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Motorizing malt mill

PostPosted: Sun Jan 22, 2012 2:33 pm
by jimmiec
To motorize a malt mill (Monster 3 roller) what size motor is best? 1/3 HP motor? Is it better to run it with sheaves and a belt to reduce the RPMs? If not using sheaves, where do you get the adapter to connect the drive shafts?

PostPosted: Sun Jan 22, 2012 2:45 pm
by aleguy
Grainger has the adapters for direct drive. I would choose a motor that is already geared for the appropriate RPM range. Belts and pulleys are dangerous. Check ebay for the motors. Redtail got a reversable gate motor that has the right RPMS from ebay. It works very well. I can't say how much horsepower it has, but anything that's strong enough to move a gate is strong enough to run a malt mill.

PostPosted: Sun Jan 22, 2012 3:41 pm
by jimmiec
What is the best RPMs 200?

PostPosted: Sun Jan 22, 2012 3:48 pm
by jimmiec
I see on monstermills FAQ says 100 to 300 RPMs.

PostPosted: Sun Jan 22, 2012 4:59 pm
by aleguy
Then you have your answer. Just look for a motor geared for that range.


PostPosted: Sun Jan 22, 2012 5:15 pm
by sdspespo1
I am in. I need one also. Seems that if Mark has a gate motor that somewhere around here we should be able to find a store/company that sells them. I went to the Parker supply web site from the link that Ray put up and they have motors also. I just don't know the specs to order. I looked at Grainger as the guy in the Parker store directed me there. Let me know what you find I go in with you.

PostPosted: Mon Jan 23, 2012 9:39 am
by jimmiec
I did find this motor on ebay with 170 RPMs and torque of 115 at 60 Hz. ... 959wt_1139

What do you guys think?

PostPosted: Mon Jan 23, 2012 9:52 am
by aleguy
It seems perfwct except for one thing. It's a three phase motor that rquires 230 VAC, you should keep looking. Ifvyou can find a motor like this that's 110 to 120 VAC, then you're set.

PostPosted: Mon Jan 23, 2012 10:05 am
by redtail28
Gene's motor turns 200 rpm and has 44 inch of torque
but does has trouble getting started with a full hopper.
My is a gate motor with a reverse it turns 120 rpm
and has 66 inch of torque i think. got it on ebay for 50

Jimmie that one you have picture looks very nice
I like that its Variable Speed (rpm) and 115 or torque
you should be golden

PostPosted: Mon Jan 23, 2012 10:21 am
by aleguy
Again. It's a 230 volt motor. Household current is 110volts. You would have to have a special 220 volt outlet installed to run this motor.
A brief search of ebay turned up nothing useful. Yeastmeister is the kung-fu master of finding things on ebay. Perhaps he could help with your search parameters.

PostPosted: Mon Jan 23, 2012 10:57 am
by jimmiec
That's what I have been reading too Redtail28. People are complaining about torque of 40 lb-in and are suggesting 60 lb-in or higher. They say for the 40 lb-in motors they have to start the motor and then pour the grains and hope nothing bogs it down.

They claim this unit will run on 110 V but it will reduce the torque and RPMs. Would probably run hotter since it would have to work twice as hard.

I guess keep looking. The best results have been searching induction motors and sometime throw in geared.

PostPosted: Mon Jan 23, 2012 11:15 am
by aleguy
Keep looking! You will eventually find one that is right for you at the right price. I would never consider using a three-phase 230 volt motor at 110 volts. It may work, but you will most likely damage the motor and end up looking for the right one anyway. Might as well get the right one from the start.

PostPosted: Mon Jan 23, 2012 2:58 pm
by yeastmeister

Looks like it should work. Its 115v, 50 inch lbs, but it needs a capacitor. You can pick that up locally for a few bucks.

But again, your mileage may vary.

PostPosted: Mon Jan 23, 2012 3:10 pm
by aleguy
Get it NOW, Jimmie!!!

PostPosted: Mon Jan 23, 2012 3:33 pm
by jimmiec
"But again, your mileage may vary" meaning the shipping? Sorry.

Does it matter the capacitor is 220-250V? It looks like the one at Grainger is. I'm not sure how the capacitor hooks up to the motor. All I understand is it will start the motor and increases the starting torque.