National 15125 Wheel Bearing - Rear

National 15125 Wheel Bearing Cone Overview

The National 15125 wheel bearing cone is a precision-engineered taper bearing cone designed for driveline and axle applications. With exact dimensions including a 1.2500 inch (31.75 mm) cone bore and a cone length of 0.8125 inch (20.638 mm), this component ensures proper fit and reliable performance in compatible vehicles.

• Brand: National
• Part Number: 15125
• Category: Wheel Bearing Cone for Driveline and Axles
• Cone Bore Diameter: 1.2500 inch (31.75 mm)
• Cone Length: 0.8125 inch (20.638 mm)
• Cone Radius: 0.1400 inch (3.556 mm)
• Part Description: Taper bearing cone

Detailed Specifications and Design

The National 15125 wheel bearing cone features a taper bearing design optimized for axle and driveline assemblies requiring precise bearing fitment. The cone bore diameter of 1.2500 inches (31.75 mm) allows for accurate seating on the axle shaft, while the cone length of 0.8125 inches (20.638 mm) provides the necessary surface area for load distribution. The cone radius of 0.1400 inches (3.556 mm) supports smooth rotation and reduces wear over time. These dimensions are critical for maintaining proper bearing preload and ensuring long-term durability in vehicles such as Ford F-150, Chevrolet Silverado, and Dodge Ram models that specify this part number.

Applications and Problem Resolution

• Replacement for worn or damaged wheel bearing cones in compatible Ford, Chevrolet, and Dodge trucks
• Addresses issues related to wheel bearing noise and vibration
• Helps correct wheel play caused by bearing wear
• Prevents premature bearing failure due to improper fitment
• Supports driveline stability and smooth wheel rotation

Installation Notes and Tips

When installing the National 15125 wheel bearing cone, ensure the axle shaft and bearing surfaces are clean and free of debris. Proper lubrication of the bearing surfaces is essential to prevent premature wear. Use a calibrated torque wrench to apply the correct preload as specified by the vehicle manufacturer. Verify fitment compatibility with your specific make and model before installation to avoid improper seating or damage.

Quality Assurance and Warranty

National wheel bearing cones are manufactured to meet industry standards for durability and precision. While specific warranty details for part number 15125 are not provided, National products typically adhere to strict quality control processes to ensure reliable performance in automotive driveline applications.