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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

UPC

 N/A 0053893030173

Cone Part Number

 N/A 399AX

Bore (d)

 N/A 2 11/16 in68.263 mm

Inner Ring Width (B)

 N/A 1.4310 in36.347 mm
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 22200 lbf98900 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 5760 lbf25600 N
e Factor 3 N/A 0.87
K Factor 4 N/A 1.45
Y Factor 5 N/A 1.49

Note

 N/A This part has a non-standard shoulder design. Please email customer CAD for shoulder details to ensure the proper design of mating components.

Other Dimensions

Weight

 N/A 4.57 lb2.073 Kg
Effective Center Location6 N/A -0.59 in-15 mm
Max Shaft Fillet Radius7 N/A 0.09 in2.3 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 2.91 in74 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 3.07 in78 mm

Cage Location rel. to BF (Aa)

 N/A 0.61 in15.5 mm

Cage Location rel. to FF (Ab)

 N/A 0.11 in2.8 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)8 N/A 3970 lbf17600 N

Static Radial Load Rating (CO)

 N/A 28100 lbf125000 N

Factors

G1 Factor

 N/A 56

G2 Factor

 N/A 21.4
Geometry Factor (Cg)9 N/A 0.0984
  • 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.