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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

Cone Part Number

 N/A 05070X

Bore (d)

 N/A 0.7087 in18.001 mm

Inner Ring Width (B)

 N/A 0.5662 in14.381 mm
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 5560 lbf24700 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 1440 lbf6420 N
e Factor 3 N/A 0.76
K Factor 4 N/A 1.64
Y Factor 5 N/A 1.68

Other Dimensions

Weight

 N/A 0.59 lb0.268 Kg
Effective Center Location6 N/A -0.16 in-4.1 mm
Max Shaft Fillet Radius7 N/A 0.060 in1.5 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 0.89 in22.5 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 0.98 in25 mm

Cage Location rel. to BF (Aa)

 N/A 0 in0 mm

Cage Location rel. to FF (Ab)

 N/A 0.07 in1.8 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)8 N/A 881 lbf3920 N

Static Radial Load Rating (CO)

 N/A 5720 lbf25400 N

Factors

G1 Factor

 N/A 5.8

G2 Factor

 N/A 5.5
Geometry Factor (Cg)9 N/A 0.0448
  • 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 5 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 Negative value indicates effective center inside cone backface.
  • 7 These maximum fillet radii will be cleared by the bearing corners.
  • 8 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.
  • 9 Geometry constant for Lubrication Life Adjustment Factor a3l.