Instructables

Corona Mill Mods for All Grain Brewing

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The Corona Mill is a cheap alternative to the more expensive roller mills used to crush grains for brewing. Roller mills start at $100 and quickly go up in price. A Corona Mill can be had for as little a $20. With three modifications---two minor, one a little more intense---it can be as effective or even more effective at crushing grains for home brewing. The lower cost will let you save money on other things like good brewing kettles, jet burners, and pumps.
 
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Step 2: Another Minor Fix

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This is another tip that's been out there a long time. See the exposed gap where the bolt is. Fill that with washers. Most tips around the internet say two. I say four because of the next mod.
Dark Solar7 months ago

I'm a hair away from buying one but have been unable to locate a technical blow-apart and so still have reservations; the sardine key & wing nut combo outside of the bail--what do they do? Related to grind coarseness adjustment?

Also, working primarily with corn/sorghum malt; do you have a ball-park estimate for maximum burr-to-plate gap with available after step 3 mod?

dlewisa (author)  Dark Solar7 months ago
Yes the wingnut is for adjusting coarseness.You don't get the best or most even grind with this thing. A roller mill would be the best bet, but for the price this thing is good enough. It's been so long since I made a batch of beer I couldn't tell you what the gap is. Sorry.
wmatos68 dlewisa3 months ago

what do you mean when saying "If you have access to a mill and lathe you could make one hell of a grinder out of a corona mill"? Is there a better way?

dlewisa (author)  wmatos683 months ago

Geez, this is an old instructable and I haven't made an all-grain beer in a while. I can't remember what I meant. Probably it would be easier to cut the threads with the lathe. And I think the burr that you can remove wasn't very flat where the nut and rubber o-ring press against it so you could put it on a mill and level it out. It would give a more even gap for a consistent grind.

Kamsi1 year ago
Hello All! Can anybody tell me where I can purchase the Corona Mill in Vancouver Canada. Many thanks for your help!
dlewisa (author)  Kamsi1 year ago
Amazon.ca or www.midwestsupplies.com. You can also search for a victoria mill. Same thing.
Love the tip about making it motorized - very smart. :D
dlewisa (author)  jessyratfink2 years ago
Nothing better than making life easier. . . . And making alcohol cheaper.
I've been putting off the purchase of a mill for years now - I think you've just sold me on finally making the plunge:)

One question- it looks like you've got this locked down to just grinding for brewing. is it possible/what would it take to adjust the grind down to make flour for baking?
dlewisa (author)  BigCommieNat2 years ago
It does retain its functionality as a flour mill. All you do is adjust the burrs closer together.
I got one very similar looking to this. Mine has no top cover & the hopper is shorter but the grinding doesnt go much finer than meal before scraping the aluminum together & I hear thats not good to eat.
Cheap though. :)