However, i then used the electric drill. This showed up a slightly bent shaft - causing a wobble.
For what it's worth, if any one is thinking of buying an American mill,
the Crankandstein has a replaceable input shaft that is machined and then screwed into the end of the drive roller.
The shaft is often bent by an unsupported drill "hanging" on it during the milling process. ( Not saying that this happened to GMK's unit )
Crankandstein offer an optional 1/2" inch input shaft which is much stonger and less prone to bending and this size shaft just screws into the roller for easy replacement. It also negates the need to use an adapter or reducer for a pulley to fit a 1/2" shaft.
Batz is spot on re the hoover twin tub motor and gearbox.
This is what I am using to power my new mill and the output speed is 100rpm.
( It came originally from a washing machine and it has driven a spit for many years before being fitted to my mill)
I actually had to step up the speed by using a 5" pulley on the motor and a 4" pulley on the mill. this gives me a speed of 125rpm which is on the slow end of the specs but at that speed I get no shredding of the husks at all. ( 5kg in 3 mins, if speed is important )
and I'm trying to find a good Oz online supplier of pulleys and v-belts now. Not having much success with that so far though.
Doc
I bought my pulleys from our local Mitre 10 which for most items is faily expensive due to freght etc.
Two pulleys cost me under $20.00 which I thought was pretty good.
There are lots of companies that supply pulleys and belts, just do a google on power transmission.
Cheers