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 32948

Cone Part Number

 N/A X32948M

Cup Part Number

 N/A Y32948M

Design Unit

 N/A Metric

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A 32948-9X241

Dimensions

d - Bore

 N/A 240 mm9.4488 in

D - Cup Outer Diameter

 N/A 320 mm12.5984 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 mm0.12 in
r - Cup Backface "To Clear" Radius2 N/A 2.5 mm0.1 in

da - Cone Frontface Backing Diameter

 N/A 251 mm9.88 in

db - Cone Backface Backing Diameter

 N/A 258 mm10.16 in

Da - Cup Frontface Backing Diameter

 N/A 311.5 mm12.26 in

Db - Cup Backface Backing Diameter

 N/A 300 mm11.81 in

Ab - Cage-Cone Frontface Clearance

 N/A 4.3 mm0.17 in

Aa - Cage-Cone Backface Clearance

 N/A 4.1 mm0.16 in
a - Effective Center Location3 N/A 14 mm0.55 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 148000 N33300 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 571000 N128000 lbf

C0 - Static Radial Rating

 N/A 1150000 N258000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 116000 N26100 lbf

Factors

K - Factor7 N/A 1.27
e - ISO Factor8 N/A 0.46
Y - ISO Factor9 N/A 1.31

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1020.3

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 205.6
Cg - Geometry Factor10 N/A 0.145
  • 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.