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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

Other Dimensions

Weight

 N/A 0.4 Kg0.9 lb

C - Cup Width

 N/A 0.748 in18.999 mm
Max Housing Fillet Radius1 N/A 0.08 in2.03 mm

Housing Backing Shoulder Diameter - Frontface (Da)

 N/A 2.72 in68.1 mm

Housing Backing Shoulder Diameter - Backface (Db)

 N/A 2.6 in66.04 mm

Key Dimensions

Series

 N/A 315

Cup Part Number

 N/A 323

O.D. (D)

 N/A 2.9528 in75.001 mm
e Factor 2 N/A 0.25

Factors

Geometry Factor (Cg)3 N/A 0.0602
  • 1 These maximum fillet radii will be cleared by the bearing corners.
  • 2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 3 Geometry constant for Lubrication Life Adjustment Factor a3l.