Ningbo Kent Bearing Co., Ltd
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Tapered roller bearings (TRBs) from the 302 series (metric design) are widely used in automotive drivetrain systems due to their ability to handle combined radial and axial loads. These bearings feature a conical geometry with optimized contact angles (12°-14°) for balanced load distribution, making them ideal for:
Transmissions (input/output shafts)
Differentials (pinion gear support)
Wheel hubs (paired configurations)
Steering systems
| Bearing No. | Inner Diameter (d) | Outer Diameter (D) | Width (T) | Dynamic Load (Cr) | Static Load (Cor) | Limiting Speed (Grease) |
|---|---|---|---|---|---|---|
| 30201 | 12 mm | 32 mm | 11 mm | 15.8 kN | 13.5 kN | 8,000 rpm |
| 30202 | 15 mm | 35 mm | 11 mm | 17.5 kN | 15.0 kN | 7,500 rpm |
| 30203 | 17 mm | 40 mm | 12 mm | 22.0 kN | 19.5 kN | 7,000 rpm |
| 30204 | 20 mm | 47 mm | 15 mm | 30.5 kN | 27.0 kN | 6,300 rpm |
| 30205 | 25 mm | 52 mm | 15 mm | 34.0 kN | 30.0 kN | 6,000 rpm |
| 30206 | 30 mm | 62 mm | 16 mm | 42.0 kN | 37.5 kN | 5,300 rpm |
| 30207 | 35 mm | 72 mm | 17 mm | 48.5 kN | 43.0 kN | 4,800 rpm |
| 30208 | 40 mm | 80 mm | 18 mm | 55.0 kN | 50.0 kN | 4,500 rpm |
| 30209 | 45 mm | 85 mm | 19 mm | 60.0 kN | 55.0 kN | 4,200 rpm |
| 30210 | 50 mm | 90 mm | 20 mm | 65.0 kN | 60.0 kN | 4,000 rpm |
| 30211 | 55 mm | 100 mm | 21 mm | 72.0 kN | 66.0 kN | 3,800 rpm |
| 30212 | 60 mm | 110 mm | 22 mm | 78.0 kN | 72.0 kN | 3,500 rpm |
Note: Load ratings based on ISO 281/76 standards. Limiting speeds are for grease lubrication (oil lubrication increases by ~20%).
| Component | Bearing Pairing | Load Type | Recommended Model |
|---|---|---|---|
| Transmission Shaft | Back-to-back (DB) | Radial + moderate axial | 30205 + 30205 |
| Differential Pinion | Face-to-face (DF) | High axial thrust | 30206-C3 |
| Wheel Hub | Double-row (pre-adjusted) | Shock loads | 30210-2RS |