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Tapered Roller Bearing Rings
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Tapered Roller Bearing Rings
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Tapered Roller Bearing Rings
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| Part Category | Part Name | Recommended Materials | Specifications (National Standard / Examples) | Core Dimensional Parameters (Examples, Unit: mm) | Key Performance Parameters | Applicable Scenarios | Remarks |
| Tapered Roller Type | Tapered Roller Bearing Inner Ring (Single-row) | - Bearing steel (GCr15SiMn, general purpose) - Carburized steel (20CrNiMoA, high impact resistance) - Stainless steel (440C, corrosion-resistant) | GB/T 297 Examples: 30305 inner ring, 32210 inner ring, 33215 inner ring | Bore diameter (d): 25 (k5), 50 (m5), 75 (s5) Inner ring flange diameter (d₁): 35 (G5), 62 (k5), 95 (m5) Width (B): 15, 25, 30 Bore cylindricity: ≤0.003mm (Class P4), ≤0.006mm (Class P5), ≤0.012mm (Class P0) Raceway contact angle (α): 11° (30305), 15° (32210), 25° (33215) | Hardness: HRC60-64 (GCr15SiMn), HRC58-62 (20CrNiMoA carburized) Contact fatigue life: ≥2000h (rated load, GCr15SiMn) Surface roughness: Ra≤0.1μm (raceway surface), Ra≤0.2μm (end face) Temperature resistance: ≤150℃ (GCr15SiMn), ≤200℃ (20CrNiMoA) | Automobile wheel hubs (radial support + axial positioning), industrial gearboxes (low-speed heavy load), reducers (bidirectional axial load) | Interference fit with shaft (H7/k5, light load), H7/m5 (medium load); Carburized layer depth 1.0-1.5mm (20CrNiMoA) to enhance impact resistance; Must be installed in pairs with outer ring (contact angle deviation ≤0.5°) |
| Tapered Roller Type | Tapered Roller Bearing Outer Ring (Single-row) | - Bearing steel (GCr15SiMn, general purpose) - High-temperature bearing steel (GCr15SiMo, high-temperature) - Ceramic composite (Si₃N₄, lightweight) | GB/T 297 Examples: 30305 outer ring, 32210 outer ring, 33215 outer ring | Outer diameter (D): 62 (h6), 90 (h6), 130 (h6) Inner raceway diameter (D₁): 47 (H7), 72 (H7), 108 (H7) Width (B): 15, 25, 30 Outer diameter roundness: ≤0.004mm (Class P4), ≤0.008mm (Class P5), ≤0.015mm (Class P0) Shoulder height (h): 3 (30305), 5 (32210) | Hardness: HRC60-64 (GCr15SiMn), HRC58-62 (GCr15SiMo) Radial rated dynamic load: ≥35kN (30305), ≥85kN (32210), ≥150kN (33215) Axial rated static load: ≥28kN (30305), ≥65kN (32210), ≥120kN (33215) Impact resistance: Can withstand 1.5 times rated static load (instantaneous radial impact) | Cooperates with inner ring to achieve radial + axial load bearing, suitable for dusty/vibrating working conditions (such as mining machinery, agricultural machinery), automobile gearboxes | Transition fit with bearing housing (H7/h6, general), H7/js6 (precision scenarios); Ceramic outer rings are 40% lighter than steel rings, suitable for high-speed noise reduction (such as precision spindles); Shoulder must cooperate with inner ring flange to prevent axial movement |
| Tapered Roller Type (Double-row) | Double-row Tapered Roller Bearing Inner Ring | - Bearing steel (GCr15, medium-heavy load) - Carburized steel (20CrNiMoA, high impact) - Stainless steel (316L, mild corrosion) | GB/T 297 (double-row type) Examples: 352210 inner ring, 353015 inner ring | Bore diameter (d): 50 (k5), 75 (m5) Double raceway spacing (s): 18 (352210), 25 (353015) Width (B): 30, 40 Bore cylindricity: ≤0.004mm (Class P4), ≤0.008mm (Class P5) Raceway symmetry: ≤0.005mm (Class P4) | Hardness: HRC60-64 (GCr15), HRC58-62 (20CrNiMoA carburized) Radial rated dynamic load: ≥120kN (352210), ≥210kN (353015) Temperature resistance: ≤150℃ (GCr15), ≤200℃ (20CrNiMoA) Wear loss: ≤0.002mm/100h (oil lubrication, GCr15) | Metallurgical rolling mills (high impact load), crane drum shafts (bidirectional axial positioning), ship propulsion systems (low-speed heavy load) | Interference fit with shaft (H7/u6, heavy load); Double raceways must be coaxial (deviation ≤0.003mm); Carburized layer depth 1.2-1.8mm (20CrNiMoA) to enhance raceway wear resistance |
| Tapered Roller Type (Double-row) | Double-row Tapered Roller Bearing Outer Ring | - Bearing steel (GCr15, medium-heavy load) - High-temperature bearing steel (GCr15SiMo, high-temperature heavy load) - Wear-resistant alloy steel (Mn13, abrasive-resistant) | GB/T 297 (double-row type) Examples: 352210 outer ring, 353015 outer ring | Outer diameter (D): 90 (h6), 130 (h6) Double inner raceway diameters (D₁/D₂): 68/72 (352210), 105/110 (353015) Width (B): 30, 40 Outer diameter roundness: ≤0.005mm (Class P4), ≤0.01mm (Class P5) Mounting flange diameter (if flanged): 100 (352210), 145 (353015) | Hardness: HRC60-64 (GCr15), HRC58-62 (GCr15SiMo) Radial rated static load: ≥95kN (352210), ≥160kN (353015) Temperature resistance: ≤250℃ (GCr15SiMo), ≤180℃ (Mn13) Deformation resistance: Radial elastic deformation ≤0.0015mm/kN at room temperature | Cooperates with inner ring to achieve ultra-radial load bearing, suitable for abrasive-rich working conditions (such as mining machinery, construction machinery), wind turbine yaw systems (low-speed high torque) | Interference fit with bearing housing (H7/r6, heavy load); Mn13 outer rings suitable for abrasive-rich scenarios, avoid low-temperature impact; Flanged outer rings have higher positioning accuracy (flatness ≤0.01mm) |
| Tapered Roller Type (Sealed) | Sealed Tapered Roller Bearing Outer Ring | - Bearing steel (GCr15SiMn, general purpose) - Stainless steel (440C, corrosion-resistant) - Ceramic composite (Al₂O₃, lightweight) | GB/T 297 (sealed type) Examples: 32005 outer ring (2RS), 32210 outer ring (2RZ) | Outer diameter (D): 47 (h6), 90 (h6) Seal type: Double-lip rubber seal (2RS), Metal dust cover (2RZ) Seal groove width (w): 3 (32005), 5 (32210) Inner raceway diameter (D₁): 37 (H7), 72 (H7) Contact angle (α): 15° (32005), 20° (32210) | Hardness: HRC60-64 (GCr15SiMn), HRC58-62 (440C) Seal life: ≥5000h (dust environment), ≥8000h (humid environment) Temperature resistance: ≤120℃ (2RS rubber), ≤200℃ (2RZ metal) Protection class: IP65 (2RS), IP54 (2RZ) | Textile machinery winding shafts (dusty), food processing equipment (humid), automobile wheel hubs (mud/water protection) | Interference fit between seal and inner ring (interference 0.05-0.1mm); Ceramic outer rings can reduce noise (such as precision spindles); Regular grease replenishment required (every 200h) |
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