Sirius AM is the first balisong trainer in our open-source project lineup.
Our open-source projects are released to the public so anyone can make one for personal, non-commercial use. Sirius AM was created to make balisong flipping more affordable, accessible, and available to more people, in more places, anytime.
We will also make Sirius AM available directly through our website, offering one of the most affordable and accessible entry points into the balisong community for those who prefer a ready-made option.

Project overview
- 3D printed balisong trainer project
- Released publicly for personal, non-commercial builds
- Designed as an affordable entry point into the balisong community
- Hardware dimensions provided for builders and makers
- Available on MakerWorld for easy access and printing
Specifications
| Total length, open | 291 mm |
| Total length, closed | 163 mm |
| Blade length | 149 mm |
| Handle length | 159 mm |
| Total weight | 76.9 g |
| Material | Plastic |
Download project files
The Sirius AM open-source files are available on MakerWorld:
Personal, non-commercial use
Sirius AM is provided for personal builds only. You may print and assemble one for yourself, tune your own build, and share your finished trainer with the community.
Commercial resale, paid manufacturing, kit sales, or distribution of assembled units based on this project is not permitted without written permission from LDY Balisong.
Hardware dimensions
All measurements below are in millimeters. These dimensions are provided as a reference for sourcing and checking compatible hardware. Always confirm fitment with your final print settings, tolerances, and assembly before use.
| Hardware reference | Dimensions from drawing |
|---|---|
| M4 T10 screw | M4 thread, T10 drive, Ø7.00 head diameter, R2.00 head radius, 2.50 head height, 7.50 length reference |
| Washer | Ø9.00 outer diameter, Ø5.1–5.2 inner diameter, 0.50 thickness |
| Cylindrical pin / spacer | Ø3.50 diameter, 8.60 length, C0.2 chamfer |
| Bushing / sleeve | Ø6.98–6.99 outer diameter, Ø5.00–5.01 inner diameter, 5.20 height |
| Pivot screw reference | M4 thread, T10 drive, Ø7.00 head diameter, R2.00 head radius, 2.50 head height, Ø5.00 shaft, 8.50–9.00 length reference |
Hardware drawings
Use the drawings below as visual references for the hardware dimensions listed above.
screw and washer

Cylindrical pin / spacer

Bushing and pivot screw reference

Build notes
3D printed parts can vary depending on material, printer calibration, slicer settings, and hardware fitment. Inspect all printed parts before assembly and stop using the trainer if any part becomes cracked, loose, or damaged.
Safety and legal notice
Sirius AM is a balisong trainer intended for practice only. Use responsibly, keep away from children, and follow all local laws and regulations before printing, building, carrying, or using any balisong-style trainer.
Ready-made availability
For anyone who does not have access to a 3D printer, we will also make Sirius AM available through our website as an affordable option.

