1316 bore code work?", "a": "The last two digits of 1316 are bore code 16, giving 16 × 5 = 80 mm bore. The 170 mm outside diameter and 39 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1316K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1316. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 80 mm bore?", "a": "The 13xx is the medium section: 170×39 mm, 45.0 mm radial section at 80 mm bore, carrying more load than a 1216 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2316", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 170, "B_mm": 58, "seal_type": "open", "dynamic_load_kN": 130, "static_load_kN": 45, "fatigue_load_limit_kN": 1.9, "limiting_speed_rpm": 3200, "speed_oil_rpm": 4000, "weight_g": 5630, "manufacturer_designation": "2316S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2316S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2316 carries bore code 16 = 80 mm. Outside diameter 170 mm and width 58 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 80 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2316 has no lubricant retention: grease escapes and contaminants migrate straight into the 80×170×58 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2316 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2316." ], "faq": [ { "q": "What are the dimensions of a 2316 self-aligning ball bearing?", "a": "A 2316 self-aligning ball bearing has a 80 mm bore, 170 mm outer diameter and 58 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2316 bore code work?", "a": "The last two digits of 2316 are bore code 16, giving 16 × 5 = 80 mm bore. The 170 mm outside diameter and 58 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2316?", "a": "A bare 2316 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 80 mm bore?", "a": "The 23xx is the wide heavy section: 170×58 mm, 45.0 mm radial section at 80 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2316K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 80, "D_mm": 170, "B_mm": 58, "seal_type": "open", "dynamic_load_kN": 130, "static_load_kN": 45, "fatigue_load_limit_kN": 1.9, "limiting_speed_rpm": 3200, "speed_oil_rpm": 4000, "weight_g": 5630, "manufacturer_designation": "2316SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2316SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2316 carries bore code 16 = 80 mm. Outside diameter 170 mm and width 58 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2316. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 80 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2316K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 80 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2316K self-aligning ball bearing?", "a": "A 2316K self-aligning ball bearing has a 80 mm bore, 170 mm outer diameter and 58 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2316." }, { "q": "How does the 2316 bore code work?", "a": "The last two digits of 2316 are bore code 16, giving 16 × 5 = 80 mm bore. The 170 mm outside diameter and 58 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2316K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2316. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 80 mm bore?", "a": "The 23xx is the wide heavy section: 170×58 mm, 45.0 mm radial section at 80 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1217", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 150, "B_mm": 28, "seal_type": "open", "dynamic_load_kN": 49.5, "static_load_kN": 20.8, "fatigue_load_limit_kN": 0.83, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4500, "weight_g": 2100, "manufacturer_designation": "1217S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1217S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1217 carries bore code 17 = 85 mm. Outside diameter 150 mm and width 28 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 85 mm bore uses a smaller 150 mm OD than a 1317; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1217 has no lubricant retention: grease escapes and contaminants migrate straight into the 85×150×28 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1217 units.", "A 85 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1217 self-aligning ball bearing?", "a": "A 1217 self-aligning ball bearing has a 85 mm bore, 150 mm outer diameter and 28 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1217 bore code work?", "a": "The last two digits of 1217 are bore code 17, giving 17 × 5 = 85 mm bore. The 150 mm outside diameter and 28 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1217?", "a": "A bare 1217 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 85 mm bore?", "a": "The 12xx is the light section: 150×28 mm with a 32.5 mm radial section at 85 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1217K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 150, "B_mm": 28, "seal_type": "open", "dynamic_load_kN": 49.5, "static_load_kN": 20.8, "fatigue_load_limit_kN": 0.83, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4500, "weight_g": 2100, "manufacturer_designation": "1217SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1217SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1217 carries bore code 17 = 85 mm. Outside diameter 150 mm and width 28 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1217. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 85 mm bore uses a smaller 150 mm OD than a 1317; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1217K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 85 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1217K." ], "faq": [ { "q": "What are the dimensions of a 1217K self-aligning ball bearing?", "a": "A 1217K self-aligning ball bearing has a 85 mm bore, 150 mm outer diameter and 28 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1217." }, { "q": "How does the 1217 bore code work?", "a": "The last two digits of 1217 are bore code 17, giving 17 × 5 = 85 mm bore. The 150 mm outside diameter and 28 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1217K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1217. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 85 mm bore?", "a": "The 12xx is the light section: 150×28 mm with a 32.5 mm radial section at 85 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2217", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 150, "B_mm": 36, "seal_type": "open", "dynamic_load_kN": 58.5, "static_load_kN": 23.6, "fatigue_load_limit_kN": 1.5, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4800, "weight_g": 2560, "manufacturer_designation": "2217S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2217S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2217 carries bore code 17 = 85 mm. Outside diameter 150 mm and width 36 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 85 mm bore adds load capacity through increased 36 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1217.", "The open 2217 has no lubricant retention: grease escapes and contaminants migrate straight into the 85×150×36 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2217 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2217." ], "faq": [ { "q": "What are the dimensions of a 2217 self-aligning ball bearing?", "a": "A 2217 self-aligning ball bearing has a 85 mm bore, 150 mm outer diameter and 36 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2217 bore code work?", "a": "The last two digits of 2217 are bore code 17, giving 17 × 5 = 85 mm bore. The 150 mm outside diameter and 36 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2217?", "a": "A bare 2217 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 85 mm bore?", "a": "The 22xx is the wide light section: 150×36 mm with a 32.5 mm radial section at 85 mm bore, wider than a 1217 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2217K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 150, "B_mm": 36, "seal_type": "open", "dynamic_load_kN": 58.5, "static_load_kN": 23.6, "fatigue_load_limit_kN": 1.5, "limiting_speed_rpm": 3800, "speed_oil_rpm": 4800, "weight_g": 2560, "manufacturer_designation": "2217SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2217SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2217 carries bore code 17 = 85 mm. Outside diameter 150 mm and width 36 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2217. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 85 mm bore adds load capacity through increased 36 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1217.", "Tapered-bore 2217K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 85 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2217K self-aligning ball bearing?", "a": "A 2217K self-aligning ball bearing has a 85 mm bore, 150 mm outer diameter and 36 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2217." }, { "q": "How does the 2217 bore code work?", "a": "The last two digits of 2217 are bore code 17, giving 17 × 5 = 85 mm bore. The 150 mm outside diameter and 36 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2217K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2217. