Hardened / bimetallic-coated kneading elements that survive 30–50% glass fibre duty. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
Standard nitrided kneading blocks round off in months on glass-filled PA. Our wear-protected elements use hard-faced flight crests and, where needed, a bimetallic sleeve section — keeping the kneading geometry sharp for years instead of months.
Specify your glass loading and duty hours and we quote the right protection level — hardened lands for moderate duty, full wear-protected builds for 24/7 lines.
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 | Ø20–135 mm typical |
|---|---|
| Protection | Hard-faced crests / bimetallic sleeves |
| Types | Kneading, conveying and mixing with protection |
| Service life | 3–6× nitrided on GF duty |
| Material | Wear-alloy facings on nitrided core |
| 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 |
On 30–50% glass duty, three to six times nitrided elements is our typical field experience — and the geometry stays sharp, which matters as much as life.
Yes — we build to your existing element geometry and shaft interface.
Cost and lead time — both are recovered on the first set you do not replace mid-season.
Conveying, kneading and mixing elements for co-rotating twin-screw compounders.
View Details →
Modular barrel segments with bimetallic lining for compounding lines.
View Details →
Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
