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Old 08-26-2009, 12:35 AM   #1
RighteousFire
 
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So I recently found a Corona style mill from a local guy who doesnt have the love for home brewing anymore so I reap his leftovers.

I'm doing my second all grain soon, an imperial stout, and in preperation I tested my mill to see what kind of crush i can get.



I want to know what everyone thinks since it seems like corona crushes and roller crushes seem to look different.

Thanks.
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Old 08-26-2009, 12:52 AM   #2
JMSetzler
 
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In my limited experience, that crush looks a little coarse compared to the crushes I have made with my Barley Crusher. There also appear to be some that haven't been crushed at all...
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Old 08-26-2009, 01:16 AM   #3
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+1 that is very coarse. The wiki has a page for evaluating your crush. The corona example on the page happens to be mine.
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Old 08-26-2009, 02:22 AM   #4
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+1 on coarse. I use a corona mill too.

 
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Old 08-26-2009, 02:26 AM   #5
rod
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i use a corona knock-off and had to adjust with spacers to get a finer crush.
i don't think yours is fine enough yet to get good effeciency.
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Old 08-26-2009, 02:40 AM   #6
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Too course.

You'll want more flour than that. Plus I see a few whole kernels. I get a consistent 73-75% efficiency on my mill for average gravity beers. If I close the gap any I start getting slow sparges. Any wider and my efficiency drops. I think my numbers are pretty average for corona mills. Something to shoot for.
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Old 08-26-2009, 03:00 AM   #7
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What would happen if he ran a handful of that thru again? I've not used a corona mill..would it get more uneven or is it better to just play with the gap?
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Old 08-26-2009, 03:04 AM   #8
bradsul
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Running it through multiple times will help, but lessening the gap would be better overall. Basically crush until you're scared - then crush a little more.

If you start getting slow or stuck sparges, back it off a tiny bit and there you go. While you're working it out it's not a bad idea to keep some rice hulls around just in case.
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Old 08-26-2009, 04:29 AM   #9
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40 % of that grain is not crushed at all...MORE CRUSH! IMO there should be no uncrushed or whole grain at all.

 
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Old 08-26-2009, 04:10 PM   #10
IXVolt
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Here's what my crush looks like from my Corona. I'm getting 86% eff with this.



 
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