1. Resistance between insulated metals in a cold state motor can be larger than 1MΩ measured by a 500V insulation resistance

1. Surface treatment of a motor can suffice the corrosion resistance
2. The noise of motor is less than 60DB, when the distance between motor and noise tester is 30cm, and the background noise is less than 40DB
3. Screw rod can be moved in the output threaded hole of the motor
4. The rated load is more than 30kg
5. Endurance test can be passed 20000cycles within 50cm stroke