All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TS (Tapered Single) > Tapered Roller Bearings - TS (Tapered Single) Imperial > Part Number LM11949 - LM11919  

Part Number LM11949 - LM11919, Tapered Roller Bearings - TS (Tapered Single) 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

Series
LM11900

Cone Part Number
LM11949

Cup Part Number
LM11919

Design Unit
Inch

Cage Material
Stamped Steel


Dimensions

d - Bore
3/4 in
19.05 mm

D - Cup Outer Diameter
2.0787 in
52.799 mm

B - Cone Width
0.6550 in
16.637 mm

C - Cup Width
0.5750 in
14.605 mm

T - Bearing Width
0.71 in
18.034 mm


Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1
0.050 in
1.270 mm

r - Cup Backface "To Clear" Radius2
0.050 in
1.27 mm

da - Cone Frontface Backing Diameter
0.93 in
23.5 mm

db - Cone Backface Backing Diameter
0.98 in
25 mm

Da - Cup Frontface Backing Diameter
1.81 in
45.97 mm

Db - Cup Backface Backing Diameter
1.65 in
41.91 mm

Ab - Cage-Cone Frontface Clearance
0.05 in
1.3 mm

Aa - Cage-Cone Backface Clearance
-0.01 in
-0.3 mm

a - Effective Center Location3
-0.22 in
-5.6 mm
1 These maximum fillet radii will be cleared by the bearing corners.
2 These maximum fillet radii will be cleared by the bearing corners.
3 Negative value indicates effective center inside cone backface.


Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)1
2280 lbf
10100 N

C1 - Dynamic Radial Rating (1 million revolutions)2
8800 lbf
39100 N

C0 - Static Radial Rating
7200 lbf
32000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
1170 lbf
5220 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
1.94

e - ISO Factor2
0.3

Y - ISO Factor3
2

G1 - Heat Generation Factor (Roller-Raceway)
6.6

G2 - Heat Generation Factor (Rib-Roller End)
5.49

Cg - Geometry Factor4
0.0441
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
4 Geometry constant for Lubrication Life Adjustment Factor a3l.



 DOWNLOADS 

Tapered Roller Bearing Engineering Information
(PDF, 663KB)

Bearing Life Calculation Tool

Bearing Dimensional Tolerances



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