30304JR Wheel Bearing
The DUHUI Bearing 30304JR wheel bearing is a metric-series single-row tapered roller bearing with a 20 mm bore, 52 mm outer diameter, and 16.25 mm total width. Designed to accommodate combined radial and axial loads in one direction, this bearing is used in automotive transmissions, differentials, and wheel hub applications. The 30304JR meets OE specifications and is interchangeable with SKF 30304, Timken 30304, NTN 4T-30304A, and KOYO 30304JR equivalents.
Technical Specifications
| Specification | Value / Detail |
|---|---|
| DH Code | DWB2571 |
| Part Number | 30304JR |
| Product Type | Tapered Roller Bearing – Single Row, Metric Series |
| Bore Diameter (d) | 20.00 mm (0.787 inch) |
| Outer Diameter (D) | 52.00 mm (2.047 inch) |
| Total Width (T) | 16.25 mm (0.640 inch) |
| Cone Width (B) | 15.00 mm (0.591 inch) |
| Cup Width (C) | 13.00 mm (0.512 inch) |
| Dynamic Load Rating (Cr) | 39.0 kN (8,770 lbf) |
| Static Load Rating (C0r) | 32.5 kN (7,310 lbf) |
| Limiting Speed | 14,000 rpm |
| Reference Speed | 12,000 rpm |
| Fatigue Load Limit (Pu) | 3.60 kN (810 lbf) |
| Weight | 0.18 kg (0.40 lb) |
Note: Dimensional and performance data is based on SKF, Timken, and NTN published specifications. Please verify measurements against your original bearing before ordering.
Important: All information on this page is for reference only. Please verify OE numbers, dimensions, and vehicle fitment against your original part before ordering. Contact us for fitment confirmation.
DH Code & OE Numbers & Reference Numbers
DH Code: DWB2571
OE Numbers:
30304JR
Reference Numbers (Interchange):
SKF: 30304
SKF: 30304 J2
Timken: 30304
NTN: 4T-30304A
KOYO: 30304JR
URB: 30304A
FAG: 30304-A
Vehicle Fitment
This tapered roller bearing is used in transmissions, differentials, and wheel hubs across multiple vehicle makes. Please verify fitment with your original part before ordering.
Please verify OE number, dimensions and vehicle configuration before ordering.
Product Features
- Single-row tapered roller design supports combined radial and axial loads in one direction – suitable for transmission, differential, and wheel hub applications.
- Metric-series configuration with 20 mm bore and 52 mm outer diameter matches SKF 30304, Timken 30304, NTN 4T-30304A, and KOYO 30304JR equivalents for direct replacement.
- Separable cup and cone construction simplifies installation and maintenance – inner ring with roller assembly can be mounted independently.
- Heat-treated bearing steel with precision-ground raceways – rated for 39.0 kN dynamic load and 32.5 kN static load.
- Open-type design supports splash lubrication and oil bath systems common in drivetrain applications.
Installation Notes
- Confirm bore diameter (20.00 mm) and outer diameter (52.00 mm) match your existing bearing and housing before installation.
- Inspect the shaft and housing for wear or damage – replace if scoring or pitting is present.
- Set bearing preload according to vehicle manufacturer specifications – tapered rollers require proper adjustment for differential and axle operation.
- When mounted as a single bearing, a second tapered roller bearing is required in mirror-image arrangement to accommodate axial loads in both directions.
- Lubricate with high-quality gear oil or grease – refer to your vehicle service manual for viscosity grade and lubrication method.
About DUHUI Bearing
Manufactured by DUHUI Bearing – an automotive bearing supplier established in Zhejiang, China, in 2003. DUHUI produces tapered roller bearings and automotive components to OE specifications. Contact us
