Tiny Magnetic Bit Holder / Screwdriver




Introduction: Tiny Magnetic Bit Holder / Screwdriver

About: I am a 25 year old Engineer from germany and like to build all kinds of things.

While building the water cooling loop for my PC in a mATX I had little space to work with and had to tighten some screws in tight spaces. None of my screwdriver could really reach there, so I decided to design and 3D print my own bit-holders. To hold the bits as well as the screws I added some 10x2mm round magnets.

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Step 1: 3D Printing

I designed the screwdrivers to be as compact as possible while still having place for a magnet and good grip for tightening.

As material I choose PLA, while not being the strongest material for 3D printing, it is very stiff. Other materials like ABS or PETG create stronger parts, but are more flexible.

Step 2: Putting Everything Together

After the 3D Print is finished I simply removed the support and pressed the magnets into place - no glue is needed.

The tolerances for the bit are very tight, so it might not fit on first try. I did this on purpose, so the bit wouldn't wiggle around. You could reprint and scale it up by 0.5% or use a trick, like I did: PLA already softens at ~60°C, so I heated a Bit with a lighter for a few seconds and then pressed it into the hexagonal hole. This slightly widened the opening and created a snug fit.

Of course those won't be as strong as metal screwdrivers, but for my purpose they worked just fine and allowed tightening in tight spaces other scredrivers could not reach.

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    4 Discussions

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    Mi cha el

    Question 7 weeks ago on Step 2

    Are you marketing these? If not, can you make me a set? I don't have the ability or the equipment to make them for myself. They are awesome.


    Answer 6 weeks ago

    As ElectroFrank already mentioned, selling 3d printed parts like this is not really worth it, since the costs per part are quite high.
    However if you are still interested, I uploaded the files to shapeways, a service where you can get the parts printed. They are $9-12 each + shipping. This will only include the printed plastic part and not the magnet.




    Answer 6 weeks ago

    3D printing is a very slow process, so not generally useful for commercial production.
    In many countries, there are community projects (maker spaces etc) which provide these facilities.
    In Britain, some public libraries have 3D printers for public use.


    Question 6 weeks ago

    How much infill did you use for printing?