All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Single Cones > Tapered Roller Bearings - Single Cones - Imperial > Part Number NA539  

Part Number NA539, Tapered Roller Bearings - Single Cones - Imperial

    Download PDF Download PDF   
    border="0" Printable Page  
    Email Email This Page  
    Save To Favorites Save To Favorites
  

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
67400 lbf
300000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
17500 lbf
77700 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
2.1250 in
53.975 mm

B - Cone Width
1.5625 in
39.6875 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.14 in
3.5 mm

db - Cone Backface Backing Diameter
2.68 in
68 mm

Ab - Cage-Cone Frontface Clearance
-0.078125 in
-1.984375 mm

Aa - Cage-Cone Backface Clearance
0.15625 in
3.96875 mm

a - Effective Center Location2
-0.48 in
-12.2 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
10000 lbf
44600 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)2
5090 lbf
22700 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
1.97
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances