My Ugly Junk- Corona Mill Station...

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balrog

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I made four mods to my Corona (thank you, The Knack) and have been using it for over a hundred batches since
1) Add the side washers as noted by @Mothman , previously by @Revvy
2) Filed the hub on which one plate rests to better "parallelize" the two plates
3) Used nail/bolt like in posts 73-5 to keep plate in place. Note that I did not jbweld/5minepoxy the shaft to the plate--just the bolt/nail
4) Bought the 13mm bolt to extend and use 13mm socket in drill to power

I did mount in bucket, hopper connection level with bucket top, and made Formerly-Apfelwein-Applejuice-Jug hopper and use a piece of posterboard over all to lessen dust. Forget eliminating it, fool's errand, strap a furnace filter to box fan and run it while you're milling.
 

forgetaboudit

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I made four mods to my Corona (thank you, The Knack) and have been using it for over a hundred batches since
1) Add the side washers as noted by @Mothman , previously by @Revvy
2) Filed the hub on which one plate rests to better "parallelize" the two plates
3) Used nail/bolt like in posts 73-5 to keep plate in place. Note that I did not jbweld/5minepoxy the shaft to the plate--just the bolt/nail
4) Bought the 13mm bolt to extend and use 13mm socket in drill to power

I did mount in bucket, hopper connection level with bucket top, and made Formerly-Apfelwein-Applejuice-Jug hopper and use a piece of posterboard over all to lessen dust. Forget eliminating it, fool's errand, strap a furnace filter to box fan and run it while you're milling.
Im still having image issues....
Ill try on my PC in a little while...
 

Oginme

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The images are all there in the post, so it may be that your app is set up to block images. This is often done to lower data rates and you may need to go into the settings to unlock them.
 

rac3850

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I've used my corona for about 4 brews, first three were great, then the 4th had real low efficiency. Also, it seemed cumbersome and slow as I only used it clamped to a table top with a pan underneath it. As far as the bad efficiency, I think it got out of adjustment and had a coarse crush.

The experience inspired me to look at getting a roller mill. Then I came across this thread and was convinced to give the corona another chance. I did the few mods noted in the thread (washers, cleaned up the auger and journals, finessed the cotter pin). Then I and put together this fugly set up.

I used the two bucket plan, with a drill driver board inserted between the buckets. The upper bucket has a 1 x 6 inside to mount the mill, using six screws through the bucket to hold it in place. On the outside of the bucket I made a couple of "ears" to hold it in place when inserted into the drill driver board (screwed to the bucket from the inside).

The drill driver board just has a coutout in which to insert the upper bucket, and it sits on top of the lower bucket. No mods to the bottom bucket. The three pieces loosely nest together. The leg was added to the drill driver board to resist tipping. Also added the 5 x 6 sheetmetal reducer for a bit more hopper capacity. I'm thinking of getting a 6 x 8 to add for even more capacity (~$8).

So far, all in about $33: $18 for the mill, $7 for two buckets, $7.50 for the duct hopper. All the rest was scrap laying around, and a beat up old Dewalt cordless that seems to have plenty of power to grind the grain -- though it takes two batteries to get through 12+ lbs.

On more thing I was thinking about -- cutting off the bench clamp and just bolting the mill to the 1 x 6 in the bucket using the upper flange of the clamp arrangement. This would allow the upper bucket to stand on its own straght up rather than tilted as the clamp does protrude below the bottom. Has anyone done this? I see two possible issues - one is it would be much more annoying to take the mill out of the bucket for cleaning, and maybe the second is it would weaken the base of the mill and possibly lead to a casting fracture??
 

rac3850

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That's a great idea. Unfortunately, I threw out the cut off bottom of my bucket. The milling discs are about 1/2 into the upper bucket, so maybe I won't get much grain thrown out - but if I do I could just cut up another bucket - they're cheap on sale.
 

hawkbox

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Yup, they are cheap enough, I found it made a hell of a mess without a lid of some type. My hopper is just an old plastic tube duct taped to the steel piece and is all kinds of janky but it works well enough.

