Fontijne Grotnes has developed an uncommon approach to metalforming as an alternative to conventional techniques and practices for forming or sizing hollow geometric shapes. Two key factors comprise our approach: the use of hollow cylindrical blanks and the subsequent forming processes to shape the blank.

Using cylindrical blanks eliminates the often costly and wasteful stamping operations of blanking, deep drawing and piercing, which can lead to expensive scrap. These blanks are formed to close tolerances, often in only one operation, by expanding, shrinking or rotary roll forming. These processes often eliminate machining and fabricating steps, saving time, material and manpower as cost reductions vital to your profitability.