All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Single Cones > Tapered Roller Bearings - Single Cones - Imperial > Part Number LM772748  

Part Number LM772748, 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

Series
LM772700

Cone Part Number
LM772748

Design Units
Imperial

Cage Type
Stamped Steel

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1
728000 lbf
3240000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2
189000 lbf
840000 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
19.2500 in
488.950 mm

B - Cone Width
3.3125 in
84.138 mm


Abutment and Fillet Dimensions

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

da - Cone Frontface Backing Diameter
20.08 in
510 mm

db - Cone Backface Backing Diameter
20.55 in
522 mm

Ab - Cage-Cone Frontface Clearance
0.19 in
4.8 mm

Aa - Cage-Cone Backface Clearance
0.35 in
8.9 mm

a - Effective Center Location2
1.61 in
40.9 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
108000 lbf
482000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
418000 lbf
1860000 N

C0 - Static Radial Rating
871000 lbf
3870000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
87800 lbf
390000 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
1.24

G1 - Heat Generation Factor (Roller-Raceway)
5450

G2 - Heat Generation Factor (Rib-Roller End)
602

Cg - Geometry Factor2
0.253
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