Choosing a single screw extruder for plastic and filament work is a tradeoff between production-oriented power and bench-scale flexibility. The TECHTONGDA SJ25, listed at USD 2,085.86, is positioned as a processing mother machine that needs auxiliary equipment. The 3D Filament Single Screw Extruder, listed at USD 227.99, is a compact unit aimed at experimental testing. Here's how to decide.
Quick Verdict
For a higher output, full heating range, and a 25mm screw, the SJ25 is the more complete extruder despite requiring extra gear. If you need a lower-priced, universal bench unit for small batches and are willing to work around a missing motor, the 3D Filament extruder is a practical starting point.
At a Glance
| Product | Listed Price | Price Bar |
|---|---|---|
| SJ25 Single Screw Extruder (TECHTONGDA) | USD 2,085.86 | |
| 3D Filament Single Screw Extruder | USD 227.99 |
Where Each Product Wins
Where the SJ25 TECHTONGDA Wins
- Screw and output: 1-inch (25mm) screw, LD 14:1, motor power 250W, output capacity 0.1-2kg/h.
- Speed range: 0-20 r/min.
- Heating range: Maximum heating temperature of 350°C.
- Material range: Suitable for PEEK, PCL, ABS, PLA, PETG, TPU, TPE and other common 3D printing consumables.
Where the 3D Filament Single Screw Extruder Wins
- Universal compatibility: Compatible with universal models.
- Heating setup: 200W ceramic heating coils for fast heating, with a 2.5mm default nozzle.
- Compact design: Features an aluminum alloy heat sink and dual-clamp screw mounting, ideal for experimental research and small-batch testing.
- Build details: 45-gauge steel screw with high-temperature resistance.
Product Notes
SJ25 Single Screw Extruder (TECHTONGDA)
The SJ25 is a real processing machine in the plastic extrusion sense: its 25mm screw and 250W motor are built around a 0.1-2kg/h output and a 350°C max heating temperature. Choose it when you want to work with a broader set of thermoplastics and are ready to connect moulds, cooling, hauling, winding, or cutting equipment. It is a mother-machine-tool for plastic extrusion processing. The caveat is setup: it requires auxiliary equipment to complete finished products, and the instructions stress avoiding contact with the heating area during use. If you already have a line or are building one, this is the more capable base. If you expected a plug-and-play desktop unit, this is not it.
3D Filament Single Screw Extruder
For anyone experimenting at small scale, this 3D Filament unit offers an approachable way to start extruding. Its 200W ceramic heating coils are paired with a 2.5mm nozzle by default, and the universal compatibility means it can be slotted into different test rigs. The compact aluminum alloy heat sink and dual-clamp screw mounting point to a bench-friendly design, while the 45-gauge steel screw adds high-temperature resistance. The machine does not include a motor, so you need to account for that separately before this extruder can run. Also, the default nozzle is 2.5mm; a 1.75mm nozzle must be purchased separately. This is best for users who already have a motor or drive setup and want a heating-and-screw module for small trials.
Final Choice by Use Case
- If you need a production-capable extruder with a 25mm screw, high-temperature heating, and a clear output range, the SJ25 is the right buy, provided you can supply the downstream equipment.
- If you want a compact unit for experimental extrusion with universal compatibility and can source a motor yourself, the 3D Filament Single Screw Extruder is the more practical pick.
