Omron OMNUC FND Series User Manual page 49

Design and Installation
U-Series AC Servomotor Shaft Dimensions with Keys
(U-INC, U-ABS, 1 to 2 kW)
Standard U-series AC Servomotors do not have keys on the shafts. The shaft dimensions of motors
with keys are shown below. Motors with keys are indicated by adding "-S1" to the end of the model num-
ber. Key slots are based on JIS B1301-1976.
j 1.0-kW/1.5-kW/2.0-kW Models
Standard: R88M-U1K030 -S1, R88M-U1K530 -S1, R88M-U2K030 -S1
With Brakes: R88M-U1K030 -BS1, R88M-U1K530 -BS1, R88M-U2K030 -BS1
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Chapter 2
M8 with effective
depth of 16
2-25