We can supply most kinds of screw-flight & auger shaft. We can manufacture them according to your drawings or samples. We can supply the screw-flight with the follong dimension: Inner diameter: ≥8mm Outer diameter: ≤800mm Thickness: 3 to 20mm Anylength, any pitch and both rotating directions We have three manufacturing process according to the size of screw-flight: 1) Continued cold rolling when it has 3-5mm thickness, inner Dia. ≥20MM, outer Dia. ≤800MM. 2) Continued twisting when it has 3-20 thickness, inner Dia. ≥8MM, outer Dia. ≤2MM. 3)Stamping and extending which adapted for any product but need making specified mold These materials, which can below-carbon, manganese and stainless steel, can meet the requirements of customers from different way. We have been involved industries such as agricultural harvesting, foodstuff, grain, chemical, civil architecture and drilling for feeding powdered, granular and bulk materials We can manufacture various sizes of helican blades under the specifications.