YASKAWA SGM7D Product Manual page 169

11.1 Reference Information for Servomotor Capacity Selection
2
11.1.1 GD for Simple Diagrams
11.1 Reference Information for Servomotor Capacity Selection
2
11.1.1 GD
When Rotary Shaft Is
Aligned with Center Line
of Cylinder
When Rotary Shaft Runs
Through Gravitational
Center
When Rotary Shaft Is on
One End
When Rotary Shaft Is
Outside Rotating Body
General Formula When
Rotary Shaft Is outside
Rotating Body
Information
11-2
for Simple Diagrams
Solid cylinder
2
( D =
OR
2
GD
: Density (g/cm
L : Length (m)
: Diameter (m)
D
Rectangular solid
2
D = ( b
Sphere
2
2
=
D
5
Cone
3
2
=
D
10
Rectangular solid
2
= (4
D
Rectangular solid
4
2
D =
+4(
General Formula for Diameter of Rotation When Rotary Shaft Is
Outside Rotating Body
2 2
=
D D
2 1
D : Diameter of rotation when shaft that is parallel to rotary shaft and
1
runs through center of gravity virtually operates as a rotary shaft
2
GD = Weight × (Diameter of rotation)
2
D /2 )
D
0
0
4
=125π LD
3
)...Copper: 7.866
c
b
2 2
+ c )/3
D
0
2
D
0
D
2
0
D
0
c
2 2
+ )/3 b
b C
c
2 2
b + C
b
3
2
bd + d )
d
2
+ 4 d
2
D
0
Hollow cylinder
2 2 2
( + )
D = D D /2
0 1
OR
2
4 4
=125π ( + )
GD L D D
0 1
3
:Density (g/cm )
: Length (m)
L
:Diameter (m)
D D
,
0 1
Cylindrical body
2 2 2
=
D L /3 + D /4
0
D
Hollow sphere
5 3
D D
-
2
2
0 1
D =
5 3 3
D D
-
0 1
Wheel
3
2 2 2
D = +
D D
4
0 1
Cylindrical body
2
D
4
2 2
0
D = +
L
3
4
Cylindrical body
2
D
4
2 2
0
D =
L +
3
4
2
+4( + )
dL d
d
D
1
D
0
L
0
D
1
D
0
D
1
D
0
L
D
0
L
d
Center of gravity
Rotary shaft