Swiss Army Knife Style Key Holder
updated January 13th 2018
This works like a swiss army knife with your keys folding into the holder. There are two ends where your keys can be attached to. The center bolt keeps the keys from crossing onto each other. You can fit as many keys as you want on this, just have to get a long enough bolt.
Choices
3mm Bolts
2mm Bolts
Large Key Ring
Small Key Ring
Materials Needed
PETG, HTPLA, or ABS are preferred. Anything stronger works too. PLA may be too weak for regular use.
3x bolts
3x nuts or knurls
(If you don't know what a knurl is then look at the pictures. You can buy them in packages online. Check image for knurl dimensions needed)
Bolt Sizes
Both 3mm and 2mm bolts can be found by measuring the thickness of the keys you want to put into the key holder + 6mm.
example: 6 keys with 3 at each end (pictures). 3 keys total width is 10mm + 6mm for keyholder body insets = 16mm bolt length.
Knurl Sizes
There is a picture with the suggested dimensions of the Knurls. 3mm and 2mm knurls have varying dimensions based on manufacturer. They won't work unless you have the proper dimensions to grip the holes. Knurls can be easily put in with a large set of plyers/clamp/hammer. They need to be pushed into place so that the edges cut and grip the hole. I use these for almost everything since they are easier and more reliable than standard nuts.
Printing
Print with the inside face of each part on the print bed. This should work perfectly for any printer.
Try using high infill - 75% or above when printing.
Any ideas let me know. Enjoy!
