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
171000 N38500 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
44400 N9990 lbf
Full Timken Part Number
L819300
Dimensions
d - Cone Bore
95 mm3.7402 in
B - Cone Width
20.000 mm0.7874 in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius3
5.080 mm0.2 in
da - Cone Frontface Backing Diameter
102 mm4.02 in
db - Cone Backface Backing Diameter
111 mm4.37 in
Ab - Cage-Cone Frontface Clearance
2 mm0.08 in
Aa - Cage-Cone Backface Clearance
2 mm0.08 in
a - Effective Center Location4
10.9 mm0.43 in
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)5
25500 N5740 lbf
C1 - Dynamic Radial Rating (1 million revolutions)6
98400 N22100 lbf
C0 - Static Radial Rating
133000 N29900 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)7
25500 N5730 lbf
Factors
K - Factor8
1
G1 - Heat Generation Factor (Roller-Raceway)
93.3
G2 - Heat Generation Factor (Rib-Roller End)
70.5
Cg - Geometry Factor9
0.13
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.