This work is an experimental research into the helical rolling process whereby a billet is reduced in its diameter or formed into a stepped shaft on passing through a gorge surrounded by three rotating conical rolls. Using mainly lead billets as specimen, the effects of processing variables such as reduction, roll feed angle, cone angle, inclination angle of roll axis and front tension, etc. are
... [Show full abstract] investigated on the roll force and torque, process efficiency, maximum attainable reduction and product quality.