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| Parameter | TIMKEN25880 / NP64032436.487 × 73.025 × 23.813 mm | KOYO25880R/2136.487 × 73.025 × 24.608 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 25880 / NP640324 | 25880R/21 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 25800 | — |
| Bore diameterd | 36.487 mm | 36.487 mm |
| Outside diameterD | 73.025 mm | 73.025 mm |
| WidthB | 23.813 mm | 24.608 mm |
| Basic dynamic load ratingC | 85.1 kN | 90.1 kN |
| Basic static load ratingC0 | 97.4 kN | 87.3 kN |
| Fatigue load limitPu | — | 13.1 kN |
| Limiting speednG | — | 5600 r/min |
| Mass≈m | 0.45 kg | 0.459 kg |
| Calculation Factors | ||
| K Factor | 2.01 | — |
| Y1 Factor | 2.07 | — |
| Y2 Factor | -1.00 | — |
| Y0 Factor | 1.14 | — |
| E Factor | 0.29 | — |
| Cg Factor | 0.0695 | — |
| 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 | 100049611100130145 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 25880 / NP640324 | — |
| Inner Ring Part Number | 25880 | — |
| Outer Ring Part Number | NP640324 | — |
| 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 | — | 73.025 mm |
| Overall Width | 26.908 mm | — |
| T | — | 23.812 mm |
| Radial Rating | 22,100 N | — |
| B | — | 24.608 mm |
| Axial Rating | 11,000 N | — |
| C | — | 19.050 mm |
| Dynamic Rating C1 | 85,100 N | — |
| R(Min.) | — | 1.6 mm |
| Dynamic Rating C90 | 22,100 N | — |
| R1(Min.) | — | 0.8 mm |
| Dynamic Axial Rating Ca90 | 11,000 N | — |
| Basic Load Ratings : Cr | — | 90.1 kN |
| Dynamic Axial Rating Ca1 | 42,300 N | — |
| Basic Load Ratings : C0R | — | 87.3 kN |
| Static Radial Rating C0 | 97,400 N | — |
| Fatigue Load Limit : Cu | — | 13.1 kN |
| Extended Dynamic Rating Ce | 0 N | — |
| Limiting Speeds(Grease Lub.) | — | 5600 min-1 |
| Static Axial Rating C0A | 82,400 N | — |
| Limiting Speeds(Oil Lub.) | — | 7400 min-1 |
| Load Center Spread : A | — | 15.8 mm |
| Constant :E | — | 0.29 |
| Axial Load Factors : Y1 | — | 2.07 |
| Axial Load Factors : Y0 | — | 1.14 |
| Da | — | 65.0 mm |
| Db | — | 68.0 mm |
| Ra(Max.) | — | 1.6 mm |
| Rb(Max.) | — | 0.8 mm |
| Mass(Refer.) | — | 0.459 kg |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.