Here you will find the main resources for the Rat RiG Mill, including the CAD model, Bill of Materials, and printed parts files.
CAD models for all Rat Rig Mill variants are available through the Rat Rig Fusion 360 online viewer.
Rat Rig Mill - Beginner Kit
Rat Rig Mill - Intermediate Kit
Rat Rig Mill - Advanced Kit
- Open the web viewer for your variant to inspect the full assembly directly in your browser.
- Inside the viewer, you can download the complete model or individual components as needed using the download button in the top right corner.

- The CAD models can be used as a reference when building, servicing, or customizing your machine.
Official BOM Rat Rig Mill
- The official BOM spreadsheet available for the Rat Rig Mill.
Rat Rig Mill Printed Parts Pack
Individual STLs available on GitHub
- All files are provided in the correct orientation for printing on a standard FDM 3D printer.
- In general, the printed parts are quite forgiving but are also quite large.
- If you suffer from drafts and/or poor bed adhesion you may need to use brims/rafts for some parts to prevent warping.
- Perimeters: 4
- Line Width: 0.45 mm
- Layer Height: 0.2 – 0.3 mm
- Infill: 25%
- Supports: None

- When slicing the files, some holes may appear covered.
- This is intentional to help the slicer create bridges and simplify the printing process.
- After printing, clear the holes using a screw, screwdriver, Allen key, or matching-size bolt.