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Timken Part Number M12649 - M12610, 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

M12600

Cone Part Number

M12649

Cup Part Number

M12610

Design Units

Imperial

Bearing Weight

0.40 lb
0.200 Kg

Cage Type

Stamped Steel


Dimensions

d - Cone Bore

0.8437 in
21.430 mm

D - Cup Outer Diameter

1.9687 in
50.005 mm

B - Cone Width

0.7200 in
18.288 mm

C - Cup Width

0.5500 in
13.970 mm

T - Bearing Width

0.6900 in
17.526 mm

Z - Number of Rollers Per Row

14


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1

0.050 in
1.270 mm

r - Cup Backface "To Clear" Radius2

0.050 in
1.27 mm

da - Cone Frontface Backing Diameter

1.08 in
27.43 mm

db - Cone Backface Backing Diameter

1.16 in
29.46 mm

Da - Cup Frontface Backing Diameter

1.83 in
46.48 mm

Db - Cup Backface Backing Diameter

1.73 in
43.94 mm

Ab - Cage-Cone Frontface Clearance

0.07 in
1.8 mm

Aa - Cage-Cone Backface Clearance

-0.01 in
-0.3 mm

a - Effective Center Location3

-0.25 in
-6.40 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

3040 lbf
13500 N

C1 - Dynamic Radial Rating (1 million revolutions)2

11700 lbf
52200 N

C0 - Static Radial Rating

9780 lbf
43500 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3

1450 lbf
6440 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

2.1

e - ISO Factor2

0.28

Y - ISO Factor3

2.16

G1 - Heat Generation Factor (Roller-Raceway)

9.1

G2 - Heat Generation Factor (Rib-Roller End)

5.63

Cg - Geometry Factor

0.0479
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.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances

Tools and Guides for Engineers


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