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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 375

Cone Part Number

 N/A 378DE

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 19800 lbf87900 N

C0 - Static Radial Rating

 N/A 22700 lbf101000 N

Dimensions

d - Cone Bore

 N/A 1 15/16 in49.213 mm

B - Double Cone Width

 N/A 2.0940 in53.188 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius2 N/A 0.03 in0.800 mm

da - Cone Frontface Backing Diameter

 N/A 2.2 in56 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.09 in2.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 5120 lbf22800 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 34400 lbf153000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 8920 lbf39700 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 2970 lbf13200 N

Factors

K - Factor7 N/A 1.73
Cg - Geometry Factor8 N/A 0.0816
  • 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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