The KOYO K28580 Roller Bearing is a precision single-row tapered roller bearing, engineered for combined radial and axial load support. Manufactured by KOYO (JTEKT), this bearing is ideal for industrial machinery, wheel hubs, axle installations, gearboxes, and other heavy-load rotating components requiring a robust tapered bearing.

Product Overview

Tapered roller bearings consist of an inner ring (cone), outer ring (cup), and tapered rollers. This geometry allows them to carry both radial loads and significant axial loads in one direction, making them excellent for high-load, directional thrust applications.

The K28580 (often used together with the matching cup part number 28521) is a single-row tapered roller bearing ideal for rugged industrial environments, automotive hubs, and axle installations where heavy loads and reliability are critical.

Key Features

• Brand: KOYO (JTEKT) — trusted global bearing manufacturer

• Model / Part Number: K28580 (also known as 28580)

• Bearing Type: Single-row tapered roller bearing

• Style: Cone (inner assembly) typically mated with 28521 cup

• Load Support: Radial + axial load capacity

• Durability: High strength chrome steel construction

• Application Flexibility: Industrial machinery, wheel hubs, gearboxes, axles

• Condition: New/OEM quality

• Origin: Standard KOYO manufacturing

Technical Specifications

How It Works & Applications

Tapered roller bearings like the K28580 are designed with conical surfaces on rollers and raceways so that the contact axis converges at a common point. This allows the bearing to support:

• Heavy radial loads

• Significant axial loads in one direction

• Combined load conditions

Common applications include:

• Industrial gearboxes, hoists, and heavy machinery shafts

• Steer and drive axles in trucks or trailers

• Wheel hubs and suspension components

• Engine driveshafts and propeller shafts

• Mining and rolling mill machinery
  (*Applications based on general tapered roller bearing usage — bearing size must be verified for each assembly.)

Related Brand Equivalent / Cross-Reference

In many catalogs and interchange lists, K28580 bearings align with the following equivalent designations:

• 28580/28521 bearing (paired cone + cup) — common designation in Koyo and global catalogs

• K28521, 28580R/28521 — alternative codes used by distribution catalogs

• Common inch series tapered bearings around 2″ × 3.625″ × 1″ size
  (*When searching for equivalents, always cross-check dimensions d x D x B and catalog references rather than just numbers.)

Installation & Fitment Notes

Before installation or ordering:

• Confirm the exact dimensions your application requires: bore (50.8 mm), outer diameter (92.075 mm), and width (24.608 mm).

• Ensure the matching cup/outer ring (28521) is present or ordered, as the K28580 part is typically the cone portion of a matched bearing set.

• Verify your shaft and housing tolerances meet the recommended taper bearing setup.

• Use proper lubrication and fitting tools for tapered bearings to maximize service life.

Fitment & Compatibility

Unlike automotive-specific bearings, the KOYO K28580 is a mechanical bearing size used in many industrial assemblies rather than tied to specific car models. It’s commonly found in:

• Wheel hubs and axle assemblies with the correct bearing dimension

• Drive and steer axle bearings

• Gearbox and transmission shaft supports

• Propeller shaft and engine drive systems

👉 For automotive fitment, you must match your vehicle’s bearing size specification (50.8 × 92.075 × 24.608 mm) or consult your OEM parts catalog — this part is not tied to a specific car chassis by default.

Important

• This is NOT an exact OEM vehicle-specific part number like hub bearings — it’s a tapered bearing size used across sectors.

• Always verify size and application requirements before ordering.