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02-01-2011, 04:29 PM
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#1
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Swing the BIG hammer
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Location: Minnesota
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What RPM do you run your grain mill at?
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I just was gifted a 5 HP 3450 RPM motor. I've got a 2" Drive Pulley connected to a 8" Driven pully on a mandrel, which I'll attach to the barley crusher via coupling. The resulting rpm is 862.5 or a .25 reduction
How fast is too fast? I was hoping to keep with the 8", but if I need to, I'll start looking for a 10 or 12"
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North Saint Paul Brewshack
Quote:
Originally Posted by jmendez29
Mom was right. Never argue with an idiot. They just drag you down to their level and beat you with experience.
Where's my beer. I know I left it around here somewhere.....
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Kegged/Drinking:Nihilistic Integrity - Black IPA, #1 BIAB pale ale, Bells Two Hearted - yes a keg of the real stuff
Kegged/Conditioning:Wally N Seans Braggot, Emerald Eyes - Irish Red, Atomic Tsunami - brown
Primary:empty
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02-01-2011, 04:32 PM
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#2
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Join Date: Jan 2011
Location: NE Columbia SC - Formerly, Montreal Canada
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Personally, I wouldn't run it much faster than 250RPM.
M_C
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Originally Posted by Misplaced_Canuck
Carbonic bite? Is that like the bubonic plague?
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Originally Posted by Misplaced_Canuck
Brew in the bedroom, scr*w in the kitchen. I like the idea!
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02-01-2011, 04:41 PM
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#3
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As useful as camelflauge
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850 is a bit fast. Shoot for under 500 rpms.
I crush with a monster mill hooked up to an ancient 500 rpm drill. Crush was acceptable at full speed, its even better with the drill hooked up to a variac (reduces voltage) set to 35%.
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Damn, Crash is one hard-headed mofo. - Shecky
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02-01-2011, 05:38 PM
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#4
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Join Date: Dec 2007
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The barley crusher site say's at 500 rpm it yields 6lbs per minute. I wouldn't go any faster than that.
_
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02-01-2011, 06:09 PM
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#5
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Location: Amherst, NH
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I used a 1725 RPM dryer motor with my MaltMill. With a 10" sheave on the mill and a 1.5" sheave on the motor, I got the RPM's down to approx 190, and it runs great with a good crush. I would try to keep your RPMs below 300 to avoid pulverizing the grain.
Here is a good calculator to determine resulting RPMs:
http://www.csgnetwork.com/pulleybeltcalc.html
Good luck! |
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02-01-2011, 06:18 PM
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#6
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Join Date: Sep 2010
Location: North of Nowhere
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I run my Barley Crusher @ 400 rpm. no problems yet.
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02-01-2011, 06:30 PM
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#7
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Join Date: Jul 2010
Location: Windsor
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I affixed an old belt driven variable speed drill press to run my malt mill. I found running 500 - 600 rpm sufficient. I have run it up to 1700rpm and the quality of the crush was the same the only fear I have is prematurely ruining the bronze bushings.
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02-02-2011, 12:43 AM
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#8
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Swing the BIG hammer
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Join Date: Oct 2007
Location: Minnesota
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Thanks for all the input. It looks as though I'll have to switch up to the 12 inch pulley in order to get it where it needs to be.
__________________
North Saint Paul Brewshack
Quote:
Originally Posted by jmendez29
Mom was right. Never argue with an idiot. They just drag you down to their level and beat you with experience.
Where's my beer. I know I left it around here somewhere.....
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Kegged/Drinking:Nihilistic Integrity - Black IPA, #1 BIAB pale ale, Bells Two Hearted - yes a keg of the real stuff
Kegged/Conditioning:Wally N Seans Braggot, Emerald Eyes - Irish Red, Atomic Tsunami - brown
Primary:empty
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02-02-2011, 02:48 AM
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#9
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Join Date: Oct 2010
Location: Grove City Ohio
Posts: 48
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Check McMaster Carr for pullies, they seem to have everything.
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I'm not a beer snob, I just like good beer!
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02-02-2011, 05:11 AM
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#10
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Swing the BIG hammer
Feedback Score: 0 reviews
Join Date: Oct 2007
Location: Minnesota
Posts: 2,445
Liked 21 Times on 18 Posts
Likes Given: 17
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I found a 12" on amazon for 27 bucks... it's the largest I could find with a 5/8" shaft arbor. According to the calculator that should get me down to 578 RPM. That's a little more than I was hoping for, but I think it will do. The only down side I can think of at that RPM would be shredding husks... anything I'm missing?
__________________
North Saint Paul Brewshack
Quote:
Originally Posted by jmendez29
Mom was right. Never argue with an idiot. They just drag you down to their level and beat you with experience.
Where's my beer. I know I left it around here somewhere.....
|
Kegged/Drinking:Nihilistic Integrity - Black IPA, #1 BIAB pale ale, Bells Two Hearted - yes a keg of the real stuff
Kegged/Conditioning:Wally N Seans Braggot, Emerald Eyes - Irish Red, Atomic Tsunami - brown
Primary:empty
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