A-28521-I-AI Cup, Tapered Bearing

One New Aftermarket Replacement Tapered Roller Bearing Cup - 28521 Series

This 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.

Specifications

• Part Number: 28521 (A-28521-I-AI)
• Outside Diameter: 3.625"
• Width: 0.781"
• Fillet Radius: 0.03"
• Bearing Series: 28500 Imperial Series
• Type: Single Tapered Roller Bearing Cup (Outer Race)
• Material: Steel

Compatible Applications

Agricultural Equipment: Tractors, combines, and other farming machinery requiring durable load support.

Construction Equipment: Heavy machinery including excavators, bulldozers, and construction vehicles.

Industrial and Trailer Applications: Gearboxes, hoisting equipment, steer axles, drive axles, and trailer axle assemblies (compatible with 10K lb general duty axles using spindle #99).

Automotive: Wheel hubs, transmissions, and differentials.

Mates with cone bearing 28580. Verify application fitment before ordering.

Replaces Part Number(s):

28521, A-28521-I-AI

Aftermarket Interchange Numbers

Timken 28521, Peer Bearing 28521, NSK 28521, BR-28521, 68K28521 (Komatsu application), EXP-028521

New aftermarket replacement part - not remanufactured, not used.