My wife recently started making beads and other things from polymer clay, and wasn't getting quite the finish she wanted using sandpaper.  It turns out that even children's toy rock tumblers are relatively expensive and the professional models are definitely out of our price range, so she asked me to see if I could assemble something from old bits and pieces we had laying around.

The kind of tumbler I've seen before seemed like a fairly simple arrangement - some kind of barrel turned by horizontal rollers, similar to a tumble dryer, so that's what I set out to build.

Step 1: Parts List

Parts list - these parts all came from my junk pile. Nothing was purchased for this project, so technically it cost $0 to build. As suggested by several people (iceng and ottwafm), the tumbler would be more durable if some kind of wheel bearings were used for the rollers. Bearings for skate board wheels or ride-on mower decks should be easy to find locally.

1) electric motor from Grand Am electric window lifter.
2) old PC power supply. This one happens to be a 90W supply.
3) rollers - could be broom handle or any round pole. These are actually mini rolling pins from my wife's craft supplies.
4) various bits of wood to make a frame and base board.
5) 2 inches of garden hose.
6) power switch.
7) screws, coach bolts w/ nuts
8) anti-slip shelf liner

Tools required:

1) Saw
2) Screwdriver
3) Drill + appropriate sized bits
4) Wrench
5) Sharp knife
6) Soldering iron (or use crimp-on spade connectors)

<p>Try running several beads of bathroom caulk or liquid nails, evenly spaced, the length of your can or jar to create the needed bead and sand roll over. The tumbling affect should decrease the tumbling time immensely. If allowed to cure thoroughly these adhesives should not affect your polymer clay beads.</p><p>I'd also suggest that if the slurry climbs very high up the side of the can or jar you spritz the slurry with a little water. If you can't see the slurry in your container listen for slight thumping sounds of material falling (instead of rolling).<br><a href="https://www.google.com/search?q=thoroughly&spell=1&sa=X&ved=0CBsQvwUoAGoVChMIu4rTloTpxgIVTjKICh0h7QyE&biw=1920&bih=935" rel="nofollow"></a></p>
<p>I did that but before the caulk cured, I realized that I could put objects on top of the beads that would churn up the mixture even more. I used sheet metal snips to cut some thin metal tubing and a hack saw to cut some 3/4&quot; wooden dowels. used 5 of each thing</p>
<p>Thanks for the tip!</p>
<p>Really great instructions Well done I've got the parts to make one but I'm going to use steel bars on small bearing's but your idea is brill john</p>
I'm going to try and make a rock tumbler using one of those 120v motors from microwaves that turn at ~30rpm.
<p>I tried that - the problem is that it's so slow that the jar will do two or three revolutions per minute, so it will take forever to polish anything.<br>What I then did was connecting the motor through a flexible steel shaft to the cover of the jar. It works, but it's not as simple and functional as this one.</p>
I agree with iceng. Try using skateboard wheel bearings. Or something similar.
Yes, some kind of wheel bearings would definitely be a good idea. At the time of building, I had a minimal budget to work with, and was really happy to be able to complete the assembly for $zero outlay. As it happens, the tumbler was used for less than two weeks, and has been gathering dust since. I have updated the parts list to suggest wheel bearings for durability.
<p>My free-ninety-nine take on your awesome tumbler!</p>
<p>Running 4 tumblers 24/7. I loose a tumbler with good bearings every few months for some mechanical reason or motor.</p><p>Your Ible is well presented and made however wood on wood even with lubrication will not long last. </p><p>See if you can modify it to use a bearing for conger life.</p>
Thank you for the suggestion. I would probably fit some kind of ball-bearing races if it ever needs upgrading. However, right now it is barely being used at all, and the original dry sockets are holding up OK.
Awsome. I have a different use. I have a whole lot of ammunition brass I want to sell but needs to be cleaned. I had a vibratory cleaner that burned out. Then I saw online people using Thumblers Tumbler with number 47 stainless steel pins. It's in water with a few tablespoons of dish soap. The results were better than anything I did with my dry media and vibrator. When I looked to purchase the tumbler they were anywhere from 100 to 250 and up. 5 pounds of pins around 30 bucks. This invention will work wonderfully except I'm worried how the coffee can will hold up with all that brass and pins rolling around in there. Anyone use one of these for this?
<p>I'm going to make one for jewelry and my husband may use it for his brass. I was looking around on YouTube and saw someone using a big thermos. That's what I'm gonna try. They're pretty thick so I think it'll be fine. </p>
<p>You could equally well use something like a paint can, those generally fit tight enough to need a mallet to close. Any tube with a screw top would work too - a strip of duct tape would help stop it unscrewing. Once you find an appropriate container, you can size the frame to fit. Also, you'll want to pick a motor that can drive the weight without running too hot, and make sure the rollers don't bind. You could even pick up some cheap ball bearing races for the rollers.</p>
excellent project. I only suggest (unless another beat me to it) you can coat the rollers with silicone rubber in a tube (if you have left over from something else), or even several coats of rubber cement or rubber inner tube sleeves.. <br> <br>but use wut ya got! <br> <br>verra nice indeed
Thank you! As it happens, we had a couple of yards of rubber shelf liner available, so that's what was used.
what do you put in it to polish the beads?
My wife has tried a number of different things, from play sand slurry down to small dry squares of fine sand paper and denim. I'm not sure which produced the best results. I suppose it depends partly on how smooth the beads are to start with.
well done thanks<br>
Totally awesome job. I have a VERY expensive rock tumbler, but needed an extra barrel. I tried the folger's coffee can, but it did not turn reliable. Now I will try adding the shelf liner. It was a big DUH when i saw what you did. <br> <br>A few tips: Normally you would use tumbling grit instead of sand. I am going to assume that the beads are already reasonably shaped, you just want to add a polish, so a finer grit or even a polish should work fine. <br> <br>There is way too much sand. Depending on the size of container, back it off to a few tablespoons of grit, and then fill it up about 1/2 way with water. <br> <br>You do not need any vanes. If you get the slurry to the right consistency, it will slide as needed on its own. <br> <br>Good luck and let us know how it works. <br> <br>P.S. A lot of folks use a thin coat of Future floor wax on the beads, and then bake them gently in a low oven. <br> <br>
Thanks!! I give my wife credit for the shelf liner - I thought maybe just wrapping the rollers would work, but she went ahead and wrapped the barrel too, which works substantially better.
this is such an awesome project. i will inddeed give it a go. 5/5 from moi. <br> <br>
Very good work! <br><br>Yes, to add vanes is a need. But it is an easy task, now.
Thank you! <br><br>We probably won't use the glass jar much. The big red tub in some of the photos is a coffee can with a built-in grip that functions very nicely as a vane. Also, being plastic, I can easily screw through it to add vanes as necessary.

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