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 | HM256800 | |
| Variant / construction | TDI - Tapered Double Inner | |
| Bore diameter | d | 300.038 mm |
| Outside diameter | D | 422.275 mm |
| Width | B | 150.812 mm |
| Basic dynamic load rating | C | 2260 kN |
| Basic static load rating | C0 | 5530 kN |
| Mass | ≈m | 69.67 kg |
| Precision class | ABMA Class 4 | |
| Sealing | Open | |
| Cage | Steel cage |
Calculation Factors6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| K Factor | 1.73 | |
| Y1 Factor | 2.00 | |
| Y2 Factor | 2.99 | |
| Y0 Factor | 1.96 | |
| E Factor | 0.34 | |
| Cg Factor | 0.1779 |
Manufacturer Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Brand | Timken | |
| Material Number | 000000000100181416 | |
| World Assembly Part Number | HM256849D_HM256810 | |
| Inner Ring Part Number | HM256849D | |
| Outer Ring Part Number | HM256810 | |
| Drawing Number | C-37442 | |
| Upc | 0053893045689 | |
| Official Source System | CORE BP - DS DF | |
| Official Last Run | 2026-08-23T20:02:47.397 |
Product Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type Description | TDI - Tapered Double Inner | |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 11.8125 in Bore | 16.6250 in OD | 5.9375 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 4 | |
| Number Of Rows | 2 | |
| Tapered Bore | N |
Technical Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Overall Width | 0.000 mm | |
| Radial Rating | 586,000 N | |
| Axial Rating | 194,000 N | |
| Dynamic Rating C1 | 2,260,000 N | |
| Dynamic Rating C90 | 586,000 N | |
| Dynamic Axial Rating Ca90 | 194,000 N | |
| Dynamic Axial Rating Ca1 | 748,000 N | |
| Static Radial Rating C0 | 5,530,000 N | |
| Extended Dynamic Rating Ce | 0 N | |
| Static Axial Rating C0A | 2,710,000 N |
