National A-47 Wheel Bearing and Race Set - Rear Outer

National A-47 Wheel Bearing and Race Set

The National A-47 wheel bearing and race set is built for rear outer wheel service where precise fit and consistent load handling matter. It uses premium-grade steel with crowned raceways and rollers to promote even load distribution in demanding driveline and axle applications.

Compatible with Chevrolet Express 3500 and GMC Savana 3500 rear outer positions, this taper bearing set also fits select Chevrolet Express 3500, GMC Savana 3500, and GMC Sierra applications listed below. The National A-47 is a direct-fit wheel bearing and race set for service work that calls for accurate cone and cup dimensions.

Key Features

• Part number: A-47
• Wheel bearing and race set with taper bearing cone and cup design
• Premium-grade steel construction
• Crowned raceways and rollers for even load distribution
• Cone bore: 2.0000 in. (50.8000 mm)
• Cup bore: 3.2500 in. (82.5500 mm)
• Width: 0.6500 in. (16.5100 mm)
• Taper bearing cone: NP145100
• Taper bearing cup: NP913325

Detailed Description

National A-47 is a taper bearing set engineered for rear outer wheel positions where bearing geometry and race alignment are critical. The cone and cup are matched to the listed dimensions, including a cone length of 0.8750 in. and cup length of 0.6500 in., to support proper seating during service. This part cross-references Timken NP145100 for the same application.

For Chevrolet Express 3500 and GMC Savana 3500 rear outer service, the A-47 supports dual rear wheel applications on 2003-2018 models and continues through 2019-2021 coverage as listed. It also fits 2011-2012 GMC Sierra, rear outer. Use the National A-47 when you need a wheel bearing and race set that matches the specified cone and cup design for these vehicle applications.

What It Helps Address

• Rear wheel bearing noise from worn taper rollers or race surfaces
• Excessive wheel end play caused by bearing wear
• Rough rotation from damaged cone or cup surfaces
• Service replacement needs on rear outer wheel positions
• Fitment issues when the original bearing and race dimensions must match exactly

Installation Notes and Tips

Verify the cone and cup dimensions against the original parts before installation. Clean the hub and spindle surfaces thoroughly, inspect for scoring or heat damage, and replace worn mating components as needed. Confirm rear outer position fitment for the specific Chevrolet Express 3500, GMC Savana 3500, or GMC Sierra application before assembly.

Quality Assurance

National manufactures this taper bearing set with premium-grade steel and crowned raceways and rollers to support even load distribution. The A-47 is built to the listed dimensional specifications for consistent service fitment in the applications shown.