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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 HM252300

Cone Part Number

 N/A HM252347D

Cup Part Number

 N/A HM252315

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 10.2500 in260.350 mm

D - Cup Outer Diameter

 N/A 16.9970 in431.724 mm

B - Double Cone Width

 N/A 5.5000 in139.700 mm

C - Cup Width

 N/A 2.3750 in60.325 mm

T - Bearing Width across Cups

 N/A 5.7188 in145.258 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.14 in3.600 mm
r - Cup Backface "To Clear" Radius2 N/A 0.140 in3.56 mm

da - Cone Frontface Backing Diameter

 N/A 11.22 in285 mm

Db - Cup Backface Backing Diameter

 N/A 15.63 in397.00 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.24 in6.1 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 87400 lbf389000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 587000 lbf2610000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 152000 lbf677000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 49700 lbf221000 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
Cg - Geometry Factor11 N/A 0.148

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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