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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 8900

Cone Part Number

 N/A 8976D

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 96300 lbf428000 N

C0 - Static Radial Rating

 N/A 172000 lbf764000 N

Dimensions

d - Cone Bore

 N/A 8.0060 in203.352 mm

B - Double Cone Width

 N/A 3.2188 in81.758 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius2 N/A 0.06 in1.5 mm

da - Cone Frontface Backing Diameter

 N/A 8.58 in218 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.15 in3.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 25000 lbf111000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 168000 lbf746000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 43500 lbf193000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 18900 lbf84200 N

Factors

K - Factor7 N/A 1.32
Cg - Geometry Factor8 N/A 0.124
  • 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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