... used on gantry crane,tower crane Function of electric motor cable reel : DJ1D type constant tension cable ... on gantry crane,tower crane,and bridge type lifter and the other mobile devices.Structure:1, Tension ... ,then cable is released,at this time,the motor of cable drum go on working,skid institutions ... power-supply wiring for cable reel drum's motor.Maintaining:1,The constant tension cable reel drive ...