... Delivery on time 4.used on gantry crane,tower crane Function of electric motor cable reel : DJ1D type constant tension ... cable reel drum are usually used on gantry crane,tower crane,and bridge type lifter and the other mobile ... then cable is released,at this time,the motor of cable drum go on working,skid ... power-supply wiring for cable reel drum's motor.Maintaining:1,The constant tension cable reel ...