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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 475

Cone Part Number

 N/A 487TD

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 30500 lbf135000 N

C0 - Static Radial Rating

 N/A 41900 lbf186000 N

Dimensions

d - Cone Bore

 N/A 2.8375 in72.073 mm

B - Double Cone Width

 N/A 2.6590 in67.539 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 3.15 in80 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.12 in3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 7890 lbf35100 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 53000 lbf236000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 13700 lbf61100 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 5200 lbf23100 N

Factors

K - Factor7 N/A 1.52
Cg - Geometry Factor8 N/A 0.108
  • 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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