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 KHM89443

Bore (d)

 N/A 1 5/16 in33.337 mm

Inner Ring Width (B)

 N/A 1.1250 in28.575 mm
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 24800 lbf110000 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 6440 lbf28600 N
e Factor 3 N/A 0.55
K Factor 4 N/A 1.07

Other Dimensions

Weight

 N/A 1.5 lb0.7 Kg
Effective Center Location5 N/A -0.22 in-5.6 mm
Max Shaft Fillet Radius6 N/A 0.03 in0.800 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 1.75 in44.5 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 1.83 in46.5 mm

Cage Location rel. to BF (Aa)

 N/A 0.06 in1.5 mm

Cage Location rel. to FF (Ab)

 N/A 0.08 in2 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)7 N/A 6020 lbf26800 N

Static Radial Load Rating (CO)

 N/A 26700 lbf119000 N

Factors

G1 Factor

 N/A 28.9

G2 Factor

 N/A 13.1
Geometry Factor (Cg)8 N/A 0.0883
  • 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 Negative value indicates effective center inside cone backface.
  • 6 These maximum fillet radii will be cleared by the bearing corners.
  • 7 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.
  • 8 Geometry constant for Lubrication Life Adjustment Factor a3l.