... 4.5M-9M 3. loading: 200kg-1500k Chain style rolling door motor JD series of rolling shutter door motor JD series of ... warehouses, garages, theaters, hotels, banks, factories and other buildings, rolling shutter door’s opening and closing, with electric and manual function ... dropped to 70 ° (after about 8min). Features of rolling shutter door motor.1.good design,advance structure,large starting torque ...