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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 M667900

Cone Part Number

 N/A M667946DW

Cup Part Number

 N/A M667910

Design Unit

 N/A Inch

Cage Material

 N/A Pin-Type

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 - Bore

 N/A 16.1250 in409.575 mm

D - Cup Outer Diameter

 N/A 21.5000 in546.1 mm

B - Double Cone Width

 N/A 6.3750 in161.925 mm

C - Cup Width

 N/A 2.6250 in66.675 mm

T - Bearing Width across Cups

 N/A 6.3749 in161.922 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.200 in5.1 mm
r - Cup Backface "To Clear" Radius2 N/A 0.250 in6.35 mm

da - Cone Frontface Backing Diameter

 N/A 16.87 in428.5 mm

Db - Cup Backface Backing Diameter

 N/A 20.08 in510.03 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.19 in4.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 N/A 109000 lbf484000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 731000 lbf3250000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 190000 lbf843000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 77800 lbf346000 N

Factors

K - Factor7 N/A 1.4
e - ISO Factor8 N/A 0.42
Y1 - ISO Factor9 N/A 1.62
Y2 - ISO Factor10 N/A 2.41
Cg - Geometry Factor11 N/A 0.232

Spacer

Note

 N/A Spacer shows standard nominal .01 radii, actual bearing may vary
  • 1 These maximum fillet radii will be cleared by the bearing corners.
  • 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 10 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 11 Geometry constant for Lubrication Life Adjustment Factor a3l.
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