SBR-II capacity can form up to 10mm x 160mm mild strips into spiral blades /screws. min inner diameter 20mm, Max out diameter 800mm. The machine is also suitable for stainless steel spiral blades/screw forming. the max thickness of SS. strip will be less according to tensile strength and elongation of SS strip material. the finished blades is widely used for agriculture conveyor. check detail to contact sales@wxjq-machinery.com.