National 47678 Wheel Bearing - Rear Inner

National 47678 Taper Bearing Cone Overview

The National 47678 wheel bearing cone is engineered for precise fitment and reliable performance in driveline and axle assemblies. Designed with exacting dimensions, this taper bearing cone supports smooth wheel rotation and helps maintain vehicle stability.

• Cone bore diameter: 3.0000 inches (76.2 mm)
• Cone length: 1.3125 inches (33.338 mm)
• Cone radius: 0.2500 inches (6.35 mm)
• Part type: Taper bearing cone
• Category: Wheel Bearings, Seals, and Related Components

Detailed Specifications and Design

The National 47678 taper bearing cone features a 3-inch (76.2 mm) bore diameter, ensuring compatibility with specific axle shaft sizes commonly found in various vehicle makes and models. Its 1.3125-inch (33.338 mm) cone length and 0.25-inch (6.35 mm) cone radius are designed to provide optimal contact and load distribution within the bearing assembly. This precision-machined component is critical for maintaining proper wheel alignment and reducing friction in the driveline system.

Compatible Vehicles and Applications

This wheel bearing cone is suitable for use in driveline and axle assemblies of select vehicles requiring a 3-inch bore taper bearing cone. While specific make and model fitments should be verified, the National 47678 is commonly referenced in repair and maintenance for vehicles with matching bearing dimensions. It is essential to confirm compatibility with your vehicle’s axle specifications before installation.

• Resolves wheel bearing noise and vibration issues
• Addresses premature bearing wear due to improper fit
• Corrects wheel play and axle shaft misalignment
• Prevents driveline component damage from bearing failure

Installation Notes and Tips

Proper installation of the National 47678 taper bearing cone requires clean and lubricated bearing surfaces. Ensure the cone bore and shaft are free of debris and corrosion before assembly. Use appropriate tools to press the bearing cone into place without damaging the bearing surfaces. Verify correct preload and bearing adjustment according to vehicle manufacturer specifications to avoid premature wear.

Quality Assurance and Warranty

National wheel bearing components are manufactured to meet industry standards for durability and performance. The 47678 taper bearing cone undergoes rigorous quality control to ensure dimensional accuracy and material integrity. Please consult National’s warranty policy for specific coverage details related to this part.