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 | HM125900 | |
| Variant / construction | TS - Tapered Single | |
| Bore diameter | d | 123.825 mm |
| Outside diameter | D | 204.775 mm |
| Width | B | 55.562 mm |
| Basic dynamic load rating | C | 446 kN |
| Basic static load rating | C0 | 691 kN |
| Mass | ≈m | 7.1 kg |
| Precision class | ABMA Class 8 | |
| Sealing | Open | |
| Cage | Steel cage |
Calculation Factors6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| K Factor | 1.92 | |
| Y1 Factor | 1.97 | |
| Y2 Factor | 0.00 | |
| Y0 Factor | 1.08 | |
| E Factor | 0.30 | |
| Cg Factor | 0.1148 |
Manufacturer Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Brand | Timken | |
| Material Number | 000000000100016590 | |
| World Assembly Part Number | HM125948_HM125910 | |
| Inner Ring Part Number | HM125948 | |
| Outer Ring Part Number | HM125910 | |
| Drawing Number | B-38342 | |
| Upc | 0053893985312 | |
| Official Source System | CORE BP - DS DF | |
| Official Last Run | 2026-08-23T20:02:47.29 |
Product Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type Description | TS - Tapered Single | |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 4.8750 in Bore | 8.0620 in OD | 2.1875 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 8 | |
| Number Of Rows | 1 | |
| Tapered Bore | N |
Technical Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Overall Width | 63.125 mm | |
| Radial Rating | 116,000 N | |
| Axial Rating | 60,300 N | |
| Dynamic Rating C1 | 446,000 N | |
| Dynamic Rating C90 | 116,000 N | |
| Dynamic Axial Rating Ca90 | 60,300 N | |
| Dynamic Axial Rating Ca1 | 232,000 N | |
| Static Radial Rating C0 | 691,000 N | |
| Extended Dynamic Rating Ce | 0 N | |
| Static Axial Rating C0A | 613,000 N |
