National 552A Wheel Bearing Race - Front Outer

National 552A Taper Bearing Cup

National 552A is a taper bearing cup built for driveline and axle service where precise raceway geometry matters. Manufactured from premium-grade steel with a crowned raceway profile, it supports even load distribution in wheel bearing applications.

Use this wheel bearing race when servicing compatible axle and hub assemblies on vehicles such as Ford F-150 and Chevrolet C/K truck applications that call for the 552A specification.

Key Features

• Premium-grade steel construction for bearing cup durability
• Crowned raceway helps distribute load more evenly across the bearing surface
• Part description: taper bearing cup
• Cup bore: 4.8750 in. (123.8250 mm)
• Cup length: 1.1875 in. (30.1630 mm)
• Cup radius: 0.1250 in. (3.1750 mm)
• National part number 552A for direct catalog lookup

Detailed Description

This National wheel bearing race is engineered as a taper bearing cup for driveline and axle assemblies that require accurate bearing support and consistent contact geometry. The premium steel construction and crowned raceway design help maintain even load distribution, which is important in wheel bearing service where alignment and surface quality affect performance. The 552A part number is also referenced across multiple aftermarket catalogs, making it easier to match during replacement work on Ford F-150 and Chevrolet C/K truck applications.

This part cross-references SKF 7414 and 40129 for the same application.

What It Helps Address

• Wheel bearing race wear or surface damage
• Noise caused by a worn taper bearing cup
• Uneven bearing load across the raceway
• Service issues in axle and hub bearing assemblies
• Replacement needs for National 552A wheel bearing race applications

Installation Notes and Tips

Verify cup bore, length, and radius against the original race before installation. Clean the hub or axle housing thoroughly, inspect the bearing rollers and related components, and press the cup squarely into place to avoid raceway damage. Confirm the application by part number 552A and compare the removed component to the replacement before final assembly.

Quality Assurance

National manufactures this taper bearing cup with premium-grade steel and a crowned raceway profile to support consistent bearing contact and load distribution. The 552A specification is widely cataloged across the aftermarket for wheel bearing race replacement.