All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - Double Cones > Tapered Roller Bearings - Double Tapered Cones - Imperial > Part Number LM247748D  

Part Number LM247748D, Tapered Roller Bearings - Double Tapered Cones - Imperial

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

TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft.




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

Specifications

Series
LM247700

Cone Part Number
LM247748D

Design Units
Imperial

Cage Type
Stamped Steel

C1 - Dynamic Radial Rating (1 million revolutions)1
127000 lbf
567000 N

C0 - Static Radial Rating
257000 lbf
1140000 N
1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.


Dimensions

d - Cone Bore
9.6250 in
244.475 mm

B - Double Cone Width
3.6250 in
92.075 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.06 in
1.5 mm

da - Cone Frontface Backing Diameter
10.12 in
257 mm

Ab - Cage-Cone Frontface Clearance
0.16 in
4.1 mm
1 These maximum fillet radii will be cleared by the bearing corners.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
33000 lbf
147000 N

C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2
222000 lbf
987000 N

C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3
57500 lbf
256000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)4
18200 lbf
80800 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.
4 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
1.82

G1 - Heat Generation Factor (Roller-Raceway)
1170

Cg - Geometry Factor2
0.135
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 

Bearing Life Calculation Tool

Bearing Dimensional Tolerances