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 verified
“28985” across 2 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | TIMKEN28985 / 2892160.325 × 100 × 25.4 mm | KOYO28985/2160.325 × 100 × 25.4 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 28985 / 28921 | 28985/21 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 28900 | — |
| Bore diameterd | 60.325 mm | 60.325 mm |
| Outside diameterD | 100 mm | 100 mm |
| WidthB | 25.4 mm | 25.4 mm |
| Basic dynamic load ratingC | 106 kN | 115 kN |
| Basic static load ratingC0 | 149 kN | 137 kN |
| Fatigue load limitPu | — | 20.6 kN |
| Limiting speednG | — | 3700 r/min |
| Mass≈m | 0.75 kg | 0.763 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.37 | — |
| Y1 Factor | 1.41 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.78 | — |
| E Factor | 0.43 | — |
| Cg Factor | 0.1032 | — |
| 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 | 000000000100157377 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 28985_28921 | — |
| Inner Ring Part Number | 28985 | — |
| Outer Ring Part Number | 28921 | — |
| Drawing Number | A-30465 | — |
| Upc | 0053893655147 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.15 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 2.3750 in Bore | 3.9370 in OD | 1.0000 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 100.000 mm |
| T | — | 25.400 mm |
| B | — | 25.400 mm |
| C | — | 19.845 mm |
| Overall Width | 29.000 mm | — |
| R(Min.) | — | 3.6 mm |
| Radial Rating | 27,500 N | — |
| R1(Min.) | — | 3.2 mm |
| Axial Rating | 20,000 N | — |
| Basic Load Ratings : Cr | — | 115 kN |
| Dynamic Rating C1 | 106,000 N | — |
| Basic Load Ratings : C0R | — | 137 kN |
| Dynamic Rating C90 | 27,500 N | — |
| Fatigue Load Limit : Cu | — | 20.6 kN |
| Dynamic Axial Rating Ca90 | 20,000 N | — |
| Limiting Speeds(Grease Lub.) | — | 3700 min-1 |
| Dynamic Axial Rating Ca1 | 77,200 N | — |
| Limiting Speeds(Oil Lub.) | — | 4900 min-1 |
| Static Radial Rating C0 | 149,000 N | — |
| Load Center Spread : A | — | 22.8 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.43 |
| Static Axial Rating C0A | 185,000 N | — |
| Axial Load Factors : Y1 | — | 1.41 |
| Axial Load Factors : Y0 | — | 0.78 |
| Da | — | 89.0 mm |
| Db | — | 96.0 mm |
| Ra(Max.) | — | 3.6 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 0.763 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.