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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 L507949 - L507910  
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Part Number L507949 - L507910, 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
L507900

Cone Part Number
L507949

Cup Part Number
L507910

Design Unit
Inch

Cage Material
Stamped Steel

Related Assembly Number(s)
L507949-90012
L507949-90404


Dimensions

d - Bore
2 1/4 in
57.150 mm

D - Cup Outer Diameter
3.4375 in
87.313 mm

B - Cone Width
0.7188 in
18.258 mm

C - Cup Width
0.5625 in
14.288 mm

T - Bearing Width
0.7188 in
18.258 mm


Abutment and Fillet Dimensions

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

r - Cup Backface "To Clear" Radius2
0.06 in
1.52 mm

da - Cone Frontface Backing Diameter
2.44 in
62 mm

db - Cone Backface Backing Diameter
2.56 in
65 mm

Da - Cup Frontface Backing Diameter
3.29 in
83.10 mm

Db - Cup Backface Backing Diameter
3.11 in
78.99 mm

Ab - Cage-Cone Frontface Clearance
0.1 in
2.5 mm

Aa - Cage-Cone Backface Clearance
0 in
0 mm

a - Effective Center Location3
-0.03 in
-0.8 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
3650 lbf
16300 N

C1 - Dynamic Radial Rating (1 million revolutions)2
14100 lbf
62700 N

C0 - Static Radial Rating
21500 lbf
95600 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
2430 lbf
10800 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
1.5

e - ISO Factor2
0.39

Y - ISO Factor3
1.54

G1 - Heat Generation Factor (Roller-Raceway)
46.1

G2 - Heat Generation Factor (Rib-Roller End)
38.5

Cg - Geometry Factor4
0.0914
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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