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Old 09-08-2010, 07:19 AM   #1
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Default DIY Grain Mill

I am going to try to build my mill as Yuri does in this thread.

http://www.homebrewtalk.com/f11/diy-...58/index7.html


My Question is this, Is .045 the normal distance most people are using between rollers. I ask because if this is the case I am not going to build in adjustability which would make the project far easier. Thx in advance,,,Dave

For those that are tool challenged thats roughly the thickness of your Credit Card at the raised numbers.

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Old 09-08-2010, 05:56 PM   #2
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I think most are closer to .039...that's the factory setting of a Barley Crusher, and mine is currently closer to .035

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Old 09-08-2010, 06:10 PM   #3
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I think most are closer to .039...that's the factory setting of a Barley Crusher, and mine is currently closer to .035
I have the Barley Crusher too, and I think .039 is the default setting. I'm happy with the crush. I get around 75% efficiency with this crush and a single infusion mash with a batch sparge.
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Old 09-08-2010, 06:31 PM   #4
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I think I'm around .036, but I adjusted by looking at the crush, and never really measured.

I built mine adjustable. It was not nearly as easy as building it fixed, but at least now I can space it for whatever crush I want, or whatever grain. Who knows if I'll ever want to change it though.

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Old 09-08-2010, 07:39 PM   #5
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I crush at 0.025" (25 mils, I far prefer mils) and routinely get 90% efficiency. I also get the occasional stuck sparge too

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Old 09-09-2010, 01:34 AM   #6
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I think I'm around .036, but I adjusted by looking at the crush, and never really measured.

I built mine adjustable. It was not nearly as easy as building it fixed, but at least now I can space it for whatever crush I want, or whatever grain. Who knows if I'll ever want to change it though.
Yeah my thought process in this is,,,does anyone really ever change adjustment for different grains? Or is everyone mostly just finding the magic number that'll work for all of them without sticking sparges. Sounds like .036 is a good number but more input would help everyone I think to increase efficiency with less problems.
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Old 09-09-2010, 01:41 PM   #7
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A lot depends on your system. I would hate to build it and find out that the crush was too fine and I kept getting stuck sparges. Then I'd have to lathe down the roller and reknurl it hoping to get it right.

Or worse, the gap is too much and you get ****ty efficiency and no easy way of resetting the gap.

Building the mill to be adjustable allows you to make simple adjustments to match your system. Yes it's more complicated to build. But, you can make up for it by having the ability to tweak as needed.

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Old 09-09-2010, 02:43 PM   #8
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Quote:
Originally Posted by PDawg View Post
Yeah my thought process in this is,,,does anyone really ever change adjustment for different grains? Or is everyone mostly just finding the magic number that'll work for all of them without sticking sparges. Sounds like .036 is a good number but more input would help everyone I think to increase efficiency with less problems.
Yep, I adjust my mill every time I use it. Grain varies considerably in size and for some, a finer crush is desirable as with wheat for instance. I have a Phil Mill I (unfortunately no longer in production) which is adjustable while running. I never have to measure the gap as I can simply inspect the grist visually and make adjustments on the fly with a turn of a thumb screw. No need to fuss with feeler gauges and eccentric bushings. I would consider that to be a major PIA and more than likely I would just try to find an acceptable gap and leave it at that with any other mill. You can achieve any efficiency you desire if you know how to manipulate the numbers properly.
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Old 09-09-2010, 03:13 PM   #9
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When looking into designs to use for my own, I only saw the eccentric type. I'd be very interested in seeing a Phil Mill and see how easy it would be to build one of those. If it doesn't look to difficult, I'll simply build a new mill and pass my old one down to some new brewer who wants to go AG.

Now that I have more experience using the CNC Mill and Lathe, I don't think it would be too difficult to build a new one. (If I can find scrap stock).

EDIT: Just looked at a Phil Mill and notice that it is a single roller mill. Not the design I was looking to use. I am considering using a slide and adjustment screw for a double roller mill the next time, IF I decide to build another. It takes a bit of time when you only can play with the CNC equipment at break or after hours.

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Old 09-09-2010, 03:40 PM   #10
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Yeah in looking at my drawing today I decided to make it adjustable,,,I like the adjustment knob as well. I am in the same boat tho,,,dunno if I am going to fing the piece of scrap I need to do it. Think I will play around on Sketchup with the knob idea.

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