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 | LM121900 | |
| Variant / construction | TDI - Tapered Double Inner | |
| Bore diameter | d | 107.95 mm |
| Outside diameter | D | 152.4 mm |
| Width | B | 65.088 mm |
| Basic dynamic load rating | C | 293 kN |
| Basic static load rating | C0 | 625 kN |
| Mass | ≈m | 3.68 kg |
| Precision class | ABMA Class 2 | |
| Sealing | Open | |
| Cage | Steel cage |
Calculation Factors6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| K Factor | 2.07 | |
| Y1 Factor | 2.39 | |
| Y2 Factor | 3.56 | |
| Y0 Factor | 2.34 | |
| E Factor | 0.28 | |
| Cg Factor | 0.1373 |
Manufacturer Identity8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Brand | Timken | |
| Material Number | 000000000190019237 | |
| World Assembly Part Number | LM121948D_LM121911 | |
| Inner Ring Part Number | LM121948D | |
| Outer Ring Part Number | LM121911 | |
| Drawing Number | B-154008 | |
| Official Source System | CORE BP - DS DF | |
| Official Last Run | 2026-08-23T20:02:47.283 |
Product Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type Description | TDI - Tapered Double Inner | |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 4.2500 in Bore | 6.0000 in OD | 2.5625 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | |
| Number Of Rows | 2 | |
| Tapered Bore | N |
Technical Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Overall Width | 0.000 mm | |
| Radial Rating | 75,900 N | |
| Axial Rating | 21,100 N | |
| Dynamic Rating C1 | 293,000 N | |
| Dynamic Rating C90 | 75,900 N | |
| Dynamic Axial Rating Ca90 | 21,100 N | |
| Dynamic Axial Rating Ca1 | 81,400 N | |
| Static Radial Rating C0 | 625,000 N | |
| Extended Dynamic Rating Ce | 0 N | |
| Static Axial Rating C0A | 257,000 N |