Someday I'll buy a fancy mill, but this one has lasted me almost 3 years now and hundreds of pounds of grain.
 

lowtones84

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My "shroud" is literally any clean paper bag I have around with a slit cut in it, wrapped around the area with the plates and the open end going into a bucket. Works pretty well, actually!
 

NitrogenWidget

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my mill is deep enough into the bucket that I can put the lid on it and just have a hole for the hopper.
no dust.
though I'm just using one bucket right now.
Also, kids have an old picnic table they are too big for.
Think i'll cut a hole in it so the bucket sinks into the top.

It REALLY REALLY REALLY sucks if the bucket slips out of your hand while the drill is going.
the drill i'm using is an old steel encased jobber that puts holes in pressure treated 6x6's like butter and will take your hand off if the bit catches.
best $15 i spent on craigs list.
 

rac3850

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the drill i'm using is an old steel encased jobber that puts holes in pressure treated 6x6's like butter and will take your hand off if the bit catches.
best $15 i spent on craigs list.
I've got one of those too -- weighs about 25 lbs, runs about 200 or so RPM, has a curved saddle you can sit on it, plus two handles to hold on for dear life. Unstoppable torque. It was my grandfather's. I don't think I need it for the corona mill though.
 

NitrogenWidget

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I've got one of those too -- weighs about 25 lbs, runs about 200 or so RPM, has a curved saddle you can sit on it, plus two handles to hold on for dear life. Unstoppable torque. It was my grandfather's. I don't think I need it for the corona mill though.
well, that's too big for this purpose.

mines about 10lbs 3 amps and 400ish RPMs.



I use it cause it does the job nicely.
if I hold onto the bucket.

I have my crush very tight for biab.
regular drill starts smoking at 5 or 6 lbs of crushed grain and cordless goes dead.

I was going to get the more powerful hammer drill from harbor freight but this works.
 

QTikiBrew

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I used the two bucket plan, with a drill driver board inserted between the buckets. The upper bucket has a 1 x 6 inside to mount the mill, using six screws through the bucket to hold it in place. On the outside of the bucket I made a couple of "ears" to hold it in place when inserted into the drill driver board (screwed to the bucket from the inside).
rac3850 - is it possible to get a photo top-down on your upper bucket, to see how that 1x6 is mounted, or a closeup of the screw points? I'm pulling the trigger, so to speak, on a corona (multi-purpose for me - crushing, dehulling, and grinding for flour), but I want to come up with a good plan for a set up, and yours seems up my alley.

Thanks!
 

QTikiBrew

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QTikiBrew,

Hope these pictures of the mill mounting bucket help, one from the top, one from the bottom and one from the side. if not just reply with any other views you need.
Ok, so, looking at this, in theory I could just cut holes in the side of the bucket to slide a longer 1x6 through, pulling double duty as the mill mount and ears, yes? Of course, the holes would need to be slightly longer than the board is wide, to account for curvature . . .
 

rac3850

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Ok, so, looking at this, in theory I could just cut holes in the side of the bucket to slide a longer 1x6 through, pulling double duty as the mill mount and ears, yes? Of course, the holes would need to be slightly longer than the board is wide, to account for curvature . . .
Yep, I think that would work too. Definitely more elegant from a design perspective, fewer parts. I think the board would need to be wide enough so that if the mill shifted towards one side or the other of the bucket, the opposite board end would not dis-engage (i.e., slip through and fall inside the bucket).
 

QTikiBrew

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Yep, I think that would work too. Definitely more elegant from a design perspective, fewer parts. I think the board would need to be wide enough so that if the mill shifted towards one side or the other of the bucket, the opposite board end would not dis-engage (i.e., slip through and fall inside the bucket).
Right, although a spare c-clamp could help with that.

