Is that a rock crusher in there?

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Project by Bill posted 08-24-2012 03:52 PM 2786 views 22 times favorited 11 comments Add to Favorites Watch

Everyone who has done one these tumblers said it was loud. I am going to say that too. Wow, this thing is loud! I am thinking of switching out the plastic bucket for a steel one, just to make it louder.

It was an interesting build, lots of trial and error. the biggest thing I learned was in sandpaper quality. The first paper I tried lasted ten minutes until it was all paper, no grit. Switched to an aggressive emery cloth and it hasn’t worn out yet.

Oh yeah, did I mention this is loud?

-- Putting the "mental" in experimental since 1973

11 comments so far

View MonteCristo's profile


2098 posts in 1276 days

#1 posted 08-24-2012 04:43 PM

Sounds like the switch to emery was a good move – not surprising in hindsight.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

View tyskkvinna's profile


1310 posts in 2074 days

#2 posted 08-24-2012 08:14 PM

What grits did you use, and how fast does it spin? I’ve been in the middle of the trial and error phase with mine lately.

-- Lis - Michigan - -

View lumberjoe's profile


2883 posts in 1336 days

#3 posted 08-24-2012 08:44 PM

Somehow I was hoping there would be a muncie m22 somewhere. I spent too much time around cars/gearheads.

-- Unplugged Woodworkers -

View dbhost's profile


5426 posts in 2320 days

#4 posted 08-24-2012 08:56 PM

Scary thing is, I was looking for a 1964 GTO 389 Tri Power M22 4 speed and posi trac…. Great now I have Ronnie and The Daytonas stuck in my head….

-- My workshop blog can be found at

View Bill's profile


395 posts in 1237 days

#5 posted 08-24-2012 08:57 PM

I start out with a 36 grit emery cloth, spray glued onto a plywood disk. then an 80,120, 180, 220grit disk sanding sheets, then buff. Still working the bugs out of the buffing wheel.

The motor spins at 1725.

-- Putting the "mental" in experimental since 1973

View Woodstock's profile


241 posts in 2376 days

#6 posted 08-24-2012 10:15 PM

I used my setup to make some figured claro walnut balls (ovals?) about 1.70 inches in diameter for a little kids push toy a few days ago. These larger diameter blocks were big enough that I could only run 3 at a time in my 1 lbs coffee can.

As the video below shows I had to clamp the lid down as the buggers kept trying to escape. The background noise is mostly of my shop-vac, and you can see how I hooked up to the can to keep from manually stopping and vacuuming out every few minutes.

And sorry for the video being 90 degrees on its side. I’ll know better next time.


-- I'm not old. Just "well seasoned".

View rance's profile


4197 posts in 2248 days

#7 posted 08-24-2012 11:55 PM

Looks like you found your True Grit. Looks great. The similarity of mine and yours is scary. And I havn’t even posted mine yet.

Lis, bigogre’s data in post #5 is spot on.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View ronbuhg's profile


121 posts in 1236 days

#8 posted 08-25-2012 02:10 AM

been thinking off building one of these….the loudness part does not bother me at all since I am 85% deaf….LOL….good to know about the emory cloth….wondered how long paper backed sandpaper would last….I figured about 10 minutes at best…..liked the comments about the “rock crusher tranny ” & the daytona….Im a gearhead when away from the saws…....the two best hobbies…

-- the dumbest question is the one you dont ask !!

View majuvla's profile


5768 posts in 1955 days

#9 posted 08-25-2012 03:35 PM

It’s worth of every noise.It is nice dekoration or jewellery at the end.

-- Ivan, Croatia, Wooddicted

View scottb's profile


3648 posts in 3415 days

#10 posted 09-02-2012 12:08 PM

I always thought something like this would work. Glad to see it does. Looks like an easier design than the wet method with rocks I’d been contemplating for a couple years – meanwhile I’ve collected tons of tiny pieces to polish.

-- I am always doing what I cannot do yet, in order to learn how to do it. - Van Gogh -- --

View helluvawreck's profile


19499 posts in 1954 days

#11 posted 09-02-2012 12:22 PM

That’s a real interesting project. I would love to have one of those.

helluvawreck aka Charles

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

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