Posted by Brendon-KS on December 16, 2017 at 05:02:05 from (63.245.145.35):
In Reply to: pto rpm posted by 88-1175 on December 15, 2017 at 21:38:07:
As the others have indicated the implement is designed to run at the same speed regardless of what speed of PTO shaft is driving it. It is common for implements that need a gearbox in the driveline anyway to use one with a 1.35:1 ratio. This provides the same output speed (730-740 rpm) from either 540 or 1000 rpm input speed depending on which direction it is assembled. This minimizes the number of unique parts betweem the two versions and makes for simple field conversion.
You can think of mechanical power, speed, and torque the same as you do electrical power, amps, and voltage. Higher rotational speeds will deliver more power with the same amount of torque just like higher voltage will deliver more electrical power with the same amperage. A 1000 rpm driveline can deliver double (well, almost) the power as the same strength of driveline could at 540 rpm. Somewhere around 80 hp is where it becomes physically impractical to have a driveline heavy enough to withstand the torque of a 540 rpm drive.
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