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 85 mm bore?", "a": "The 22xx is the wide light section: 150×36 mm with a 32.5 mm radial section at 85 mm bore, wider than a 1217 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1317", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 180, "B_mm": 41, "seal_type": "open", "dynamic_load_kN": 98.5, "static_load_kN": 38, "fatigue_load_limit_kN": 0.95, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4000, "weight_g": 5030, "manufacturer_designation": "1317S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1317S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1317 carries bore code 17 = 85 mm. Outside diameter 180 mm and width 41 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 85 mm bore gains rating through a larger 180 mm OD and 41 mm width; verify the housing accepts the larger envelope before substituting for a 1217.", "The open 1317 has no lubricant retention: grease escapes and contaminants migrate straight into the 85×180×41 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1317 units.", "Shaft and housing fillets must clear the bearing chamfer so the 41 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1317 self-aligning ball bearing?", "a": "A 1317 self-aligning ball bearing has a 85 mm bore, 180 mm outer diameter and 41 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1317 bore code work?", "a": "The last two digits of 1317 are bore code 17, giving 17 × 5 = 85 mm bore. The 180 mm outside diameter and 41 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1317?", "a": "A bare 1317 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 85 mm bore?", "a": "The 13xx is the medium section: 180×41 mm, 47.5 mm radial section at 85 mm bore, carrying more load than a 1217 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1317K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 180, "B_mm": 41, "seal_type": "open", "dynamic_load_kN": 98.5, "static_load_kN": 38, "fatigue_load_limit_kN": 0.95, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4000, "weight_g": 5030, "manufacturer_designation": "1317SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1317SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1317 carries bore code 17 = 85 mm. Outside diameter 180 mm and width 41 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1317. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 85 mm bore gains rating through a larger 180 mm OD and 41 mm width; verify the housing accepts the larger envelope before substituting for a 1217.", "Tapered-bore 1317K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 85 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1317K." ], "faq": [ { "q": "What are the dimensions of a 1317K self-aligning ball bearing?", "a": "A 1317K self-aligning ball bearing has a 85 mm bore, 180 mm outer diameter and 41 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1317." }, { "q": "How does the 1317 bore code work?", "a": "The last two digits of 1317 are bore code 17, giving 17 × 5 = 85 mm bore. The 180 mm outside diameter and 41 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1317K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1317. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 85 mm bore?", "a": "The 13xx is the medium section: 180×41 mm, 47.5 mm radial section at 85 mm bore, carrying more load than a 1217 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2317", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 180, "B_mm": 60, "seal_type": "open", "dynamic_load_kN": 142, "static_load_kN": 51.5, "fatigue_load_limit_kN": 2.1, "limiting_speed_rpm": 3000, "speed_oil_rpm": 3800, "weight_g": 6560, "manufacturer_designation": "2317S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2317S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2317 carries bore code 17 = 85 mm. Outside diameter 180 mm and width 60 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 85 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2317 has no lubricant retention: grease escapes and contaminants migrate straight into the 85×180×60 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2317 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2317." ], "faq": [ { "q": "What are the dimensions of a 2317 self-aligning ball bearing?", "a": "A 2317 self-aligning ball bearing has a 85 mm bore, 180 mm outer diameter and 60 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2317 bore code work?", "a": "The last two digits of 2317 are bore code 17, giving 17 × 5 = 85 mm bore. The 180 mm outside diameter and 60 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2317?", "a": "A bare 2317 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 85 mm bore?", "a": "The 23xx is the wide heavy section: 180×60 mm, 47.5 mm radial section at 85 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2317K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 85, "D_mm": 180, "B_mm": 60, "seal_type": "open", "dynamic_load_kN": 142, "static_load_kN": 51.5, "fatigue_load_limit_kN": 2.1, "limiting_speed_rpm": 3000, "speed_oil_rpm": 3800, "weight_g": 6560, "manufacturer_designation": "2317SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2317SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2317 carries bore code 17 = 85 mm. Outside diameter 180 mm and width 60 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2317. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 85 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 85 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2317K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 85 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2317-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2317K self-aligning ball bearing?", "a": "A 2317K self-aligning ball bearing has a 85 mm bore, 180 mm outer diameter and 60 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2317." }, { "q": "How does the 2317 bore code work?", "a": "The last two digits of 2317 are bore code 17, giving 17 × 5 = 85 mm bore. The 180 mm outside diameter and 60 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2317K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2317. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 85 mm bore?", "a": "The 23xx is the wide heavy section: 180×60 mm, 47.5 mm radial section at 85 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1218", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 160, "B_mm": 30, "seal_type": "open", "dynamic_load_kN": 57.5, "static_load_kN": 23.5, "fatigue_load_limit_kN": 0.94, "limiting_speed_rpm": 3600, "speed_oil_rpm": 4300, "weight_g": 2560, "manufacturer_designation": "1218S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1218S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1218 carries bore code 18 = 90 mm. Outside diameter 160 mm and width 30 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 90 mm bore uses a smaller 160 mm OD than a 1318; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1218 has no lubricant retention: grease escapes and contaminants migrate straight into the 90×160×30 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1218 units.", "Shaft and housing fillets must clear the bearing chamfer so the 30 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1218 self-aligning ball bearing?", "a": "A 1218 self-aligning ball bearing has a 90 mm bore, 160 mm outer diameter and 30 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1218 bore code work?", "a": "The last two digits of 1218 are bore code 18, giving 18 × 5 = 90 mm bore. The 160 mm outside diameter and 30 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1218?", "a": "A bare 1218 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 90 mm bore?", "a": "The 12xx is the light section: 160×30 mm with a 35.0 mm radial section at 90 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1218K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 160, "B_mm": 30, "seal_type": "open", "dynamic_load_kN": 57.5, "static_load_kN": 23.5, "fatigue_load_limit_kN": 0.94, "limiting_speed_rpm": 3600, "speed_oil_rpm": 4300, "weight_g": 2560, "manufacturer_designation": "1218SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1218SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1218 carries bore code 18 = 90 mm. Outside diameter 160 mm and width 30 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1218. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 90 mm bore uses a smaller 160 mm OD than a 1318; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1218K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 90 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1218K." ], "faq": [ { "q": "What are the dimensions of a 1218K self-aligning ball bearing?", "a": "A 1218K self-aligning ball bearing has a 90 mm bore, 160 mm outer diameter and 30 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1218." }, { "q": "How does the 1218 bore code work?", "a": "The last two digits of 1218 are bore code 18, giving 18 × 5 = 90 mm bore. The 160 mm outside diameter and 30 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1218K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1218. