Key Holder

by 3DCentralVA, published

Key Holder by 3DCentralVA Sep 21, 2011
0 Share
Download All Files

Thing Apps Enabled

Order This Printed View All Apps





Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Thing Statistics

11496Views 1722Downloads


The conventional key ring is not very conducive to pockets. The plane of your keys is perpendicular to the plane of the ring, forming a shape that cannot lay flat. There is always some edge poking into your leg.
This is a work in progress, but the idea is a thin form-factor key holder capable of holding 3-4 keys. The thumb wheels swivel around and catch their respective key. A swivel in the opposite direction pulls the key back into the case.
You might have to adapt it to fit your keys.. Also, my original intent was for two house keys on one side and one large car key on the other.. as the model stands, some of the keys will catch on each other.
Model was designed in openscadpy (first project, sorry for the poor state of the code): https://github.com/hmeyer/openscadpy
Model was printed on up! pp3dp.com with the following settings:
quality: normal
part: 4 layers, hollow, 40 deg
support: 4 layers, 40 deg, 4 lines, 3mm2
Future work: It works pretty well for my house keys, but I'm still working on fitting my large car key.
My intent is for this product to be Open Hardware, under the TAPR OHL: http://www.tapr.org/TAPR_Open_Hardware_License_v1.0.txt



  1. Up! 3d printer, or equivalent
  2. Support removal equipment: (I have found helpful) gloves, woodcarving knives, pliers.
  3. Screw driver, medium size, phillips
    Bill of Materials:
    (4) flat 4-40 x 3/4 phillips screw
    (2) 4-40 hex nut
    (2) case.stl (printed)
    (2) thumb wheel right handed (printed)
    (2) thumb wheel left handed (printed)
    (0-4) keys
  4. Print parts (6 in total). Recommended print orientation is pictured.
  5. Remove support. This is still a bit tricky with the thumb swivels.. but the knives are helpful (always wear gloves!!).
  6. Pop keys into pegs
  7. Attach all 4 thumb wheels (they will be loose at first):

    first, make sure you have the right thumb wheel. each wheel is two discs connected by a peg, which has one cylinder to one side, and two to another. the case has a back with two screw holes. the correct thumb wheel for that side will have the two cylinders opposite the back of the case, so it can push the key all the way into the case.
    carefully life, slide, and snap the thumb wheel over the key

  8. hold the 2 cases together, lining up all 4 screw holes. first, insert the inner screws, pressing it together as you screw. attach the two hex nuts. finally, screw the last two screws in through the thumb wheels.
  9. use the keys to open stuff!

All Apps

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Print through a distributed network of 3D printing enthusiasts from across the US, at a fraction of the cost of the competitors. We want to change the world for the better through technology, an...

App Info Launch App

Quickly Scale, Mirror or Cut your 3D Models

App Info Launch App

3D Print a wide range of designs with Treatstock. Easy to use tools to get the perfect result. The global 3D printing network that connects you with high-quality and fast working print services nea...

App Info Launch App

So, you're essentially trying to make what acts like a swiss army tool case, but for keys. That's spiffy!