Yep, set screw. There's a flat spot on both the motor output and the mill input for the screw to sit on. I don't know of the Barley Crusher has the same, but if it doesn't a kiss with an angle grinder will make short work :)
Robyn
I got it from this guy, who has exactly one left:
http://www.ebay.com/itm/230671841645?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649&afsrc=1
If you decide on it, make him an offer, I paid him $90 for mine.
I adapted it using these...
There are many like it, but this one is mine:
An eBay conveyor belt motor. The boiler plate says it's rated at 1/8 HP and ~40 in-lb. It is *definitely* beefier than that. It doesn't even slow down under load. The numbers appear to be fiction, but good fiction :)
A postal scale from...
Here's my first attempt, taken June 15, 2013.
Zeus, Nugget, Mt Hood and Centennial. The crowns did really well, and about half of the rhizomes sprouted. I just finished the ropes and trained them this morning, mostly due to laziness :)
Robyn