Diameter：Ф16-Ф300
Length/Diameter Ratio：L/D=15-40
Surface WC/CO overall spray welding, can effectively improve the service life of the screw.There are gradual , saltain, wave, screen, double screen,taper,distribntary,saparating, exausting dowel,mixed smelting,double screws,three screws,more screws,granulating etc.
Diameter：Ф16-Ф300
Length/Diameter Ratio：L/D=15-40
1 Material:38crMoAIA，nitriding treatment，surface hardness。HV≥900 Surface hardness：0.5-0.8mm
2 material:Surface WC/CO overall spray welding, can effectively improve the service life of the screw.
Types of screw：
Gradual , saltain, wave, screen, double screen,taper,distribntary,saparating, exausting dowel,mixed smelting,double screws,three screws,more screws,granulating etc.
