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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TS (Tapered Single) > Tapered Roller Bearings - TS (Tapered Single) Imperial > Part Number EE129120X - 129174  
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Part Number EE129120X - 129174, Tapered Roller Bearings - TS (Tapered Single) Imperial


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.



Unit of Measure: Imperial Metric Both

Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Basic Load Ratings  · Factors

Specifications

Series
129000

Cone Part Number
EE129120X

Cup Part Number
129174

Design Unit
Inch

Cage Material
Stamped Steel


Dimensions

d - Bore
12 in
304.8 mm

D - Cup Outer Diameter
17.3208 in
439.948 mm

B - Cone Width
3.0312 in
76.992 mm

C - Cup Width
2.1250 in
53.975 mm

T - Bearing Width
3.0001 in
76.203 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.25 in
6.4 mm

r - Cup Backface "To Clear" Radius2
0.190 in
4.83 mm

da - Cone Frontface Backing Diameter
12.91 in
328 mm

db - Cone Backface Backing Diameter
13.15 in
334 mm

Da - Cup Frontface Backing Diameter
16.3 in
411.50 mm

Db - Cup Backface Backing Diameter
16.02 in
406.91 mm

Ab - Cage-Cone Frontface Clearance
-0.02 in
-0.5 mm

Aa - Cage-Cone Backface Clearance
0.56 in
14.2 mm

a - Effective Center Location3
0.29 in
7.4 mm
1 These maximum fillet radii will be cleared by the bearing corners.
2 These maximum fillet radii will be cleared by the bearing corners.
3 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
52200 lbf
232000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
201000 lbf
896000 N

C0 - Static Radial Rating
401000 lbf
1780000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
37200 lbf
165000 N
1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
3 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.


Factors

K - Factor1
1.4

e - ISO Factor2
0.42

Y - ISO Factor3
1.44

G1 - Heat Generation Factor (Roller-Raceway)
1882.6

G2 - Heat Generation Factor (Rib-Roller End)
272.9

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.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances



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