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-   -   Motorized Malt Mill, Both Rollers Driven? (http://www.homebrewtalk.com/f51/motorized-malt-mill-both-rollers-driven-122932/)

msheraw 06-08-2009 02:39 PM

Motorized Malt Mill, Both Rollers Driven?
 
I think we all agree a motorized malt mill can be somewhat expensive. I could really use advice / insight as to if it is necessary to have both rollers driven?

Could you save some money and just go with JSP with the fixed single drive motor? Is the gear drive really necessary?

:tank:

Tonedef131 06-08-2009 02:42 PM

Not at all, I think driving both of rollers would be complete overkill. I built my mill out of Monster Mill rollers, an old dryer motor and sheaves and a belt from grainer and I had about $150 into it when all said and done. That is no more expensive than a barley crusher and it's much more robust...just took some planning and building.

msheraw 06-08-2009 07:10 PM

Efficiency
 
Quote:

Originally Posted by Tonedef131 (Post 1369151)
Not at all, I think driving both of rollers would be complete overkill. I built my mill out of Monster Mill rollers, an old dryer motor and sheaves and a belt from grainer and I had about $150 into it when all said and done. That is no more expensive than a barley crusher and it's much more robust...just took some planning and building.


What is your average efficiency with the monster mill?

Tonedef131 06-08-2009 08:03 PM

Quote:

Originally Posted by msheraw (Post 1369773)
What is your average efficiency with the monster mill?

At .037 I get about 75%. But it's fully adjustable to you could tighten or loosen to your preference.

HenryHill 06-08-2009 08:12 PM

Quote:

Originally Posted by msheraw (Post 1369142)
I think we all agree a motorized malt mill can be somewhat expensive. I could really use advice / insight as to if it is necessary to have both rollers driven?

Could you save some money and just go with JSP with the fixed single drive motor? Is the gear drive really necessary?

:tank:

It is not necessary and not even an advantage. Mine is a fixed gap JSP (I would not buy one; mine was free from MBC) with a Bodine AC gearmotor. I would buy a BC or MM. Yes, standard motors are cheaper, but then you have to get pulleys (sheaves) and a v-belt and then guard the belt.


You can find large enough gear motors for $50-$80 on Ebay, , and the Lovejoy couplings and spider from McMaster Carr are less than $15.

Munsoned 06-08-2009 08:24 PM

The one at my LHBS only drives one roller--I think it works pretty well.

red82mtu 06-08-2009 08:57 PM

I would think that adjustablilty would give you more benfit that dual driven rollers.

That and you can always passively drive the second roller with a rubber o-ring around the driven roller that is slightly thinker than your gap size as most JSP mills are.

bakins 06-09-2009 12:03 AM

The grain going through the mill generally causes the other rollers to turn. So there is no need to have both powered. At least not with my BC.


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