Single Screw and Barrel

Harden Industries’ extruder single screw and cylinders focus on extrusion process with carefully choosing the design (barrier, maddock, spiral, and mixing pins) and material of construction to match a very broad range of applications. Carbide hardening of screw flights and chrome coating of screws are also available.

single screw extruder

Harden’s single screws and barrels provid long lasting life for both the screws and barrel. We have been supplying single screws to many of the major extruder manufacturers in China and our products have been used around the world as a good alternative of low cost replacement parts.

Single Screws

 Screw & Barrel Ranges for Single Screw Extruder

Screw Diameter15mm -300mm
 Screw LengthL/D ratio 15 – 46

 Screw Technical Specifications

Steel MaterialDIN 41CrA1Mo7 / AST M4140
Heat TreatmentTempered and nitride, nitride depth: 0.5 mm – 0.7
    Surface hardness:HV900 – HV1, 000
    Chromate plating:Thickness 0.05 mm – 0.10 mm, hardness HV950
    Special treatment:Carbide coating (screw flight) and bimetallic barrel
Screw straight tolerance0.015 mm/m
Surface roughnessRa 0.4μm