"vibepolisher.jpg" is a composite file of 7 pictures & text of a vibratory 
polisher that I built.  I have formatted it as a composite to allow all the 
pictures to be seen by scrolling, without the back-and-forth required with 
multiple images and separate text.  However, if your browser is set to fit the 
image to the screen, the individual pictures will be very small and the text 
impossible to read.  If your browser is FireFox, clicking on the image will expand 
it.  Other browsers may require that "fit to screen" be turned off.

Using a tread mill motor allowed the speeed to be adjustable.  The Eastwood 
catalog said 3000 rpm was best, so that's what I set mine for.  At that speed 
there is very little displacement.  At slower speeds it can be quite violent.

I originally used latches to hold-down the bowl, to allow easy removal.  But they 
did not hold it tightly enough and I went to bolting it down.  With the intensity 
of the vibration, things really need to be tighly fastened.  Looseness causes 
noises and erosion of the contacting pieces.

In operation, the medium has a rolling action: it "flows" up the sides & center 
cone and down the middle.  I'm not sure what the purpose of this is - maybe it 
keeps the parts from floating to the top.

The paint job sucks - the top coat was not compatible with the primer and it 
puckered.  I'll strip it down and re-do it WIGATI.

This whole project was motivated by the idea of polishing silverware.  So that is 
what I have used it for.  I first tried plain corn cob medium.  It worked, but was 
slow.  So I added some jeweler's rouge (1 Tb/lb) and it speeded up amazingly (10 
min vs 3 hrs).  Curiously, the concave insides of the spoons were not polished.

I'm thinking that I might have the makings of a paint shaker.  If I replace the 
bowl with a paint can holder and dial down the speed, it might work.  Or it might 
just tear itself to pieces.