This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
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Unit of Measure
Key Dimensions
Cone Part Number |
N/A HM88649 |
Bore (d) |
N/A 1 3/8 in34.925 mm |
Inner Ring Width (B) |
N/A 1.0000 in25.400 mm |
| Dynamic Radial Load Rating - 1M Revs (C1) 1 | N/A 17300 lbf76800 N |
| Dynamic Radial Load Rating - 90M Revs (C90) 2 | N/A 4480 lbf19900 N |
| K Factor 3 | N/A 1.07 |
Other Dimensions
Weight |
N/A 1.2 lb0.5 Kg |
| Effective Center Location4 | N/A -0.18 in-4.6 mm |
| Max Shaft Fillet Radius5 | N/A 0.09 in2.29 mm |
Shaft Backing Shoulder Diameter - Frontface (da) |
N/A 1.68 in42.5 mm |
Shaft Backing Shoulder Diameter - Backface (db) |
N/A 1.91 in48.5 mm |
Cage Location rel. to BF (Aa) |
N/A 0.04 in1 mm |
Cage Location rel. to FF (Ab) |
N/A 0.1 in2.5 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
- 4 Negative value indicates effective center inside cone backface.
- 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 Geometry constant for Lubrication Life Adjustment Factor a3l.