Product Description: Continuous cold rolled once spiral blade, without welding, easy to install and we can accord to the customer's requests to produce the spiral blade with arbitrary outer diameter, arbitrary diameter, arbitrary length, arbitrary pitch, arbitrary thickness and arbitrary direction. Processing range: outer diameter 35-800mm; inside diameter 12-750mm;pitch 30-800mm; thickness 1.5-8mm; and the length we can afford the products to the customer's requests. Application: the products mainly applicate to the combine harvester, corn threshing machine, feed processing machinery, screw conveyer, cement machine ( earth auger, drilling machine ), snow plough ( snow blower ) and any other machine's transmission devices.