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National 39520 Wheel Bearing Race - Front Inner, Rear Inner or Rear Outer
| Brand | National 39520 |
|---|---|
| Position | Rear Inner |
| Cup Bore (Inch) | 4.4375 |
| Cup Bore (MM) | 112.7130 |
| Cup Length (Inch) | 0.9375 |
| Cup Length (MM) | 23.8130 |
| Cup Radius (Inch) | 0.1250 |
| Cup Radius (MM) | 3.1750 |
| Part Description | Taper Bearing Cup |
| Fits | Chevrolet and Dodge · 3 vehicles |
Premium-grade steel. Built for durable wheel bearing support.
Crowned raceways. Promote even load distribution across the bearing.
Taper bearing cup. A precise race for tapered wheel bearings.
Cross-references AMS Automotive 7120, Bosch 15716 and Eastern Catalytic 40437 for the same application. See all 164.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
National 39520 Taper Bearing Cup
The National 39520 wheel bearing race is a taper bearing cup made from premium-grade steel for dependable service in driveline and axle applications. Its crowned raceway helps distribute load more evenly, supporting smoother bearing operation in the rear inner position on select Chevrolet P30 models.
Key Features
- Premium-grade steel construction for wheel bearing service
- Crowned raceway for more even load distribution
- Taper bearing cup design for axle and hub applications
- Cup bore: 4.4375 in. (112.7130 mm)
- Cup length: 0.9375 in. (23.8130 mm)
- Cup radius: 0.1250 in. (3.1750 mm)
- Part number: 39520
Detailed Description
National 39520 is a taper bearing cup engineered for wheel bearing applications where a precise race surface is required. The crowned raceway supports more uniform contact across the bearing, while the premium steel construction is suited to the demands of axle and hub service. This part cross-references SKF BR39520 and SET408 for the same application. Fits 1997-1999 Chevrolet P30, rear inner, with Spicer 80 axle. Fits 1997-1999 Chevrolet P30, rear inner, with Spicer 80 axle. The National 39520 is a direct-fit service part for the specified rear inner position on Chevrolet P30 applications.
Common Repair Uses
- Replacing a worn or pitted bearing race
- Addressing wheel end noise from race surface wear
- Correcting rough bearing rotation in the rear inner hub
- Restoring proper bearing contact in axle service
- Servicing Chevrolet P30 rear axle bearing components
Installation Notes and Tips
Verify cup bore, cup length, and cup radius before installation to confirm proper match to the hub and bearing assembly. Inspect the bearing rollers, hub, and spindle surfaces for wear or scoring before pressing in the new race. Clean all mating surfaces thoroughly and install the cup squarely to avoid damage during seating. For 1997-1999 Chevrolet P30 rear inner applications, confirm the Spicer 80 axle configuration before ordering.
Quality Assurance
National manufactures this taper bearing cup with premium-grade steel and a crowned raceway profile to support consistent load distribution in wheel bearing service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1999 | Chevrolet | P30 | Rear Inner | Fits with Spicer 80 Axle. |
| 1998 | Chevrolet | P30 | Rear Inner | Fits with Spicer 80 Axle. |
| 1997 | Chevrolet | P30 | Rear Inner | Fits with Spicer 80 Axle. |
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