National 13621 Wheel Bearing Race - Front Inner

National 13621 Taper Bearing Cup

National 13621 is a taper bearing cup made from premium-grade steel for wheel bearing service in driveline and axle applications. Its crowned raceway helps distribute load evenly across the bearing surface, supporting consistent operation in wheel bearing assemblies.

Key Features

• Premium-grade steel construction for wheel bearing use
• Crowned raceway for even load distribution
• Cup bore: 2.7170 in. / 69.0120 mm
• Cup length: 0.5938 in. / 15.0830 mm
• Cup radius: 0.0930 in. / 2.3620 mm
• Part description: taper bearing cup

Detailed Description

This National wheel bearing race is built for tapered roller bearing applications where precise cup geometry matters. The 13621 part number is commonly searched for wheel bearing race replacement, taper bearing cup replacement, and driveline and axle repair work. It is also referenced in cross applications such as SKF BR13621 and Continental 13621. For buyers servicing wheel bearing assemblies on agricultural, light truck, or industrial equipment, National 13621 provides the dimensional consistency needed for proper bearing seating and load transfer.

Search terms such as National 13621 wheel bearing race, taper bearing cup 2.7170 bore, and replacement bearing cup for axle service often point to this type of component. If you are matching an existing race by dimensions or part number, National 13621 is a direct reference point for the correct taper bearing cup specification.

What It Helps Address

• Worn or pitted bearing race surfaces
• Noise from a damaged wheel bearing assembly
• Uneven bearing load distribution
• Loss of proper bearing seating in the hub or axle assembly
• Replacement needs during wheel bearing service

Installation Notes and Tips

Verify cup bore, length, and radius against the original race before installation. Clean the hub or bearing seat thoroughly and inspect the mating bearing components for wear or scoring. Proper press-fit installation and correct bearing preload are important for long-term service life. Confirm application by part number and dimensions when servicing wheel bearing assemblies on compatible make/model platforms.

Quality Assurance

National manufactures this taper bearing cup with premium-grade steel and a crowned raceway profile to support even load distribution in bearing service. Part number 13621 is backed by National’s established bearing component manufacturing standards.