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National RW-507-ER Wheel Bearing - Rear
Overview of National RW-507-ER Wheel Bearing
The National RW-507-ER wheel bearing is engineered for reliable driveline performance in select Chevrolet and Pontiac vehicles. Designed as a single row radial bearing, it offers precise fitment and durability for models like the Chevrolet Bel Air, Corvette, and Pontiac Laurentian.
- Single row radial design for consistent load handling
- Inner race bore diameter of 1.378 inches (35 mm)
- Outer race outside diameter of 2.835 inches (72 mm)
- Overall width of 0.925 inches (33.35 mm)
- Compatible with Chevrolet Bel Air, Corvette, and Pontiac Laurentian
Technical Specifications and Design Details
This wheel bearing features a 35 mm (1.378 inch) bore and an inner race width of 0.925 inches (23.495 mm), ensuring a secure fit on the axle shaft. The outer race measures 2.835 inches (72 mm) in diameter with a width of 0.886 inches (22.5 mm), providing a stable housing interface. The inner race radius of 0.100 inches (2.54 mm) and outer race radius of 0.040 inches (1.016 mm) contribute to smooth rotation and reduced friction. The single row radial design supports radial loads typically encountered in driveline applications for the specified vehicle models.
Compatible Vehicles and Applications
The National RW-507-ER wheel bearing is compatible with the following vehicles:
- Chevrolet Bel Air
- Chevrolet Corvette
- Pontiac Laurentian
This part is specifically designed to meet the fitment requirements of these classic and performance vehicles, ensuring proper axle alignment and wheel rotation.
Common Issues Addressed by This Wheel Bearing
- Eliminates wheel play and vibration caused by worn bearings
- Prevents premature wear of axle components due to improper fit
- Reduces noise and roughness during wheel rotation
- Maintains proper wheel alignment and driveline stability
- Supports safe and smooth vehicle handling
Installation Notes and Tips
- Ensure the bearing bore and axle shaft dimensions match the specified 1.378 inch (35 mm) diameter
- Use proper tools to press the bearing into the hub without damaging the races
- Clean and inspect the hub and spindle surfaces before installation
- Apply appropriate lubrication as recommended for wheel bearings
- Verify correct seating of the bearing to avoid premature failure
Quality Assurance and Warranty Information
National wheel bearings are manufactured to meet industry standards for durability and performance. The RW-507-ER part number undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product's reliability for Chevrolet Bel Air, Corvette, and Pontiac Laurentian applications.
| Brand | National |
| Part Number | RW-507-ER |
| Bore (Inch) | 1.378 |
| Bore (mm) | 35.000 |
| Design | Single Row Radial |
| Inner Race Bore (Inch) | 1.378 |
| Inner Race Bore (MM) | 35.000 |
| Inner Race Radius (Inch) | 0.100 |
| Inner Race Radius (MM) | 2.540 |
| Inner Race Width (Inch) | 0.925 |
| Inner Race Width (MM) | 23.495 |
| Outer Race Outside Diameter (Inch) | 2.835 |
| Outer Race Outside Diameter (MM) | 72.000 |
| Outer Race Radius (Inch) | 0.040 |
| Outer Race Radius (MM) | 1.016 |
| Outer Race Width (Inch) | 0.886 |
| Outer Race Width (MM) | 22.500 |
| Outside Diameter (Inch) | 2.835 |
| Outside Diameter (mm) | 72.000 |
| Part Description | Wheel Bearing |
| Series | RWS |
| Type | F-2 |
| Width (Inch) | 0.925 |
| Width (mm) | 33.350 |
This part fits 5 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1956 | Chevrolet | Bel Air | Rear | Bearing and Ring included |
| 1956 | Chevrolet | Corvette | Rear | Bearing and Ring included |
| 1956 | Pontiac | Laurentian | Rear | Bearing and Ring included |
| 1955 | Chevrolet | Bel Air | Rear | Bearing and Ring included |
| 1955 | Pontiac | Laurentian | Rear | Bearing and Ring included |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.