This is a design exercise to reverse engineer a commercially available Gear Ring into a fully 3D printed working model.
UPDATE - added 23mm and 19mm versions
BOM
1x - Gear ring main body with the outer rings
6x - Gears
6x - Studs
PLA or any kind of plastic cement. Slow curing is highly recommended.
Assembly
- Very carefully and remove the organic/tree supports from the main body
- Lay out all the parts as shown in photo
- Ensure all the gears are oriented correctly and ready to be installed.
- Test fit the stud through the gear and correctly installed would look like photo shown with the stud protruding out
- Move the outer rings on the main body to the outer edge as shown in photo
- Test fit the stud through the gear and into the main body
- Apply very small amount of cement to the recessed hole in the main body
- Install the stud through the gear and into the main body as shown in photo.
- Once this first gear is set. install another gear on the opposite side of the main body as shown in photo. Once again allow the cement to cure
- Very gently test rotate the outer rings.
- Install the remaining gears.
Moving parts have a 0.4mm tolerance
Fixed parts have a 0.2mm tolerance
This is a working model more than an actual EDC fidget ring. Don't rotate too fast or apply too much force while rotating the gears.
Happy New Year!! and Happy Printing :)