National 39412 Wheel Bearing Race - Rear Outer

National 39412 Wheel Bearing Race Overview

The National 39412 wheel bearing race is a precision-engineered taper bearing cup designed to meet the demanding requirements of driveline and axle assemblies. With exact dimensions including a 4.1250 inch (104.775 mm) cup bore and a 0.6250 inch (15.875 mm) cup length, this component ensures proper fit and function in compatible vehicle wheel hubs.

• Taper bearing cup with a cup bore diameter of 4.1250 inches (104.775 mm)
• Cup length measures 0.6250 inches (15.875 mm) for accurate seating
• Cup radius of 0.0799 inches (2.030 mm) designed for optimal bearing contact
• Part number 39412 for precise identification and ordering
• Manufactured by National, a recognized brand in driveline components

Detailed Product Description

The National 39412 wheel bearing race is engineered to provide a reliable surface for the tapered roller bearings used in automotive wheel hubs. The cup bore diameter of 4.1250 inches (104.775 mm) and the cup length of 0.6250 inches (15.875 mm) are critical dimensions that ensure compatibility with specific axle and hub assemblies. The cup radius of 0.0799 inches (2.030 mm) is designed to maintain proper bearing alignment and load distribution, reducing wear and extending service life. This part is essential for maintaining the integrity of the wheel bearing system in vehicles such as Ford F-150, Chevrolet Silverado, and Dodge Ram models that require this specification.

Common Applications and Problem Solving

• Replaces worn or damaged wheel bearing races to restore smooth wheel rotation
• Addresses wheel hub noise caused by bearing race wear or pitting
• Prevents premature bearing failure due to improper race dimensions
• Corrects wheel vibration issues related to bearing race damage
• Supports safe and stable vehicle handling by maintaining proper bearing fit

Installation Notes and Tips

• Ensure the wheel hub and spindle are clean and free of debris before installation
• Use a proper bearing race driver tool to avoid damaging the cup during installation
• Verify the cup bore and length dimensions match the vehicle’s specifications
• Apply appropriate lubrication to the bearing surfaces before assembly
• Consult the vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

National manufactures the 39412 wheel bearing race to meet industry standards for durability and precision. While specific warranty details are not provided, National products typically undergo rigorous quality control to ensure consistent performance in automotive driveline applications.