Beyond the six factors previously outlined, there are some other considerations that should be taken into account when selecting a gearbox or a power take-off unit of any kind - not just a pump drive. When selecting a PTO, the following things should be kept in mind.
Type of prime mover
A gearbox and PTO designed for use with diesel engines will not work as well with a hydraulic prime mover, for example. The type of prime mover must be considered carefully when selecting a PTO. Make sure to choose the right gearbox for a diesel, or petrol engine, or electric-powered or hydraulic motor.
Inertia of the machine to be driven
A high-inertia machine will typically put more stress on a gearbox, due to the heavy torque loads and weight applied to the unit during each rotation. The heavier the pump or other machine is, the more robust the gearbox will have to be. Special bearings and housing designs may be required to accommodate these high loads on the input shaft. This guide is a helpful r...