This is a shaft collar designed to work with a 6mm shaft. Use a M3 bolt and nut as shown in the images. The nut may require tweezers or a small screwdriver to get it in place.

Print Settings:

• Infill: Cubic 20%
• Layer Height: 0.2 mm
• Supports: None
• Adhesion: None

I used Printerior rPLA, but I think any PLA will work fine. Perhaps other filaments would work too.

This model was heavily designed around this model: https://www.printables.com/model/49725-adjusting-ring-shaft-collar-8mm-10mm-m3

STEP files are included in case you would like to edit the model. Feel free to do so! If you have any questions/comments/concerns, please leave a comment below.