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National 305-D Wheel Bearing - Front Inner or Front Outer
National 305-D Single Row Radial Wheel Bearing Overview
The National 305-D wheel bearing is engineered for reliable driveline performance, featuring a single row radial design. With precise dimensions including a 0.984 inch (25 mm) bore and a 2.441 inch (62 mm) outside diameter, this bearing is suitable for various automotive applications requiring durable and accurate fitment.
- Single row radial ball bearing design for smooth rotation
- Inner race bore diameter of 0.984 inch (25 mm) for precise axle fit
- Outer race outside diameter of 2.441 inch (62 mm) ensuring compatibility with standard hubs
- Width of 0.669 inch (17 mm) for balanced load distribution
- Inner and outer race radius of 0.040 inch (1.02 mm) for optimized stress handling
Technical Specifications and Design Details
The National 305-D wheel bearing belongs to the 300 series and is classified as type A-6. Its single row radial ball bearing design supports radial loads efficiently, making it suitable for wheel hub assemblies in many vehicles. The inner race width and outer race width both measure 0.669 inch (17 mm), providing consistent bearing thickness for proper installation. The precise bore size of 0.984 inch (25 mm) ensures a secure fit on compatible axles, reducing play and wear over time.
Compatible Vehicles and Applications
This wheel bearing is commonly used in driveline and axle assemblies for various makes and models requiring a 25 mm bore and 62 mm outer diameter bearing. It is compatible with vehicles that specify National part number 305-D for their wheel bearing replacement needs. Typical applications include passenger cars and light trucks where a single row radial bearing is specified for wheel hub support.
- Eliminates wheel hub noise caused by worn bearings
- Prevents excessive wheel play and vibration
- Reduces uneven tire wear due to bearing failure
- Addresses axle shaft misalignment issues
- Improves overall driveline stability and safety
Installation Notes and Tips
When installing the National 305-D wheel bearing, ensure the hub and axle surfaces are clean and free of debris. Use proper bearing press tools to avoid damage to the bearing races. Verify the bearing orientation matches the vehicle manufacturer’s specifications. Lubricate the bearing as recommended before installation to ensure optimal performance and longevity.
Quality Assurance and Warranty Information
National wheel bearings are manufactured to meet industry standards for durability and precision. The 305-D part number undergoes rigorous quality control to ensure consistent performance in automotive driveline applications. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s reliability.
| Brand | National |
| Part Number | 305-D |
| Bore (Inch) | 0.984 |
| Bore (mm) | 25.000 |
| Design | Single Row Radial |
| Inner Race Bore (Inch) | 0.984 |
| Inner Race Bore (MM) | 25.000 |
| Inner Race Radius (Inch) | 0.040 |
| Inner Race Radius (MM) | 1.020 |
| Inner Race Width (Inch) | 0.669 |
| Inner Race Width (MM) | 17.000 |
| Outer Race Outside Diameter (Inch) | 2.441 |
| Outer Race Outside Diameter (MM) | 62.000 |
| Outer Race Radius (Inch) | 0.040 |
| Outer Race Radius (MM) | 1.020 |
| Outer Race Width (Inch) | 0.669 |
| Outer Race Width (MM) | 17.000 |
| Outside Diameter (Inch) | 2.441 |
| Outside Diameter (mm) | 62.000 |
| Part Description | Ball Bearing |
| Series | 300 |
| Type | A-6 |
| Width (Inch) | 0.669 |
| Width (mm) | 17.000 |
This part fits 0 vehicles. Search below:
| Year | Make | Model | Position | Notes |
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* 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.