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Deep groove ball bearing rings
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Deep groove ball bearing rings
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Deep groove ball 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 |
| Single-row Deep Groove Type | Single-row Deep Groove Ball Bearing Inner Ring | - Bearing steel (GCr15SiMn, general purpose) - Stainless steel (440C, corrosion-resistant) - High-temperature bearing steel (GCr15SiMo, high-temperature) | GB/T 276 Examples: 6005 inner ring, 6210 inner ring, 6315 inner ring | Bore diameter (d): 25 (G5), 50 (k5), 75 (m5) Outer ring fitting diameter (d2): 35 (r6), 65 (r6), 95 (r6) Width (B): 13, 20, 25 Bore roundness: ≤0.002mm (Class P4), ≤0.004mm (Class P5), ≤0.008mm (Class P0) Cylindricity (bore): ≤0.003mm (Class P4), ≤0.006mm (Class P5) | Hardness: HRC60-64 (GCr15SiMn), HRC58-62 (440C) Contact fatigue life: ≥1800h (rated load, GCr15SiMn) Surface roughness: Ra≤0.1μm (raceway surface), Ra≤0.2μm (end face) Temperature resistance: ≤150℃ (GCr15SiMn), ≤300℃ (440C), ≤250℃ (GCr15SiMo) | General industry (motors, reducers, water pumps), automobiles (generators, air conditioning compressors), suitable for light-medium load, high-speed scenarios | Interference fit with shaft (H7/k5, light load), H7/m5 (medium load); Raceway requires precision grinding to avoid pitting and scratches; GCr15SiMn requires integral quenching + low-temperature tempering (150-180℃) |
| Single-row Deep Groove Type | Single-row Deep Groove Ball Bearing Outer Ring | - Bearing steel (GCr15SiMn, general purpose) - Stainless steel (440C, corrosion-resistant) - Ceramic composite (Al₂O₃, lightweight) | GB/T 276 Examples: 6005 outer ring, 6210 outer ring, 6315 outer ring | Outer diameter (D): 47 (h6), 90 (h6), 130 (h6) Inner raceway diameter (D1): 39 (H7), 78 (H7), 110 (H7) Width (B): 13, 20, 25 Outer diameter roundness: ≤0.003mm (Class P4), ≤0.005mm (Class P5), ≤0.01mm (Class P0) End face parallelism: ≤0.004mm (Class P4), ≤0.008mm (Class P5) | Hardness: HRC60-64 (GCr15SiMn), HRC58-62 (440C) Radial rated dynamic load: ≥12.8kN (6005), ≥32.8kN (6210), ≥62.5kN (6315) Radial internal clearance: 0.005-0.018mm (Group C3), 0.01-0.025mm (Group C4) Impact resistance: Can withstand 1.2 times rated static load (instantaneous impact) | Cooperates with inner ring to achieve radial load bearing, suitable for dusty/humid working conditions (such as textile machinery, agricultural machinery), automobile auxiliary systems | 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 motors); Outer ring can have seal grooves (3-5mm wide) for double-sided rubber seals (2RS) |
| Double-row Deep Groove Type | Double-row Deep Groove Ball Bearing Inner Ring | - Bearing steel (GCr15, medium-heavy load) - Carburized steel (20CrNiMoA, high impact) - Stainless steel (316L, mild corrosion) | GB/T 276 (double-row type) Examples: 4205 inner ring, 4210 inner ring | Bore diameter (d): 25 (k5), 50 (m5) Double raceway spacing (s): 8 (4205), 15 (4210) Width (B): 18, 27 Bore cylindricity: ≤0.003mm (Class P4), ≤0.006mm (Class P5) Raceway symmetry: ≤0.005mm (Class P4) | Hardness: HRC60-64 (GCr15), HRC58-62 (20CrNiMoA carburized) Radial rated dynamic load: ≥18kN (4205), ≥45kN (4210) Temperature resistance: ≤150℃ (GCr15), ≤200℃ (20CrNiMoA) Wear loss: ≤0.003mm/100h (oil lubrication, GCr15) | Medium-heavy radial load scenarios, such as machine tool feed shafts, heavy transporter rollers, automobile drive axle auxiliary bearings | Interference fit with shaft (H7/u6, heavy load); Carburized layer depth 1.0-1.5mm (20CrNiMoA); Must ensure double raceway coaxiality ≤0.004mm to avoid uneven loading |
| Double-row Deep Groove Type | Double-row Deep Groove Ball Bearing Outer Ring | - Bearing steel (GCr15, medium-heavy load) - High-temperature bearing steel (GCr15SiMo, high-temperature heavy load) - Stainless steel (440C, corrosion-resistant heavy load) | GB/T 276 (double-row type) Examples: 4205 outer ring, 4210 outer ring | Outer diameter (D): 52 (h6), 95 (h6) Double inner raceway diameters (D1/D2): 35/40 (4205), 68/75 (4210) Width (B): 18, 27 Outer diameter roundness: ≤0.003mm (Class P4), ≤0.006mm (Class P5) Mounting flange diameter (if flanged): 60 (4205), 105 (4210) | Hardness: HRC60-64 (GCr15), HRC58-62 (GCr15SiMo) Radial rated static load: ≥10kN (4205), ≥30kN (4210) Temperature resistance: ≤250℃ (GCr15SiMo), ≤300℃ (440C) Deformation resistance: Elastic deformation ≤0.0015mm/kN at room temperature | Withstands heavy radial loads + slight bidirectional axial loads, such as hydraulic motors, mining machinery auxiliary shafts, ship deck machinery | Transition fit with bearing housing (H7/h6, medium load), H7/r6 (heavy load); High-temperature working conditions require high-temperature grease (such as molybdenum disulfide base); Flanged outer rings have higher positioning accuracy (flatness ≤0.01mm) |
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