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Part Number JM207049A
Part Number JM207049A, 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
M207000
Cone Part Number
JM207049A
Design Units
METRIC
Cage Type
Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)
1
227000
N
51100
lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)
2
58900
N
13200
lbf
Full Timken Part Number
M207000
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
55
mm
2.1654
in
B - Cone Width
29.000
mm
1.1417
in
Abutment and Fillet Dimensions
R - Cone Backface "To Clear" Radius
1
6.100
mm
0.24
in
da - Cone Frontface Backing Diameter
62
mm
2.44
in
db - Cone Backface Backing Diameter
73
mm
2.87
in
Ab - Cage-Cone Frontface Clearance
3
mm
0.12
in
Aa - Cage-Cone Backface Clearance
0.8
mm
0.03
in
a - Effective Center Location
2
-7.6
mm
-0.3
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
33800
N
7610
lbf
C1 - Dynamic Radial Rating (1 million revolutions)
2
131000
N
29300
lbf
C0 - Static Radial Rating
168000
N
37700
lbf
C
a90
- Dynamic Thrust Rating (90 million revolutions)
3
19400
N
4360
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
1.74
G1 - Heat Generation Factor (Roller-Raceway)
56.4
G2 - Heat Generation Factor (Rib-Roller End)
19.9
Cg - Geometry Factor
2
0.0937
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
