It's my understanding that hydraulics are merely a means of gear reduction to move a given object. So then I'm wondering why I can't find a formula or way to determine the following issue:
I want to run a gear pump (specifically a hydraulic motor as a pump; I know it will be more inefficient) with a DC electric motor. The system is meant to run intermittently so will not be subject to constant load like one would find in industry. I can't utilize a large bulky large HP motor so I am trying to run it with a below-spec HP motor that has a large amount of torque. Everything I've managed to find though seems to read as torque is insignificant, the HP rating is the determining factor. Is this correct? If horsepower=torque * RPM, wouldn't a small HP/large torque motor work, just at a lower RPM/speed?