Fully Printable OTF Fidget Knife Toy - No Springs or Bands
Design preview. Rendered from the file, not a photo.
This model is not currently offered as a verified ready to buy print.
What it does
- Completely 3D printable with no rubber bands or metal springs required
- Built-in coil mechanism creates realistic OTF knife action
- Perfect desk toy for fidgeting and stress relief
- PLA+ recommended for optimal coil strength and durability
- Easy customization - try different coil directions for best performance
This fully printable OTF (out-the-front) fidget knife toy delivers satisfying tactile feedback without requiring any purchased hardware. Unlike traditional designs, every component prints in one go, no springs, rubber bands, or assembly frustration.
The integrated coil mechanism is the heart of this design, providing the spring action that makes the blade deploy and retract smoothly. Coil direction significantly impacts performance, so you can experiment to find your preferred feel. Clean deburring of the 90-degree angles, especially where the spring lock catches the blade, ensures smooth operation right out of the printer.
This gadget makes an excellent desk fidget toy for anyone who enjoys tactile, mechanical objects. The OTF mechanism offers a satisfying click and motion that's ideal for keeping hands busy during calls or brainstorming sessions.
78k downloads in the maker community. That is interest in the design on the site it came from, not our sales.
What you get
- This design prints as one piece.
- Nothing else to print or buy for this to work.
What it is made of
Designs like this print well in PLA. Compare the materials.
Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.
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Who made this design
Designed by LUN5HTIME. We did not draw it.
Shared under Creative Commons, credit and share alike. See the original design