TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft.
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Unit of Measure
Key Dimensions
Cone Part Number |
N/A LM121948D |
Bore (d) |
N/A 4.25 in107.95 mm |
| Dynamic Radial Load Rating - 1M Revs (C1) 1 | N/A 37800 lbf168000 N |
| Dynamic Radial Load Rating - 90M Revs (C90) 2 | N/A 9810 lbf43600 N |
| Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row) 3 | N/A 17100 lbf75900 N |
| K Factor 4 | N/A 2.07 |
Other Dimensions
Weight |
N/A 3.6 Kg7.9 lb |
Inner Ring Width (B) |
N/A 2.5625 in65.088 mm |
| Max Shaft Fillet Radius5 | N/A 0.03 in0.800 mm |
Shaft Backing Shoulder Dia. - Frontface (da) |
N/A 4.53 in115 mm |
Cage Location rel. to FF (Ab) |
N/A -0.03 in-0.8 mm |
- 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
- 2 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
- 3 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
- 4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
- 5 These maximum fillet radii will be cleared by the bearing corners.
- 6 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
- 7 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
- 8 Geometry constant for Lubrication Life Adjustment Factor a3l.