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 X31330M

Bore (d)

 N/A 150 mm5.9055 in
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 862000 N194000 lbf
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 224000 N50300 lbf
K Factor 3 N/A 0.71

Other Dimensions

Weight

 N/A 28.2 Kg62.10 lb

Inner Ring Width (B)

 N/A 75.000 mm2.9528 in
Effective Center Location4 N/A 18 mm0.71 in
Max Shaft Fillet Radius5 N/A 5.080 mm0.2 in

Shaft Backing Shoulder Dia. - Frontface (da)

 N/A 187 mm7.36 in

Shaft Backing Shoulder Dia. - Backface (db)

 N/A 210 mm8.27 in

Cage Location rel. to BF (Aa)

 N/A 18.5 mm0.73 in

Cage Location rel. to FF (Ab)

 N/A 8.9 mm0.35 in

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)6 N/A 316000 N71000 lbf

Static Radial Load Rating (C0)

 N/A 1200000 N270000 lbf

Factors

G1 Factor

 N/A 544.4

G2 Factor

 N/A 54.9
Geometry Factor (Cg)7 N/A 0.141
  • 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.