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Part Number 80385, Tapered Roller Bearings - Single Cones - Imperial

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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.




Specifications  · Dimensions  · Abutment and Fillet Dimensions  · Basic Load Ratings  · Factors

Specifications

Series
80300

Cone Part Number
80385

Design Units
Imperial

Cage Type
Stamped Steel

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1
244000 lbf
1090000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
63400 lbf
282000 N
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.


Dimensions

d - Cone Bore
17.0000 in
431.800 mm

B - Cone Width
1.8125 in
46.038 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.13 in
3.300 mm

da - Cone Frontface Backing Diameter
17.56 in
446 mm

db - Cone Backface Backing Diameter
17.72 in
450 mm

Ab - Cage-Cone Frontface Clearance
0.11 in
2.8 mm

Aa - Cage-Cone Backface Clearance
0.12 in
3 mm

a - Effective Center Location2
0.92 in
23.4 mm
1 These maximum fillet radii will be cleared by the bearing corners.
2 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
36400 lbf
162000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
140000 lbf
624000 N

C0 - Static Radial Rating
342000 lbf
1520000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
19000 lbf
84700 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
1.91

Cg - Geometry Factor2
0.181
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 Geometry constant for Lubrication Life Adjustment Factor a3l.



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Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances