... crane Function of electric motor cable reel : DJ1D type constant tension cable reel drum are mainly used on ... also can extending life of the cable. DJ1D type cable reel drum is very simple,stable and ... used on gantry crane,tower crane,and bridge type lifter and the other mobile devices.Structure:1, ... is very good.3, Lock performance.Our machine have worm gear with good lock performance,when the power is ...