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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 675

Cone Part Number

 N/A 688TD

Cup Part Number

 N/A 672P

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 3.9453 in100.211 mm

D - Cup Outer Diameter

 N/A 6.6250 in168.275 mm

B - Double Cone Width

 N/A 3.7500 in95.250 mm

C - Cup Width

 N/A 1.1875 in30.163 mm

T - Bearing Width across Cups

 N/A 3.7500 in95.250 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 4.45 in113 mm

Db - Cup Backface Backing Diameter

 N/A 5.87 in149.10 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.12 in3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 14600 lbf64800 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 97800 lbf435000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 25400 lbf113000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 11700 lbf52200 N

Factors

K - Factor7 N/A 1.24
e - ISO Factor8 N/A 0.47
Y1 - ISO Factor9 N/A 1.43
Y2 - ISO Factor10 N/A 2.14
Cg - Geometry Factor11 N/A 0.106

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.