helical blade, spiral blade ,spiral for combine harvester，

Our company owns advanced production line of rolling helical blade for harvester, which makes us to produce any size of helical blade with different inner diameter, outer diameter, pitch, and different lengths of helical blade for harvester. The product characterizes a smooth surface, high strength,good durability and cheapness. In addition to machinable standard harvester fittings, any drawing or new specification is welcome.