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
“18587” 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 | TIMKEN18587 / 1852039.687 × 73.025 × 16.667 mm | KOYO18587/2039.688 × 73.025 × 17.462 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 18587 / 18520 | 18587/20 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 18500 | — |
| Bore diameterd | 39.687 mm | 39.688 mm |
| Outside diameterD | 73.025 mm | 73.025 mm |
| WidthB | 16.667 mm | 17.462 mm |
| Basic dynamic load ratingC | 50.8 kN | 57.6 kN |
| Basic static load ratingC0 | 58.1 kN | 55.8 kN |
| Fatigue load limitPu | — | 8.15 kN |
| Limiting speednG | — | 5200 r/min |
| Mass≈m | 0.3 kg | 0.3 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.67 | — |
| Y1 Factor | 1.71 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.94 | — |
| E Factor | 0.35 | — |
| Cg Factor | 0.0681 | — |
| 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 | 000000000100055144 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 18587_18520 | — |
| Inner Ring Part Number | 18587 | — |
| Outer Ring Part Number | 18520 | — |
| Drawing Number | A-19554 | — |
| Upc | 0053893455211 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.503 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 1.5625 in Bore | 2.8750 in OD | 0.6562 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 73.025 mm |
| T | — | 16.667 mm |
| B | — | 17.462 mm |
| C | — | 12.700 mm |
| Overall Width | 19.462 mm | — |
| R(Min.) | — | 0.8 mm |
| Radial Rating | 13,200 N | — |
| R1(Min.) | — | 1.6 mm |
| Axial Rating | 7,890 N | — |
| Basic Load Ratings : Cr | — | 57.6 kN |
| Dynamic Rating C1 | 50,800 N | — |
| Basic Load Ratings : C0R | — | 55.8 kN |
| Dynamic Rating C90 | 13,200 N | — |
| Fatigue Load Limit : Cu | — | 8.15 kN |
| Dynamic Axial Rating Ca90 | 7,890 N | — |
| Limiting Speeds(Grease Lub.) | — | 5200 min-1 |
| Dynamic Axial Rating Ca1 | 30,400 N | — |
| Limiting Speeds(Oil Lub.) | — | 6900 min-1 |
| Static Radial Rating C0 | 58,100 N | — |
| Load Center Spread : A | — | 14.5 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.35 |
| Static Axial Rating C0A | 59,200 N | — |
| Axial Load Factors : Y1 | — | 1.71 |
| Axial Load Factors : Y0 | — | 0.94 |
| Da | — | 66.0 mm |
| Db | — | 69.0 mm |
| Ra(Max.) | — | 0.8 mm |
| Rb(Max.) | — | 1.6 mm |
| Mass(Refer.) | — | 0.3 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.