In his PDF he makes the following statement:
" Many brewers utilize a cordless drill for mill motorization, but it is tough on the drill and shortens its useful life. With a good quality drill going for hundreds of dollars, it makes more sense to motorize the mill."
Which sort of left me scratching my head.
A) A cordless?? WTF? he's joking right?
B) A corded MILWAUKEE hole shooter magnum will last your lifetime.
I have three Milwaukee corded drills. The eldest ( a 3/8" hole shooter) is over 30 years old and I have used it extensively as a screw gun, rebuilding several old homes driving 3 and 4 inch screws instead of nails all the freaking time. The last big projects were a 20 by 40 foot PT deck all of which was screwed together and a master bath which was also entirely screwed. I wrecked the reversible trigger and the replacement part was a lousy $30.00
If you don't want to motorize a grain mill ( Jeezuz just thinking of all the space that takes up) get a Milwaukee Corded Drill.
You'll use it for a goZillion other things and when you are dead your grand kids will fight over it.