{"product_id":"national-a-12-wheel-bearing-and-race-set","title":"National A-12 Wheel Bearing and Race Set - Front Lower, Front Outer or Rear Outer","description":"\u003ch2\u003eNational A-12 Wheel Bearing and Race Set Overview\u003c\/h2\u003e\u003cp\u003eThe National A-12 wheel bearing and race set is engineered for precision and durability in driveline applications. Designed to meet the specifications required by various BMW, Mercedes-Benz, Ford, and Volkswagen models, this taper bearing set ensures reliable wheel performance and smooth rotation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIncludes taper bearing cone (LM12749) and cup (LM12710)\u003c\/li\u003e\n\u003cli\u003eCone bore diameter: 0.8661 inches (21.999 mm)\u003c\/li\u003e\n\u003cli\u003eCone length: 0.6550 inches (16.637 mm)\u003c\/li\u003e\n\u003cli\u003eCup bore diameter: 1.7810 inches (45.237 mm)\u003c\/li\u003e\n\u003cli\u003eCup length: 0.4750 inches (12.065 mm)\u003c\/li\u003e\n\u003cli\u003eStandout dimension: 0.0135 inches (0.343 mm)\u003c\/li\u003e\n\u003cli\u003eWidth: 0.6100 inches (15.494 mm)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications and Compatibility\u003c\/h2\u003e\u003cp\u003eThe National A-12 bearing set features a taper bearing cone and cup designed to fit a range of vehicles including BMW 300CE, 500SL, and 735i models, Mercedes-Benz C220, E320, and SL55 AMG, as well as Ford F-150 and Lincoln Navigator. The precise cone bore and cup bore measurements ensure a secure fit and optimal bearing performance. The cone radius and cup radius both measure 0.0500 inches (1.270 mm), contributing to consistent load distribution and reduced wear.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Resolution\u003c\/h2\u003e\u003cp\u003eThis wheel bearing and race set is used primarily in the driveline and axle assemblies to support wheel rotation and maintain alignment. It addresses common issues such as:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcessive wheel play or looseness\u003c\/li\u003e\n\u003cli\u003eNoise or grinding from worn bearings\u003c\/li\u003e\n\u003cli\u003eUneven tire wear due to bearing failure\u003c\/li\u003e\n\u003cli\u003eVibration or wobbling during vehicle operation\u003c\/li\u003e\n\u003cli\u003ePreventing premature axle or hub damage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eProper installation of the National A-12 wheel bearing and race set requires careful cleaning of the hub and spindle surfaces. Use appropriate tools to press the cone and cup into place without damaging the bearing surfaces. Ensure the standout measurement of 0.0135 inches (0.343 mm) is maintained for correct preload. It is recommended to inspect related components such as seals and hubs during installation to ensure overall driveline integrity.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNational wheel bearing sets are manufactured to meet industry standards for durability and performance. The A-12 part number is backed by quality control processes to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National products typically come with a limited warranty against defects in materials and workmanship, providing confidence in long-term use for compatible BMW, Mercedes-Benz, Ford, and Volkswagen vehicles.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":43448396611765,"sku":"BCZK-A-12","price":17.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NS_A12_Ang.jpg?v=1774734827","url":"https:\/\/www.partcatalog.com\/products\/national-a-12-wheel-bearing-and-race-set","provider":"PartCatalog","version":"1.0","type":"link"}