my home made brass tumbler

I was going to buy a tumbler / thumbler but i think I might source out my own build. This has me intriqued..

Biggest thing is I'd like a waterproof container to use stainless media...
 
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Posted before, here are pics of my diy build.
Motor and speed reducer straight out of a breadmaker,
Perfect rpm's and torque and pretty compact.
For size reference; drum made from 6 inch pvc pipe.

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Hi I used a old treadmill I got at the dump. cut off the belt and shortened the frame and remounted the bottom roller so a water cooler jug fitted in between. Used a bunch of wraps of black tape to keep the jug centered. Use the jug with the built in handle as an agitator. Also cut down the control head mount so it is just above the jug. 40 minutes at 1.7 mph works great. Had to stretch two pieces of rubber tubing around the jug to get it to turn on the rollers. Necessity is the mother of invention!!
Buddy who retired form the RCMP brought me 5 sandbags full of 9mm, said he wanted 200 rounds in return.
Can do around 1500 rounds at a time using water,stainless pins, dish soap and lemmy shine.
Got my stainless steel pins from a old 50 lbs reel of 1/8" mig welding wire. used a hand shear to cut into short pieces.
Rocket
 
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