Send us your worn screw, a drawing, or just your machine model. We measure it, send you the drawing for your approval, and only cut steel after you sign off.
Ø20–【250】mm · up to 【6,000】mm long · 【60-90】 day lead time · nitrided, bimetallic, or tungsten carbide
[Get a quote on WhatsApp] [Send photos of your old screw]
Why buyers ask whether we are a real extruder screw manufacturer
Because most websites selling screws are not factories. We understand why you searched for a manufacturer rather than a supplier, so here is what sits behind our door in Zhangjiagang China:
| What we run | Quantity | Capability |
| Deep-hole drilling machines | 3 | Bores up to 500mm long |
| CNC lathes and thread milling centres | 20 | Ø20–250mm |
| Nitriding furnaces | 1 | 1 tonnes per batch |
| PTA / spray welding stations | 2 | Bimetallic layers 1.5–2.5mm |
| Straightening presses | 2 | Runout held to 0.02mm/m |
| Hardness testers, metallographic microscope | 6 | In-house, every batch |
Workshop area 2000 m². 60 people. Founded 2017 year. We ship to more then 10 countries, with our largest markets in Thailand, Germany USA, India, Turkey, Egypt, Vietnam, Mexico.
You are welcome to video-call the workshop before you order. Most of our customers do this once, and never ask again.
How We Make Sure a Replacement Extruder Screw Actually Fits
This is the risk that stops most first orders. A screw is long, heavy, and expensive to ship — if it arrives and does not fit, nobody wins. So we take the fit risk off your side of the table:
You send us what you have. A worn screw, an old drawing, or photographs plus your machine model and screw diameter. Any one of these is enough to start.
We measure it. Reverse-engineering on a coordinate measuring machine, including flight geometry, pitch, root diameter, keyway or spline, and the coupling end.
We send you the drawing. You compare it against your machine and confirm every critical dimension in writing.
Only then do we cut steel. Nothing goes into production before your approval.
If you have your machine’s original drawing, step two takes a day. If you are sending a worn screw, allow 20-40 days for shipping plus 60-90 days for measurement.
We have built replacements for screws originally supplied by Krauss Maffei, Battenfeld-Cincinnati, Milacron, Leistritz, Bausano, JWELL, CPM, JSW , BUSS Corpersion and others. If your machine is not on that list, send the nameplate photo and we will tell you honestly whether we have done one before.
Extruder Screw Specifications: Nitrided vs Bimetallic vs Carbide
The right surface is not the hardest one — it is the one matched to what you actually run. Overspecifying wastes money; underspecifying costs you a screw.
| Specification | Surface hardness | Best for | Typical service life |
| Nitrided 38CrMoAlA | HV 900–1000 | Virgin PP, PE, PS, low-filler compounds | 1 years |
| Bimetallic (Ni-based alloy) | HRC 58–62 | Recycled material, CaCO₃, up to 20% glass fibre | 2–3× nitrided |
| Bimetallic (WC-reinforced) | HRC 62–66 | High glass fibre, flame retardants, abrasive fillers | 3–4× nitrided |
| Tungsten carbide overlay | HRC 66+ | PVDF, PEEK, highly corrosive polymers | Application-specific |
Every bimetallic screw we ship leaves with a hardness test report and a metallographic photograph of the alloy layer, with the measured thickness written on it. We do this because alloy-layer thickness is the easiest thing in this industry to overstate, and the hardest for you to verify after delivery.
What We Need to Quote Your Extruder Screw
Send these five items and you will normally have a price within 24 hours:
Machine brand and model
Screw diameter
L/D ratio
Material being processed, including any filler percentage and regrind percentage
Photographs of the worn screw, particularly the flight edges and the feed section
If you do not know the L/D ratio, send a photo of the machine nameplate and we will work it out.
Extruder Screw Lead Time, Shipping, and Payment Terms
Standard lead time is 【60-90】 days from drawing approval. Urgent rebuilds of an existing screw can be done in 30-60 days — tell us at enquiry stage, not after the order.
Screws travel in welded steel frames inside fumigated wooden crates, with the flights wrapped and the coupling end capped. We have shipped 20m screws by sea without transit damage.
| Route | Transit time | Sensible when |
| Sea LCL | 25–40 days | Planned replacement, screws under 4 m |
| Sea FCL | 25–40】days | Two or more screws, or screw plus barrel |
| Air freight | 5–8 days | Line is down and the screw is under 2 m |
Payment is 30% deposit with 70% against the bill of lading copy. We do not offer credit terms on first orders, and we would rather say that here than after you have spent a week negotiating.
Extruder Screw Manufacturer FAQ
Are you a factory or a trading company?
A factory. Business licence number 91320585MA20C4LA29, registered 2019. Video call the workshop any working day.
Can you make just one screw?
Yes. There is no minimum order quantity. Most first orders are a single screw.
What if it does not fit?
It should not, because you approve the drawing first. If a dimension we produced differs from the drawing you approved, we remake it and cover the freight both ways.
How do I know the bimetallic layer is real?
Every bimetallic screw ships with a hardness report and a metallographic photograph showing measured layer thickness. You can also send a sample for third-party testing at your cost, and we will supply an offcut for it.
Do you sell barrels as well?
Yes — screws and barrels are usually replaced together, and a new screw in a worn barrel will not restore your output.
Can you improve output rather than just replace like-for-like?
Sometimes. Barrier screws, revised mixing sections, and grooved feed sections can all help, but only if the rest of the machine supports it. Tell us your current and target output and we will say whether it is realistic.
Talk to the Extruder Screw Workshop Directly
Send your machine model and a photo of the worn screw. We will tell you what it needs, what it costs, and how long it takes — or tell you plainly if it is not something we should be making for you.
WhatsApp: 0086-13914912658
Email:kara@ttxalloy.com
Room2106 B Building, Huijin Center, Zhangjiagang, Jiangsu, China
Landline:0086-512-89598069
Business licence no:91320582MA1URG576W
