Among the best features about tractors is the versatility of the trunk end. The powerful diesel engine comes with an output shaft on the trunk coming out of the 3 point hitch known as the Power Take Off or PTO. This is an engineering foresight that will be difficult to complement. With the invention and large implementation of this single feature, it offered tractors the opportunity to use three level attachments that had gearboxes and additional turning parts without adding an exterior power supply or alternate engine. While the diesel engine that powers the forward movements of the tractor spins, it turns this PTO shaft driving a car tillers, mowers, sweepers, and many other attachments that really crank out the horsepower and complete the job. When seeking at PTO shafts, you will need to appreciate the forces that are put on these essential parts and the security mechanisms that must be in place to protect yourself and your investment. The very first thing you notice when searching at a PTO shaft is the plastic sleeve that encases the whole length of the shaft between the tractor and the attachment, the metal shaft is in fact turning inside of this simple protective casing, stopping curious Tractor Pto Drive Shaft china onlookers from grabbing a high horsepower turning shaft and really doing some 
harm to their hands and arms. The next thing you might notice is the bolts and plates that can be found at one end of the shaft, these bolts and plates are the automatic pressure relief system that manufacturers put on them to release pressure if for instance a tiller digs partially into hard surface that it could not power through, 1 of 2 things may happen, the slip-clutch will engage and absorb the majority of the excess strength, or the “shear” bolt will break off allowing the PTO to carefully turn freely while disengaging the power going to you see, 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’ll need for your unique purpose, but virtually all PTO SHAFTS REQUIRE Reducing FOR PROPER FIT!
A power take-off (PTO) shaft transfers mechanical electric power from a tractor to an implement. Some PTO-driven products is managed from the tractor chair, but many types of farm products, such as elevators, grain augers, silage blowers, etc, are managed in a stationary situation, allowing an operator to leave the tractor and move in the vicinity of the implement.
A PTO shaft rotates at a speed 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 covered around a PTO stub or driveline shaft several times before the person, a good person with very quickly reflexes, can react. The fast rotation speed, operator error, and lack of proper guarding produce PTOs a persistent hazard on farms and ranches.