Hardfaced single screw matched to an alloy-lined barrel. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
A bimetallic barrel deserves a screw built to the same standard. Flight lands are hardfaced, the root is left tough, and the whole screw is machined to the clearance your alloy bore actually measures.
Supplied up to Ø300 mm, for injection and extrusion machines.
Quote within one business day. We reply with a matching proposal, delivery date and price — no generic catalogue PDF.
Standard range shown. Every dimension below can be changed to your machine, resin and output — custom manufacturing is our daily business.
| Diameter | Up to Ø300 mm |
|---|---|
| Flight treatment | Hardfaced lands |
| Root | Tough core, not through-hardened |
| Material | 38CrMoAlA / 42CrMo |
| Clearance | Matched to the alloy bore |
| Application | Filled, recycled, corrosive |
| Lead time | 30–45 days |
The honest answer depends on your resin, not on price. Here is how we advise customers.
| Gas Nitrided (38CrMoAlA) | Bimetallic Alloy Lining | |
|---|---|---|
| Best for | Unfilled PE, PP, PS, ABS, virgin PVC | Glass-filled, mineral-filled, recycled, corrosive |
| Surface hardness | HV 900–1020, depth 0.45–0.7 mm | Alloy layer 2–5 mm, metallurgically bonded |
| Typical service life | Baseline | 3–5× baseline on abrasive resin |
| Cost | Lower | Higher, recovered through fewer stoppages |
| Certification | MTC with heat number | MTC + hardness records, third-party on request |
Hardfacing the flight lands puts the wear resistance where the wear happens while keeping the root tough enough to take torque.
Yes, but the pairing is designed for an alloy bore. Tell us your barrel type and we set clearance accordingly.
Ø300 mm in-house, same as our barrels.
Alloy-lined barrel bore for recycled, filled and corrosive materials.
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Custom flanged barrel for extrusion and injection machines.
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Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
