Sciencemadness Discussion Board - Where to buy cheap ball mill or at least continuous duty motor & media?

Where to buy cheap ball mill or at least continuous duty motor & media?

Miho - 31-1-2012 at 00:29

Hello all.

I'm looking for cheap classical ball mill looks like this one, all assembled.

I have Al2O3 balls 13 & 20 mm they was really cheap but there aren't smaller dia's. Where to buy 4 - 9 mm dia ball less 100$ per kilo?

Chemical resisted jar I have also.

But it's very difficult to me to find in Internet cheap continuous duty motor that consume 220/110 VAC. I've seek in ebay scooter motor like this one

but it 24v and I don't know where can I buy transformer from 220 VAC to 24 VDC.

Please help me in my search.

Pulverulescent - 31-1-2012 at 01:48

I bought a small rocktumbler for BP years ago ─ the 'belt' was a rubber ring, the 'motor' wouldn't even turn 100 AH lead balls!
I put a WM pump motor on it and was able to get an ounce or two of fairly fast BP on each three-day run!
I'm now trying to convert an old bench-drill using an old printing-press roller as driver!
But other shit keeps getting in the way, so it's going to take a while?

P

Miho - 31-1-2012 at 08:22

Thank you for caution about weak motor.
Drills and saw has powerful motors but not continuous duty. I am doubt that drill may run over 3 days.

GreenD - 31-1-2012 at 08:26

pulv - could you document your work on this. I'm interested.

Pulverulescent - 31-1-2012 at 16:31

Well yeah, I've made great progress on it in the last few yonks . . .
I'll post pictures, anon!

P

Pulverulescent - 1-2-2012 at 01:12

Quote:

I am doubt that drill may run over 3 days.

If you're using a drill-motor it should have a thermal cut-out and for continuous running a heat-sink is a must!
One can be made from heavy aluminium sheet cut with a good snips and bolted on tight!
If contact is poor, any voids can be filled with thermal paste!
That, of course, means the motor's drilling days are over . . .

P

bquirky - 1-2-2012 at 06:07

ive heard lead fishing weights make good millballs. there are allso ball bearings and ive heard of steel nuts being used.

try a cheap 12v drill running at about 3-5v as long as it isn't extremely loaded it should run indefinitely without any trouble at all

after all your not running your mill at 1000's of rpms just enough to get the meda churning say 60rpm

Pulverulescent - 2-2-2012 at 07:42

As promised, a picture of the great strides I've made, already?
The observant, though, may note that some further assembly is required!

P

TheChemINC - 23-2-2012 at 20:07

i bought a 6lb (2 drums) one from harbor freight for 50 dollars. it works great! i use 1/2 inch hardened lead media to mill black powder and such....

Pulverulescent - 24-2-2012 at 05:32

Can you post pictures of your set-up?
Some of us would be most interested . . .

P

AirCowPeaCock - 24-2-2012 at 09:55

Quote: Originally posted by Pulverulescent

I bought a small rocktumbler for BP years ago ─ the 'belt' was a rubber ring, the 'motor' wouldn't even turn 100 AH lead balls!
I put a WM pump motor on it and was able to get an ounce or two of fairly fast BP on each three-day run!
I'm now trying to convert an old bench-drill using an old printing-press roller as driver!
But other shit keeps getting in the way, so it's going to take a while?

P

If you have any efficiency at all, three days will make your black powder worse than 2 days worse than one. A typical milling session is 3 hours, not three days. 4-6 hours is considered the norm for most amateurs. I (and many other pyros) laugh when people speak of 24 hour millings. But when its by three days it just become sad.

[Edited on 2-24-2012 by AirCowPeaCock]

Pulverulescent - 24-2-2012 at 11:36

Quote:

A typical milling session is 3 hours, not three days.

I know that but I haven't, unfortunately, quite gotten around to procuring myself that wheel-mill with the 10 ton wheels just yet! (

)

P

Neil - 24-2-2012 at 12:05

To the OP - tread mills come with a DC motor and a PWM controller.

Ebay has everything