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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 M249700

Cone Part Number

 N/A M249748D

Cup Part Number

 N/A M249710

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A M249748D-90045 M249748D-90093 M249748D-90099 M249748D-90114 M249748D-90119 M249748D-90131 M249748D-90133 M249748D-90134 M249748D-90167 M249748D-902B1 M249748D-902B5 M249748D-902B6 M249748D-902E8 M249748D-903A1 M249748D-903A2 M249748D-903B3

Dimensions

d - Bore

 N/A 10 in254 mm

D - Cup Outer Diameter

 N/A 14.1250 in358.775 mm

B - Double Cone Width

 N/A 5.1250 in130.175 mm

C - Cup Width

 N/A 2.1250 in53.975 mm

T - Bearing Width across Cups

 N/A 5.1249 in130.172 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 10.73 in272.46 mm

Db - Cup Backface Backing Diameter

 N/A 13.19 in335.03 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.17 in4.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 53300 lbf237000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 358000 lbf1590000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 92800 lbf413000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 30300 lbf135000 N

Factors

K - Factor7 N/A 1.76
e - ISO Factor8 N/A 0.33
Y1 - ISO Factor9 N/A 2.03
Y2 - ISO Factor10 N/A 3.02

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1630

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 168
Cg - Geometry Factor11 N/A 0.153

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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