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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 33012  
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Part Number 33012, 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
33012M

Cone Part Number
X33012M

Cup Part Number
Y33012M

Design Unit
Metric

Cage Material
Stamped Steel

Related Assembly Number(s)
33012-9X025
33012-9X064
33012-9X245


Dimensions

d - Bore
60 mm
2.3622 in

D - Cup Outer Diameter
95 mm
3.7402 in

B - Cone Width
27.000 mm
1.0630 in

C - Cup Width
21.000 mm
0.8268 in

T - Bearing Width
27.000 mm
1.0630 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
69 mm
2.72 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
1.8 mm
0.07 in

a - Effective Center Location3
-7.1 mm
-0.28 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
31500 N
7090 lbf

C1 - Dynamic Radial Rating (1 million revolutions)2
122000 N
27400 lbf

C0 - Static Radial Rating
150000 N
33600 lbf

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
17700 N
3980 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
1.78

e - ISO Factor2
0.33

Y - ISO Factor3
1.83

G1 - Heat Generation Factor (Roller-Raceway)
63

G2 - Heat Generation Factor (Rib-Roller End)
31.1

Cg - Geometry Factor4
0.0964
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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