Posted by NY 986 on April 28, 2017 at 06:39:59 from (184.53.48.57):
In Reply to: Re: Why 540 RPM? posted by Texasmark1 on April 28, 2017 at 05:48:54:
Yep, the sickle mower explanation makes the most sense. Back in the 1920's ag engineers probably did not envision tractor power driven forage harvesters or balers to name a couple of machines. The power mower was the dominant PTO driven machine in the industry and things went from there. Low torque machines that soon followed such as the manure spreader and corn picker did not care as to tractor shaft speed. When high torque machines such as balers and forage harvesters came along then the engineers sensed the need of a higher out put tractor shaft hence 1000 RPM PTO. I've run a 540 RPM NH 782 forage harvester and an 1000 RPM NH 790 forage harvester and the 790 runs considerably easier.
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