3.2 Specifications and Ratings
3.2.2 Ratings
3-8
SGM7D-
I and -
J
*1.
The rated torques are the continuous allowable torque values at a surrounding air temperature of 40˚C with an
aluminum heat sink of the dimensions given in the table.
*2.
If you use an SGD7S-120A008 SERVOPACK and SGM7D Servomotor together, use the ratios given on the bot-
tom line.
*3.
The thrust loads and moment loads that are applied while a Servomotor is operating are roughly classified into
the following patterns. Design the machine so that the thrust loads or moment loads will not exceed the values
given in the table.
The allowable load is for a static load in one direction.
When designing the system, multiply the allowable load by the following safety coefficient depending on the
type of load.
•
Smooth load with no shock: 1/3
•
Light repetitive load: 1/5
•
Shock load: 1/10
Voltage
200 V
SGM7D-
28I
70I
1ZI
1CI
2BI
2DI
06J
09J
18J
20J
38J
Rated Output
W
264
440
628
817
691
754
75
113
226
251
358
Rated Torque
*1
N
m
28.0
70.0
100
130
220
240
6.00
9.00
18.0
20.0
38.0
Instantaneous
Maximum Torque
N
m
50.0
100
150
200
300
400
8.00
15.0
30.0
45.0
60.0
Stall Torque
N
m
28.0
70.0
100
130
220
240
6.00
9.00
18.0
20.0
38.0
Rated Current
Arms
5.2
5.6
5.5
5.0
5.6
4.8
4.0
3.4
3.0
2.2
3.1
Instantaneous
Maximum Current
Arms
14.1
10.6
Rated Motor Speed
min
-1
90
60
30
120
90
Maximum Motor Speed min
-1
108
72
60
48
144
Torque Constant
N
m/
Arms
6.90
13.9
20.8
27.8
41.5
54.4
1.71
3.29
6.62
9.88
13.3
Motor Moment of
Inertia
×
10
-4
kg
m
2
1800 2000 2300 2850 3400 4000
150
210
240
260
330
Rated Power Rate
kW/s
4.36
24.5
43.5
59.3
142
144
2.40
3.86
13.5
15.4
43.8
Rated Angular
Acceleration Rate
rad/s
2
156
350
435
456
647
600
400
429
750
769
1150
Heat Sink Size
mm
550
×
550
×
30
Allowable Load Moment of Iner-
tia (Motor Moment of Inertia
Ratio)
50
times
125
times
*2
100
times
250
times
*2
90
times
230
times
*2
80
times
200
times
*2
100
times
150
times
350
times
700
times
*2
250
times
600
times
*2
240
times
550
times
*2
220
times
550
times
*2
180
times
450
times
*2
With External Regenera-
tive Resistor and
Dynamic Brake Resistor
800
times
2,000
times
2,500
times
3,000
times
100
times
150
times
700
times
900
times
2,500
times
2,000 times
Allow-
able
Loads
*3
Allowable
Thrust
Load
For
w
ar
d
N
4
×
10
4
3
×
10
4
Reverse
N
2
×
10
4
1
×
10
4
Allowable
Moment Load
N
m
400
200
Rigidi-
ties
Thrust Dis-
placement
Rigidity
Fo
rwar
d
mm/N
2
×
10
-6
3
×
10
-6
Reverse
mm/N
3
×
10
-6
4
×
10
-6
Moment Dis-
placement
Rigidity
rad/N
m
4
×
10
-7
2
×
10
-6
