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FREE SHIPPING ON ALL ORDERS!
FREE SHIPPING ON ALL ORDERS!

Explore Versatile Tumbler Options: 8 Barrel Sizes & 19 Combinations

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Achieve a flawless finish every time with MJR Tumblers 12,000 mesh Aluminum Oxide Extreme Polish.

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The Secret to Perfect Cascading Action: Round Barrels with Lifter Bars

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Any questions or concerns feel free to call us!

MJR Tumblers are versatile, with 8 different barrel sizes and 19 different barrel combinations possible.

Experience up to 50% faster polishing with MJR Tumblers.

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FAQ

How much is in each grit kit?

The rule of thumb is 1oz per pound of rocks you're going to polish for step 1 and step 2 and 1/2oz per pound of rocks for step 3 and step 4.

For example: A 30 pound grit kit doesn't not mean 30 pounds of grit. That would be 30oz of step 1, 30oz of step 2 and 15oz of step 3 and 15oz of step 4.

What stones can I polish?

Here's a simple and easy way to know. It’s recommended that the stones you plan to polish in your rock tumbler to be harder than glass. A very easy test to confirm if your stones are indeed harder than glass is to lay a piece of glass on a flat surface. Then with firm (not excessive) pressure drag a point of the stone across the glass. A powdery streak will be made. Blow away the powder. If there is a scratch in the glass the powder was from the glass itself and your stones are good to go!

My stones are shiny when they’re wet but hazy when dry after the final polishing step?

Try burnishing your stones! Fill your barrel ¼ full of plastic pellets, put your polished stones in the barrel until it’s ¾ full, add ½ tbs of Dawn Dishwashing soap and tumble 24 to 48 hours. This step will clean and polish your stones removing any haze on them.

Blogs

  • Matthew Romey

    BARREL PRESSURE TRICK

    OK, so your experiencing pressure building up in your barrel as it rolling? Here's a trick that seems to work pretty well. Add a couple antacid tables to each of the first two stages. I'm partial to Cherry Flavor myself...

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  • Matthew Romey

    WHAT STONES YOU CAN POLISH

     WHAT STONES YOU CAN POLISH Here's a simple and easy way to know. Its recommended that the stones you plan to polish in your rock tumbler to be harder than glass. A very easy test to confirm if your...

    Read now

Barrel Configurations