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 90 mm bore?", "a": "The 12xx is the light section: 160×30 mm with a 35.0 mm radial section at 90 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2218", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 160, "B_mm": 40, "seal_type": "open", "dynamic_load_kN": 70.5, "static_load_kN": 28.7, "fatigue_load_limit_kN": 1.8, "limiting_speed_rpm": 3600, "speed_oil_rpm": 4300, "weight_g": 3220, "manufacturer_designation": "2218S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2218S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2218 carries bore code 18 = 90 mm. Outside diameter 160 mm and width 40 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 90 mm bore adds load capacity through increased 40 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1218.", "The open 2218 has no lubricant retention: grease escapes and contaminants migrate straight into the 90×160×40 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2218 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2218." ], "faq": [ { "q": "What are the dimensions of a 2218 self-aligning ball bearing?", "a": "A 2218 self-aligning ball bearing has a 90 mm bore, 160 mm outer diameter and 40 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2218 bore code work?", "a": "The last two digits of 2218 are bore code 18, giving 18 × 5 = 90 mm bore. The 160 mm outside diameter and 40 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2218?", "a": "A bare 2218 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 90 mm bore?", "a": "The 22xx is the wide light section: 160×40 mm with a 35.0 mm radial section at 90 mm bore, wider than a 1218 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2218K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 160, "B_mm": 40, "seal_type": "open", "dynamic_load_kN": 70.5, "static_load_kN": 28.7, "fatigue_load_limit_kN": 1.8, "limiting_speed_rpm": 3600, "speed_oil_rpm": 4300, "weight_g": 3220, "manufacturer_designation": "2218SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2218SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2218 carries bore code 18 = 90 mm. Outside diameter 160 mm and width 40 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2218. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 90 mm bore adds load capacity through increased 40 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1218.", "Tapered-bore 2218K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 90 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2218-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2218K self-aligning ball bearing?", "a": "A 2218K self-aligning ball bearing has a 90 mm bore, 160 mm outer diameter and 40 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2218." }, { "q": "How does the 2218 bore code work?", "a": "The last two digits of 2218 are bore code 18, giving 18 × 5 = 90 mm bore. The 160 mm outside diameter and 40 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2218K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2218. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 90 mm bore?", "a": "The 22xx is the wide light section: 160×40 mm with a 35.0 mm radial section at 90 mm bore, wider than a 1218 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1318", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 190, "B_mm": 43, "seal_type": "open", "dynamic_load_kN": 117, "static_load_kN": 44.5, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 3200, "speed_oil_rpm": 3800, "weight_g": 5830, "manufacturer_designation": "1318S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1318S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1318 carries bore code 18 = 90 mm. Outside diameter 190 mm and width 43 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 90 mm bore gains rating through a larger 190 mm OD and 43 mm width; verify the housing accepts the larger envelope before substituting for a 1218.", "The open 1318 has no lubricant retention: grease escapes and contaminants migrate straight into the 90×190×43 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1318 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1318." ], "faq": [ { "q": "What are the dimensions of a 1318 self-aligning ball bearing?", "a": "A 1318 self-aligning ball bearing has a 90 mm bore, 190 mm outer diameter and 43 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1318 bore code work?", "a": "The last two digits of 1318 are bore code 18, giving 18 × 5 = 90 mm bore. The 190 mm outside diameter and 43 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1318?", "a": "A bare 1318 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 90 mm bore?", "a": "The 13xx is the medium section: 190×43 mm, 50.0 mm radial section at 90 mm bore, carrying more load than a 1218 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1318K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 190, "B_mm": 43, "seal_type": "open", "dynamic_load_kN": 117, "static_load_kN": 44.5, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 3200, "speed_oil_rpm": 3800, "weight_g": 5830, "manufacturer_designation": "1318SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1318SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1318 carries bore code 18 = 90 mm. Outside diameter 190 mm and width 43 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1318. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 90 mm bore gains rating through a larger 190 mm OD and 43 mm width; verify the housing accepts the larger envelope before substituting for a 1218.", "Tapered-bore 1318K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 90 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1318K self-aligning ball bearing?", "a": "A 1318K self-aligning ball bearing has a 90 mm bore, 190 mm outer diameter and 43 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1318." }, { "q": "How does the 1318 bore code work?", "a": "The last two digits of 1318 are bore code 18, giving 18 × 5 = 90 mm bore. The 190 mm outside diameter and 43 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1318K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1318. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 90 mm bore?", "a": "The 13xx is the medium section: 190×43 mm, 50.0 mm radial section at 90 mm bore, carrying more load than a 1218 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2318", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 190, "B_mm": 64, "seal_type": "open", "dynamic_load_kN": 154, "static_load_kN": 57.5, "fatigue_load_limit_kN": 2.4, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3600, "weight_g": 7750, "manufacturer_designation": "2318S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2318S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2318 carries bore code 18 = 90 mm. Outside diameter 190 mm and width 64 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 90 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2318 has no lubricant retention: grease escapes and contaminants migrate straight into the 90×190×64 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2318 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2318 self-aligning ball bearing?", "a": "A 2318 self-aligning ball bearing has a 90 mm bore, 190 mm outer diameter and 64 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2318 bore code work?", "a": "The last two digits of 2318 are bore code 18, giving 18 × 5 = 90 mm bore. The 190 mm outside diameter and 64 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2318?", "a": "A bare 2318 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 90 mm bore?", "a": "The 23xx is the wide heavy section: 190×64 mm, 50.0 mm radial section at 90 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2318K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 90, "D_mm": 190, "B_mm": 64, "seal_type": "open", "dynamic_load_kN": 154, "static_load_kN": 57.5, "fatigue_load_limit_kN": 2.4, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3600, "weight_g": 7750, "manufacturer_designation": "2318SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2318SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2318 carries bore code 18 = 90 mm. Outside diameter 190 mm and width 64 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2318. