National B-40 Wheel Bearing - Front Inner

Overview of National B-40 Wheel Bearing for Chevrolet and Pontiac

The National B-40 wheel bearing is engineered for reliable driveline performance in classic vehicles such as the Chevrolet Bel Air and Pontiac Laurentian. Designed as a single row angular contact bearing, it offers precise fitment and durability for these specific models.

• Single row angular contact design for optimized load handling
• Inner race bore diameter of 1.250 inches (31.760 mm)
• Outer race outside diameter of 2.564 inches (65.126 mm)
• Width of approximately 0.759 inches (19.279 mm)
• Compatible with Chevrolet Bel Air and Pontiac Laurentian models

Technical Specifications and Design Details

The National B-40 wheel bearing features a single row angular contact design, which provides effective support for both radial and axial loads. The inner race has a bore diameter of 1.250 inches (31.760 mm), an outside diameter of 1.781 inches (45.237 mm), and a width of 0.750 inches (19.050 mm). The outer race measures 2.110 inches (53.594 mm) in bore diameter, 2.564 inches (65.126 mm) in outside diameter, and 0.563 inches (14.300 mm) in width. The overall bearing width is 0.759 inches (19.279 mm), making it suitable for precise installation in the wheel hub assembly of the Chevrolet Bel Air and Pontiac Laurentian.

Applications and Problem Solving

This wheel bearing is specifically designed for use in the driveline and axle assemblies of Chevrolet Bel Air and Pontiac Laurentian vehicles. It addresses common issues such as:

• Excessive wheel play or looseness
• Noise or roughness during wheel rotation
• Premature bearing wear due to improper fitment
• Vibration or instability at higher speeds
• Seal failure leading to contamination and bearing damage

Installation Notes and Tips

When installing the National B-40 wheel bearing, ensure the following for optimal performance:

• Clean the hub and surrounding components thoroughly before installation
• Use proper tools to press the bearing into place without damaging the races
• Verify the bearing orientation matches the single row angular contact design requirements
• Check for correct fitment with the Chevrolet Bel Air or Pontiac Laurentian wheel hub assembly
• Apply appropriate lubrication as specified by vehicle manufacturer guidelines

Quality Assurance and Warranty Information

National wheel bearings are manufactured to meet industry standards for durability and precision. The B-40 bearing undergoes rigorous quality control to ensure consistent performance in Chevrolet Bel Air and Pontiac Laurentian applications. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product's reliability.