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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > 1/2" Hammer Drill work for grain mill?
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Old 08-13-2012, 06:13 PM   #1
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Default 1/2" Hammer Drill work for grain mill?

So I built my mill and the motor I used was not powerful enough. I have tried using two different 3/8" drills but they can't cut it either. One went too fast and the adjustable speed one when going slow enough wasn't powerful enough.

I have access to a 1/2" drill but its a hammer drill would this work?

It's a Shmidling malt mill so the rollers are like 10" long which is why I think it takes a fair bit of force to turn it, grinds a lot of grain at a time. Also if I go too fast the grain just bumps along on top of the rollers and won't really enter the rollers. I believe this is because one of the rollers are passive.

Grinding by hand is pretty labor intensive so I have been trying drills as a short term solution until I can find (afford) a more powerful electric motor for my belt and pulley system.

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Old 08-13-2012, 06:16 PM   #2
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I believe most hammer drills have a switch to turn off the hammer, if this is the case, I would think you could use it to turn your mill.

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Old 08-13-2012, 06:23 PM   #3
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I believe most hammer drills have a switch to turn off the hammer, if this is the case, I would think you could use it to turn your mill.
I have a monster Bosch hammer drill and yes the hammering function can be turned off. Mine has a special chuck so that you can only attach bosch bits, so I don't think it would work.

BTW, I've got a Schmidling mill. I use a corded drill, 1/2" chuck. Can't remember the make, but I think it's a 7A drill.
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Old 08-13-2012, 06:40 PM   #4
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Perfect guys thanks so much.

Passedpawn did you make your own hopper or use the shmidling one? If you diy your own could you show me a pic?

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Old 08-13-2012, 07:27 PM   #5
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Perfect guys thanks so much.

Passedpawn did you make your own hopper or use the shmidling one? If you diy your own could you show me a pic?
I use the schmidling one. I've thought about it, but I don't mind using my 1qt cup to scoop grain in there while milling. If I ever put a motor on the mill, though, I'll definitely make a hopper. I've got a culligan water bottle that would work I think.
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Old 08-13-2012, 08:11 PM   #6
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Do you notice the same thing if you go too fast the grain doesn't feed?

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Old 08-13-2012, 08:40 PM   #7
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Do you notice the same thing if you go too fast the grain doesn't feed?
I can (and often do) run the drill as fast as it will go. No problem.
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Old 08-14-2012, 06:12 AM   #8
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I used a hammer drill for a long time and realized not too long ago that you could switch it to normal mode. Should work fine either way.

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Old 08-14-2012, 12:55 PM   #9
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What happens if you run a mill too fast (i.e above 250 or 400 RPM?) Nothing crazy like 2500 RPM, lets say 500 RPM

1. Does the grain stop feeding?

2. Does the quality of the crush suffer?

3. Does it damage the mill?

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Old 08-14-2012, 01:20 PM   #10
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Won't feed, grain will bounce around inbetween the rollers. When I slow down enough for the rollers to grab the grain the force required to turn the mill was too much for the two 3/8" drills I tried.

Doing it by hand requires a lot more effort than the smaller mill at my local HBT.

I will return the drill I got and put in the extra cash needed to get the 1/2 hammer drill.

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