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Old 03-19-2009, 05:37 PM   #1
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Default DIY Grain Mill - what rollers?

What qualities do you look for in rollers for a grain mill ??
I'd like to build my own little mill powered by my electric drill, but I'm not sure what I should consider using for rollers. What diameter should they be?

While I was at the store the other day, I saw rolling pins on sale for $5 each, and I thought that 2 of those might make for some cheap rollers.

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Old 03-19-2009, 05:51 PM   #2
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I really like the quality and price of the Monster Mills. I built my mill with those as the rollers and have put hundreds and hundreds of pounds of grain through it with 0 problems. The rollers are long and thick...just how I like them.

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Old 03-19-2009, 05:56 PM   #3
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This is also next on my project list. I'll be watching this thread too. I wondered if anyone has tried large diameter pvc or would that not hold up.

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Old 03-19-2009, 06:18 PM   #4
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Rollin pins would work if they were made of steel. Wooden rolling pins would become pitted in seconds.

The rollers I used in mine were hardened steel, but only hardened because that was what was laying around in the scrap bin. Only the outside was hardened, but it made knurling the surface difficult on my equipment.

PVC would not work either IMO. Perhaps an old aluminum baseball bat?? I'm not sure hoe thick they are, but you'd need something pretty hard to survive the pressure.

Some people have used a pasta mill successfully. I think a google search would reveal some more information.

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Old 03-19-2009, 06:23 PM   #5
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Quote:
Originally Posted by Homercidal View Post
Rollin pins would work if they were made of steel. Wooden rolling pins would become pitted in seconds.
What about marble rolling pins?
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Old 03-19-2009, 06:41 PM   #6
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I have heard of people using concrete poured into tubes with your shaft in place. Problem was they had to be very large diameter to squish without the grain sliding and making the concrete slick, rendering it useless. If one were to find a way to texture the inside of your mold you could make it work, or make larger diameter rollers (think like a pitching machine) which are actually supposed to be a better way to smash. The larger the roller diameter the better the crush as it really smashes it rather than shredding it like knurled rollers do. I own a Crankandstein (now Monster Mill) and I love it, but one day I will make a large one. Machining anything accurately on the normal DIY scale is going to be difficult to the layman. The rollors you can order have that already accomplished, plus the mills come with bearing that will extend the life of your mill past anything you could possibly build. I bought my mill and build the hopper and everything else and am very happy, but keep looking and post if you build something. I love DIY and I machined for a little while so my mind works very complicated sometimes, lol.

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Old 03-20-2009, 01:58 AM   #7
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Quote:
Originally Posted by Brewer_Steve View Post
What about marble rolling pins?
You might be on to something there, might be worth a try.
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Old 03-20-2009, 02:03 AM   #8
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Marble rolling pins are likely to be very difficult to use and potentially very expensive.

I've had great success with aluminum round bar. 2" is the minimum diameter to consider.

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Old 03-20-2009, 02:25 AM   #9
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Quote:
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Marble rolling pins are likely to be very difficult to use and potentially very expensive.

I've had great success with aluminum round bar. 2" is the minimum diameter to consider.
Do you still knurl the aluminum or cut a diamond pattern 16 TPI in the round bar using a cutter?
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Old 03-20-2009, 02:29 AM   #10
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I cut a medium knurl in it.

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