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TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft.
Unit of Measure

Specifications

Series

 N/A 67900

Cone Part Number

 N/A 67985D

Cup Part Number

 N/A 67920

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A 67985D-90059

Dimensions

d - Bore

 N/A 8.1250 in206.375 mm

D - Cup Outer Diameter

 N/A 11.1250 in282.575 mm

B - Double Cone Width

 N/A 3.4375 in87.313 mm

C - Cup Width

 N/A 1.4375 in36.513 mm

T - Bearing Width across Cups

 N/A 3.4375 in87.313 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.03 in0.800 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 8.62 in219 mm

Db - Cup Backface Backing Diameter

 N/A 10.24 in260.10 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.11 in2.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 24700 lbf110000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 166000 lbf738000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 43000 lbf191000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 21500 lbf95800 N

Factors

K - Factor7 N/A 1.15
e - ISO Factor8 N/A 0.51
Y1 - ISO Factor9 N/A 1.33
Y2 - ISO Factor10 N/A 1.97

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 820

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 172
Cg - Geometry Factor11 N/A 0.139

Spacer

Note

 N/A Spacer shows standard nominal .01 radii, actual bearing may vary
  • 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 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 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 11 Geometry constant for Lubrication Life Adjustment Factor a3l.
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