... rollers materials are alloy steel,Hardness more than 52 The new product FD series “double vertical ring-die pellet mill”, ... and Palm fiber etc.Advantage:Gearbox:Continue the SKJ series New generation gearbox,Driving with high-precision gears,Auto-matic ... assure the pelleting quality and warranty time,Working manner is from inside to outside press,Centrifugal force and extrusion pressure together ...