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Ball mill


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#1 Mike71

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Posted 09 June 2019 - 11:38 AM

So i have been using a harbor freight ball mill
And have come to the conclusion these things are horrible
I got a washing machine drive unit im thinkinh of makin6a mill out of
Any ideas to help me kick this project off
Thoughts????
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#2 Mike71

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Posted 09 June 2019 - 11:40 AM

Pic of the drive

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#3 Mumbles

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Posted 13 June 2019 - 11:37 PM

Open coil motors always worry me for mills. They'll work though. TEFC is always my preference, though still not totally explosion proof.
Just so you guys quit asking, here is the link to the old forum. http://www.xsorbit2....forum/index.cgi

The sky is my canvas, and I have 2,113 pounds of powdered paint in the workshop.

#4 PyroPadawan

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Posted 21 June 2019 - 04:07 AM

I’m with Mumbles on this one, Mike. They’re great, continuous use motors, but being open coil should ask for some concern on your part. Now.....there are ways to protect it. Ie. mount in its own box, couple PC fans pulling filtered (fish tank water filter in a DIY housing) air, locate a far distance from rollers, run v-belt ALwAYS. Bobs your uncle.

#5 BrentCle

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Posted 09 July 2020 - 04:41 PM

Hi, I am new to these forums and am looking for a ball mil or DIY ball mill. My purposes are probably different than most people on these forums as I'm looking to use it to grind down MCHA which is freeze dried Bovine powder. I am using it in a DIY tooth powder. My question is, I am looking for advice on something that would be  food safe. I am sorry if it is wrong here to ask about different applications than pyrotechnics, but this forum seems to be of the very few that talks about ball mills. The reason I am looking for a ball mill, is because I need the powder to be around 75 microns, preferably less as much as possible. I have looked at food grade options, but all I could find are laboratory jars for planetary ball mils for hundreds of dollars.

Any advice on option would be much appreciated.



#6 snapper

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Posted 09 July 2020 - 05:44 PM

a blade style grinder like a bullet might be your only cheap food safe answer,  even a decent countertop blender will run you a few hundred



#7 Mumbles

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Posted 09 July 2020 - 10:08 PM

The roller portion can be made from whatever you have around.  A Harbor Freight Rock Tumbler might do the trick and not cost a ton of money.  Stainless steel media would probably work the best for your applications here.  I think the trickiest part is going to be finding a suitable food grade milling jar.  My first thought is a Curtec drum or bottle, though they're on the larger side generally.  They're reported to be food safe, and are a little thicker than most of my other thoughts.  They wont last forever though.  They're also sort of hard to get in less than case quantities, though I included a link below.  You can find them used, but I'd be wary about that for your application.  These would be far too big for the aforementioned harbor freight tumbler as well.

 

https://www.curtec.c...wide-neck-drums

 

https://www.amazon.c...L/dp/B00HFU5I4G


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Just so you guys quit asking, here is the link to the old forum. http://www.xsorbit2....forum/index.cgi

The sky is my canvas, and I have 2,113 pounds of powdered paint in the workshop.

#8 Arthur

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Posted 10 July 2020 - 12:33 AM

First, please consider the regulations in your country/state/county. This could be a food product or a medical product which could change drastically the cost of approved machinery for manufacturing.

 

More you need to consider what material will be abraded from your drum and media and consider what the effect of part per million contamination may be and how to test for it.



#9 BrentCle

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Posted 12 July 2020 - 06:27 AM

I think I found an option https://www1.ceramic...ll-accessories/ not a bad price. Just have to make a roller that will work with it or find a cheaper option to buy than the ones they make. $1000+... Do you think a harbor freight would run the 1 litre of these? Also would it need a cover over the ceramic so it doesn't slip or would it grip it alright.


Edited by BrentCle, 12 July 2020 - 06:35 AM.


#10 dagabu

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Posted 29 July 2020 - 05:13 PM

A great milling tumbler: https://www.amazon.c...y/dp/B001NDRT2K


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