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Part Number X32009X, Tapered Roller Bearings - Single Cones - Metric

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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  · Basic Load Ratings  · Factors

Specifications

Series
32009X

Cone Part Number
X32009X

Design Units
METRIC

Cage Type
Stamped Steel

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1
137000 N
30800 lbf

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
35500 N
7990 lbf

Full Timken Part Number
32009X
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
2 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.


Dimensions

d - Cone Bore
45 mm
1.7717 in

B - Cone Width
20.000 mm
0.7874 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
1.020 mm
0.040 in

da - Cone Frontface Backing Diameter
51 mm
2.01 in

db - Cone Backface Backing Diameter
53 mm
2.09 in

Ab - Cage-Cone Frontface Clearance
2.5 mm
0.1 in

Aa - Cage-Cone Backface Clearance
0.3 mm
0.01 in

a - Effective Center Location2
-3.3 mm
-0.13 in
1 These maximum fillet radii will be cleared by the bearing corners.
2 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
20400 N
4590 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
78700 N
17700 lbf

C0 - Static Radial Rating
84300 N
19000 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
13700 N
3080 lbf
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
1.49

G1 - Heat Generation Factor (Roller-Raceway)
28.7

G2 - Heat Generation Factor (Rib-Roller End)
16.2

Cg - Geometry Factor2
0.0788
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 Geometry constant for Lubrication Life Adjustment Factor a3l.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances