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.
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.
Screw & Barrel Ranges for Single Screw Extruder
| Screw Diameter | 15mm -300mm |
|---|---|
| Screw Length | L/D ratio 15 – 46 |
Screw Technical Specifications
| Steel Material | DIN 41CrA1Mo7 / AST M4140 |
|---|---|
| Heat Treatment | Tempered 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 tolerance | 0.015 mm/m |
| Surface roughness | Ra 0.4μm |