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

Cup Part Number

 N/A 425299

O.D. (D)

 N/A 29.9950 in761.873 mm

Outer Ring Width (C)

 N/A 4.0000 in101.600 mm
e Factor 1 N/A 0.44
Y Factor 2 N/A 1.36

Other Dimensions

Weight

 N/A 244.000 Kg537.90 lb
Max Housing Fillet Radius3 N/A 0.250 in6.35 mm

Housing Backing Shoulder Dia. - Frontface (Da)

 N/A 28.26 in717.80 mm

Housing Backing Shoulder Dia. - Backface (Db)

 N/A 27.40 in695.96 mm

Factors

Geometry Factor (Cg)4 N/A 0.253
  • 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 maximum fillet radii will be cleared by the bearing corners.
  • 4 Geometry constant for Lubrication Life Adjustment Factor a3l.