National A-49 Wheel Bearing and Race Set - Rear

National A-49 Wheel Bearing and Race Set Overview

The National A-49 wheel bearing and race set is designed specifically for Jeep Grand Cherokee and Liberty models. This taper bearing set ensures precise fitment and reliable performance for driveline and axle maintenance.

• Includes taper bearing cone (Np182140) and cup (Np645406)
• Cone bore diameter: 1.3775 inches (34.989 mm)
• Cone length: 0.8110 inches (20.599 mm)
• Cone radius: 0.0900 inches (2.286 mm)
• Cup bore diameter: 2.5581 inches (64.976 mm)
• Cup length: 0.6693 inches (17.000 mm)
• Cup radius: 0.0500 inches (1.270 mm)
• Width: 0.8110 inches (20.599 mm)
• Components are sold as a set and not available separately

Detailed Product Description

The National A-49 wheel bearing and race set is engineered to meet the exact specifications required for Jeep Grand Cherokee and Liberty vehicles. This taper bearing set includes both the cone and cup components, designed to work together to provide smooth rotation and reduce friction in the wheel hub assembly. The cone bore measures 1.3775 inches (34.989 mm) with a length of 0.8110 inches (20.599 mm), while the cup bore is 2.5581 inches (64.976 mm) with a length of 0.6693 inches (17.000 mm). The precise cone and cup radii ensure proper seating and alignment within the axle assembly, contributing to consistent driveline performance.

Compatible Vehicles and Applications

This wheel bearing and race set is compatible with Jeep Grand Cherokee and Jeep Liberty models, making it a suitable replacement part for maintaining or repairing the driveline and axle components. The part number A-49 corresponds directly to these applications, ensuring correct fitment and function.

• Eliminates wheel bearing noise and vibration
• Restores proper wheel hub rotation
• Prevents premature wear of axle components
• Addresses wheel play and looseness
• Improves overall driveline stability

Installation Notes and Tips

When installing the National A-49 wheel bearing and race set, ensure the hub and spindle surfaces are clean and free of debris. Proper seating of the taper bearing cone and cup is critical to avoid premature failure. Use appropriate tools to press the cup into the hub and the cone onto the spindle. Follow vehicle-specific torque specifications and procedures for bearing preload adjustment to maintain optimal performance.

Quality Assurance and Warranty

National wheel bearing and race sets are manufactured to meet industry standards for durability and precision. The A-49 set undergoes rigorous quality control to ensure consistent dimensions and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product's reliability.