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/A57700 lbf257000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
N/A15000 lbf66600 N
Dimensions
d - Cone Bore
N/A1 3/4 in44.45 mm
B - Cone Width
N/A1.1563 in29.370 mm
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius3
N/A0.14 in3.600 mm
da - Cone Frontface Backing Diameter
N/A2.24 in57 mm
db - Cone Backface Backing Diameter
N/A2.64 in67 mm
Ab - Cage-Cone Frontface Clearance
N/A0.14 in3.6 mm
Aa - Cage-Cone Backface Clearance
N/A0.03 in0.8 mm
a - Effective Center Location4
N/A-0.15 in-3.8 mm
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)5
N/A8590 lbf38200 N
C1 - Dynamic Radial Rating (1 million revolutions)6
N/A33100 lbf147000 N
C0 - Static Radial Rating
N/A35400 lbf157000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)7
N/A8030 lbf35700 N
Factors
K - Factor8
N/A1.07
Cg - Geometry Factor9
N/A0.102
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 1 x 106 revolutions L10 life, for the ISO life calculation method.
7 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.
8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
9 Geometry constant for Lubrication Life Adjustment Factor a3l.