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Buy a rock tumbler for post-processing CNC machined items, and more. #1023

MatthewCroughan opened this Issue Jan 6, 2019 · 3 comments


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MatthewCroughan commented Jan 6, 2019

We need one of these tumbler appliances to process raw items that come off the cnc, here's a look at what Julian has done with his swan-neck parts.

The part on the right is unprocessed, straight from the CNC machine. And on the left is the gorgeous tumbled part which is just beautiful, this can be applied to almost anything hard that is cut on the CNC machine. They're often used to make nice, shiny, smooth stones.


I've no idea what would constitute a superior tumbler. But these seem to be a good place to start, since it's not rocket science.
You simply rotate a cylinder in a filled tube of blunt stones that continually smash into the items you place in the appliance, smoothing its corners. Like a slow cooker for metal parts!

Here's a before and after of random stones, perhaps found on the beach;

It would seem that this comes with a US plug according to some reviews, which shouldn't be a problem. One pre-requisite is that it has a rubber interior, to prevent it from being incredibly noisy, bashing against plastic etc.

To avoid getting ripped off, we should take a look at alternatives and make an educated decision, such as:


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johnmckerrell commented Jan 6, 2019


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Sean-anotherone commented Jan 6, 2019

Or build one - I've seen a jewellery-sized one made from an old go-kart tyre.


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goatchurchprime commented Jan 18, 2019

Let's start with that cheap one, to get it right and get it in use. Any votes for this yet?

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