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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 420000

Cone Part Number

 N/A EE420750D

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 248000 lbf1100000 N

C0 - Static Radial Rating

 N/A 409000 lbf1820000 N

Dimensions

d - Cone Bore

 N/A 7.5 in190.5 mm

B - Double Cone Width

 N/A 6.0000 in152.400 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 8.7 in221 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.14 in3.6 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 64300 lbf286000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 432000 lbf1920000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 112000 lbf498000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 44200 lbf197000 N

Factors

K - Factor7 N/A 1.45

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1150

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 128
Cg - Geometry Factor8 N/A 0.145
  • 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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