National 30303 Wheel Bearing and Race Set - Front or Front Outer

Overview of National 30303 Wheel Bearing and Race Set

The National 30303 wheel bearing and race set is designed specifically for Toyota Land Cruiser models, providing precise fitment and reliable performance. This taper bearing assembly ensures smooth driveline operation and durability under demanding conditions.

• Compatible with Toyota Land Cruiser vehicles
• Part number 30303 for accurate identification
• Iso metric design for standardized fit
• Bore diameter of 0.6693 inches (17.00 mm)
• Outside diameter of 1.8504 inches (47.00 mm)
• Cone length of 0.5512 inches (14.00 mm) and cup length of 0.4724 inches (11.998 mm)
• Width of 0.6004 inches (15.25 mm) for proper seating
• Includes cone and cup with 0.0600 inch (1.524 mm) radius

Technical Specifications and Design Details

The National 30303 wheel bearing and race set features an iso metric taper bearing assembly designed to meet the exacting standards required for Toyota Land Cruiser driveline components. The bore size of 0.6693 inches (17 mm) ensures a precise fit on the axle shaft, while the outside diameter of 1.8504 inches (47 mm) matches the hub assembly specifications. The cone and cup lengths of 0.5512 inches (14 mm) and 0.4724 inches (12 mm) respectively provide the correct bearing surface area for load distribution. The 0.0600 inch (1.524 mm) radius on both cone and cup helps reduce stress concentrations, contributing to longer service life. The overall width of 0.6004 inches (15.25 mm) supports proper bearing alignment and function within the wheel hub.

Applications and Problem Resolution

This wheel bearing and race set is intended for use in the driveline and axle assembly of Toyota Land Cruiser vehicles. It addresses several common issues related to wheel bearings, including:

• Eliminating wheel hub noise caused by worn or damaged bearings
• Reducing wheel vibration and improving ride quality
• Preventing premature bearing failure due to improper fit or wear
• Restoring proper wheel alignment and rotational smoothness
• Ensuring safe and reliable driveline performance

Installation Notes and Tips

When installing the National 30303 wheel bearing and race set on a Toyota Land Cruiser, ensure the following:

• Clean the hub and axle shaft thoroughly before installation
• Use appropriate tools to press the cone and cup into place without damage
• Verify the bearing is seated fully and evenly to avoid premature wear
• Apply recommended lubrication to the bearing surfaces
• Check for proper torque specifications on the wheel hub assembly

Quality Assurance and Warranty Information

National wheel bearings are manufactured to meet industry standards for durability and performance. The 30303 wheel bearing and race set undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product's reliability for Toyota Land Cruiser applications.