MITSUBISHI ELECTRIC MR-E- A/AG - Manual (Page 218)

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14. SERVO MOTOR
14.4.5 Protection from oil and water
(1) Next, the servo motor is not waterproof (IP44). Do not subject the servo motor to oil and water.
Especially for the HC-KFE series, do not subject the shaft-through portion to oil.
Servo Motor Series Protection
HC-KFE IP55
Oil or water
Servo motor
(2) When the gear box is mounted horizontally, the oil level in the gear box should always be lower than
the oil seal lip on the servo motor shaft. If it is higher than the oil seal lip, oil will enter the servo
motor, leading to a fault. Also, provide a breathing hole in the gear box to hold the internal pressure
low.
The HC-KFE series servo motor is not equipped with a V ring or an oil seal and cannot be used with
the gear box as described above. Oil should be shut off on the gear box side.
Servo motor
V ring
Gear
Lip
Height above oil level h
Height above Oil Level h
Servo Motor
[mm] [in]
52 to 152 20 0.79
HC-SFE
202 to 702 25 0.98
(3) When installing the servo motor horizontally, face the power cable and encoder cable downward. When
installing the servo motor vertically or obliquely, provide a trap for the cable.
Cable trap