You will have to make clearer on the test you want on the central
cone and why.

The movement is based upon the bowl shape and the central cone
as you have a rotation of material on radials and therefore it
moves up the cone and over the top and down the bowl side under and
back around. There are horizontal forces that turn this into a
cork skew thereby tumbling small objects along the way.

Martin

Michael Koblic wrote:

"Martin H. Eastburn" wrote in message
...
That is odd indeed. I think now I have the 10 and got the 25
consumables.

I put in small quarter and 50 cent and dime size steel that have
melted steel
on the edges - from plasma cutting - and have ceramic rhombic shaped
ceramic
that THEY sell as a part number. They also sell round/octal chunks
that are
different in actions. I'll try them next. I've almost rounded these
and they
are still working. It works wet or dry - and has a drain an drip in
port.

There isn't a frequency spec. It is multi-modal in action.

It isn't a vibration tank - I have one as well. Those are frequency
defined.

It sounds like you want a cleaning tank not a vibration polisher.

The tank is plastic - thick rubber type. It goes up/down and side to
side.
Internally it rolls the material in a form like a donut - the center is
a 'post' cone like - that bolts on the lid.

A part has to be sized to the opening on one side and small enough to
drive up/down. in the cycle.

What are you trying to to - and what is the size ?
I'd have to take a measure to mine.

The short answer is "I haven't a clue". the long one is "I want that
thingy wot did such a wonderful job on the titanium hip joints on TV".
Seriously, forget my idiocy about the vibration frequency - Hz being
events per second rather than per minute. Lord knows I should know!
I am pretty sure the vibrating tumbler is the way to go. As to the size
of things - well, there is a wide selection. I was even wondering if you
could put rings around the central column (one at a time) and see if the
movement of the media over and around them would suffice in absence of
free movement of the part itself. So far I have not found anyone who has
tried it.

I was also wondering how essential is the doughnut shape of the bowl to
the proper action of the unit. I suspect not as I have seen other
(generally bigger) vibrating tumblers which have different shapes (see
Dave Billington's post - I think). As none of this is life-saving I can
play with the concepts for a while.