... -plase,chain-device,Max load is 600kg,AC motor, M600D-6 roller shutter drive motorName:Chain-device Series Roller Shutter MotorContent:1 ... and safet3. Location accuracy less than 1.5 centimeter4. Chain drive: could lock chain wheel to prevent the door slipping when ... , small vibration, low noise, can be used to replace tubular motor, torque, reliable performance6. Roller shutter door may be opened and ...