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

O.D. (D)

 N/A 310 mm12.2047 in

Cup Part Number

 N/A Y30234
e Factor 1 N/A 0.44
K Factor 2 N/A 1.34
Y Factor 3 N/A 1.38

Other Dimensions

Weight

 N/A 17.1 Kg37.7 lb

C - Cup Width

 N/A 43 mm1.6929 in
Max Housing Fillet Radius4 N/A 4 mm0.16 in

Housing Backing Shoulder Dia. - Frontface (Da)

 N/A 288 mm11.34 in

Housing Backing Shoulder Dia. - Backface (Db)

 N/A 285 mm11.22 in

Factors

G1 Factor

 N/A 615.2

G2 Factor

 N/A 89.8
Geometry Factor (Cg)5 N/A 0.12
  • 1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 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.
  • 4 These maximum fillet radii will be cleared by the bearing corners.
  • 5 Geometry constant for Lubrication Life Adjustment Factor a3l.