One of the best features about tractors is the versatility of the back end. The strong diesel Tractor Pto Drive Shaft engine comes with an output shaft on the back coming out of the 3 point hitch referred to as the Power REMOVE or PTO. That is an engineering foresight that’ll be difficult to match. With the invention and wide implementation of this single feature, it offered tractors the opportunity to use three stage attachments that had gearboxes and other turning components without adding an external power source or alternate engine. As the diesel engine that powers the onward movement of the tractor spins, it turns this PTO shaft generating tillers, mowers, sweepers, and several other attachments that basically crank out the horsepower and get the job done. When looking at PTO shafts, you have to figure out the forces that are put on these essential pieces and the basic safety mechanisms that must definitely be in place to protect yourself as well as your investment. First thing you notice when looking at a PTO shaft may be the plastic material sleeve that encases the whole length of the shaft between the tractor and the attachment, the steel shaft is really turning inside of this soft protective casing, protecting against curious onlookers from grabbing a high horsepower turning shaft and genuinely doing some damage to their hands and hands. The next thing you might notice is the bolts and plates that are located at one end of the shaft, these bolts and plates are the automatic pressure relief program that manufacturers put on them to release pressure if for instance a tiller digs partially into hard floor that it could not power through, 1 of 2 things may happen, the slip-clutch will engage and absorb almost all of the excess energy, or the “shear” bolt will break off allowing the PTO to carefully turn freely while disengaging the energy going to using the working parts of the attachment. Tractor PTO shafts can be found in varying sizes, to get you close to the actual size of shaft that you will need for your unique purpose, but virtually all PTO SHAFTS REQUIRE CUTTING FOR PROPER FIT!
A vitality take-off (PTO) shaft transfers mechanical electric power from a tractor to an implement. Some PTO-driven products is operated from the tractor seat, but many types of farm equipment, such as elevators, grain augers, silage blowers, and so on, are managed in a stationary placement, allowing an operator to leave the tractor and move in the vicinity of the apply.
A PTO shaft rotates at a velocity of either 540 rpm (9 rotations per second) or 1,000 rpm (16.6 rotations per second). At these speeds, a person’s limb could be pulled into and wrapped around a PTO stub or driveline shaft many times before the person, even a person 
with very quickly reflexes, can react. The fast rotation speed, operator error, and insufficient proper guarding produce PTOs a persistent hazard on farms and ranches.