A-28580-I-AI Cone, Tapered Roller Bearing

One New Aftermarket Replacement Cone, Tapered Roller Bearing - Part 28580

This tapered roller bearing cone (inner ring assembly) is a single-row, imperial-series replacement bearing designed to handle both radial and axial loads. It is typically mounted in opposing pairs on a shaft and pairs with a matching cup (outer ring, sold separately) to form a complete tapered roller bearing assembly. The 28580 is a widely used ABMA standard inch-series cone suited for demanding applications in agricultural equipment, construction machinery, trailer axles, gearboxes, and drivetrain systems including differential pinion shafts and rear axle housings.

Specifications

• Part Number: 28580
• Type: Tapered Roller Bearing Cone (Inner Ring Assembly), Single Row
• Bore (Inner Diameter): 2.000 in (50.8 mm)
• Cone Width: 1.000 in (25.4 mm)
• Fillet Radius: 0.14 in
• Cage Material: Steel
• Operating Temperature Range: -65 to +250 degrees F
• Series: 28500
• Cup (Outer Ring): Sold separately - compatible cups include 28521 and 28523

Compatible Applications

Agricultural Equipment: Axles, drive shafts, rollers, and pulleys for tractors, harvesters, and planters

Construction Equipment: Axle and drivetrain assemblies for excavators and loaders

Trailer Axles: Inner bearing for #99 spindle applications (10,000 lb hubs)

Industrial: Gearboxes, conveyors, and differential pinion shaft supports

Replaces Part Number(s):

28580, A-28580-I-AI, 28580-A

Aftermarket Interchange Numbers

RIV 023050 (cross-references to Timken 28580 per Timken interchange guide)

New aftermarket replacement part - not remanufactured, not used.