... ton QD Double Girder Overhead crane 50 ton with hooks is mainly composed with bridge frame, crane traveling mechanism, trolley, electric ... plant for load sundry materials..vIf the bridge crane with electromagnet ,it will special used in metallury and mechanism ... / flange mounted TEFC , Sq. cage / Slip ring motors with integrated safety brakes, insulation class F, IP54 protection for hoisting, CT & LT ...