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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 LM742700

Cone Part Number

 N/A LM742749DW

Cup Part Number

 N/A LM742714

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A LM742749DW-90064 LM742749DW-90073 LM742749DW-90074

Dimensions

d - Bore

 N/A 8 1/2 in215.900 mm

D - Cup Outer Diameter

 N/A 11.3750 in288.925 mm

B - Double Cone Width

 N/A 3.3750 in85.725 mm

C - Cup Width

 N/A 1.3750 in34.925 mm

T - Bearing Width across Cups

 N/A 3.3749 in85.722 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.09 in2.300 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 9.03 in229.36 mm

Db - Cup Backface Backing Diameter

 N/A 10.51 in266.95 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 25000 lbf111000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 168000 lbf748000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 43600 lbf194000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 20600 lbf91800 N

Factors

K - Factor7 N/A 1.21
e - ISO Factor8 N/A 0.48
Y1 - ISO Factor9 N/A 1.4
Y2 - ISO Factor10 N/A 2.09

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 867
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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