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 285.8 Kg630.1 lb

Inner Ring Width (B)

 N/A 9.0625 in230.188 mm
Max Shaft Fillet Radius1 N/A 0.25 in6.4 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 24.25 in616 mm

Cage Location Relative to Frontface (Ab) 

 N/A 0.31 in7.9 mm

Key Dimensions

Series

 N/A LM278800

Cone Part Number

 N/A LM278848D

Bore (d)

 N/A 23.0625 in585.788 mm
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 192000 lbf853000 N
Dynamic Radial Load Rating - 1M Revs (C1) 3 N/A 740000 lbf3290000 N
Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row) 4 N/A 334000 lbf1490000 N
K Factor 5 N/A 1.76

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 1290000 lbf5730000 N

Static Radial Load Rating (C0)

 N/A 1860000 lbf8280000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 109000 lbf486000 N

Factors

G1 Factor

 N/A 11600

G2 Factor

 N/A 784
Geometry Factor (Cg)8 N/A 0.291
  • 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.