National 517009 Wheel Bearing - Front Inner

Overview of National 517009 Wheel Bearing

The National 517009 wheel bearing is engineered for reliable driveline performance in select Chevrolet, Geo, GMC, Pontiac, and Suzuki vehicles. Designed to meet precise specifications, this wheel bearing supports smooth wheel rotation and helps maintain vehicle stability.

• Compatible with Chevrolet LUV, Geo Tracker, GMC Sonoma, Pontiac Sunrunner, Suzuki Sidekick, Vitara, and X-90 models
• Bore diameter of 1.614 inches (41 mm) ensures accurate fitment
• Outer diameter measures 2.677 inches (68 mm) for proper seating
• Cone length of 1.575 inches (40 mm) and cup length of 1.378 inches (35 mm) for balanced load distribution
• Gen1 design providing standard durability and performance

Technical Specifications and Design Details

The National 517009 wheel bearing features a bore size of approximately 1.614 inches (41 mm), which is critical for fitting the axle shaft securely. The cone length of 1.575 inches (40 mm) and cone radius of 0.126 inches (3.2 mm) contribute to the bearing’s ability to handle radial and axial loads effectively. The cup length is 1.378 inches (35 mm) with a cup radius of 0.0394 inches (1 mm), ensuring proper alignment within the hub assembly. The outer race width of 1.378 inches (35 mm) and an outside diameter of 2.677 inches (68 mm) provide a stable interface with the wheel hub. This Gen1 design is consistent with original equipment specifications for the listed vehicle models.

Applications and Problem Solving

This wheel bearing is intended for use in the front or rear wheel hubs of compatible vehicles, supporting smooth wheel rotation and reducing friction. It addresses common driveline issues such as:

• Excessive wheel play or looseness
• Unusual noises like grinding or humming from the wheel area
• Uneven tire wear caused by bearing failure
• Vibration or wobbling during vehicle operation
• Potential wheel hub overheating due to bearing degradation

Installation Notes and Tips

Proper installation of the National 517009 wheel bearing requires careful attention to fitment dimensions and torque specifications. It is recommended to:

• Verify compatibility with your specific Chevrolet LUV, Geo Tracker, Pontiac Sunrunner, Suzuki Sidekick, Vitara, or GMC model before installation
• Clean the hub assembly thoroughly to remove debris and old grease
• Use appropriate tools to press the bearing into place without damaging the cone or cup surfaces
• Apply manufacturer-recommended grease to ensure optimal bearing lubrication
• Check wheel alignment and torque wheel nuts to factory specifications after installation

Quality Assurance and Warranty

National wheel bearings, including part number 517009, are manufactured to meet industry standards for durability and performance. The Gen1 design aligns with original equipment requirements, providing consistent reliability. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in product quality.