Grain crusher for grapes

Grape crushers operate differently from grain mills. Rollers on grape crushers operate much like gears. One roller is actively driven by the motor. The cogs of that roller mesh with the cogs of the other roller to drive it. For this reason, the rollers always touch regardless of how you set the 'gap'. With a grain mill the rollers are smooth and never touch. The 'gap' is the same at all times and the grain is cracked as it passes between the two rollers."

So, I doubt that it will work very well. But give it a try, and let us know what happens.