Shafts, spacers and fittings for segmented screw assemblies. Machined in our own Henan workshop — to your drawing, or reverse-engineered from your worn parts.
The shaft carries all the torque, so keyway accuracy and spline fit matter more than anything else on a segmented assembly. We machine shafts and spacers to drawing, nitrided for wear at the element seats.
Supplied individually or as part of a complete segmented screw assembly.
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 | To drawing |
|---|---|
| Keyways | Machined to tolerance, verified |
| Material | 42CrMo / 38CrMoAlA |
| Treatment | Nitrided for wear at element seats |
| Fit | To your element bore and spline |
| Supply | Individual parts or full assembly |
| Lead time | 25–35 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 |
Yes — send the shaft or detailed measurements, especially the spline and keyway dimensions.
Element seats fret against the shaft. Nitriding resists that and keeps the assembly tight.
Yes — shaft, spacers and elements assembled and checked before shipment.
Conveying, kneading and mixing elements for co-rotating twin-screw compounders.
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Modular barrel segments with bimetallic lining for compounding lines.
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Send your machine model, drawing or worn sample — we reply with a matching proposal and quotation within one business day.
