A-28521-P-AI Cup, Tapered Bearing

One New Aftermarket Replacement Tapered Roller Bearing Cup - 28521 Series

This tapered roller bearing cup (outer race) serves as the outer raceway for a 28521-series tapered roller bearing assembly. It pairs with a compatible cone (inner ring and roller assembly) to handle combined radial and axial loads in wheel hubs, axles, transmissions, differentials, and a wide range of agricultural, construction, and industrial machinery applications. The part number A-28521-P-AI corresponds to the industry-standard 28521 cup, also cataloged as Timken 28521, NTN 4T-28521, and National/Federal-Mogul 28521.

Specifications

• Type: Single Tapered Roller Bearing Cup (Outer Race)
• Outside Diameter: 3.625 in (92.08 mm)
• Width: 0.781 in (19.84 mm)
• Corner Radius: 0.03 in
• Material: Steel
• Series: 28500

Compatible Applications

This is an industry-standard inch-series tapered roller bearing cup used across agricultural equipment, construction machinery, automotive axle and wheel hub assemblies, gearboxes, and industrial equipment. Verify cone part number 28580 (or equivalent) is used as the mating cone for this cup.

Replaces Part Number(s):

28521, A-28521-P-AI

Aftermarket Interchange Numbers

Timken 28521, NTN 4T-28521, NSK 28521, National 28521, Peer 28521, BR28521

New aftermarket replacement part - not remanufactured, not used.