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Part Number JLM820048
Part Number JLM820048, Tapered Roller Bearings - Single Cones - Metric
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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.
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Specifications
·
Dimensions
·
Abutment and Fillet Dimensions
·
Basic Load Ratings
·
Factors
Specifications
Series
LM820000
Cone Part Number
JLM820048
Design Units
METRIC
Cage Type
Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)
1
283000
N
63600
lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)
2
73300
N
16500
lbf
Full Timken Part Number
LM820000
1
Based on 1 x 10
6
revolutions L
10
life, for the ISO life calculation method.
2
Based on 90 x 10
6
revolutions L
10
life, for The Timken Company life calculation method. C
90
and C
a90
are radial and thrust values for a single-row, C
90(2)
is the two-row radial value.
Dimensions
d - Cone Bore
100
mm
3.937
in
B - Cone Width
30.000
mm
1.1811
in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
2.290
mm
0.09
in
da - Cone Frontface Backing Diameter
107
mm
4.21
in
db - Cone Backface Backing Diameter
111
mm
4.37
in
Ab - Cage-Cone Frontface Clearance
1.8
mm
0.07
in
Aa - Cage-Cone Backface Clearance
1.8
mm
0.07
in
a - Effective Center Location
2
4.6
mm
0.18
in
1
These maximum fillet radii will be cleared by the bearing corners.
2
Negative value indicates effective center inside cone backface.
Basic Load Ratings
C90 - Dynamic Radial Rating (90 million revolutions)
1
42100
N
9470
lbf
C1 - Dynamic Radial Rating (1 million revolutions)
2
162000
N
36500
lbf
C0 - Static Radial Rating
242000
N
54400
lbf
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
36200
N
8130
lbf
1
Based on 90 x 10
6
revolutions L
10
life, for The Timken Company life calculation method. C
90
and C
a90
are radial and thrust values.
2
Based on 1 x 10
6
revolutions L
10
life, for the ISO life calculation method.
3
Based on 90 x 10
6
revolutions L
10
life, for The Timken Company life calculation method. C
90
and C
a90
are radial and thrust values for a single-row, C
90(2)
is the two-row radial value.
Factors
K - Factor
1
1.16
G1 - Heat Generation Factor (Roller-Raceway)
133
G2 - Heat Generation Factor (Rib-Roller End)
38.3
Cg - Geometry Factor
2
0.141
1
These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2
Geometry constant for Lubrication Life Adjustment Factor a3l.
VIEW CAD DRAWING
·
3D
·
2D ISO View
·
2D Sales Drawing
DOWNLOADS
Tapered Roller Bearing Engineering Information
(PDF, 663KB)
Bearing Life Calculation Tool
Bearing Dimensional Tolerances
