MITSUBISHI ELECTRIC MR-E- A/AG - Manual (Page 214)

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14. SERVO MOTOR
14.4.3 Load mounting precautions
POINT
During assembling, the shaft end must not be hammered.
Doing so can cause the encoder to fail.
(1) When mounting a pulley to the servo motor shaft provided with a keyway, use the screw hole in the
shaft end. To fit the pulley, first insert a double-end stud into the screw hole of the shaft, put a washer
against the end face of the coupling, and insert and tighten a nut to force the pulley in.
Servo motor
Double-end stud
Nut
Washer
Pulley
(2) For the servo motor shaft with a keyway, use the screw hole in the shaft end. For the shaft without a
keyway, use a friction coupling or the like.
(3) When removing the pulley, use a pulley remover to protect the shaft from impact.
(4) To ensure safety, fit a protective cover or the like on the rotary area, such as the pulley, mounted to
the shaft.
(5) When a threaded shaft end part is needed to mount a pulley on the shaft, please contact us.
(6) The orientation of the encoder on the servo motor cannot be changed.
(7) For installation of the servo motor, use spring washers, etc. and fully tighten the bolts so that they do
not become loose due to vibration.