Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | 25800 | |
| Variant / construction | TS - Tapered Single | |
| Bore diameter | d | 34.925 mm |
| Outside diameter | D | 73.025 mm |
| Width | B | 23.813 mm |
| Basic dynamic load rating | C | 85.1 kN |
| Basic static load rating | C0 | 97.4 kN |
| Mass | ≈m | 0.47 kg |
| Precision class | ABMA Class 2 | |
| Sealing | Open | |
| Cage | Steel cage |
Calculation Factors6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| K Factor | 2.01 | |
| Y1 Factor | 2.07 | |
| Y2 Factor | 0.00 | |
| Y0 Factor | 1.14 | |
| E Factor | 0.29 | |
| Cg Factor | 0.0695 |
Manufacturer Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Brand | Timken | |
| Material Number | 000000000190033597 | |
| World Assembly Part Number | NP903590_NP640324 | |
| Inner Ring Part Number | NP903590 | |
| Outer Ring Part Number | NP640324 | |
| Drawing Number | A-55857 | |
| Upc | 0085706029555 | |
| Official Source System | CORE BP - DS DF | |
| Official Last Run | 2026-08-23T20:02:47.27 |
Product Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type Description | TS - Tapered Single | |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 1.3750 in Bore | 2.8750 in OD | 0.9375 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | |
| Number Of Rows | 1 | |
| Tapered Bore | N |
Technical Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Overall Width | 27.408 mm | |
| Radial Rating | 22,100 N | |
| Axial Rating | 11,000 N | |
| Dynamic Rating C1 | 85,100 N | |
| Dynamic Rating C90 | 22,100 N | |
| Dynamic Axial Rating Ca90 | 11,000 N | |
| Dynamic Axial Rating Ca1 | 42,300 N | |
| Static Radial Rating C0 | 97,400 N | |
| Extended Dynamic Rating Ce | 0 N | |
| Static Axial Rating C0A | 82,400 N |