National S-268 Drive Axle Shaft Bearing - Front Left or Front Right

Overview of National S-268 Drive Axle Shaft Bearing

The National S-268 drive axle shaft bearing is engineered for reliable performance in select Ford, Infiniti, Lincoln, Mazda, Mercury, and Nissan vehicles. Designed as a needle bearing, it supports smooth axle rotation and reduces friction in driveline systems.

• Needle bearing type for precise shaft support
• Bore diameter of 1.6250 inches (41.275 mm)
• Outside diameter of 2.0000 inches (50.800 mm)
• Width of 0.5000 inches (12.700 mm)
• Compatible with multiple models including Ford Explorer, Nissan Armada, and Infiniti QX56

Technical Specifications and Design Details

The S-268 bearing features a bore diameter of 1.6250 inches (41.275 mm), matching the shaft diameter range of 1.6245 to 1.6250 inches (41.2623 to 41.275 mm) for a precise fit. Its outside diameter measures 2.0000 inches (50.800 mm), with housing diameters ranging from 2.0000 to 2.0010 inches (50.8000 to 50.8254 mm), ensuring compatibility with standard axle housings. The 0.5000 inch (12.700 mm) width provides adequate surface area for load distribution, contributing to durability under typical driveline stresses.

Compatible Vehicles and Applications

This National drive axle shaft bearing is compatible with a range of vehicles, including Ford Explorer, Explorer Sport, Explorer Sport Trac, Mountaineer, Ranger, B3000, B4000; Infiniti Armada and QX56; Lincoln Aviator; Mazda B3000 and B4000; Mercury Mountaineer; and Nissan Titan and Pathfinder. The part number S-268 ensures correct identification for these models.

Common Issues Addressed by the S-268 Bearing

• Excessive axle shaft play causing vibration or noise
• Premature bearing wear due to improper fit or lubrication
• Axle shaft misalignment affecting driveline performance
• Reduced bearing lifespan from contamination or heat buildup
• Noise or rough rotation in the driveline assembly

Installation Notes and Tips

Ensure the axle shaft and housing dimensions match the specified bore and housing diameters for the S-268 bearing. Clean all mating surfaces thoroughly before installation to prevent contamination. Use appropriate lubrication compatible with needle bearings to reduce friction and wear. Press the bearing evenly into the housing to avoid distortion. Verify proper seating and clearance after installation to maintain driveline integrity.

Quality Assurance and Warranty

National bearings are manufactured to meet industry standards for durability and precision. The S-268 drive axle shaft bearing 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 support long-term reliability in compatible Ford, Infiniti, Lincoln, Mazda, Mercury, and Nissan vehicles.