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Mount this 90 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 90 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2318K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 90 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 90 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2318K self-aligning ball bearing?", "a": "A 2318K self-aligning ball bearing has a 90 mm bore, 190 mm outer diameter and 64 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2318." }, { "q": "How does the 2318 bore code work?", "a": "The last two digits of 2318 are bore code 18, giving 18 × 5 = 90 mm bore. The 190 mm outside diameter and 64 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2318K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2318. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 90 mm bore?", "a": "The 23xx is the wide heavy section: 190×64 mm, 50.0 mm radial section at 90 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1219", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 170, "B_mm": 32, "seal_type": "open", "dynamic_load_kN": 64, "static_load_kN": 27.1, "fatigue_load_limit_kN": 1.1, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4000, "weight_g": 3120, "manufacturer_designation": "1219S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1219S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1219 carries bore code 19 = 95 mm. Outside diameter 170 mm and width 32 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 95 mm bore uses a smaller 170 mm OD than a 1319; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1219 has no lubricant retention: grease escapes and contaminants migrate straight into the 95×170×32 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1219 units.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1219." ], "faq": [ { "q": "What are the dimensions of a 1219 self-aligning ball bearing?", "a": "A 1219 self-aligning ball bearing has a 95 mm bore, 170 mm outer diameter and 32 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1219 bore code work?", "a": "The last two digits of 1219 are bore code 19, giving 19 × 5 = 95 mm bore. The 170 mm outside diameter and 32 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1219?", "a": "A bare 1219 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 95 mm bore?", "a": "The 12xx is the light section: 170×32 mm with a 37.5 mm radial section at 95 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1219K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 170, "B_mm": 32, "seal_type": "open", "dynamic_load_kN": 64, "static_load_kN": 27.1, "fatigue_load_limit_kN": 1.1, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4000, "weight_g": 3120, "manufacturer_designation": "1219SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1219SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1219 carries bore code 19 = 95 mm. Outside diameter 170 mm and width 32 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1219. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 95 mm bore uses a smaller 170 mm OD than a 1319; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1219K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 95 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1219K self-aligning ball bearing?", "a": "A 1219K self-aligning ball bearing has a 95 mm bore, 170 mm outer diameter and 32 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1219." }, { "q": "How does the 1219 bore code work?", "a": "The last two digits of 1219 are bore code 19, giving 19 × 5 = 95 mm bore. The 170 mm outside diameter and 32 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1219K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1219. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 95 mm bore?", "a": "The 12xx is the light section: 170×32 mm with a 37.5 mm radial section at 95 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2219", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 170, "B_mm": 43, "seal_type": "open", "dynamic_load_kN": 84, "static_load_kN": 34.5, "fatigue_load_limit_kN": 2, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4000, "weight_g": 3960, "manufacturer_designation": "2219S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2219S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2219 carries bore code 19 = 95 mm. Outside diameter 170 mm and width 43 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 95 mm bore adds load capacity through increased 43 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1219.", "The open 2219 has no lubricant retention: grease escapes and contaminants migrate straight into the 95×170×43 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2219 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 2219 self-aligning ball bearing?", "a": "A 2219 self-aligning ball bearing has a 95 mm bore, 170 mm outer diameter and 43 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2219 bore code work?", "a": "The last two digits of 2219 are bore code 19, giving 19 × 5 = 95 mm bore. The 170 mm outside diameter and 43 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2219?", "a": "A bare 2219 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 95 mm bore?", "a": "The 22xx is the wide light section: 170×43 mm with a 37.5 mm radial section at 95 mm bore, wider than a 1219 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2219K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 170, "B_mm": 43, "seal_type": "open", "dynamic_load_kN": 84, "static_load_kN": 34.5, "fatigue_load_limit_kN": 2, "limiting_speed_rpm": 3400, "speed_oil_rpm": 4000, "weight_g": 3960, "manufacturer_designation": "2219SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2219SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2219 carries bore code 19 = 95 mm. Outside diameter 170 mm and width 43 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2219. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 95 mm bore adds load capacity through increased 43 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1219.", "Tapered-bore 2219K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 95 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 95 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2219K self-aligning ball bearing?", "a": "A 2219K self-aligning ball bearing has a 95 mm bore, 170 mm outer diameter and 43 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2219." }, { "q": "How does the 2219 bore code work?", "a": "The last two digits of 2219 are bore code 19, giving 19 × 5 = 95 mm bore. The 170 mm outside diameter and 43 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2219K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2219. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 95 mm bore?", "a": "The 22xx is the wide light section: 170×43 mm with a 37.5 mm radial section at 95 mm bore, wider than a 1219 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1319", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 200, "B_mm": 45, "seal_type": "open", "dynamic_load_kN": 129, "static_load_kN": 51, "fatigue_load_limit_kN": 1.4, "limiting_speed_rpm": 3000, "speed_oil_rpm": 3600, "weight_g": 6790, "manufacturer_designation": "1319S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1319S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1319 carries bore code 19 = 95 mm. Outside diameter 200 mm and width 45 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 95 mm bore gains rating through a larger 200 mm OD and 45 mm width; verify the housing accepts the larger envelope before substituting for a 1219.", "The open 1319 has no lubricant retention: grease escapes and contaminants migrate straight into the 95×200×45 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1319 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1319." ], "faq": [ { "q": "What are the dimensions of a 1319 self-aligning ball bearing?", "a": "A 1319 self-aligning ball bearing has a 95 mm bore, 200 mm outer diameter and 45 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1319 bore code work?", "a": "The last two digits of 1319 are bore code 19, giving 19 × 5 = 95 mm bore. The 200 mm outside diameter and 45 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1319?", "a": "A bare 1319 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 95 mm bore?", "a": "The 13xx is the medium section: 200×45 mm, 52.5 mm radial section at 95 mm bore, carrying more load than a 1219 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1319K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 200, "B_mm": 45, "seal_type": "open", "dynamic_load_kN": 129, "static_load_kN": 51, "fatigue_load_limit_kN": 1.4, "limiting_speed_rpm": 3000, "speed_oil_rpm": 3600, "weight_g": 6790, "manufacturer_designation": "1319SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1319SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1319 carries bore code 19 = 95 mm. Outside diameter 200 mm and width 45 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1319. