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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

Specifications

Cup Part Number

 N/A 39521P

Design Units

 N/A Imperial

Dimensions

D - Cup Outer Diameter

 N/A 4.4375 in112.712 mm

C - Cup Width

 N/A 0.8268 in21.001 mm

Abutment and Fillet Dimensions

r - Cup Backface "To Clear" Radius1 N/A 0.06 in1.5 mm

Da - Cup Frontface Backing Diameter

 N/A 4.21 in107 mm

Factors

K - Factor2 N/A 1.72
e - ISO Factor3 N/A 0.34
  • 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
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