Spare parts for crossheads & extruders
The parts that stop a line when they wear or break, made to drawing or to match your old part, for Sai equipment and other makes.
Crosshead parts
- Tips and dies: see tips & dies.
- Cartridges (tip holders) that carry and locate the tip.
- Front and back nuts that clamp the tooling stack.
- Skin tools and core tubes for skin-layer and multi-layer heads.
- Die blocks and skin blocks for larger heads.
- Jelly dies and inserts for jelly-filled cable.
Breaker plates and screen packs
The breaker plate supports the screen pack, builds back pressure for better mixing and straightens the melt flow into the head. A cracked or blocked plate shows up as pressure swings and surging. We make plates to your extruder size and hole pattern, in stainless steel or other grades.
Extruder and line parts
- Band heaters for barrels and heads.
- Mounting plates, flanges and clamps that join the head to the extruder.
- Screws and barrels: see screws & barrels.
- Other line accessories are on Sai Extrumech's spare parts page.
Parts for other makes
We regularly make replacement parts for heads and extruders from other makers, including Maillefer, Erocarb, Eurotek, Microdia and Unitek. Brand names are used only to show compatibility. The fastest route is to send the worn part or a drawing. If you have neither, send photos with the main dimensions: diameters, lengths, threads and bore sizes.
A sensible spares kit
| Part | Why keep it in stock |
|---|---|
| Tips and dies for your main sizes | Worn tooling directly affects wall and concentricity |
| Breaker plate and screens | Blocked screens stop production |
| Band heaters and thermocouples | A failed heater changes the melt within minutes |
| Nuts and seals for each head | Damaged threads or leaks during changeovers |
Order spare parts
Send the part name, the equipment it fits, quantity, and a drawing, photo or the old part.
Frequently asked questions
What spare parts do you supply for extrusion heads?
Tips and dies, cartridges (tip holders), front and back nuts, skin tools, core tubes, die blocks, breaker plates, band heaters, jelly dies and inserts, mounting plates and clamps.
Do you make spare parts for other makes of crosshead and extruder?
Yes. Replacement parts can be made for heads and extruders from other makers, including Maillefer, Erocarb, Eurotek, Microdia and Unitek, from the old part, a drawing or measured dimensions.
What is a breaker plate for?
A breaker plate sits between the extruder screw and the head. It supports the screen pack that filters the melt, builds back pressure for better mixing, and turns the spiral flow from the screw into straight flow into the head.
Which spares should I keep in stock?
Keep tips and dies for the sizes you run most, a spare breaker plate and screens, band heaters and thermocouples, and the nuts and seals for your heads. These are the parts that most often stop a line.