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 95 mm bore gains rating through a larger 200 mm OD and 45 mm width; verify the housing accepts the larger envelope before substituting for a 1219.", "Tapered-bore 1319K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 95 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1319-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1319K self-aligning ball bearing?", "a": "A 1319K self-aligning ball bearing has a 95 mm bore, 200 mm outer diameter and 45 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1319." }, { "q": "How does the 1319 bore code work?", "a": "The last two digits of 1319 are bore code 19, giving 19 × 5 = 95 mm bore. The 200 mm outside diameter and 45 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1319K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1319. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 95 mm bore?", "a": "The 13xx is the medium section: 200×45 mm, 52.5 mm radial section at 95 mm bore, carrying more load than a 1219 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2319", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 200, "B_mm": 67, "seal_type": "open", "dynamic_load_kN": 161, "static_load_kN": 64.5, "fatigue_load_limit_kN": 2.7, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 8970, "manufacturer_designation": "2319S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2319S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2319 carries bore code 19 = 95 mm. Outside diameter 200 mm and width 67 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 95 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2319 has no lubricant retention: grease escapes and contaminants migrate straight into the 95×200×67 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2319 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2319-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2319 self-aligning ball bearing?", "a": "A 2319 self-aligning ball bearing has a 95 mm bore, 200 mm outer diameter and 67 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2319 bore code work?", "a": "The last two digits of 2319 are bore code 19, giving 19 × 5 = 95 mm bore. The 200 mm outside diameter and 67 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2319?", "a": "A bare 2319 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 95 mm bore?", "a": "The 23xx is the wide heavy section: 200×67 mm, 52.5 mm radial section at 95 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2319K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 95, "D_mm": 200, "B_mm": 67, "seal_type": "open", "dynamic_load_kN": 161, "static_load_kN": 64.5, "fatigue_load_limit_kN": 2.7, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 8970, "manufacturer_designation": "2319SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2319SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2319 carries bore code 19 = 95 mm. Outside diameter 200 mm and width 67 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2319. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 95 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 95 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2319K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 95 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 67 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2319K self-aligning ball bearing?", "a": "A 2319K self-aligning ball bearing has a 95 mm bore, 200 mm outer diameter and 67 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2319." }, { "q": "How does the 2319 bore code work?", "a": "The last two digits of 2319 are bore code 19, giving 19 × 5 = 95 mm bore. The 200 mm outside diameter and 67 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2319K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2319. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 95 mm bore?", "a": "The 23xx is the wide heavy section: 200×67 mm, 52.5 mm radial section at 95 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1220", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 180, "B_mm": 34, "seal_type": "open", "dynamic_load_kN": 69.5, "static_load_kN": 29.7, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 3200, "speed_oil_rpm": 3800, "weight_g": 3740, "manufacturer_designation": "1220S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1220S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1220 carries bore code 20 = 100 mm. Outside diameter 180 mm and width 34 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 100 mm bore uses a smaller 180 mm OD than a 1320; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1220 has no lubricant retention: grease escapes and contaminants migrate straight into the 100×180×34 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1220 units.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 1220." ], "faq": [ { "q": "What are the dimensions of a 1220 self-aligning ball bearing?", "a": "A 1220 self-aligning ball bearing has a 100 mm bore, 180 mm outer diameter and 34 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1220 bore code work?", "a": "The last two digits of 1220 are bore code 20, giving 20 × 5 = 100 mm bore. The 180 mm outside diameter and 34 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1220?", "a": "A bare 1220 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 100 mm bore?", "a": "The 12xx is the light section: 180×34 mm with a 40.0 mm radial section at 100 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1220K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 180, "B_mm": 34, "seal_type": "open", "dynamic_load_kN": 69.5, "static_load_kN": 29.7, "fatigue_load_limit_kN": 1.2, "limiting_speed_rpm": 3200, "speed_oil_rpm": 3800, "weight_g": 3740, "manufacturer_designation": "1220SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1220SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1220 carries bore code 20 = 100 mm. Outside diameter 180 mm and width 34 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1220. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 100 mm bore uses a smaller 180 mm OD than a 1320; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1220K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 100 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1220-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1220K self-aligning ball bearing?", "a": "A 1220K self-aligning ball bearing has a 100 mm bore, 180 mm outer diameter and 34 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1220." }, { "q": "How does the 1220 bore code work?", "a": "The last two digits of 1220 are bore code 20, giving 20 × 5 = 100 mm bore. The 180 mm outside diameter and 34 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1220K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1220. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 100 mm bore?", "a": "The 12xx is the light section: 180×34 mm with a 40.0 mm radial section at 100 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2220", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 180, "B_mm": 46, "seal_type": "open", "dynamic_load_kN": 94.5, "static_load_kN": 38.5, "fatigue_load_limit_kN": 2.3, "limiting_speed_rpm": 3200, "speed_oil_rpm": 3800, "weight_g": 4710, "manufacturer_designation": "2220S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2220S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2220 carries bore code 20 = 100 mm. Outside diameter 180 mm and width 46 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 100 mm bore adds load capacity through increased 46 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1220.", "The open 2220 has no lubricant retention: grease escapes and contaminants migrate straight into the 100×180×46 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2220 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 2220-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 2220 self-aligning ball bearing?", "a": "A 2220 self-aligning ball bearing has a 100 mm bore, 180 mm outer diameter and 46 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2220 bore code work?", "a": "The last two digits of 2220 are bore code 20, giving 20 × 5 = 100 mm bore. The 180 mm outside diameter and 46 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2220?", "a": "A bare 2220 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 100 mm bore?", "a": "The 22xx is the wide light section: 180×46 mm with a 40.0 mm radial section at 100 mm bore, wider than a 1220 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2220K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 180, "B_mm": 46, "seal_type": "open", "dynamic_load_kN": 94.5, "static_load_kN": 38.5, "fatigue_load_limit_kN": 2.3, "limiting_speed_rpm": 3200, "speed_oil_rpm": 3800, "weight_g": 4710, "manufacturer_designation": "2220SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2220SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2220 carries bore code 20 = 100 mm. Outside diameter 180 mm and width 46 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2220. