Only a single rope grab is suitable for all kinds of crane hoisting drum (single hook), the opening and closing institution novel, the open and close freely, when loading and unloading the machine suitable for demolition convenient, suitable for underwater land operation, crawl, turn the heap. Note: this grab cannot fit in the air.

Single rope grab working principle: the open and close of single rope is mainly elastic element, slide frame, locking hook, etc. Grasp way, open to grab on the material, wire rope continues to fall the carriage fell, as a result of the action of sliding shelves spring, make the claws deduction on the hook, the driver lifting beam under carriage make up, jaw closure. Discharge, the loaded bucket was sent to dumping place to dump or ground, wire rope continue to fall, the carriage in a distance, hook mouth pressure immediately lose of claws, pressure under the action of the spring on the head, PAWS spin off the hook, the driver lifting again, next beams under the action of dead weight and material make the jaw opening gradually.