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Old 05-15-2012, 08:32 PM   #1
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Default Grain Mill Gaps

What are the "preferred" gaps on a 3 roller grain mill?

Also... Are the gaps set before or after knurling the rollers?


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Old 05-16-2012, 07:01 PM   #2
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Anyone?

I found some 1-3/4 round stock in the scrap pile. Not sure if it is hardened or not. Can hardened stock be knurled?


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Old 05-16-2012, 07:29 PM   #3
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monster mill(mm2) has their first gap around .60", crankenstein(3e) uses .70". The second gap is adjustable on both, 0" to .65" on MM, .1" to .7" for CS.

For harder material you would need more specialized (harder) tools. If this is just a one time project it's probably not worth buying cobalt, and would be easier/cheaper just to put a different finish on it. Maybe sand blast/steel bead it or dremel some grooves into it.
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Old 05-16-2012, 10:59 PM   #4
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The MM 3 roller mills are recommended at .037 - .055". I am running mine at 0.042" measured at the knurling with a fit that allows me to freely slide the gapper across the whole length of the rollers, I had it with a tight fit at 0.040" and I had to run to the LHBS for some rice hulls. I will probably adjust mine down a little more but I am getting about 75% efficiency now.
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Old 05-16-2012, 11:53 PM   #5
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Are you gaping with feeler gauges?
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Old 05-17-2012, 01:06 AM   #6
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Quote:
Originally Posted by Huaco
Are you gaping with feeler gauges?
I think that's what she said...
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Old 05-17-2012, 02:19 AM   #7
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Quote:
Originally Posted by Huaco View Post
Are you gaping with feeler gauges?
yes the 0.042" that I am currently using was done properly with a feeler gauge previously I tried a 0.040" but had it tight and it was way too fine a crush. dough balls formed instantly and too a great extent, what I thought was 0.040" was probably in the 0.03's]
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Old 05-17-2012, 02:40 AM   #8
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I use .030 with my BC. If I had a MM3 I'd set it to .024.
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Old 05-17-2012, 03:04 AM   #9
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.035 on my JSP Malt Mill. Feeler gauge.

[I'm sorry, I didn't read the OP fully. My mill is a 2 roller]
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Old 05-17-2012, 03:07 AM   #10
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So these gaps are obviously set tot the top of the knurl, right?


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