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 51.3 Kg113.1 lb

Inner Ring Width (B)

 N/A 5.125 in130.175 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 0.18 in4.6 mm

Key Dimensions

Series

 N/A M257100

Cone Part Number

 N/A M257148DW

Bore (d)

 N/A 12 in304.8 mm
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 69700 lbf310000 N
Dynamic Radial Load Rating - 1M Revs (C1) 3 N/A 269000 lbf1200000 N
Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row) 4 N/A 121000 lbf540000 N
K Factor 5 N/A 1.76

Ratings

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)6 N/A 468000 lbf2080000 N

Static Radial Load Rating (C0)

 N/A 477000 lbf2120000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 39700 lbf176000 N

Factors

Geometry Factor (Cg)8 N/A 0.167
  • 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.