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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 HM259000

Cone Part Number

 N/A HM259049D

Design Units

 N/A Imperial

Cage Type

 N/A Pin-Type
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 377000 lbf1680000 N

C0 - Static Radial Rating

 N/A 706000 lbf3140000 N

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.

Dimensions

d - Cone Bore

 N/A 12.5000 in317.500 mm

B - Double Cone Width

 N/A 6.2500 in158.750 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius2 N/A 0.13 in3.300 mm

da - Cone Frontface Backing Diameter

 N/A 13.39 in340 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.21 in5.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 97800 lbf435000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 656000 lbf2920000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 170000 lbf757000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 56000 lbf249000 N

Factors

K - Factor7 N/A 1.74

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 2940

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 304
Cg - Geometry Factor8 N/A 0.186
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 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 Geometry constant for Lubrication Life Adjustment Factor a3l.
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