Basic info
- ring/tube
- material: strong or bendable
- measures: diameters: inner ⌀ min 40 mm outer ⌀ max 54 mm; height: ~10mm, min 9 mm; gate: the small gate at one side is 2 mm x 2 mm.




Tolerance
- Size: some deviation from the standard tolerance: Inner ⌀ min 40 mm outer ⌀ max 54 mm, height min 9 mm. (The current use cases do not necessarily require this part to be round – as long it has enough space to place something round with a ⌀ of 40 mm in the center. This might change though with the discovery of future use cases.)
- Material: standard tolerance
Get this part
- Buy: Available as local make.
- Make: 3 ways to make this: (1) Find some fitting pipes, cut them and add the little gate with a saw. This requires some craftsmanship though. (2) You can also 3d print this easily. > STL file Download (3) Another way to make this is to get some strong bendable material like PP, cut out a stripe and melt it together or bolt it together to a perfect circle.
Introduced by
- Lars Zimmermann via Trikkka headphones
- Open: Shared under TPP 1.0
- Original post (15), original post backup pdf (15)
- Disclaimer
Download Portal
Most parts have open design and manufacturing files you can download and work with.

More Parts
123.1 – spacer with 5° angle
113.1 – Hinge 1, ⌀ 6mm holes
049.3 – Board 135x240x16mm
095.5 – 210mm rod with M6 insert threads, ⌀ ~30mm, “elephant rod”
096.1 – 180x630mm bendable surface
032.1 – Strap 300mm, 10 holes
087.1 – M6 washer 20mm
082.2 – M6 bolt 70mm
Play ↻
Do you have any new ideas on how to use these parts? Share it.