We have the 60" Mahindra rotatry cutter with the slip clutch recommended by our dealer over the shear pin style drive. That slip clutch saved my bunns when I caught the telco box along the road in brush 8' tall. Did not see it as it had been hit by someone else - first time mowing the field - and I went over it. Well, that Mahindra cutter chewed up the box and then when I lifted the cutter, it just fell out the bottom. Did a good look around and said, "Well, let's give 'er a go!" Started the PTO, brought up to speed and moved on to the next adventure - finding the rock piles in the feild that were only a foot and a half high! More bouncing and stressing that Mahindra. The stump jumper also saves you on a rock pile!
Someone wrote about the weight hanging on the back of your tractor and if you get stuck, getting out is a bit troublesome. Yep, same field, I got hung up on grape vines alongside a little brook. You guessed it, we slid down into the brook and no matter what I tried, our Massey 1533 was not getting enough purchase with the front wheels to get 'er up outta there. Another friend told me, if ya own a tractor, ya need a friend with a bigger tractor! Our friend hooked us up with a chain and pulled us right out of that little brook.
I like our brush hog. Took out 1-1/2" diameter samplings along the trails that needed maintenance. Anything bigger we chose to take with a chain saw. I think we could push towards 2" but I didn't want to kill that rotary cutter in our first season! Strong machine and our thanks to T&E Small Engine in Floyd, VA for recommending this brush hog.
Season two is about to begin... let you know if we learn anything new!