Technology Index:
Diameter: Φ35/35~Φ250/250 (according to the demands of customers)
L/D Ratio: L/D=1635 (according to the demands of customers)
Nitriding layer depth: 0.50.8mm
Nitriding layer hardness: 950HV
Nitriding brittleness: Grade two
Screw material: 38CrMoAlA, special alloy can be welded on the flight of screw.
Barrel material: 38CrMoAlA, imported alloy steel can be used on feeding hole .
The compression ratio of screw can be designed according to different raw materials and requirements of clients.