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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 LM772700

Cone Part Number

 N/A LM772749DW

Cup Part Number

 N/A LM772710

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A LM772749DW-902A2 LM772749DW-902A3 LM772749DW-902A4 LM772749DW-902A5

Dimensions

d - Bore

 N/A 19.2530 in489.026 mm

D - Cup Outer Diameter

 N/A 24.9950 in634.873 mm

B - Double Cone Width

 N/A 6.0625 in153.988 mm

C - Cup Width

 N/A 2.4375 in61.913 mm

T - Bearing Width across Cups

 N/A 6.0625 in153.988 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.13 in3.300 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 20.31 in516 mm

Db - Cup Backface Backing Diameter

 N/A 23.62 in599.95 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.19 in4.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 108000 lbf482000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 728000 lbf3240000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 189000 lbf840000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 87800 lbf390000 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 2.12

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 5450
Cg - Geometry Factor11 N/A 0.253

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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