Seabee John

Recipes 

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
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
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Misplaced_Canuck

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Personally, I wouldn't run it much faster than 250RPM.

M_C

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"Rogue is the IBM of beers"

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Originally Posted by Unknown Carbonic bite? Is that like the bubonic plague?

TXCurtis

Recipes 

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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If I have to bend over to start the job, so does she. - JohnnyO

Nothing to worry about, but really hard to get enough for a whole bowl of cereal. - bull8042

wildwest450

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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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michaeltrego

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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!

sco999

Recipes 

I run my Barley Crusher @ 400 rpm. no problems yet.

SDMBREW

Recipes 

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.

Seabee John

Recipes 

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
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
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rerobb

Recipes 

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!

Seabee John

Recipes 

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
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
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