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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.

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Unit of Measure

Specifications

Series

N/A M12600

Cone Part Number

N/A M12649

Cup Part Number

N/A M12610

Design Units

N/A Imperial

Bearing Weight

N/A 0.200 Kg0.4 lb

Cage Type

N/A Stamped Steel

Dimensions

d - Bore

N/A 21.430 mm0.8437 in

D - Cup Outer Diameter

N/A 50.005 mm1.9687 in

B - Cone Width

N/A 18.288 mm0.7200 in

C - Cup Width

N/A 13.970 mm0.5500 in

T - Bearing Width

N/A 17.526 mm0.6900 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 1.270 mm0.050 in
r - Cup Backface "To Clear" Radius2 N/A 1.27 mm0.050 in

da - Cone Frontface Backing Diameter

N/A 27.43 mm1.08 in

db - Cone Backface Backing Diameter

N/A 29.46 mm1.16 in

Da - Cup Frontface Backing Diameter

N/A 46.48 mm1.83 in

Db - Cup Backface Backing Diameter

N/A 43.94 mm1.73 in

Ab - Cage-Cone Frontface Clearance

N/A 1.8 mm0.07 in

Aa - Cage-Cone Backface Clearance

N/A -0.3 mm-0.01 in
a - Effective Center Location3 N/A -6.4 mm-0.25 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 13500 N3040 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 52200 N11700 lbf

C0 - Static Radial Rating

N/A 43500 N9780 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 6440 N1450 lbf

Factors

K - Factor7 N/A 2.1
e - ISO Factor8 N/A 0.28
Y - ISO Factor9 N/A 2.16

G1 - Heat Generation Factor (Roller-Raceway)

N/A 9.1

G2 - Heat Generation Factor (Rib-Roller End)

N/A 5.63

Cg - Geometry Factor

N/A 0.0479
  • 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.
  • 4 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 5 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 6 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.
  • 7 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.