All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Single Cups > Tapered Roller Bearings - Single Cups - Imperial > Part Number 129172  

Part Number 129172, Tapered Roller Bearings - Single Cups - Imperial

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This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.




Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Factors

Specifications

Series
129000

Cup Part Number
129172

Design Units
Imperial


Dimensions

D - Cup Outer Diameter
17.246 in
438.048 mm

C - Cup Width
2.125 in
53.975 mm


Abutment and Fillet Dimensions

r - Cup Backface "To Clear" Radius1
0.190 in
4.83 mm

Da - Cup Frontface Backing Diameter
16.3 in
411.50 mm

Db - Cup Backface Backing Diameter
15.98 in
405.89 mm
1 These maximum fillet radii will be cleared by the bearing corners.


Factors

K - Factor1
1.4

e - ISO Factor2
0.42

Y - ISO Factor3
1.44

G1 - Heat Generation Factor (Roller-Raceway)
1880

G2 - Heat Generation Factor (Rib-Roller End)
273

Cg - Geometry Factor4
0.171
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 Geometry constant for Lubrication Life Adjustment Factor a3l.



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Tapered Roller Bearing Engineering Information
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