Lydia SJ25 — Open‑Source Lab Extruder for Filament, Small Beams, and Education
Deliver consistent results in the lab, classroom, or small‑batch production. The Lydia SJ25 is a compact, 25 mm plastic extruder engineered for research, training, and prototyping of high‑quality filament and small test beams—making it a popular choice in its class for labs and small enterprises.
Why Lydia SJ25
- Purpose‑built for filament and small beam extrusion: ideal for material R&D, QA samples, and curriculum projects
- Open‑source and hackable: documented, modular design under the CERN OHL
- Lab‑ready reliability: hardened barrel, precision‑machined components, robust taper + thrust bearings
- Easy maintenance: quick cleanouts via detachable/tilt‑down hopper; electronics and wiring to standards
- Thermal stability and durability: aluminum hopper mount for extra cooling and longer barrel life
Suited For
- Universities, technical schools, and makerspaces
- Materials labs validating formulations and additives
- Filament startups
- Recycling and circular‑materials education
Key Highlights at a Glance
- 25 mm screw with 1:30 gearbox, 50 RPM @ 50 Hz
- 1 kW motor, 220 V
- CNC‑machined critical parts; hardened barrel
- Modular framework for add‑ons, sensors, and experiments
Get dependable, repeatable extrusion in a compact footprint—perfect for learning, testing, and scaling early‑stage products.
Need help selecting setup, dies, or filament specs? Our team can guide you from first run to steady production.
| Spec | Value |
|---|---|
| Model | Lydia SJ25 |
| Version | 3.5 |
| Screw ø | 25 mm |
| Barrel ø | 40 mm |
| Barrel length | 42 cm |
| Motor power | 1 kW |
| Gearbox ratio | 1 : 30 |
| Speed | 50 RPM @ 50 Hz |
| Voltage | 220 V |
| Input flake size | Small – Medium |
| Weight | 35 kg |
| Package dimensions | 80 × 80 × 300 cm |
| License | CERN Open Source Hardware License |
Lydia Extruder Family
| Model | Price | Screw ø | Barrel length | Motor | Voltage | Output | Weight |
|---|---|---|---|---|---|---|---|
| Lydia SJ25 (Robot Printhead) | € 4 500 | 25 mm | 42 cm | 1.5 kW | 220 V | — | 35 kg |
| Lydia SJ25 | € 2 400 | 25 mm | 42 cm | 1 kW | 220 V | — | 35 kg |
| Lydia SJ30 | € 4 554 | 30 mm | 80 cm | 3–4 kW | 220 / 380 V | 5–20 kg/h | 140 kg |
