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The Timken® Syber® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

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Analyze Bearing Performance in an Application with Timken® Syber® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

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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 775

Cone Part Number

 N/A 779D

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (1 million revolutions)1 N/A 77800 lbf346000 N

C0 - Static Radial Rating

 N/A 111000 lbf495000 N

Dimensions

d - Cone Bore

 N/A 3.8750 in98.425 mm

B - Double Cone Width

 N/A 4.0300 in102.362 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 4.41 in112 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.07 in1.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 20200 lbf89700 N
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 N/A 135000 lbf603000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 35100 lbf156000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 13300 lbf59200 N

Factors

K - Factor7 N/A 1.51

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 227

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 41.3
Cg - Geometry Factor8 N/A 0.107
  • 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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