3 - 73
3   Specifications
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
3-3  Decelerator Specifications
3
 For 1,500-r/min Servomotors
 
*1. The value is the allowable continuous output torque of the Decelerator. Take care so that this value is not exceeded.
Note 1. The Decelerator inertia is the Servomotor shaft conversion value.
2. The protective structure rating of the Servomotor with the Decelerator is IP44.
3. The Allowable radial load column shows the values obtained at the center of the shaft (T/2).
4. The standard shaft type is a straight shaft. A model with a key and tap is indicated with “J” at  of the model num-
ber.
5. Take care so that the surface temperature of the Decelerator does not exceed 70°C.
Servo-
motor 
rated 
output
Reduc-
tion 
ratio
Model
Rated 
rota-
tion 
speed
Rated 
torque
Effi-
ciency
Momen-
tary 
maxi-
mum 
rotation 
speed
Momen-
tary 
maxi-
mum 
torque
Decelerator 
inertia
Allow-
able 
radial 
load
Allow-
able 
thrust 
load
Weight
r/min N·m % r/min N·m
× 10
-4 
kg·m
2
N N kg
4 kW 1/5 R88G-HPG50A055K0SB
300 119.0 93.4 600 356.6 11 2347 8118 22.0
1/11 R88G-HPG50A115K0SB
136
217.9
*1
94.3 272 788.2 8.4 2974 10285 23.5
1/20 R88G-HPG65A205K0SB
75
474.9
93.1 150
1425.3
14 7338 26799 55.4
1/25 R88G-HPG65A255K0SB
60 596.0 93.5 120 1784.0 14 7846 28654 55.4
5 kW 1/5 R88G-HPG50A054K5TB
300 149.3 93.9 600 452.6 12 2347 8118 22.0
1/12 R88G-HPG65A127K5SB
125 354.1 92.8 250 1082.2 66 6295 22991 52.0
1/20 R88G-HPG65A204K5TB
75 595.9 93.7 150 1809.3 53 7338 26799 52.0
5.5 kW 1/5 R88G-HPG50A054K5TB
300 164.6 94.1 600 452.6 12 2347 8118 22.0
1/12 R88G-HPG65A127K5SB
125 391.0 93.1 250 1082.2 66 6295 22991 52.0
1/20 R88G-HPG65A204K5TB
75 657.3 93.9 150 1809.3 53 7338 26799 52.0
T
Thrust load
Center of shaft 
(T/2)
Radial load