3  Specifications and Dimensional Drawings
3.3.3  SGMGH Servomotors (1500min
-1
) With Low-backlash Gears
3-24
* 1.  The maximum input motor speed of the gears is 4000 
min
-1
.
* 2.  Output torque and motor speed produce the following trends in efficiency. Values in the table are at 
the rated motor speed.
Note: 1.  For the shaft center allowable radial load, refer to the servomotor dimensional drawing.
2.  The no-load torque for a servomotor with gears is high immediately after the servomotor starts, 
and it then decreases and becomes stable a few minutes later.  This is a common phenomenon 
caused by grease being circulated in the gear and not by a faulty gear.
20AAL14
1.8
1500
11.5 
(102)
1/5
46.0/80 
(407/80)
115/80 
(1020/80)
300 600
41.9
(37.1)
10.2
(9.03)
20AAL24
1/9
82.8/80 
(733/80)
207/80 
(1830/80)
167 334
39.5
(35.0)
7.80
(6.90)
20AAL54
1/20
184/80 
(1630/80)
459/80 
(4060/80)
75 150
51.9
(45.9)
20.2
(17.9)
20AAL74
1/29
267/80 
(2360/80)
666/80 
(5900/80)
51 102
45.1
(39.9)
13.4
(11.9)
30AAL14
2.9
18.6 
(165)
1/5
74.4/80 
(659/80)
182/80 
(1610/80)
300 600
66.4
(58.8)
20.4
(18.1)
30AAL24
1/9
134/80 
(1190/80)
328/80 
(2900/80)
167 334
58.5
(51.8)
12.5
(11.1)
30AAL54
1/20
298/80 
(2640/80)
730/80 
(6460/80)
75 150
66.2
(58.6)
20.2
(17.9)
44AAL14
4.4
28.4 
(251)
1/5
114/80 
(1010/80)
284/80 
(2510/80)
300 600
87.9
(77.8)
20.4
(18.1)
44AAL24
1/9
204/80 
(1810/80)
512/80 
(4530/80)
167 334
80.0
(70.8)
12.5
(11.1)
(Cont’d)
Servomotor
Model
SGMGH-
Servomotor Gear Output
Moment of Inertia J
×10
-4
 kg·m
2
 
 
(×10
-3 
lb·in·s
2
)
Out-
put
W
Rated
Speed
min
-1
Rated
Torque
Nxm
(lbxin)
Gear 
Ratio
Rated 
Torque/
Efficiency 
∗2
N·m/% 
(lb·in/%)
Instanta-
neous 
Peak 
Torque/
Effective 
N·m/%
(lb·in/%)
Rated 
Speed 
min
-1
Max. 
Speed 
∗1
 
min
-1
 
Motor + 
Gears
Gears
Output torque
Efficiency
Efficiency
Output torque
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