Parallet twin screw and barrel

Diameter：Φ35/35~Φ250/250 

Ratio of Length to Diameter：16～35

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 .

Nitriding layer depth: 0.5～0.8mm

Nitriding layer hardness: ＞950HV

Nitriding brittleness: ＜level 2

The compression ratio of screw can be desingned according to different raw material-s and requirements of clients.