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physible mirror: Clamps

NOTE the status is: Probably it works, but i dont feel like testing or developing it further. If you try it please provide feedback for others. (be specific) clamp_ and dry_ are more likely to work than tiny_.

If i develop it further, i will likely start from scratch.


Clamps inspired on thingiverse user KidCrazy’s ‘KCS’ clamp. Untested. Intended improvements are:

  • Made it parametric.
  • Guides to center it.
  • Holes to glue some filament on in order to hold a regular spring instead of a plastic one.
  • (optional, parametric)Gap behind the teeth improves hold on clothing.


Print it, the _set.stl files contains a pair with the plastic spring, _pair.stl without.

Then put the parts together, it will resist a bit halfway due to the guide. Going in diagnonally seems to work better.

If you use the plastuc spring, just put it in. Note that plastic is subject to creep when under constant tension.

For regular springs there are probably multiple good strategies. * use metal wires and twisting them up, the spring then goes over the metal wires.

  • fuse bits of filament with the hot end, this was my initial plan but it didnt work well for me.

  • You could probably also just tie it with wire but i am not so sure how well that works.

  • Risk using nothing. Spring has friction with the plastic. There are also cones where the spring can go.

Potential improvements


  • Springs are not properly parametric(actually left out the dry_spring.stl because it didnt work well)
  • Assembly could be easier. (That might mean just turning the guides off)
  • Parameters based on what the user want, and that dont require fiddling to get right.
  • When the distance between the prongs is small relative to the length the handles collide, increasing their distance would help.
  • More defaults.


Jasper den Ouden, much inspired from thingiverse user KidCrazy.

As usual development versions on github.

Jasper den Ouden

license: GPLv3

tags: clamp, knijper, openscad

Development at: github.com/o-jasper/various_physibles

Releases: clamp-1.zip

last written: Mon Apr 7 01:36:15 CEST 2014

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