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

Bore (d)

 N/A 4.1250 in104.775 mm

Inner Ring Width (B)

 N/A 2.0625 in52.3875 mm
Dynamic Radial Load Rating - 90M Revs (C90) 1 N/A 20200 lbf89700 N
e Factor 2 N/A 0.39
K Factor 3 N/A 1.51

Other Dimensions

Effective Center Location4 N/A -0.32 in-8.1 mm
Max Shaft Fillet Radius5 N/A 0.14 in3.5 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 4.8 in122 mm

Cage Location rel. to BF (Aa)

 N/A 0.20625 in5.23875 mm

Cage Location rel. to FF (Ab)

 N/A -0.103125 in-2.619375 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)6 N/A 13300 lbf59200 N
  • 1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 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.