Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Automatic candidate selection
One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Dimensions differ
“28580” across 2 loaded brands
The base designation is shared, but the loaded boundary dimensions do not agree. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | TIMKEN28580A / 2852050.8 × 89.98 × 24.749 mm | KOYO28580R/2150.8 × 92.075 × 25.4 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 28580A / 28520 | 28580R/21 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 28500 | — |
| Bore diameterd | 50.8 mm | 50.8 mm |
| Outside diameterD | 89.98 mm | 92.075 mm |
| WidthB | 24.749 mm | 25.4 mm |
| Basic dynamic load ratingC | 98.9 kN | 107 kN |
| Basic static load ratingC0 | 130 kN | 119 kN |
| Fatigue load limitPu | — | 17.9 kN |
| Limiting speednG | — | 4200 r/min |
| Mass≈m | 0.65 kg | 0.7 kg |
| Calculation Factors | ||
| K Factor | 1.55 | — |
| Y1 Factor | 1.59 | — |
| Y2 Factor | -1.00 | — |
| Y0 Factor | 0.87 | — |
| E Factor | 0.38 | — |
| Cg Factor | 0.0912 | — |
| Classification | ||
| Official Category Path | — | Tapered roller bearings - Single-row - Inch series |
| Official Classification 1 | — | Tapered roller bearings / Single-row / Inch series |
| Manufacturer Identity | ||
| Material Number | 100054478100050006 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 28580A / 28520 | — |
| Inner Ring Part Number | 28580A | — |
| Outer Ring Part Number | 28520 | — |
| Official Source System | TS_PREPAIR | — |
| Official Last Run | 2026-08-23T00:00:00 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 92.075 mm |
| Overall Width | 26.900 mm | — |
| T | — | 24.608 mm |
| Radial Rating | 25,700 N | — |
| B | — | 25.400 mm |
| Axial Rating | 16,600 N | — |
| C | — | 19.845 mm |
| Dynamic Rating C1 | 98,900 N | — |
| R(Min.) | — | 3.6 mm |
| Dynamic Rating C90 | 25,700 N | — |
| R1(Min.) | — | 0.8 mm |
| Dynamic Axial Rating Ca90 | 16,600 N | — |
| Basic Load Ratings : Cr | — | 107 kN |
| Dynamic Axial Rating Ca1 | 63,900 N | — |
| Basic Load Ratings : C0R | — | 119 kN |
| Static Radial Rating C0 | 130,000 N | — |
| Fatigue Load Limit : Cu | — | 17.9 kN |
| Extended Dynamic Rating Ce | 0 N | — |
| Limiting Speeds(Grease Lub.) | — | 4200 min-1 |
| Static Axial Rating C0A | 143,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 5600 min-1 |
| Load Center Spread : A | — | 19.9 mm |
| Constant :E | — | 0.38 |
| Axial Load Factors : Y1 | — | 1.59 |
| Axial Load Factors : Y0 | — | 0.87 |
| Da | — | 83.0 mm |
| Db | — | 87.0 mm |
| Ra(Max.) | — | 3.6 mm |
| Rb(Max.) | — | 0.8 mm |
| Mass(Refer.) | — | 0.7 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.