Parameter: Current Type: Single-phase Maximum Load: 500KG Rotate Speed: 5.8 r/min Voltage: 220V Roted Power: 250W Rated Current: 1.7A Rated Torque: 210 N.m Size of installation bracket:480*260 Features: Our rolling door motors have ISO9001International quality system certification.It's suitable for all kinds of rolling doors.Reliable performance,stable and safe.Accurate limit,deviation less than 1.5cm.Chain-drive:It can also collocates the device to prevent the shutter from falling down when the chain rupture suddenly and jam the chain wheel.Little vibration and noise,can be replaced by tubular motor,torque,reliable performancce.Roller shutter can be controled by transmitter.