National 387 Wheel Bearing - Rear Outer

Overview of National 387 Wheel Bearing Cone

The National 387 wheel bearing cone is a precision-engineered taper bearing cone designed for driveline and axle applications. With exact dimensions including a 2.2500 inch (57.15 mm) cone bore and a 0.8640 inch (21.946 mm) cone length, this component ensures reliable fitment and performance in compatible vehicles.

• Brand: National
• Part Number: 387
• Category: Wheel Bearing Cone for driveline and axles
• Cone Bore Diameter: 2.2500 inches (57.15 mm)
• Cone Length: 0.8640 inches (21.946 mm)
• Cone Radius: 0.0930 inches (2.362 mm)
• Part Description: Taper bearing cone

Technical Specifications and Features

This National 387 taper bearing cone is manufactured to meet strict dimensional tolerances, ensuring compatibility with specific wheel bearing assemblies. The 2.2500 inch cone bore and 0.8640 inch cone length provide a precise fit for axle shafts requiring this size. The cone radius of 0.0930 inches contributes to proper seating and load distribution within the bearing assembly.

Application and Vehicle Compatibility

Compatible with various driveline and axle systems, the National 387 wheel bearing cone is suitable for vehicles requiring a 2.2500 inch bore taper bearing cone. While specific make and model fitments depend on axle design, this part number is commonly referenced in repair and maintenance for certain domestic and import vehicles. For example, it is often used in wheel bearing assemblies on trucks and SUVs that specify this cone size.

• Resolves wheel bearing noise caused by worn cones
• Addresses excessive play or looseness in wheel hubs
• Prevents premature bearing failure due to improper fit
• Restores proper bearing preload and alignment

Installation Notes and Tips

When installing the National 387 wheel bearing cone, ensure the cone bore and length match the axle shaft specifications exactly. Proper cleaning and inspection of the bearing surfaces are critical before installation. Use appropriate tools to seat the cone without damaging the bearing surfaces. Follow vehicle manufacturer torque specifications for assembly to maintain bearing preload and performance.

Quality Assurance and Warranty

National wheel bearing components are manufactured to meet industry standards for durability and precision. The 387 taper bearing cone undergoes quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support professional repair applications.