National MNJ-471-S Generator Commutator End Bearing

Overview of National MNJ-471-S Generator Commutator End Bearing

The National MNJ-471-S is a precision-engineered generator commutator end bearing designed for reliable electrical system performance. This needle bearing is compatible with a wide range of vehicles including Buick, Chevrolet, Ford, and Jeep models, ensuring proper fit and function in your charging and starting system.

• Needle bearing type for smooth rotation and reduced friction
• Bore diameter of 0.6693 inches (17.00 mm) for accurate shaft fit
• Outside diameter of 0.9449 inches (24.00 mm) for secure housing placement
• Width of 0.6693 inches (17.00 mm) for optimal bearing support
• Compatible with multiple makes and models from 1960s to 1990s

Technical Specifications and Dimensions

The MNJ-471-S features a bore diameter of 0.6693 inches (17.00 mm), designed to fit shafts with diameters ranging from 0.6688 to 0.6699 inches (16.9875 to 17.0155 mm). The housing diameter ranges between 0.937 and 0.938 inches (23.7998 to 23.8252 mm), with an outside diameter of 0.9449 inches (24.00 mm). The bearing width is 0.6693 inches (17.00 mm), providing a compact yet durable profile suitable for generator commutator end applications. This needle bearing type ensures minimal friction and wear, contributing to the longevity of your vehicle’s electrical charging system.

Compatible Vehicles and Applications

This generator commutator end bearing is compatible with a broad range of vehicles, including but not limited to Buick, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Jeep, Lincoln, Mercury, Oldsmobile, Plymouth, and Pontiac. It fits models such as the Chevrolet Camaro, Ford Bronco, Jeep Wrangler, Buick Regal, and Pontiac Firebird, among others. The MNJ-471-S is ideal for use in electrical, charging, and starting systems where precise bearing fitment is critical.

Common Issues Addressed by MNJ-471-S Bearing

• Excessive generator noise due to worn or damaged bearings
• Generator shaft misalignment causing electrical charging problems
• Premature wear of commutator end components
• Reduced generator efficiency from increased friction
• Vibration and operational instability in the charging system

Installation Notes and Tips

When installing the National MNJ-471-S bearing, ensure the shaft and housing dimensions match the specified tolerances for bore and housing diameters. Proper lubrication is recommended to maintain needle bearing performance and reduce wear. Use appropriate tools to press the bearing into place without causing damage. Verify alignment of the generator commutator end to prevent premature bearing failure.

Quality Assurance and Warranty

National bearings are manufactured to meet strict quality standards for durability and performance. The MNJ-471-S is produced with high-grade materials to withstand operational stresses in automotive electrical systems. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their product.