Here's a somewhat grainy pic (photo scanned in before I got my digital camera) of my rotary plow after I repainted it.
That bucket between the plow and tractor is what the PTO end of the plow is sitting on. It wasn't bolted up to the tractor in the picture.
It's a great machine for breaking new ground that has grass on it. Wish they made one that would go on my JD PTO. Actually, wish they had a pair of them with variable spacing run off the PTO.
I've never checked the rpm. Think it's around 1,000 in low range.
Ralph