Barrier Screw & Barrel
Product Descriptions

Our Barrier Screw & Barrel is expertly engineered for optimal performance in complex plastic processing applications. This advanced design ensures enhanced material melting, superior mixing, and increased homogenisation, resulting in consistent and high-quality output. By incorporating a barrier flight, our screws effectively separate unmelted and melted material streams, promoting better thermal control and improving energy efficiency.

Crafted from high-grade EN41B, H13, and D2 and treated with the tempering hardness and gas nitriding process, our barrier screws offer excellent wear and corrosion resistance. This makes them particularly well-suited for applications where performance and durability are critical. The enhanced durability ensures long-lasting use, even in high-pressure and high-temperature environments.

Available in customisable sizes, SMEW’s Barrier Screw & Barrel range is ideal for improving efficiency in extrusion and injection moulding, especially in processing materials with high melting points or complex flow properties.

Product Diameter Range Material Name/No. Process Technicle Perameter Material Type Wear Resistance Ability Corossion Resistance Ability
Barrier Screw 25 mm to 250 mm 1.8509 (EN41B) Gas Nitriding - Nitriding Hardness: 60 - 65 HRC
- Nitriding Layer Depth: 0.4 - 0.6mm
PE / PP / PVC / PET / ABS / PA / PS / PC Good Good
Barrier Screw 25 mm to 250 mm 1.2344 (Tool Steel Material) Fully Hardened - Hardness: 60 - 65 HRC ≤ 25 % Glass Fiber, PP, PA, PC, Talc Filled, PP, PEEK, PVC Excellent Good
Barrier Screw 25 mm to 250 mm 1.2344 (Tool Steel Material) Fully Hardened + Coatings (If Required) - Hardness: 55 - 60
- Coating Hardness: 65 - 70 HRC
≤ 35 % Glass Fiber, PP, PA, PC, Talc Filled, PP, PEEK, PVC Premium Excellent