Filter
Top Products
Appendix 3 Precautions in Installing Spindle Motor
MITSUBISHI CNC
Appendix 3 - 2
Appendix 3-1 Precautions in transporting motor
(1) When you carry the motor, use the eye bolt, and do not grip the motor shaft, power line or fan case, etc.
If you grasp the motor shaft in carrying, the shaft may distort and the bearing may be damaged,
resulting in abnormal vibration or sound, or shorter bearing life.
(2) When you place the motor vertically, use a cylinder tool so that the motor weight is supported on the
load-side bracket flange attachment surface. If the weight is born by the shaft, the bearing may be
damaged.
1. When a spindle motor is driven at a high speed, slight unbalance generated on the rotor causes
increase of the whirling load on the rotor. Thus rotational vibration occurs, which may result in
abnormal sound, shorter bearing life and/or damages (fretting or flaking). Therefore, it is important
to minimize the unbalance of rotational objects including the gear, pulley, coupling, rotary joint for
coolant, etc. that are attached on the motor shaft.
2. For Mitsubishi frame-type spindle motors, we consider key-less specification as standard in order
to simplify balancing procedure of such as gear, pulley, coupling and rotary joint for coolant. We
recommend you to choose a gear, pulley and coupling that have a fully symmetric shape, and
arrange screw holes on their end faces at short and equal intervals in the circumferential direction.
We also recommend you to use a fastener such as a shaft lock element to fix those fittings to the
motor shaft.
3. Carry out balancing by suppressing the circumferential vibrations as well as by such as adding
screws to the screw holes formed on the gear, pulley and coupling for the purpose of balancing.
CAUTION
٤
Cylinder tool
OK
NG
Vertical placement of motor