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.
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1
N/A975000 N219000 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
N/A253000 N56800 lbf
Dimensions
d - Cone Bore
N/A189.949 mm7.4783 in
B - Cone Width
N/A60.000 mm2.3622 in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius3
N/A3 mm0.12 in
db - Cone Backface Backing Diameter
N/A211 mm8.31 in
Ab - Cage-Cone Frontface Clearance
N/A7.4 mm0.29 in
Aa - Cage-Cone Backface Clearance
N/A-2.3 mm-0.09 in
a - Effective Center Location4
N/A-8.9 mm-0.35 in
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)5
N/A299000 N67100 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6
N/A82600 N18600 lbf
Factors
K - Factor7
N/A1.76
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.
3 These maximum fillet radii will be cleared by the bearing corners.
4 Negative value indicates effective center inside cone backface.
5 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
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.
© 2016 The Timken Company.