Datalogic AMT58 Series Manual page 300

AMT58x-CB CANopen®
3.2 Hollow shaft encoders
3.2.1 AMT58-H15
 Mount the encoder on the motor shaft using the reducing sleeve 8
(if supplied). Avoid forcing the encoder shaft;
 fasten the fixing plate 4 to the rear of the motor using two M3
cylindrical head screws 5;
 fix the collar 3 to the encoder shaft (apply threadlocker to screw 3).
6