Power take-off: Difference between revisions
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==Technical== |
==Technical== |
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Agricultural PTOs are [[standardisation|standardized]] in dimensions and speed. The original specification calls for operation at 540 rpm. Two newer specifications, supporting higher power applications, operate at 1000 [[Rpm]] and differ in shaft size. The larger shaft has 20 splines, while the smaller has |
Agricultural PTOs are [[standardisation|standardized]] in dimensions and speed. The original specification calls for operation at 540 rpm. Two newer specifications, supporting higher power applications, operate at 1000 [[Rpm]] and differ in shaft size. The larger shaft has 20 splines, while the smaller has 27. All three types rotate counterclockwise when viewed from the tactor. |
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Revision as of 20:55, 11 January 2006
A power take-off (PTO) is a splined driveshaft, usually on a tractor or truck that can be used to provide power to an attachment or separate machine. It is designed to be easily connected and disconnected. The power take-off allows implements to draw energy from the tractor's engine.
Safety
The PTO and its associated shafts and universal joints are a common cause of accidents and injury in farming and industry. When a piece of clothing, which can be as small as a single thread, touches a spinning part it can be pulled around the part. The clothing and the person wearing it are instantaneously pulled into the shaft resulting in loss of a limb or death. Some implements do use metal guards to try to keep a person from becoming entangled in a PTO shaft, but even with guards people need to exercise caution around PTO shafts when they are plugged into a tractor. In some countries it is illegal to operate a PTO without the shaft correctly fastened.
Technical
Agricultural PTOs are standardized in dimensions and speed. The original specification calls for operation at 540 rpm. Two newer specifications, supporting higher power applications, operate at 1000 Rpm and differ in shaft size. The larger shaft has 20 splines, while the smaller has 27. All three types rotate counterclockwise when viewed from the tactor.