National 14138A Wheel Bearing - Front Inner or Rear

National 14138A Taper Bearing Cone

National 14138A is a taper bearing cone built with premium-grade steel and crowned raceways and rollers to promote even load distribution. It is a direct-fit wheel bearing component for select applications, including 1987-1988 Aston Martin Zagato front inner and 1956-1961 Ford Escort rear with Ford Europe axle.

Key Features

• Taper bearing cone for wheel bearing service
• Premium-grade steel construction
• Crowned raceways and rollers for even load distribution
• Cone bore: 1.3750 in. / 34.9250 mm
• Cone length: 0.7710 in. / 19.5830 mm
• Cone radius: 0.1400 in. / 3.5560 mm
• National 14138A part number for ordering and cross-reference

Detailed Description

This National wheel bearing cone is engineered for driveline and axle service where precise roller contact and stable load handling matter. The crowned raceway profile helps distribute load more evenly across the bearing surface, while the steel construction supports consistent performance in demanding wheel-end applications. National 14138A is listed for 1987-1988 Aston Martin Zagato front inner and 1956-1961 Ford Escort rear with Ford Europe axle, making it a fitment-specific replacement for those vehicles. This part cross-references SKF 14138-A for the same application.

What It Helps Address

• Wheel-end noise caused by worn bearing surfaces
• Excessive play or looseness in the hub assembly
• Rough rotation from damaged rollers or raceways
• Uneven bearing load distribution in service
• Restoration work on Aston Martin Zagato and Ford Escort axle assemblies

Installation Notes and Tips

Verify cone bore, length, and radius against the original bearing before installation. Clean and inspect the hub, spindle, and mating bearing surfaces for wear, scoring, or contamination before assembly. Use proper bearing grease and follow the vehicle service procedure for preload, adjustment, and seal inspection. For fitment confirmation, match the application to 1987-1988 Aston Martin Zagato front inner or 1956-1961 Ford Escort rear with Ford Europe axle.

Quality Assurance

National manufactures this taper bearing cone with premium-grade steel and crowned raceways and rollers to support even load distribution. National 14138A is a cataloged replacement bearing cone for the listed applications and is identified by the National part number 14138A.