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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 280000

Cone Part Number

 N/A EE280700D

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 136000 lbf603000 N

C0 - Static Radial Rating

 N/A 195000 lbf867000 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 7 in177.800 mm

B - Double Cone Width

 N/A 4.5000 in114.300 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 7.87 in199.9 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.08 in2 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 35100 lbf156000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 236000 lbf1050000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 61200 lbf272000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 21700 lbf96400 N

Factors

K - Factor7 N/A 1.62

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 591

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 86
Cg - Geometry Factor8 N/A 0.112
  • 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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