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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 LM247700

Cone Part Number

 N/A LM247748D

Cup Part Number

 N/A LM247710

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A LM247748D-902A7

Dimensions

d - Bore

 N/A 9.6250 in244.475 mm

D - Cup Outer Diameter

 N/A 12.875 in327.025 mm

B - Double Cone Width

 N/A 3.6250 in92.075 mm

C - Cup Width

 N/A 1.5000 in38.100 mm

T - Bearing Width across Cups

 N/A 3.6250 in92.075 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.06 in1.5 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 10.12 in257 mm

Db - Cup Backface Backing Diameter

 N/A 12.2 in309.90 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.16 in4.1 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 33000 lbf147000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 222000 lbf987000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 57500 lbf256000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 18200 lbf80800 N

Factors

K - Factor7 N/A 1.82
e - ISO Factor8 N/A 0.32
Y1 - ISO Factor9 N/A 2.1
Y2 - ISO Factor10 N/A 3.13

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1170
Cg - Geometry Factor11 N/A 0.135

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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