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 100 mm bore adds load capacity through increased 46 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1220.", "Tapered-bore 2220K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 100 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 46 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2220K self-aligning ball bearing?", "a": "A 2220K self-aligning ball bearing has a 100 mm bore, 180 mm outer diameter and 46 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2220." }, { "q": "How does the 2220 bore code work?", "a": "The last two digits of 2220 are bore code 20, giving 20 × 5 = 100 mm bore. The 180 mm outside diameter and 46 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2220K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2220. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 100 mm bore?", "a": "The 22xx is the wide light section: 180×46 mm with a 40.0 mm radial section at 100 mm bore, wider than a 1220 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1320", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 215, "B_mm": 47, "seal_type": "open", "dynamic_load_kN": 140, "static_load_kN": 57.5, "fatigue_load_limit_kN": 1.6, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 8400, "manufacturer_designation": "1320S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1320S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1320 carries bore code 20 = 100 mm. Outside diameter 215 mm and width 47 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 100 mm bore gains rating through a larger 215 mm OD and 47 mm width; verify the housing accepts the larger envelope before substituting for a 1220.", "The open 1320 has no lubricant retention: grease escapes and contaminants migrate straight into the 100×215×47 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1320 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1320 self-aligning ball bearing?", "a": "A 1320 self-aligning ball bearing has a 100 mm bore, 215 mm outer diameter and 47 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1320 bore code work?", "a": "The last two digits of 1320 are bore code 20, giving 20 × 5 = 100 mm bore. The 215 mm outside diameter and 47 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1320?", "a": "A bare 1320 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 100 mm bore?", "a": "The 13xx is the medium section: 215×47 mm, 57.5 mm radial section at 100 mm bore, carrying more load than a 1220 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1320K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 215, "B_mm": 47, "seal_type": "open", "dynamic_load_kN": 140, "static_load_kN": 57.5, "fatigue_load_limit_kN": 1.6, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 8400, "manufacturer_designation": "1320SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1320SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1320 carries bore code 20 = 100 mm. Outside diameter 215 mm and width 47 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1320. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 100 mm bore gains rating through a larger 215 mm OD and 47 mm width; verify the housing accepts the larger envelope before substituting for a 1220.", "Tapered-bore 1320K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 100 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "A 100 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1320K self-aligning ball bearing?", "a": "A 1320K self-aligning ball bearing has a 100 mm bore, 215 mm outer diameter and 47 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1320." }, { "q": "How does the 1320 bore code work?", "a": "The last two digits of 1320 are bore code 20, giving 20 × 5 = 100 mm bore. The 215 mm outside diameter and 47 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1320K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1320. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 100 mm bore?", "a": "The 13xx is the medium section: 215×47 mm, 57.5 mm radial section at 100 mm bore, carrying more load than a 1220 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2320", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 215, "B_mm": 73, "seal_type": "open", "dynamic_load_kN": 187, "static_load_kN": 79, "fatigue_load_limit_kN": 3.3, "limiting_speed_rpm": 2400, "speed_oil_rpm": 3200, "weight_g": 11500, "manufacturer_designation": "2320S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2320S" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2320 carries bore code 20 = 100 mm. Outside diameter 215 mm and width 73 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 100 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "The open 2320 has no lubricant retention: grease escapes and contaminants migrate straight into the 100×215×73 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2320 units.", "A 100 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2320 self-aligning ball bearing?", "a": "A 2320 self-aligning ball bearing has a 100 mm bore, 215 mm outer diameter and 73 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2320 bore code work?", "a": "The last two digits of 2320 are bore code 20, giving 20 × 5 = 100 mm bore. The 215 mm outside diameter and 73 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2320?", "a": "A bare 2320 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2300 compare with other self-aligning series at the same 100 mm bore?", "a": "The 23xx is the wide heavy section: 215×73 mm, 57.5 mm radial section at 100 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2320K", "brand": "NTN", "series": "2300-series", "type": "self_aligning_ball", "d_mm": 100, "D_mm": 215, "B_mm": 73, "seal_type": "open", "dynamic_load_kN": 187, "static_load_kN": 79, "fatigue_load_limit_kN": 3.3, "limiting_speed_rpm": 2400, "speed_oil_rpm": 3200, "weight_g": 11500, "manufacturer_designation": "2320SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2320SK" ], "naming_rule_text": "In the 2300-series (ISO 15 dimension series) the leading digits 23 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2320 carries bore code 20 = 100 mm. Outside diameter 215 mm and width 73 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2320. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 100 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 23xx heavy wide-section at 100 mm bore is built for high-load, lower-speed duty; specifying it in a high-rpm application gives excess heat and short grease life — use 12/13 there.", "Tapered-bore 2320K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 100 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 2320K." ], "faq": [ { "q": "What are the dimensions of a 2320K self-aligning ball bearing?", "a": "A 2320K self-aligning ball bearing has a 100 mm bore, 215 mm outer diameter and 73 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2320." }, { "q": "How does the 2320 bore code work?", "a": "The last two digits of 2320 are bore code 20, giving 20 × 5 = 100 mm bore. The 215 mm outside diameter and 73 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2320K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2320. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2300 compare with other self-aligning series at the same 100 mm bore?", "a": "The 23xx is the wide heavy section: 215×73 mm, 57.5 mm radial section at 100 mm bore — the highest-capacity double-row self-aligning option here, aimed at lower-speed, high-load shafts." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1221", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 105, "D_mm": 190, "B_mm": 36, "seal_type": "open", "dynamic_load_kN": 75, "static_load_kN": 32.5, "fatigue_load_limit_kN": 1.3, "limiting_speed_rpm": 3000, "speed_oil_rpm": 3600, "weight_g": 4430, "manufacturer_designation": "1221S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1221S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1221 carries bore code 21 = 105 mm. Outside diameter 190 mm and width 36 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 105 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 105 mm bore uses a smaller 190 mm OD than a 1321; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1221 has no lubricant retention: grease escapes and contaminants migrate straight into the 105×190×36 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1221 units.", "Do not use a self-aligning ball bearing where high radial rigidity is required — the sphered outer raceway allows more radial movement than a deep-groove or cylindrical roller bearing." ], "faq": [ { "q": "What are the dimensions of a 1221 self-aligning ball bearing?", "a": "A 1221 self-aligning ball bearing has a 105 mm bore, 190 mm outer diameter and 36 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1221 bore code work?", "a": "The last two digits of 1221 are bore code 21, giving 21 × 5 = 105 mm bore. The 190 mm outside