Author Topic: Mill motor  (Read 13465 times)

Offline hokerer

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Mill motor
« on: January 03, 2011, 05:14:45 PM »
In keeping with one of my brewing resolutions, I've started looking at motorizing my mill.  Anybody have experience with a motor like this...

http://www.surpluscenter.com/item.asp?item=5-1098&catname=

...as I'm not sure it'll have enough "oomph".  If I'm calculating things right, it looks like 40 in-lbs torque at 177.7 rpm comes out to a little over 1/10th horsepower.  Anybody know if that's enough?
Joe

Offline jeffy

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Re: Mill motor
« Reply #1 on: January 03, 2011, 06:08:42 PM »
In keeping with one of my brewing resolutions, I've started looking at motorizing my mill.  Anybody have experience with a motor like this...

http://www.surpluscenter.com/item.asp?item=5-1098&catname=

...as I'm not sure it'll have enough "oomph".  If I'm calculating things right, it looks like 40 in-lbs torque at 177.7 rpm comes out to a little over 1/10th horsepower.  Anybody know if that's enough?

Most of the motors you see for this application are 1/3 hp, but if you gear it slower you can use less.  I have a 12 volt motor from a decomissioned tread mill that turns the mill very slowly, but it works well.  It may take 20 minutes to crush 20 pounds of malt, but it never hesitates or stops.  I suspect it depends on the gear ratio more than the hp.
Jeff Gladish, Tampa (989.3, 175.1 Apparent Rennarian)
Homebrewing since 1990
AHA member since 1991, now a lifetime member
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Offline Thirsty_Monk

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Re: Mill motor
« Reply #2 on: January 03, 2011, 10:15:40 PM »
People usually use 1750 rmp motors and then they "gear" it 10 to 1 to about 170 rpm.
So the rmp is about right. 
Na Zdravie

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Bohemian Dark Lager
Smoked Bock
MaiBock
American Brown Ale
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Offline tom

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Re: Mill motor
« Reply #3 on: January 04, 2011, 12:42:39 PM »
I think the gearmotors (already geared like the one shown) are better and safer. That one shown has borderline power, but I know several brewers here use that very one. I hope they chime in.
Brew on

Offline rabid_dingo

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Re: Mill motor
« Reply #4 on: January 04, 2011, 12:51:32 PM »
I have that same one. It works like a charm. It's not about speed its about quality. If it takes
me two more minutes to mill my grain so be it. I got it in October and had it running actively
in the brewery a couple of weeks later.  20gal that week, as I had not had a working mill
since May.




Edit was to add pic.
« Last Edit: January 04, 2011, 12:56:41 PM by rabid_dingo »
Ruben * Colorado :)

Offline dak0415

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Re: Mill motor
« Reply #5 on: January 04, 2011, 12:57:31 PM »
I'm in the process of building this very one now.  I'll let you know how it works.

This one is slightly slower with 20% LESS torque
http://www.artisanmaui.com/motormill/

Dave Koenig
Anything worth doing - is worth overdoing!

Offline hokerer

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Re: Mill motor
« Reply #6 on: January 04, 2011, 01:39:32 PM »
I have that same one. It works like a charm. It's not about speed its about quality. If it takes
me two more minutes to mill my grain so be it.

No problems with startup?  That is, does it have enough oomph to get going if you load the hopper and then start it up?  Sometimes, with my current drill, I need to get things spinning before dumping in the grain, especially with Rye Malt.

Oh, and nice setup.  That's just about exactly what I'm looking to do.
Joe

Offline hokerer

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Re: Mill motor
« Reply #7 on: January 04, 2011, 01:42:11 PM »
This one is slightly slower with 20% LESS torque
http://www.artisanmaui.com/motormill/

Yeah, I'd seen where some folks have used that motor (30 in-lbs) but the same site had the one I listed (40 in-lbs) so I figured it'd be safer.  If enough people are having good luck with the smaller one, I should be golden with the bigger one.
Joe

Offline Thirsty_Monk

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Re: Mill motor
« Reply #8 on: January 04, 2011, 10:06:57 PM »
Are you thinking about direct drive of drive with belt?
Na Zdravie

On Tap At The TapRoom:
Bohemian Pilsner
Bohemian Dark Lager
Smoked Bock
MaiBock
American Brown Ale
Marzen
Root beer

Offline hokerer

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Re: Mill motor
« Reply #9 on: January 05, 2011, 07:46:52 AM »
Are you thinking about direct drive of drive with belt?


With that geared motor, I'm looking at direct (albeit with a spider coupling) drive.
Joe

Offline Thirsty_Monk

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Re: Mill motor
« Reply #10 on: January 05, 2011, 03:53:08 PM »
Cool.

I might get the same motor but I was thinking to speed it up just a bit to may be 300 rmps.
Na Zdravie

On Tap At The TapRoom:
Bohemian Pilsner
Bohemian Dark Lager
Smoked Bock
MaiBock
American Brown Ale
Marzen
Root beer

Offline hokerer

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Re: Mill motor
« Reply #11 on: January 07, 2011, 10:47:10 AM »
Well, I'm trusting you guys and went ahead and bit the bullet...

Thank you for your order, we appreciate your business.  We have
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Order Number: I0180605

     1  5-1098                177.7 RPM 115 VAC GEARMOTOR                 39.95
     1  1-3419-C              3/8" L-050 JAW COUPLING HALF                 2.69
     1  1-3419-E              1/2" L-050 JAW COUPLING HALF                 2.69
     1  1-3419-X              BUNA-N INSERT FOR L-050 JAW COUPLING         1.09

                                                 Total $:                 46.42
Joe

Offline onthekeg

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Re: Mill motor
« Reply #12 on: January 07, 2011, 01:26:37 PM »
Many have used the Beefy Bodine motor successfully.  I'm not sure if this one will have enough power.  Let us know how it goes!  I just use my 1/2in Milwaukee drill on my 3 roller Monstermill.

Offline hokerer

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Re: Mill motor
« Reply #13 on: January 07, 2011, 01:58:42 PM »
Many have used the Beefy Bodine motor successfully.  I'm not sure if this one will have enough power.  Let us know how it goes!  I just use my 1/2in Milwaukee drill on my 3 roller Monstermill.

Yeah, the Bodines aren't available any longer so they were out.  I too have been using my drill on my Monster Mill but I've gotten tired of chucking/unchucking, holding the drill, controlling the speed, and all that stuff.
Joe

Offline onthekeg

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Re: Mill motor
« Reply #14 on: January 07, 2011, 04:22:49 PM »
I don't use the big drill for too much so I just leave it chucked up.  I built a support for the drill so the weight isn't on the shaft of the mill and just leave it there.