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
Print Back
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 49 Kg108.1 lb

Inner Ring Width (B)

 N/A 5.0625 in128.588 mm
Max Shaft Fillet Radius1 N/A 0.13 in3.3 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 12.8 in325 mm

Cage Location Relative to Frontface (Ab) 

 N/A 0.14 in3.6 mm

Key Dimensions

Series

 N/A M257200

Cone Part Number

 N/A M257248DW

Bore (d)

 N/A 12.0040 in304.902 mm
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 65000 lbf289000 N
Dynamic Radial Load Rating - 1M Revs (C1) 3 N/A 251000 lbf1120000 N
Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row) 4 N/A 113000 lbf504000 N
K Factor 5 N/A 1.83

Ratings

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)6 N/A 437000 lbf1940000 N

Static Radial Load Rating (C0)

 N/A 481000 lbf2140000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 35500 lbf158000 N

Factors

Geometry Factor (Cg)8 N/A 0.169
  • 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.