That is really, really cool. I also like the 'demo samples' the rapid
prototyping guys have on their stands at exhibitions. Spheres within cubes
within ellipsoids etc....
I'd look at the large vibratory polisher / tumbler that HF sells (on
sale now). It looks like it should be large enough to handle 2" cubes.
I have the smaller version that I picked up for cleaning / polishing
brass for reloading, but I haven't got around to using it yet. It looks
decent enough at any rate.
They also carry some assorted media for the tumblers, and of course you
can get media from a lot of other places as well.
Polishing is the first step of course, after that you need some sort of
finish to protect from rust or oxidation. There are a lot of options
depending on what material you are making the parts from, look at the
Caswell site for various ideas.
I had the Dillon vibratory polisher.
I bought it to deburr aluminum workpieces.
It was *way too* gentle for that. It took hours to make very little
visible progress. Prolly just fine for putting the final polish
on brass, though.
Next time, I will go with a real tumbler.
Prolly get an old wood lathe and modify to suit:
I don't do tumbling, but everything I've read says that vibratory
tumblers work more quickly than rotaries.
This big guy seems to work more quicky.
Um, that's not a wood lathe and I'll bet he goes through 5gal buckets
several times before he has to change media in that thing.
Can't beat the price. I got my old wood lathe and two 1/3hp motors
for $20 at a tailgate sale in Sandy Eggo.
"I probably became a libertarian through exposure to tough-minded
professors" James Buchanan, Armen Alchian, Milton Friedman "who
encouraged me to think with my brain instead of my heart. I
learned that you have to evaluate the effects of public policy
as opposed to intentions."
-- Walter E. Williams
Here's the actual cleaner. It is *dry use* only.
There is a tiny size and capability difference, IMHO. :)
* Built pretty stoutly,
* Says 'Logan' on the headstock,
* Has a compound instead of a tool rest,
* Capable of crawling along at ~50 RPM
You might be right, Larry. :)
I have been using a plastic pail as a tumbler for years. I have a big
enough lathe that I can chuck the pail and use the tailstock to hold the
lid in place. A couple of 2x2 slats on the inside of the pail held in
by some sheetrock screws makes the tumbler complete. I use it mainly for
stamped parts that need deburring.
That will depend entirely on the media you use
and the time you're willing to devote to the
process given the machinery deployed.
But if you need to get deep milling marks out,
you can count on angle sharpness suffering in
the indiscriminacy of the process.
I looked for Turner's cubes on eBay once and
only saw some cheesy plastics. You might
try a metal with an apparent color turn away
from aluminum, say bronze/brass, to gauge
differential customer interest.
A nice historical blurb on the history of the cubes
and their significance in evaluating a machinists
skills would be good alongside some nice
poetic quote about "world's within worlds",
"atoms within mass", "geometric projection", etcetera.
Punchy lines are great but the copywriter's guide is
that interested clients will read all they find interesting.
Your descriptive powers will not have insignificant
result. If you ever read the blurbs accompanying the
"pet rock" phenomenon, there's proof.
I think that clamping this is to rotary table do difficult, that flipping the
over 6 times is easier.
If I wanted to make quantities, I would machine three cubes at a time,
setting three in a row in a vise.
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