diameter and 36 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1221?", "a": "A bare 1221 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 105 mm bore?", "a": "The 12xx is the light section: 190×36 mm with a 42.5 mm radial section at 105 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2221", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 105, "D_mm": 190, "B_mm": 50, "seal_type": "open", "dynamic_load_kN": 109, "static_load_kN": 45, "fatigue_load_limit_kN": 2.6, "limiting_speed_rpm": 3000, "speed_oil_rpm": 3600, "weight_g": 5730, "manufacturer_designation": "2221S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2221S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2221 carries bore code 21 = 105 mm. Outside diameter 190 mm and width 50 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 105 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 105 mm bore adds load capacity through increased 50 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1221.", "The open 2221 has no lubricant retention: grease escapes and contaminants migrate straight into the 105×190×50 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2221 units.", "A 105 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 2221 self-aligning ball bearing?", "a": "A 2221 self-aligning ball bearing has a 105 mm bore, 190 mm outer diameter and 50 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2221 bore code work?", "a": "The last two digits of 2221 are bore code 21, giving 21 × 5 = 105 mm bore. The 190 mm outside diameter and 50 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2221?", "a": "A bare 2221 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 105 mm bore?", "a": "The 22xx is the wide light section: 190×50 mm with a 42.5 mm radial section at 105 mm bore, wider than a 1221 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1321", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 105, "D_mm": 225, "B_mm": 49, "seal_type": "open", "dynamic_load_kN": 154, "static_load_kN": 64.5, "fatigue_load_limit_kN": 1.8, "limiting_speed_rpm": 2600, "speed_oil_rpm": 3200, "weight_g": 9580, "manufacturer_designation": "1321S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1321S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1321 carries bore code 21 = 105 mm. Outside diameter 225 mm and width 49 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 105 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 105 mm bore gains rating through a larger 225 mm OD and 49 mm width; verify the housing accepts the larger envelope before substituting for a 1221.", "The open 1321 has no lubricant retention: grease escapes and contaminants migrate straight into the 105×225×49 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1321 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1321-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1321 self-aligning ball bearing?", "a": "A 1321 self-aligning ball bearing has a 105 mm bore, 225 mm outer diameter and 49 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1321 bore code work?", "a": "The last two digits of 1321 are bore code 21, giving 21 × 5 = 105 mm bore. The 225 mm outside diameter and 49 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1321?", "a": "A bare 1321 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 105 mm bore?", "a": "The 13xx is the medium section: 225×49 mm, 60.0 mm radial section at 105 mm bore, carrying more load than a 1221 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1222", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 110, "D_mm": 200, "B_mm": 38, "seal_type": "open", "dynamic_load_kN": 87, "static_load_kN": 38.5, "fatigue_load_limit_kN": 1.5, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 5210, "manufacturer_designation": "1222S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1222S" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1222 carries bore code 22 = 110 mm. Outside diameter 200 mm and width 38 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "raceway smearing under marginal lubrication at start-up", "fretting corrosion on a loose shaft seat" ], "pitfalls": [ "Mount this 110 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 110 mm bore uses a smaller 200 mm OD than a 1322; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "The open 1222 has no lubricant retention: grease escapes and contaminants migrate straight into the 110×200×38 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1222 units.", "Suffixes stack in a defined order — clearance follows the bore code, e.g. 1222-C3. No clearance suffix means normal CN clearance." ], "faq": [ { "q": "What are the dimensions of a 1222 self-aligning ball bearing?", "a": "A 1222 self-aligning ball bearing has a 110 mm bore, 200 mm outer diameter and 38 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1222 bore code work?", "a": "The last two digits of 1222 are bore code 22, giving 22 × 5 = 110 mm bore. The 200 mm outside diameter and 38 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1222?", "a": "A bare 1222 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1200 compare with other self-aligning series at the same 110 mm bore?", "a": "The 12xx is the light section: 200×38 mm with a 45.0 mm radial section at 110 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1222K", "brand": "NTN", "series": "1200-series", "type": "self_aligning_ball", "d_mm": 110, "D_mm": 200, "B_mm": 38, "seal_type": "open", "dynamic_load_kN": 87, "static_load_kN": 38.5, "fatigue_load_limit_kN": 1.5, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 5210, "manufacturer_designation": "1222SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1222SK" ], "naming_rule_text": "In the 1200-series (ISO 15 dimension series) the leading digits 12 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1222 carries bore code 22 = 110 mm. Outside diameter 200 mm and width 38 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1222. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "pulp, paper and steel mill machinery", "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "cage wear or fracture from sustained vibration or shock loading", "false brinelling from vibration while the shaft is stationary" ], "pitfalls": [ "Mount this 110 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 12xx light section at 110 mm bore uses a smaller 200 mm OD than a 1322; load ratings are lower, so do not replace a failed 13-series bearing with a 12-series without re-rating the load.", "Tapered-bore 1222K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 110 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Shaft and housing fillets must clear the bearing chamfer so the 38 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 1222K self-aligning ball bearing?", "a": "A 1222K self-aligning ball bearing has a 110 mm bore, 200 mm outer diameter and 38 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1222." }, { "q": "How does the 1222 bore code work?", "a": "The last two digits of 1222 are bore code 22, giving 22 × 5 = 110 mm bore. The 200 mm outside diameter and 38 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1222K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1222. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1200 compare with other self-aligning series at the same 110 mm bore?", "a": "The 12xx is the light section: 200×38 mm with a 45.0 mm radial section at 110 mm bore — below 13/22/23 in load capacity, for light loads in compact spaces." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2222", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 110, "D_mm": 200, "B_mm": 53, "seal_type": "open", "dynamic_load_kN": 122, "static_load_kN": 51.5, "fatigue_load_limit_kN": 2.9, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 6750, "manufacturer_designation": "2222S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2222S" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2222 carries bore code 22 = 110 mm. Outside diameter 200 mm and width 53 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "rolling-contact fatigue spalling after the rated L10 life is exceeded", "cage wear or fracture from sustained vibration or shock loading" ], "pitfalls": [ "Mount this 110 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 110 mm bore adds load capacity through increased 53 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1222.", "The open 2222 has no lubricant retention: grease escapes and contaminants migrate straight into the 110×200×53 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 2200-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 2222 units.", "Shaft and housing fillets must clear the bearing chamfer so the 53 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius." ], "faq": [ { "q": "What are the dimensions of a 2222 self-aligning ball bearing?", "a": "A 2222 self-aligning ball bearing has a 110 mm bore, 200 mm outer diameter and 53 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 2222 bore code work?", "a": "The last two digits of 2222 are bore code 22, giving 22 × 5 = 110 mm bore. The 200 mm outside diameter and 53 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 2222?", "a": "A bare 2222 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 2200 compare with other self-aligning series at the same 110 mm bore?", "a": "The 22xx is the wide light section: 200×53 mm with a 45.0 mm radial section at 110 mm bore, wider than a 1222 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "2222K", "brand": "NTN", "series": "2200-series", "type": "self_aligning_ball", "d_mm": 110, "D_mm": 200, "B_mm": 53, "seal_type": "open", "dynamic_load_kN": 122, "static_load_kN": 51.5, "fatigue_load_limit_kN": 2.9, "limiting_speed_rpm": 2800, "speed_oil_rpm": 3400, "weight_g": 6750, "manufacturer_designation": "2222SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "2222SK" ], "naming_rule_text": "In the 2200-series (ISO 15 dimension series) the leading digits 22 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 2222 carries bore code 22 = 110 mm. Outside diameter 200 mm and width 53 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 2222. