National 563 Wheel Bearing Race - Rear Inner

National 563 Wheel Bearing Race Overview

The National 563 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 5.0000 inch (127 mm) cup bore and a 1.1250 inch (28.575 mm) cup length, this component ensures proper fit and function in compatible vehicle wheel hubs.

• Taper bearing cup with a 5.0000 inch (127 mm) cup bore diameter
• 1.1250 inch (28.575 mm) cup length for accurate seating
• 0.1250 inch (3.175 mm) cup radius for optimal bearing contact
• Part number 563 for precise identification and replacement
• Manufactured by National for consistent quality in driveline applications

Detailed Product Description

The National 563 wheel bearing race is engineered to provide a reliable surface for the tapered roller bearing to operate smoothly within the wheel hub assembly. The 5.0000 inch cup bore and 1.1250 inch cup length dimensions are critical for maintaining proper bearing preload and alignment, which directly affects wheel performance and longevity. The 0.1250 inch cup radius is designed to match the bearing geometry, reducing wear and ensuring even load distribution. This part is commonly used in driveline and axle systems where precise bearing fitment is essential.

Applications and Problem Solving

• Replaces worn or damaged wheel bearing races in compatible vehicles
• Addresses issues related to wheel bearing noise and roughness
• Prevents premature bearing failure caused by improper seating
• Restores proper bearing alignment to reduce vibration and uneven tire wear
• Supports driveline integrity by maintaining correct bearing preload

Installation Notes and Tips

Ensure the wheel hub and spindle surfaces are clean and free of debris before installation. Use appropriate tools to press the bearing race evenly into the hub bore to avoid distortion. Verify the cup bore diameter of 5.0000 inches matches the hub specifications for a secure fit. Proper installation is critical to avoid bearing misalignment and premature wear.

Quality Assurance and Warranty

National manufactures the 563 wheel bearing race to meet industry standards for durability and precision. While specific warranty details are not provided, National products typically adhere to strict quality control processes to ensure reliable performance in automotive driveline applications.