The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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

Other Dimensions

Weight

 N/A 66.5 Kg146.6 lb

Inner Ring Width (B)

 N/A 5.9375 in150.813 mm
Max Shaft Fillet Radius1 N/A 0.13 in3.3 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 12.68 in322 mm

Cage Location Relative to Frontface (Ab) 

 N/A 0.2 in5.1 mm

Key Dimensions

Series

 N/A HM256800

Cone Part Number

 N/A HM256849D

Bore (d)

 N/A 11.8125 in300.038 mm
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 75600 lbf336000 N
Dynamic Radial Load Rating - 1M Revs (C1) 3 N/A 292000 lbf1300000 N
Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row) 4 N/A 132000 lbf586000 N
K Factor 5 N/A 1.73

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.

Ratings

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)6 N/A 508000 lbf2260000 N

Static Radial Load Rating (C0)

 N/A 622000 lbf2770000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 43600 lbf194000 N

Factors

G1 Factor

 N/A 2550

G2 Factor

 N/A 282
Geometry Factor (Cg)8 N/A 0.178
  • 1 These maximum fillet radii will be cleared by the bearing corners.
  • 2 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 3 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 4 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.
  • 5 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 7 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.
  • 8 Geometry constant for Lubrication Life Adjustment Factor a3l.