Montage of Timken Bearing Products
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
Request Information Add to CAD Cart
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 32940M

Cone Part Number

 N/A X32940M

Cup Part Number

 N/A Y32940M

Design Unit

 N/A Metric

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A 32940M-90KM1

Dimensions

d - Bore

 N/A 200 mm7.874 in

D - Cup Outer Diameter

 N/A 280 mm11.0236 in

B - Cone Width

 N/A 51 mm2.0079 in

C - Cup Width

 N/A 39 mm1.5354 in

T - Bearing Width

 N/A 51 mm2.0079 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 3.050 mm0.12 in
r - Cup Backface "To Clear" Radius2 N/A 2.54 mm0.1 in

da - Cone Frontface Backing Diameter

 N/A 213 mm8.39 in

db - Cone Backface Backing Diameter

 N/A 217 mm8.54 in

Da - Cup Frontface Backing Diameter

 N/A 273.05 mm10.75 in

Db - Cup Backface Backing Diameter

 N/A 261.87 mm10.31 in

Ab - Cage-Cone Frontface Clearance

 N/A 3.3 mm0.13 in

Aa - Cage-Cone Backface Clearance

 N/A 3.3 mm0.13 in
a - Effective Center Location3 N/A 3 mm0.12 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 145000 N32700 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 561000 N126000 lbf

C0 - Static Radial Rating

 N/A 1050000 N235000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 98300 N22100 lbf

Factors

K - Factor7 N/A 1.48
e - ISO Factor8 N/A 0.39
Y - ISO Factor9 N/A 1.52

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 843.3

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 220.2
Cg - Geometry Factor10 N/A 0.13
  • 1 These maximum fillet radii will be cleared by the bearing corners.
  • 2 These maximum fillet radii will be cleared by the bearing corners.
  • 3 Negative value indicates effective center inside cone backface.
  • 4 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 5 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 6 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.
  • 7 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 10 Geometry constant for Lubrication Life Adjustment Factor a3l.