Originally Posted by jammin
I would get the appropriate gear reduction parts AFTER you get a mill and motor.
Different mills can run at different speeds. It's all about finding the right speed to develop a proper crush. A proper crush will break the kernal down into at least 2-3 pieces and knock them out of the husk. The integrity of the husk will also be dependant on your system. If you have trouble with lautering rates, you will need to be conservative with your husk integrity to avoid stuck mashes and save time on your brew day. If you're having serious trouble with getting good husks, you might consider conditioning your malt with 2% water by weight.
What is your budget for a mill? If you have the coin, the Monster Mill 2 roller with 2 inch rollers is a sweetheart.
I run my MM3 2.0 at about 157 RPM's and the crush is perfect for my Blichmann false bottom (10 gallon kettle). I get a good balance of efficiency and quick lautering times and never have to worry about a stuck sparge.
I hope to operate a gear motor and not the pulley system and most of the motors I am looking are being sold already attached to a gear head. As a result, I need to figure mill speed (or if I go the VDC route, maximum mill speed) in advance.
Regarding budget, low enough that I can honestly tell SWMBO that the packages arriving don't do major damage to a new house down payment.
As Far as mills go, I had settled on the Moster Mill brand, but am still deciding between MM 2 roller v.2 (the one you recommended) or Moster Mill 3 with the 1.5 inch rollers.
Thanks for the input everyone. I have everything else setup, a kegerator, an electric brew rig with recirculating mash HERMS. The grain mill should allow me to break free of the store and order grains in bulk (or to not hand crank all of them at the store). I hope this will be my last brewery upgrade for a while . . . at least until I move and have to adapt to a new space.