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Part Number 98789D, Tapered Roller Bearings - Double Tapered Cup - Imperial

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The configuration of the TDO provides a wide effective bearing spread, making it ideal for applications in which overturning moments are a significant load component. TDO bearings can be used in fixed positions or allowed to float in the housing bore.




Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Factors

Specifications

Series
98000

Cup Part Number
98789D

Design Units
Imperial


Dimensions

D - Cup Outer Diameter
7.875 in
200.025 mm

C - Double Cup Width
3.1581 in
80.216 mm


Abutment and Fillet Dimensions

r - Cup Backface "To Clear" Radius1
0.090 in
2.3 mm

Da - Cup Frontface Backing Diameter
7.41 in
188.21 mm
1 These maximum fillet radii will be cleared by the bearing corners.


Factors

K - Factor1
0.92

e - ISO Factor2
0.63

Y1 - ISO Factor3
1.07

Y2 - ISO Factor4
1.59

G1 - Heat Generation Factor (Roller-Raceway)
203

G2 - Heat Generation Factor (Rib-Roller End)
37.4

Cg - Geometry Factor5
0.12
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
5 Geometry constant for Lubrication Life Adjustment Factor a3l.



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