The answer depends and what you are chipping and what kind of production volumes you are expecting.
I have an 8" chinesium PTO
chipper. I also have experience running bigger self powered diesel units.
The PTO unit is ok for doing a couple of trees at a time i.e. you need to remove a tree and want it cleaned up after. If you are expecting to run the
chipper 8 hours a day you are beating up your tractor and PTO
chipper for no good reason.
You need HP to keep that flywheel turning and putting on a bigger flywheel is like attaching a bigger engine brake. You also need flywheel speed to keep your
chipper operating efficiently. As the flywheel slows, chips exiting the machine slows and you end up plugging your chute faster and more often. End result is you will waste more time pulling the
chipper apart to clean the chute and the
chipper housing instead of making chips.
If you are expecting any kind of production get the biggest self power diesel unit you can afford. Expect breakdowns and repairs.
If you are clearing brush and cr@p already on the ground go rent a forestry mulcher with a minimum 100HP CTL or bigger machine. It will be faster and less manual labour than using a
chipper.
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