Warhammer 40K Chainsword — Motorized, Working Chain

🎬 Video demo: https://www.youtube.com/shorts/SAGhfzj7YHM

The main structural frame is laser-cut from 4 mm plywood on a CO2 laser cutter. The DXF file for cutting is located at rama_cut2.dxf.
The frame is held together with M4 bolts. A 20×20 mm square aluminum profile is used for additional rigidity. The handle is reinforced with an M6 threaded rod tightened with nuts on both ends.

🔩 Gearbox & drive

Motor: JGY-370 geared motor, 55 RPM
Gearbox bearings: 608ZZ and 625ZZ
Idler sprocket bearing: 625ZZ

Bill of materials (hardware):
| Part | Spec / Size |
|---|---|
| Plywood sheet | 4 mm (laser cut) |
| Aluminum square profile | 20×20 mm |
| Threaded rod | M6 |
| Nuts | M6 |
| Bolts | M4 (various lengths) |
| Bearings | 22809, 625ZZ ×3 |
| Motor | JGY-370 55 RPM |
| Batteries | 18650 ×2 |
| Charging board | USB Type-C |
| DC-DC boost converter | — |
| MOSFET switch module | — |
| Limit switch | — |

⚡ Electronics

2× 18650 Li-Ion batteries
USB Type-C charging board
DC-DC boost converter
MOSFET switch module
Trigger: a simple limit switch (microswitch) mounted on pins under the trigger

3D Print settings:

Nozzle: 0.4 mm
Layer height: 0.2 mm
Infill: 15–20%
Supports: yes (where needed)

Note: This is a fan-made model for personal use. Warhammer 40,000 is a property of Games Workshop. Be careful with the moving chain — the model is a prop, not a toy.