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "hoist, winch and crane drums", "heavy conveyor drive shafts", "pulp, paper and steel mill machinery", "heavy industrial drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "edge loading and stress concentration from excessive misalignment beyond the allowable angle", "raceway smearing under marginal lubrication at start-up" ], "pitfalls": [ "Mount this 110 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 22xx wide-section at 110 mm bore adds load capacity through increased 53 mm width; the wider ring needs a wider housing seat and may reduce limiting speed versus a 1222.", "Tapered-bore 2222K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 110 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "Self-aligning ball bearings have lower axial load capacity than same-size angular-contact or tapered-roller bearings; verify the axial component is within the Y-factor limits for 2222K." ], "faq": [ { "q": "What are the dimensions of a 2222K self-aligning ball bearing?", "a": "A 2222K self-aligning ball bearing has a 110 mm bore, 200 mm outer diameter and 53 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 2222." }, { "q": "How does the 2222 bore code work?", "a": "The last two digits of 2222 are bore code 22, giving 22 × 5 = 110 mm bore. The 200 mm outside diameter and 53 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 2222K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 2222. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 2200 compare with other self-aligning series at the same 110 mm bore?", "a": "The 22xx is the wide light section: 200×53 mm with a 45.0 mm radial section at 110 mm bore, wider than a 1222 for higher load capacity at the cost of speed." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1322", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 110, "D_mm": 240, "B_mm": 50, "seal_type": "open", "dynamic_load_kN": 161, "static_load_kN": 72.5, "fatigue_load_limit_kN": 2.1, "limiting_speed_rpm": 2400, "speed_oil_rpm": 3000, "weight_g": 11500, "manufacturer_designation": "1322S", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1322S" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1322 carries bore code 22 = 110 mm. Outside diameter 240 mm and width 50 mm follow the ISO 15 general plan. The cylindrical bore fits directly on a machined shaft seat; a tapered-bore K variant is available for adapter-sleeve mounting. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "heavy industrial drive shafts", "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "fretting corrosion on a loose shaft seat", "rolling-contact fatigue spalling after the rated L10 life is exceeded" ], "pitfalls": [ "Mount this 110 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 110 mm bore gains rating through a larger 240 mm OD and 50 mm width; verify the housing accepts the larger envelope before substituting for a 1222.", "The open 1322 has no lubricant retention: grease escapes and contaminants migrate straight into the 110×240×50 mm raceway, so specify a sealed arrangement for dusty or washdown duty.", "Open bearings tolerate the highest speeds in the 1300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 1322 units.", "A 110 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft." ], "faq": [ { "q": "What are the dimensions of a 1322 self-aligning ball bearing?", "a": "A 1322 self-aligning ball bearing has a 110 mm bore, 240 mm outer diameter and 50 mm width, per ISO 15 boundary dimensions. This is the cylindrical-bore version; a tapered-bore K variant is available for adapter-sleeve mounting." }, { "q": "How does the 1322 bore code work?", "a": "The last two digits of 1322 are bore code 22, giving 22 × 5 = 110 mm bore. The 240 mm outside diameter and 50 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the open suffix mean on 1322?", "a": "A bare 1322 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication." }, { "q": "How does the 1300 compare with other self-aligning series at the same 110 mm bore?", "a": "The 13xx is the medium section: 240×50 mm, 65.0 mm radial section at 110 mm bore, carrying more load than a 1222 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" }, { "sku": "1322K", "brand": "NTN", "series": "1300-series", "type": "self_aligning_ball", "d_mm": 110, "D_mm": 240, "B_mm": 50, "seal_type": "open", "dynamic_load_kN": 161, "static_load_kN": 72.5, "fatigue_load_limit_kN": 2.1, "limiting_speed_rpm": 2400, "speed_oil_rpm": 3000, "weight_g": 11500, "manufacturer_designation": "1322SK", "standard": "ISO 15", "source_ref": "https://www.ntnglobal.com/", "catalog_ver": "CAT. No. 2203-3/E 2024", "extracted_at": "2026-09-25", "aliases": [ "1322SK" ], "naming_rule_text": "In the 1300-series (ISO 15 dimension series) the leading digits 13 mark a double-row self-aligning ball bearing and the last two digits encode the bore: 1322 carries bore code 22 = 110 mm. Outside diameter 240 mm and width 50 mm follow the ISO 15 general plan. The K suffix denotes a 1:12 tapered bore for mounting on an adapter sleeve or tapered shaft seat; the cylindrical-bore equivalent is 1322. Two rows of balls run on a common sphered outer raceway, allowing the inner ring to pivot and compensate for shaft deflection or housing misalignment.", "applications": [ "large gearbox and reducer shafts", "industrial fan and blower rotors", "hoist, winch and crane drums", "heavy conveyor drive shafts" ], "failure_modes": [ "contamination wear from dust and dirt ingress through the open arrangement", "lubricant starvation when no regreasing interval is maintained", "false brinelling from vibration while the shaft is stationary", "edge loading and stress concentration from excessive misalignment beyond the allowable angle" ], "pitfalls": [ "Mount this 110 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.", "The 13xx medium section at 110 mm bore gains rating through a larger 240 mm OD and 50 mm width; verify the housing accepts the larger envelope before substituting for a 1222.", "Tapered-bore 1322K requires a matching adapter sleeve (e.g. H2xx for small bores, H3xx for larger); verify the sleeve bore code matches the 110 mm shaft before ordering.", "The adapter sleeve adds length and a small radial step; check that the housing bore and shaft shoulder clear the sleeve nut and that the withdrawal nut is accessible for future dismounting.", "The self-aligning feature compensates for static misalignment and shaft deflection, not for poor initial alignment — always align shaft and housing as accurately as possible before fitting 1322K." ], "faq": [ { "q": "What are the dimensions of a 1322K self-aligning ball bearing?", "a": "A 1322K self-aligning ball bearing has a 110 mm bore, 240 mm outer diameter and 50 mm width, per ISO 15 boundary dimensions. The K suffix indicates a 1:12 tapered bore for adapter-sleeve mounting; the cylindrical-bore version is 1322." }, { "q": "How does the 1322 bore code work?", "a": "The last two digits of 1322 are bore code 22, giving 22 × 5 = 110 mm bore. The 240 mm outside diameter and 50 mm width follow the ISO 15 diameter series, not the bore code alone." }, { "q": "What does the K suffix mean on 1322K?", "a": "The K suffix denotes a 1:12 tapered bore for mounting with an adapter sleeve. The cylindrical-bore equivalent is 1322. Adapter sleeves are sold separately and must match the bore code." }, { "q": "How does the 1300 compare with other self-aligning series at the same 110 mm bore?", "a": "The 13xx is the medium section: 240×50 mm, 65.0 mm radial section at 110 mm bore, carrying more load than a 1222 but needing a larger housing bore." } ], "confidence_score": 0.7, "status": "published", "last_verified": "2026-09-25" } ]