National 18620 Wheel Bearing Race - Front Inner, Front Outer, Rear Inner or Rear Outer

National 18620 Taper Bearing Cup

National 18620 is a taper bearing cup built from premium-grade steel with a crowned raceway profile for even load distribution. It is a rear outer wheel bearing race for a wide range of classic and luxury vehicles, including Jaguar XJ6, Jaguar XJS, Bentley Turbo R, and Rolls-Royce Silver Spirit applications.

• Premium-grade steel construction for wheel bearing service
• Crowned raceway helps distribute load evenly across the bearing surface
• Part description: taper bearing cup
• Cup bore: 3.1250 in. / 79.3750 mm
• Cup length: 0.5313 in. / 13.4950 mm
• Cup radius: 0.0620 in. / 1.5750 mm
• Rear outer position for listed applications

Detailed Application Coverage

This National 18620 wheel bearing race is used in rear outer positions across multiple makes and model lines, including 1972-1987 Jaguar XJ6, 1976-1992 Jaguar XJS, 1981-1995 Rolls-Royce Silver Spirit, 1985-1998 Bentley Continental, and 2000-2004 Aston Martin DB7 rear outer applications. It also cross-references SKF BR18620 for the same application.

For buyers searching for a rear outer wheel bearing race for Jaguar XJ12, Bentley Turbo R, or Rolls-Royce Silver Spur service, National 18620 provides the specified cup dimensions and taper bearing cup construction needed for proper bearing setup. The National 18620 part number is also referenced in interchange listings under multiple OE and aftermarket numbers.

Common Problems This Part Addresses

• Worn or pitted bearing race surfaces
• Excessive wheel bearing noise from the rear axle area
• Uneven bearing load caused by damaged raceways
• Loose or inconsistent bearing fit during hub service
• Rear outer bearing replacement during axle or hub rebuilds

Installation Notes and Tips

Confirm the cup bore, length, and radius against the removed part before installation. Clean the hub or axle housing thoroughly, inspect the bearing rollers and related components, and press the race in squarely to avoid damage to the raceway. Verify rear outer placement and application details for your specific vehicle, especially on Jaguar, Bentley, Rolls-Royce, and Aston Martin rear axle assemblies.

Quality Assurance

National manufactures this taper bearing cup with premium-grade steel and a crowned raceway profile to support even load distribution in service. Part number 18620 is built to the listed dimensional specifications for accurate bearing replacement.