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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.

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Unit of Measure

Key Dimensions

Cone Part Number

 N/A JF7049A

Bore (d)

 N/A 70 mm2.7559 in
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 325000 N73200 lbf
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 84400 N19000 lbf
K Factor 3 N/A 1.75

Other Dimensions

Weight

 N/A 2.40 Kg5.4 lb

Inner Ring Width (B)

 N/A 42.000 mm1.6535 in
Effective Center Location4 N/A -12.4 mm-0.49 in
Max Shaft Fillet Radius5 N/A 7.110 mm0.280 in

Shaft Backing Shoulder Dia. - Frontface (da)

 N/A 81 mm3.17 in

Shaft Backing Shoulder Dia. - Backface (db)

 N/A 94 mm3.7 in

Cage Location rel. to BF (Aa)

 N/A 1.5 mm0.06 in

Cage Location rel. to FF (Ab)

 N/A 4.6 mm0.18 in

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)6 N/A 48100 N10800 lbf

Static Radial Load Rating (C0)

 N/A 360000 N80800 lbf

Factors

G1 Factor

 N/A 121

G2 Factor

 N/A 24.5
Geometry Factor (Cg)7 N/A 0.0828
  • 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.