Parallel Twin Screw and Barrel

Parallel twin screw
We can according to the customer's demand to make the parallel twin screw and barrel.
Diameter: Φ75/2,  90/2,  110/2,  120/2,  130/2, 110/2, 115/2 
L/D=18-36
The compressor ratio of the screw can be properly designed according to the different formula.

TECHNICAL SPECIFICATION
Material: 38CrMOALA
Tempering hardness: HB240~280
Nirtrized hardness: HV850~1000
Nirtrized thickness: 0.45~0.7mm
Surface roughness≤ Ra0.4
Liner strightness: 0.015mm
Surface hardness afrer Chrome coating ≥ 900HV
Chrome coating layer thickness 0.050.10mm
Bi-metallic layer hardness: HRC56~65
Bi-metallic layer thickness: 0.8~2.0mm.