All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Single Cones > Tapered Roller Bearings - Single Cones - Imperial > Part Number NA366  

Part Number NA366, 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

Design Units

Imperial

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1

39900 lbf
177000
N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2

10300 lbf
46000
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

1.9685 in
50
mm

B - Cone Width

0.98445 in
25.005
mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1

0.14 in
3.5
mm

db - Cone Backface Backing Diameter

2.4 in
61
mm

Ab - Cage-Cone Frontface Clearance

-0.0492225 in
-1.25025
mm

Aa - Cage-Cone Backface Clearance

0.098445 in
2.5005
mm

a - Effective Center Location2

-0.17 in
-4.3
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

5930 lbf
26400
N

Ca90 - Dynamic Thrust Rating (90 million revolutions)2

3250 lbf
14400
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 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

1.83
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.



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Tapered Roller Bearing Engineering Information
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Bearing Life Calculation Tool

Bearing Dimensional Tolerances