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An electric toothbrush as a small sander? Yes!

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OK, get the laughing out of the way, this idea works! The toothbrush I used was an Oral B Pulsar. I also tried a toothbrush with a circular head that oscillates from side to side, that didn't work. I started to cut the bristles from the Oral B before realizing I could hot melt glue the sanding platern (a bit of lolly stick) to the back. The sandpaper is stuck on with double sided tape. At first I only used it for sanding small areas of filler on my PLA 3D prints. But it will also sand the PLA itself. I use various grades of sandpaper to suit the job. Just use gentle pressure to produce fine dust, and it gets into those difficult areas. I use small files for the initial surface preparation.

That's a great idea ! A small sander would be bloody useful for resin prints .

I came up with the idea when I had to sand the spokes on a PLA printed flywheel some time ago. I was very surprised it even worked. On PLA I still use files to remove the worst of the layer lines but then switch to the toothbrush with 320 grade wet or dry. A coat pf primer then shows the bits I missed. It also works very well on filler to hard to reach areas. If I could have bought a small electric sander for about 15 I wouldn't have tried this. I did think of trying a different way to mount the sandpaper to make it easier to change from one grit to another. It works very well with resin prints, no filing required.

For some small detail work I've made sub-miniature Dremel/Foredom sanders by attaching sandpaper to the heads of carpentry nails (approximately 0.25" diameter).  I punch the sandpaper disks from standard size (~5" diameter) self-stick sanding disks, thus avoiding the need to mess about with glue.

Some pictures here...

Thanks for the link Marv. I have looked at the Dremel you've listed on your post on the homemade tools website, it looks a bit easier to use than mine.


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