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Magnetic Polishing/follow the bar!


#1

I’m not sure if this has been discussed(still have 300 e mails
left … been down for 2 months) but recently saw a polisher at a
supply house set up for a demo. A clear bowl contained brass
rings (for the demo) in a clear liquid with small metal(3/8" long
22(?) guage, stainless steel…as told) wire mixed in the
solution. THE solution was atarted from a power and water.
Complete polishing of the rings took about 20 minutes!!! THis
was the ‘small’ unit price at a ‘’’ reasonable ‘’’ $1700.00.

THis unit works the same as the old chemistry mixers . . that
is, set a beaker with a soltution on the ‘unit’ place a stainless
steel bar in it and the magnet in the unit rotates …the bar
follows causing a stering action!

CAN’T BE THAT TUF TO MAKE!!!.. HOW DO U CONTROL THE SPEED OF
A ROTATING MAGNETIC FEEL… REHOSTAT IN A MOTOR WINDING??

(SORRY AOBUT THE SPELLING … STILL HAVE TO GET THE SPELL
CHECKER WORKING)

Jim


#2

Jim,

A friend of mine has one of the new magnetic polishers. Wow! are
they great. Part of the expense as i understand it is that they
require rare earth magnets, which are very expensive. also the
magnets rotate in a very similiar manner as the earth around the
sun. they spin as they rotate in orbit. the shotis a very small
pin shot and very expensive 70/80 dollars a pound. all in alll an
expensive piece of equipment for a one man shop but on the top of
my want list is i can find a used one or get 90 days. the polish
time and the quality of the polish in fine detail especially in
silver and platinum is well worth it. If you find a cheaper way
of producing one (and you have to find a way around the patents)
let me know. In the mean time i will just have to save my penny’s
and continue to drive across town to borrow my friends.Houston is
a BIG town. Frank


#3
solution.  THE solution was atarted from a power and water.
Complete polishing of the rings took about 20 minutes!!!  THis
was the 'small' unit price at a ''' reasonable ''' $1700.00.
THis unit works the same as the old chemistry mixers . . that
is, set a beaker with a soltution on the 'unit' place a stainless
steel bar in it and the magnet in the unit rotates ...the bar
follows causing a stering action!

Jim,

I know exactly what you are talking about. I showed my
spouse the catalog from Swest and Gesswein with the new
magnetic polisher and we both just cannot wait to create
our own magnetic polisher for under $100.00. The only
big expense will be the liquid and the stainless steel
shots.

So far we have a list of used lab equipment where we can
buy the magnetic stirrers.
May be John Burgess may have a lot more hints on this subject
since worked in a lab.

From Surbhi


#4
 A friend of mine has one of the new magnetic polishers. Wow!
are they great. Part of the expense as i understand it is that
they require rare earth magnets, which are very expensive. also
the magnets rotate in a very similiar manner as the earth
around the sun. they spin as they rotate in orbit.  

Hi. I brought a couple of 14kt rings and a pendant to the
manufacturing show in N.Y. several months ago, to try out this
magnetic tumbler. All of the big supply houses had one for sale.
I gave my samples to Gesswein. She told me to come back in
about one half hour. (my samples were bombed, and lightly
sanded). when I returned, I was very unimpressed. Although
they looked a little polished, they were no way near finished. I
mentioned it to the nice lady, and she said to me that I would
need to prefinish them more before using the machine. well, it
could be me, but for that amount of money, they should have
sparkled.

regards
allan freilich


#5

Frank,

Agreed they appear to be GREAT!!.. and the talent is here to
figure how to build one!..

Patiet is no problem… the principles of physics are free
and there are no patients… if we do it ourselves!

The general way they are built are per motors and generators
… which are just the reverse of each other… in motors the
mag field is in rotor (I think), the housing has an AC field (Dis
stuff is hard to remember!)rotor mag field is produced by DC and
therefore doen’t atternate… permanent poles… the mag in the
field(housing is in the casing and is produced by AC which
swithes with the current… the rotor chases! NOW, GUESS U USE
A RHOSTAT TO CONTROL THE FIELD IN THE WINDING…

WELL!!! JUMP IN EVERYONE!!!..

So …I’m sure with only this info ,u would burn up the motor
so… …

Jim