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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 L420449 - L420410  
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Part Number L420449 - L420410, 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
L420400

Cone Part Number
L420449

Cup Part Number
L420410

Design Unit
Inch

Cage Material
Stamped Steel

Related Assembly Number(s)
L420449-90010
L420449-902A2
L420449-902A3


Dimensions

d - Bore
4 in
101.600 mm

D - Cup Outer Diameter
5.3750 in
136.525 mm

B - Cone Width
0.8438 in
21.433 mm

C - Cup Width
0.6563 in
16.670 mm

T - Bearing Width
0.8438 in
21.433 mm


Abutment and Fillet Dimensions

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

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

da - Cone Frontface Backing Diameter
4.21 in
107 mm

db - Cone Backface Backing Diameter
4.29 in
109 mm

Da - Cup Frontface Backing Diameter
5.22 in
132.59 mm

Db - Cup Backface Backing Diameter
5.04 in
128.02 mm

Ab - Cage-Cone Frontface Clearance
0.08 in
2 mm

Aa - Cage-Cone Backface Clearance
0.02 in
0.5 mm

a - Effective Center Location3
0.11 in
2.8 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
5700 lbf
25400 N

C1 - Dynamic Radial Rating (1 million revolutions)2
22000 lbf
97800 N

C0 - Static Radial Rating
39400 lbf
175000 N

Ca90 - Dynamic Thrust Rating (90 million revolutions)3
3600 lbf
16000 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
1.59

e - ISO Factor2
0.37

Y - ISO Factor3
1.63

G1 - Heat Generation Factor (Roller-Raceway)
140

G2 - Heat Generation Factor (Rib-Roller End)
102

Cg - Geometry Factor4
0.129
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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