Grinder or mill operating speeds.

[Tony Leonard]

I was wondering what is the best RPM to operate a stone mill like the one I own pictured in the link that I have posted below. Also, what about a burr mill??? Are the speeds different between to two??? My outfit has roughly the same size pulley on the engine as it does on the stone mill so you basically are running a 1 to 1 ratio. If I operate this engine at 200-300 rpm's, will this be fast enough to grind corn???

Any help or comments would be appreciated. Thanks.


http://www.smokstak.com/forum/attach...achmentid=3900

[RHudson]

Very nice mill. Who makes it.

My Williams book (stone mill, wooden frame) has:

12 inch stones, 4-5 hp, 1000rpm
16 inch stones, 6-8hp, 800 rpm
20 inch stones, 8-10 hp, 700 rpm

those are production numbers, i don't think it would make any difference to run slower, unless the mill would have problems throwing out the flour at slower speeds.

[Jebaroni]

RHudson is about right. We ran a 24" meadows mill and the manual suggested about 450-600 rpms. We had run it pretty slow at times and pretty fast at times too. If you run it slower, make sure that it's not feeding the grain in as fast. Plus, if you do it that way, you can make your demonstrational grinding last longer so more people can see it. Shouldn't be any difference between stones and steel burrs as far as grinding speed. Just make sure that none of the stones/burrs touch each other.

Jeb

[Tony Leonard]

Thanks for the information. I feel a little better now knowing that maybe I can grind some corn even at this slower operating speed.

I had an earlier post on this board concerning this mill with some other pictures and more information.

I will post a link to this earlier post below for any that might be interested.

http://www.smokstak.com/forum/showthread.php?t=23647

[Keith Smigle]

Keep in mind that as the mill speed slows down, so does your shaker speed on a Williams or Meadows mill. This could cause a problem with the sieve operating properly.

[Tooldie]

I was given a Mill just like yours last May by an older man that has maculer degeneration, in other words he was going blind. He wanted it to go to someone that would take care of it and show it at our showgrounds. It is almost the same as yours but the stone adjustment is oppisite,mine the standing stone moves to the running stone, where your looks as the running stone is adjusted to the set standing stone. Your adustment is outside your belt pulley, my adjustment is by way of a hand wheel on the crossbar that holds the standing stone in the mill. My colors are different but the complete mill is the same. Chuck

[dollystormy]

I operate a 20" Meadows. Stamped on the side of the mill it said, "700 RPM'S MAX.

I discussed this with an eighty plus year old miller after talking to Meadows. He said,"Lower the speed untill you meal spout clogges up then increase it 50 RPM'S too fast and it will scorch the meal.

I now run my mill at 475 RPM'S. I grind USDA approved corn for human consumption at festivals. All proceeds from corn meal sales goes to our granddaughters (age 12) college fund.