National 15250X Differential Pinion Race - Front Inner, Front Outer or Rear Outer

Overview of National 15250X Differential Pinion Race

The National 15250X differential pinion race is engineered for precision and durability in driveline applications. Designed specifically for Bentley Continental and Rolls-Royce Phantom models, this taper bearing cup ensures reliable performance in demanding conditions.

• Cup Bore Diameter: 2.5000 inches (63.5 mm)
• Cup Length: 0.6250 inches (15.875 mm)
• Cup Radius: 0.0620 inches (1.575 mm)
• Part Type: Taper bearing cup
• Compatible with Bentley Continental and Rolls-Royce Phantom

Technical Specifications and Features

The 15250X differential pinion race features a precisely machined cup bore of 2.5 inches (63.5 mm) to fit securely within the differential assembly. Its cup length of 0.625 inches (15.875 mm) and cup radius of 0.062 inches (1.575 mm) are designed to maintain optimal bearing alignment and load distribution. This taper bearing cup is critical for supporting the pinion gear shaft, reducing friction, and ensuring smooth rotational movement within the differential.

Application and Compatibility

This National differential pinion race is compatible with select luxury vehicles, specifically the Bentley Continental and Rolls-Royce Phantom. It is intended for use in the driveline and axle assemblies where precise bearing fitment is essential for vehicle stability and drivetrain efficiency.

• Supports proper pinion gear alignment in the differential
• Reduces wear and tear on differential components
• Prevents premature bearing failure
• Maintains smooth differential operation under load
• Helps eliminate noise and vibration from driveline

Installation Notes and Tips

When installing the National 15250X differential pinion race, ensure the cup bore and seating surfaces are clean and free of debris. Use appropriate tools to press the bearing cup evenly into the differential housing to avoid distortion. Verify the cup length and radius match OEM specifications for the Bentley Continental or Rolls-Royce Phantom to maintain proper bearing preload and alignment.

Quality Assurance and Warranty

National manufactures the 15250X differential pinion race to meet strict industry standards for durability and precision. While specific warranty details may vary, National products typically come with a limited warranty against defects in materials and workmanship, providing confidence in long-term performance for Bentley Continental and Rolls-Royce Phantom driveline repairs.