JQHS50Jb Air Winch is kind of manual operated air winch, adopts compressed air as power to drive air motor, and also drive drum via two-grade gearbox, so as to lift heavy cargo. The Air Winch is featured as follows: Small size, light weight, and mobility Variable speed control Flexible to forward and backward Anti-explosive function, reliable operation under inflammable and explosive environment Safe operation under wet, damp conditions High starting torque enables start with load, with anti-overload function For the abovementioned features, it is widely applied in coal and minerals mining, construction sties, the second platform of oilfield off-sea and inland and so on.