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All Product Types > ENGINEERED BEARINGS > Tapered Roller Bearings > Tapered Roller Bearings - TS (Tapered Single) > Tapered Roller Bearings - TS (Tapered Single) Imperial > Part Number LM545849V - LM545812  
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Part Number LM545849V - LM545812, Tapered Roller Bearings - TS (Tapered Single) Imperial


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.



Unit of Measure: Imperial Metric Both

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

Specifications

Series
LM545800

Cone Part Number
LM545849V

Cup Part Number
LM545812

Design Unit
Inch

Cage Material
Stamped Steel


Dimensions

d - Bore
9.25 in
234.95 mm

D - Cup Outer Diameter
12.5000 in
317.500 mm

B - Cone Width
1.9375 in
49.213 mm

C - Cup Width
1.4375 in
36.513 mm

T - Bearing Width
1.9376 in
49.215 mm


Abutment and Fillet Dimensions

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

r - Cup Backface "To Clear" Radius2
0.130 in
3.30 mm

da - Cone Frontface Backing Diameter
9.69 in
246 mm

db - Cone Backface Backing Diameter
9.92 in
252.0 mm

Da - Cup Frontface Backing Diameter
12.07 in
306.58 mm

Db - Cup Backface Backing Diameter
11.69 in
296.93 mm

Ab - Cage-Cone Frontface Clearance
0.16 in
4.1 mm

Aa - Cage-Cone Backface Clearance
0.14 in
3.6 mm

a - Effective Center Location3
0.33 in
8.4 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
38000 lbf
169000 N

C1 - Dynamic Radial Rating (1 million revolutions)2
146000 lbf
651000 N

C0 - Static Radial Rating
233000 lbf
1040000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
25800 lbf
115000 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
1.47

e - ISO Factor2
0.4

Y - ISO Factor3
1.51

Cg - Geometry Factor4
0.137
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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