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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 LL52549 - LL52510  
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Part Number LL52549 - LL52510, 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
LL52500

Cone Part Number
LL52549

Cup Part Number
LL52510

Design Unit
Inch

Cage Material
Stamped Steel

Related Assembly Number(s)
LL52549-90010
LL52549-902A1
LL52549-903A1


Dimensions

d - Bore
0.8750 in
22.225 mm

D - Cup Outer Diameter
1.6563 in
42.070 mm

B - Cone Width
0.4400 in
11.176 mm

C - Cup Width
0.3400 in
8.636 mm

T - Bearing Width
0.4400 in
11.176 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
1 in
25.5 mm

db - Cone Backface Backing Diameter
1.08 in
27.5 mm

Da - Cup Frontface Backing Diameter
1.59 in
40.39 mm

Db - Cup Backface Backing Diameter
1.44 in
36.58 mm

Ab - Cage-Cone Frontface Clearance
0.07 in
1.8 mm

Aa - Cage-Cone Backface Clearance
-0.02 in
-0.5 mm

a - Effective Center Location3
-0.07 in
-1.8 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
966 lbf
4300 N

C1 - Dynamic Radial Rating (1 million revolutions)2
3730 lbf
16600 N

C0 - Static Radial Rating
3770 lbf
16800 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
655 lbf
2920 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

G1 - Heat Generation Factor (Roller-Raceway)
4.7

G2 - Heat Generation Factor (Rib-Roller End)
8.62

Cg - Geometry Factor4
0.0431
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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