[redbeerman]

I also bet a bench grinder motor is too weak. Even with the speed reduced which will increase power - it may spin fast but stop on the first grain of malt because it is not powerful enough.

?? My bench grinder has plenty of torque.

Well that's why I said "I bet" - I might loose. The bench grinder I've used slows down the moment you touch something to the wheel. Granted - I'm not doing math here.

Mine could rip your arm off at full rpm, but you have a point, they are not all the same.

[repo]

But that is not torque. Bench grinders are not designed to have torque- the stone wheel could become a shattered projectile. I have not encountered a bench grinder you couldn't keep from turning on with a slight amount of force from your hand. Grain could do the same thing.

[coastsidemike]

But that is not torque. Bench grinders are not designed to have torque- the stone wheel could become a shattered projectile. I have not encountered a bench grinder you couldn't keep from turning on with a slight amount of force from your hand. Grain could do the same thing.

As mentioned by others, inexpensive corded drills are great for this.  One thing I'll add is to use a router speed control (or "variable speed controller") to get the exact RPM needed.

[Wort-H.O.G.]

But that is not torque. Bench grinders are not designed to have torque- the stone wheel could become a shattered projectile. I have not encountered a bench grinder you couldn't keep from turning on with a slight amount of force from your hand. Grain could do the same thing.

As mentioned by others, inexpensive corded drills are great for this.  One thing I'll add is to use a router speed control (or "variable speed controller") to get the exact RPM needed.

+1