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 X30210UM

Bore (d)

 N/A 50 mm1.9685 in
Dynamic Radial Load Rating - 90M Revs (C90) 1 N/A 22300 N5010 lbf
K Factor 2 N/A 1.39

Other Dimensions

Inner Ring Width (B)

 N/A 20.000 mm0.7874 in
Effective Center Location3 N/A -2 mm-0.08 in
Max Shaft Fillet Radius4 N/A 1.5 mm0.06 in

Shaft Backing Shoulder Dia. - Backface (db)

 N/A 60 mm2.36 in

Cage Location rel. to BF (Aa)

 N/A 4.1 mm0.16 in

Cage Location rel. to FF (Ab)

 N/A 0 mm0 in

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)5 N/A 16000 N3600 lbf
  • 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 Negative value indicates effective center inside cone backface.
  • 4 These maximum fillet radii will be cleared by the bearing corners.
  • 5 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.