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Screw barrel assembly

The China screw barrel assembly is the heart of your machinery. At EJS, we combine three decades of manufacturing expertise with state-of-the-art alloy technology to deliver components that withstand extreme wear and corrosion. Whether you are processing PVC, engineering plastics, or recycled materials, our customized designs ensure optimal melt quality and longevity.

Why Choose EJS?


30 Years of Expertise: Since 1992, we have specialized in high-end screw and barrel solutions.


Quality First: We use top-tier base steels including 38CrMoAlA (1.8509), 42CrMo, and SKD61.


Global Reach: Serving happy customers from Europe and America to Asia and the Middle East.


Precision Engineering: On-site measurement services and customized design support.

Technical Specifications: Bimetallic Solutions

For critical environments, our bimetallic screw barrel assembly offers superior resistance compared to standard nitrided versions.

1. Bimetallic Barrels (Alloy Options)


Alloy Type Components Hardness Temp. Range
EJS01 Fe+Ni+Cr+B HRC 58-65 ≤400°C
EJS02 Ni+Cr+Co+B HRC 50-58 ≤450°C
EJS03 Ni+Cr+Co+V+B HRC 55-60 ≤450°C
EJS04 Ni+Wc+Cr+B HRC 55-65 ≤600°C



2. Bimetallic Screws (Hardfacing)

We utilize plasma spray coating to ensure your screw barrel assembly maintains peak performance even with glass fiber reinforcement.

Ni60: Ideal for general wear and high corrosion resistance.


Colmonoy 56/83: Premium alloys for high-wear applications (up to 35% Tungsten Carbide).


Base Steels: 1.8550, 1.8519, D2, and Hastelloy available.


Comprehensive Product Range

EJS provides a full spectrum of components to keep your production lines running:

Single Screw & Barrel

Twin Parallel/Conical Screw Barrels

Injection Molding Screw Barrels

Rubber & Silicone Screw Barrels

Extruder Parts: Gearboxes, Dies, Flanges, and Nozzles



 The EJS Quality Difference

At EJS, we believe that quality is not just the hardness of the steel, but the clarity of our communication and the reliability of our support.

Inspection & Packaging

Every screw barrel assembly undergoes a rigorous quality check. We provide:


Full Inspection Report: Ensuring all dimensions and tolerances are met.


Material Certificate: Guaranteeing the authenticity of the steel and alloys used.


Pro-Shield Packaging: Robust wooden crates designed for both protection and easy unpacking upon arrival.




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