Bimetallic barrel and hardened screw package for 30–50% glass-filled PA6 / PA66. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Thirty percent glass fibre will grind a nitrided barrel oval within a year. For glass-filled PA we supply a matched wear package: bimetallic barrel with a 2–5 mm centrifugal alloy lining, plus a screw with hardened flight lands and a corrosion-resistant check valve.
Typical service life on 33% GF PA66 is three to five times that of a nitrided set. Tell us the glass loading and annual tonnage and we will quote the right alloy — over-specifying costs you money, under-specifying costs you downtime.
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.
| Screw diameter | Ø30–150 mm |
|---|---|
| Barrel lining | 2–5 mm centrifugal bimetallic alloy |
| Flight lands | Hardened / Stellite-welded option |
| Non-return valve | Wear-resistant, corrosion-protected |
| Expected life | 3–5× nitrided on 33% GF PA |
| Certificates | MTC with heat number, hardness report |
| 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 |
If you run it full-time, yes — the payback is usually under a year compared with replacing nitrided barrels. For occasional short runs, a hardened nitrided set can be the more economical choice; we will say so honestly.
Yes. The barrel is only half the wear pair — we harden the flight lands and supply a wear-resistant check valve so the whole set ages evenly.
Every set ships with an MTC listing the alloy heat number, lining thickness and hardness readings; third-party inspection can be arranged.
Complete matched set for 90–450 t injection moulding machines, nitrided or bimetallic.
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High-compression PET screw with barrier tips, low acetaldehyde generation for bottle-grade preforms.
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Centrifugally cast 2–5 mm alloy lining for glass-filled and corrosive resins.
View Details →Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
