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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 LM258600

Cone Part Number

 N/A LM258649D

Cup Part Number

 N/A LM258610

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Note

 N/A This part has a non-standard shoulder design. Please email customer CAD for shoulder details to ensure the proper design of mating components.

Related Assembly Number(s)

 N/A LM258649D-90014 LM258649D-90018 LM258649D-90029

Dimensions

d - Bore

 N/A 12.5000 in317.500 mm

D - Cup Outer Diameter

 N/A 16.6250 in422.275 mm

B - Double Cone Width

 N/A 5.0625 in128.588 mm

C - Cup Width

 N/A 2.1250 in53.975 mm

T - Bearing Width across Cups

 N/A 5.0625 in128.588 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 13.12 in333.25 mm

Db - Cup Backface Backing Diameter

 N/A 15.67 in398.00 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.14 in3.6 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 57500 lbf256000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 386000 lbf1720000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 100000 lbf445000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 31400 lbf140000 N

Factors

K - Factor7 N/A 1.83
e - ISO Factor8 N/A 0.32
Y1 - ISO Factor9 N/A 2.11
Y2 - ISO Factor10 N/A 3.15
Cg - Geometry Factor11 N/A 0.174

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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