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.
Unit of Measure

Key Dimensions

Cup Part Number

 N/A L289410

O.D. (D)

 N/A 75.3887 in1914.873 mm

Outer Ring Width (C)

 N/A 9.2520 in235.001 mm
e Factor 1 N/A 0.7
K Factor 2 N/A 1.76

Other Dimensions

Max Housing Fillet Radius3 N/A 0.510 in13.00 mm

Housing Backing Shoulder Dia. - Backface (Db)

 N/A 71.46 in1815.10 mm
  • 1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 3 These maximum fillet radii will be cleared by the bearing corners.