Corona mill usable? - Home Brew Forums
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Old 01-25-2007, 01:15 PM   #1
Bobby_M
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Is the corona mill viable at all or is it really a budget half-ass mill for our cracking purposes?


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Old 01-25-2007, 03:04 PM   #2
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It's not top-of-the-line or anything, but it's the only mill I've used and it works fine as long as you continuously monitor the crushed grain's consistency. It kind of loosens itself as you go and you can vary from over-crushed to under-crushed if you aren't careful. I've used it so much though that I have it down to a science. What botheres me more now is that it is kind of "messy" - the physical layout of the thing makes it harder than it should be to easily collect large amounts of crushed grain. I crush into a small mixing bowl and dump it our into a larger container when it fills up.

Put it this way, it was cheap and it works good enough to not replace (at least until i have 10 more cornies, a larger lagering fridge, a conical or five, a brew sculpture, a propane burner, etc, etc, etc. )



 
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Old 01-25-2007, 04:01 PM   #3
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It works, Mine spits out about 60% efficiency for me. Your better off with one of them pricey phill mill's or the krankenstein.
I get my grain at wholesale prices, so I can afford to throw more grain at my beers to attain the desired gravity.

 
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Old 01-25-2007, 04:07 PM   #4

I use the Porkert mill which is a variation on the corona style. I really like it (partially because it was a Christmas present, free is good!). Fiery Sword is right about the mess though. I made a 2x4 frame to sit on top of a wine juice bucket and crush into that. I also crush outside because it's pretty dusty.

I ended up adding some sides to the frame to come up slightly above the height of the bottom of the disc. This directs any of the grains that want to come out sideways down into the bucket. I power mine with a drill (on LOW speed) and it does a fantastic job. I've only done 2 AG brews so far but I managed to get 73% and 76% efficiency without any tannin extraction that I've been able to detect. I used it for a lot of partial mashing before that and had equal success.

That said if I had bought one myself I think I would have gone for a roller-style malt mill instead.

Brad

 
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Old 01-25-2007, 11:33 PM   #5
boo boo
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Quote:
Originally Posted by bradsul
I use the Porkert mill which is a variation on the corona style. I really like it (partially because it was a Christmas present, free is good!). Fiery Sword is right about the mess though. I made a 2x4 frame to sit on top of a wine juice bucket and crush into that. I also crush outside because it's pretty dusty.
Brad
I use a porkert also and find nothing wrong with it. I crush by hand and for 12 Lbs or so don't find the exercise hard. I made a funnel for the grain to fall into my bucket. Some pics.
http://i15.photobucket.com/albums/a3...er/hops009.jpg
http://i15.photobucket.com/albums/a3...er/hops008.jpg
http://i15.photobucket.com/albums/a3...er/hops006.jpg I have even been known to con my better half into "helping" me crush a pound or so.
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Old 01-26-2007, 12:03 AM   #6
Onescalerguy
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booboo
My Porkert is way different from yours but it does the same thing.I've made a few posts about it on a couple different threads.I adapted it to a corded drill and go full speed.I like it alot.

Bobby_M
If you can,adapt your Corona to a drill.These little mills suck if you brew a lot and have to crank by hand,as I found out(150# of grain later).

Cheers

 
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Old 01-26-2007, 02:21 AM   #7

Quote:
Originally Posted by Onescalerguy
If you can,adapt your Corona to a drill.These little mills suck if you brew a lot and have to crank by hand,as I found out(150# of grain later).
I agree. I did 3KG of grain for a partial mash with the hand crank and decided that was enough. With the drill it takes less than a minute per KG.

 
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Old 01-26-2007, 02:30 AM   #8
FlyGuy
 
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Does anyone have instructions and/or photos of the drill mod? I wouldn't mind trying that. Thanks!

 
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Old 01-26-2007, 03:42 AM   #9
Onescalerguy
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Just rig it up,McGyver style.I had to drill a hole in the shaft just in front of the washer(spacer?)and put a pin through it to maintain the proper distance between the plates.I did away with the crank and chuck the shaft end into the drill.It was chewing up the shaft threads so i put a couple wraps of duct tape on it.I might need to use the crank again sometime so I don't want to ruin the threads.
Cheers

 
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Old 01-26-2007, 03:50 AM   #10

Quote:
Originally Posted by FlyGuy
Does anyone have instructions and/or photos of the drill mod? I wouldn't mind trying that. Thanks!
I don't have the Corona but here is what I did for the Porkert if anyone else is interested. This method also allows you to use the handle if you need to.

(1) M8 1.25 45MM bolt
(1) M8 1.25 nut

I cut the hex head off the bolt and then used a grinder to make 2cm of one end of the bolt 3 sided. Thread the nut onto the bolt far enough that you can then screw the bolt into the spindle for the handle, then use the nut to lock it on.

Took about 5 minutes include 'adjusting' the accuracy of my 3 sided grind with a hammer. I imagine the Corona would be basically the same (though different thread size I would imagine).

Brad



 
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