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 783

Bore (d)

 N/A 3.937 in100 mm

Inner Ring Width (B)

 N/A 1.8900 in48.006 mm
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 77800 lbf346000 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 20200 lbf89700 N
K Factor 3 N/A 1.51

Other Dimensions

Weight

 N/A 24.08 lb10.923 Kg
Effective Center Location4 N/A -0.32 in-8.1 mm
Max Shaft Fillet Radius5 N/A 0.14 in3.600 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 4.37 in111 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 4.65 in118 mm

Cage Location rel. to BF (Aa)

 N/A 0.13 in3.3 mm

Cage Location rel. to FF (Ab)

 N/A 0.07 in1.8 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)6 N/A 13300 lbf59200 N

Static Radial Load Rating (CO)

 N/A 111000 lbf495000 N

Factors

G1 Factor

 N/A 227.3

G2 Factor

 N/A 41.3
Geometry Factor (Cg)7 N/A 0.107
  • 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.