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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

Series

 N/A 32315M

Cone Part Number

 N/A X32315M

Design Units

 N/A METRIC

Cage Type

 N/A Stamped Steel

Full Timken Part Number

 N/A 32315

Dimensions

d - Cone Bore

 N/A 75 mm2.9528 in

B - Cone Width

 N/A 55 mm2.1654 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 3.050 mm0.12 in

da - Cone Frontface Backing Diameter

 N/A 93 mm3.66 in

db - Cone Backface Backing Diameter

 N/A 97 mm3.82 in

Ab - Cage-Cone Frontface Clearance

 N/A 1.5 mm0.06 in

Aa - Cage-Cone Backface Clearance

 N/A 6.6 mm0.26 in
a - Effective Center Location2 N/A -17.3 mm-0.68 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 92600 N20800 lbf
C1 - Dynamic Radial Rating (1 million revolutions)4 N/A 357000 N80300 lbf

C0 - Static Radial Rating

 N/A 421000 N94600 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)5 N/A 54700 N12300 lbf

Factors

K - Factor6 N/A 1.69

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 145.2

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 26.7
Cg - Geometry Factor7 N/A 0.0831
  • 1 These maximum fillet radii will be cleared by the bearing corners.
  • 2 Negative value indicates effective center inside cone backface.
  • 3 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 4 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 5 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.
  • 6 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 7 Geometry constant for Lubrication Life Adjustment Factor a3l.
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