Use this with my little 19p (14 PTO) Yanmar. It has no problem at all spinning this in red Georgia clay. The only problem I have with it is not the fault of the auger but the light weight and limited lift capacity of my tractor. I have to let it feed very slowly so that it doesn't get too much bite and turn into a giant screw that bury its self all the way to the gear box and pick the front of the tractor up off the ground. The lift is no where ea strong enough do deal with a buried condition.

need to add the size of the shaft to the list. not all gear boxes are the same size shaft.