All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Single Cones > Tapered Roller Bearings - Single Cones - Imperial > Part Number HH421246C  

Part Number HH421246C, 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

Cone Part Number
HH421246C

Design Units
Imperial

Cage Type
Stamped Steel

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1
246000 lbf
1090000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
63800 lbf
284000 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
3.8750 in
98.425 mm

B - Cone Width
2.5 in
63.5 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.25 in
6.35 mm

da - Cone Frontface Backing Diameter
4.53 in
115.1 mm

db - Cone Backface Backing Diameter
5 in
127 mm

Ab - Cage-Cone Frontface Clearance
0.15 in
3.8 mm

Aa - Cage-Cone Backface Clearance
0.1 in
2.5 mm

a - Effective Center Location2
-0.66 in
-16.8 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
36600 lbf
163000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
141000 lbf
628000 N

C0 - Static Radial Rating
174000 lbf
772000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
23500 lbf
104000 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
1.56

G1 - Heat Generation Factor (Roller-Raceway)
298.2

G2 - Heat Generation Factor (Rib-Roller End)
40.9

Cg - Geometry Factor2
0.116
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.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances