{"product_id":"a-28521-i-ai-cup-tapered-bearing","title":"A-28521-I-AI Cup, Tapered Bearing","description":"\u003ch3\u003eOne New Aftermarket Replacement Tapered Roller Bearing Cup - 28521 Series\u003c\/h3\u003e\u003cp\u003eThis tapered roller bearing cup (outer ring\/race) serves as the outer raceway for a 28521-series tapered roller bearing assembly. It pairs with a matching cone (inner ring and roller assembly) to handle both radial and axial loads in wheel hubs, transmissions, differentials, axles, gearboxes, and related assemblies across agricultural, construction, and industrial equipment.\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePart Number: 28521 (A-28521-I-AI)\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 3.625\"\u003c\/li\u003e\n\u003cli\u003eWidth: 0.781\"\u003c\/li\u003e\n\u003cli\u003eFillet Radius: 0.03\"\u003c\/li\u003e\n\u003cli\u003eBearing Series: 28500 Imperial Series\u003c\/li\u003e\n\u003cli\u003eType: Single Tapered Roller Bearing Cup (Outer Race)\u003c\/li\u003e\n\u003cli\u003eMaterial: Steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatible Applications\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eAgricultural Equipment:\u003c\/strong\u003e Tractors, combines, and other farming machinery requiring durable load support.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eConstruction Equipment:\u003c\/strong\u003e Heavy machinery including excavators, bulldozers, and construction vehicles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIndustrial and Trailer Applications:\u003c\/strong\u003e Gearboxes, hoisting equipment, steer axles, drive axles, and trailer axle assemblies (compatible with 10K lb general duty axles using spindle #99).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAutomotive:\u003c\/strong\u003e Wheel hubs, transmissions, and differentials.\u003c\/p\u003e\u003cp\u003eMates with cone bearing 28580. Verify application fitment before ordering.\u003c\/p\u003e\u003ch4\u003eReplaces Part Number(s):\u003c\/h4\u003e\u003cp\u003e28521, A-28521-I-AI\u003c\/p\u003e\u003ch4\u003eAftermarket Interchange Numbers\u003c\/h4\u003e\u003cp\u003eTimken 28521, Peer Bearing 28521, NSK 28521, BR-28521, 68K28521 (Komatsu application), EXP-028521\u003c\/p\u003e\u003cp\u003eNew aftermarket replacement part - not remanufactured, not used.\u003c\/p\u003e","brand":"Reliable Aftermarket Parts, Inc® -OD","offers":[{"title":"Default Title","offer_id":40008293285971,"sku":"A-28521-I-AI","price":33.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/4060\/3955\/files\/A-28521-I-AI_01.jpg?v=1757620584","url":"https:\/\/www.reliableaftermarketparts.co.uk\/products\/a-28521-i-ai-cup-tapered-bearing","provider":"Reliable Aftermarket Parts, Inc®","version":"1.0","type":"link"}