I've got time on my hands unemployed and waiting to restart grad school in the fall, so I'm focusing on putting together my brewery setup/stuff before small brewing assistant who still needs minimum 10 years aging before usefulness arrives ca 21 November.

Between brewing and running the garden . . . did I mention I have 459 sqft of winter barley growing in a suburban backyard, and I'm trying to consider how to build a hops trellis . . .
 

DBhomebrew

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I'm uploading some pictures trying to show how cutting up one bucket to hold the Corona Grinder and using the bottom half to create Cover Shield...I'm able to interchange the bottom collection buckets, (these are unmolested buckets, and just change out) as these are ordinary 5 gallon stackable buckets. :) a bucket will hold roughly 20 lbs. of milled grains (depending on how fine they are ground) It's easy to just swap out the collection buckets when filled
View attachment 548812 View attachment 548813 View attachment 548814 View attachment 548815
@Stake, I really liked your bucket design. Copied it pretty much straight up.

20200710_154157.jpg


Pin adjusted for rotor plate articulation. Washer stack added at bracket attachment for stability.

20200710_154308.jpg


Milled a small batch of grain for BIAB. Rather consistent grind, plenty of flour. I'm happy with it. About $40 all told.

20200710_154118.jpg
 

Konstantianus

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Finished my Ugly Junk build and am very happy with how it turned out. All told the bill is around $40 and my grind is very fine... perhaps too fine?

We'll find out what the efficiency is after I do a test run with 1 Lb. of Pale Ale malt.
20200711_194647.jpg
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20200711_194723.jpg
 

DBhomebrew

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@Stake, I really liked your bucket design. Copied it pretty much straight up.

View attachment 688855

Pin adjusted for rotor plate articulation. Washer stack added at bracket attachment for stability.

View attachment 688856

Milled a small batch of grain for BIAB. Rather consistent grind, plenty of flour. I'm happy with it. About $40 all told.

View attachment 688857
With this mill set up as it is, no sparge, no twist, no squeeze BIAB, 1.040: 84% mash efficiency.
 

QTikiBrew

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Finally got around to putting my Victoria mill together and figuring out how I was going to mount it.

Did it pretty much like DBhomebrew did his, with a few minor differences:

I used a homer bucket for the main body,and I cut out two rectangular holes in the side to side the board I'm using to mount the mill on; the board is just a piece of scrap from the last owner of the house

Then I cut the bucket in two to use the bottom half as a shroud

Cut a hole in that for the bottom collar of the hopper to fit through

Looked around my basement for something that could serve as an extended hopper - nixed the scrap round duct portions that are hanging in various place from where the last owner rigged his own overhead dust collection system, who knows what they've got in them . . .

And them I realized - the opening of my fermonster fits into the top of the hopper!

I'm not going to cut the bottom off, I'll just dump the whole grains into that, and tip it over onto the top of the mill.

I haven't yet purchased a bolt to serve as a drive shaft with one of my drills, I'm going to see how I do with my first recipe kit from MB when it arrives (will be my first time doing a 5 gallon AG batch, first time milling my own grain).

No pictures yet.
 

Jhedrick83

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Time to necro this thread since it hopefully just saved me a ton of money. Nothing innovative here and I’ll probably tweak it more later but here’s my Ugly Junk:
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Doing BIAB with this. Thoughts?
 

DBhomebrew

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DBhomebrew

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did that level of crush look good
Looks pretty good to me. You can see mine in post #2145. I've opened it up some since then, maybe a 1/4 turn. Very small hit in efficiency barely 5%, but easier doughing in, no dough balls.

I do miss the smaller hull pieces when it comes to my spent grain bread. Oh, well. Beer first.
 

NitrogenWidget

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3rd year on my corona in a bucket mill.
I added a 6" to 8" galvanized heater pipe adaptor to make an easier time of dumping grain into it from my 5 gallon grain bucket.
it can hold 10lbs now.

I need to build a table to hold it and the drill so i can just let it grind away instead of holding it for 5 whole minutes. :)
 
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