2 Models and External Dimensions
2 - 64
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
1 kW/1.5 kW/2 kW (with Brake)
R88M-1M1K020T-B (O/S2/OS2)/R88M-1M1K520T-B(O/S2/OS2)
R88M-1M2K020T-B(O/S2/OS2)
Note The standard shaft type is a straight shaft. Models with a key and tap are indicated with “S2” at the end of
the model number.
Models with an oil seal are indicated with “O” at the end of the model number.
Shaft-end with key and tap
Model
Dimensions [mm]
LL KB1 KB2 KL2
R88M-1M1K020T-B(O/S2/OS2) 162±2 63±1 149±2 118±2
R88M-1M1K520T-B(O/S2/OS2) 179±2 79±1 166±2 118±2
R88M-1M2K020T-B(O/S2/OS2) 201±3 99±1 189±2 119±2
Model
Dimensions [mm]
QA QK W T U QE LT
R88M-1M1K020T-B(S2/OS2) 3 42 7 M5 12
R88M-1M1K520T-B(S2/OS2) 3 42 7 M5 12
R88M-1M2K020T-B(S2/OS2) 3 42 7 M5 12
KB2
KL2
76±2
KB1
LL
11.5±0.5
110
0
-0.035 dia.
55±1
4±0.4
50±0.8
130×130±2
4-9±0.5 dia.
145±0.2 dia.
Encoder connector Motor and brake connector
0
22-0.013 dia.
R1.5 max
T
W
U
QA QK
Key and tap cross section
QE (tap)
LT (tap depth)
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