Conical Twin Screws for PVC Extruders

Harden Industries’ Conical Twin Screws and cylinder focus is on providing high surface area and low shear screw designs that will optimize the homogeneity of the melt, maximize the productivity of the extruder, and provide long lasting life for screw and barrel. Carbide coating hardening of screw flights is also available.

Harden ‘s counter rotating Conical Twin Screws for PVC extruders have good quality and price. We have been supplying conical twin screws to many of the major twin screw extruder manufacturers in China and our products have been used around the world as a good alternative of low cost replacement parts.

conical twin-screw and barrel screw and barrelparallel Twin Screw

Ranges for Conical Twin Screws

Screw Diameter  (smaller end) 35mm -92mm

Conical Twin Screws Technical Specifications

Steel Material DIN 41CrA1Mo7 / AST M4140/ GB 38CrMoAlA, 9Cr18MoV
Heat Treatment Tempered and nitride, nitride depth: 0.7 mm – 0.9
Surface hardness: HV900 – HV1, 000
Special treatment: Carbide coating (screw flight) and bimetallic barrel
Screw straight tolerance 0.015 mm/m
Surface roughness Ra 0.4μm


New replacement screws and barrels from China for lower cost than refurbished ones. Try it and believe it, with satisfactory quality and cost saving for your production need.


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