Conical screw and barrel 1.38CrMoALA(JIS SACM645) 2.42CrMo(JIS SCM440) 3.9Cr18MoV 4.CW6Mo5Cr4V2

38crmoala Conical screw and barrel

Processing Range: Diameter 35/75- 92/188mmNitrided Layer depth: 0.4mm-0.7mmHardness of Nitrided Layer: Above HV960-1040Streightness of Screw: 0.015mm/1000mmCr-Plating thickness: 0.02mm-0.20mm

These series screw and barrel,mainly used in the plastic manufacturing process,convey material,mixing. It is the most important part of the extruder. The essential  shaft of plastic pipe,profile,sheet extruding,and granule making machine.

Following main technial standards:

Item	Twin screw and barrel
L/D	25:1
Material	38CrMoAIA
Tempering hardness	240-280HV
Nitride layer thickness	0.5-0.8mm
Nitride brittleness	<= Grade 2
Surface Roughness	Ra0.4m
Screw Straightness	0.015mm
Note:The screw is via the heat treatment,nitriding treatment,high-frequency quenching,Spray-coating the bimetallic layer.

Bimetallic Conical Twin Screw and Barrel for extruders