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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TS (Tapered Single) > Tapered Roller Bearings - TS (Tapered Single) Metric > Part Number 32012X  
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Part Number 32012X, Tapered Roller Bearings - TS (Tapered Single) Metric


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
32012XM

Cone Part Number
X32012XM

Cup Part Number
Y32012XM

Design Unit
Metric

Cage Material
Stamped Steel

Related Assembly Number(s)
32012X-9X025
32012X-9X029
32012X-9X245
32012XM-90KM2
32012XM-90KM3


Dimensions

d - Bore
60 mm
2.3622 in

D - Cup Outer Diameter
95 mm
3.7402 in

B - Cone Width
23.000 mm
0.9055 in

C - Cup Width
17.500 mm
0.6890 in

T - Bearing Width
23.000 mm
0.9055 in


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
1.520 mm
0.06 in

r - Cup Backface "To Clear" Radius2
1.52 mm
0.06 in

da - Cone Frontface Backing Diameter
66 mm
2.6 in

db - Cone Backface Backing Diameter
68 mm
2.68 in

Da - Cup Frontface Backing Diameter
91.90 mm
3.62 in

Db - Cup Backface Backing Diameter
86.11 mm
3.39 in

Ab - Cage-Cone Frontface Clearance
2.5 mm
0.1 in

Aa - Cage-Cone Backface Clearance
1.3 mm
0.05 in

a - Effective Center Location3
-1.8 mm
-0.07 in
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
29700 N
6680 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
115000 N
25800 lbf

C0 - Static Radial Rating
132000 N
29600 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
21900 N
4920 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
1.36

e - ISO Factor2
0.43

Y - ISO Factor3
1.39

G1 - Heat Generation Factor (Roller-Raceway)
51.2

G2 - Heat Generation Factor (Rib-Roller End)
31.4

Cg - Geometry Factor4
0.0982
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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