Menu
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
Request Information Add to CAD Cart
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 M272700

Cone Part Number

 N/A M272749DW

Design Units

 N/A Imperial

Cage Type

 N/A Pin-Type
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 839000 lbf3730000 N

C0 - Static Radial Rating

 N/A 1660000 lbf7400000 N

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 - Cone Bore

 N/A 18.8750 in479.425 mm

B - Double Cone Width

 N/A 9.3750 in238.125 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 20.08 in510 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.41 in10.4 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 218000 lbf968000 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 1460000 lbf6500000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 379000 lbf1680000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 124000 lbf551000 N

Factors

K - Factor7 N/A 1.76

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 8110

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 508
Cg - Geometry Factor8 N/A 0.26
  • 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.
By clicking Submit, you consent to the personal information you provide being used in the manner as described in our Privacy Notice, including access to that information by Timken personnel who may be located outside your home country. In addition, you agree that the CAD drawings are for your personal, one-time use only, and that you will not modify or create any compilation or derivative work using the CAD drawings or distribute or display the CAD drawings on any website or other media.