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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 M757400

Cone Part Number

 N/A M757447D

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 247000 lbf1100000 N

C0 - Static Radial Rating

 N/A 462000 lbf2050000 N

Dimensions

d - Cone Bore

 N/A 11.9940 in304.648 mm

B - Double Cone Width

 N/A 5.0625 in128.588 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 12.91 in328 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.21 in5.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 64000 lbf285000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 430000 lbf1910000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 111000 lbf496000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 51800 lbf231000 N

Factors

K - Factor7 N/A 1.24

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1840

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 253
Cg - Geometry Factor8 N/A 0.177
  • 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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