Roger. I don't rember the specs but someone on here posted the same items a year or more ago to pwr their grain mill and i sourced the same thing out. I use a 1 " drill to pwr mine and never had time or effort to rig this up. I let mitch bigger at Railcar have it for ... geez a year or more and he never rigged it up either. If you want to "try before you buy" i can deliver it some time