In addition to being a great place to find electric, hydraulic, mechanical and pneumatic parts at reasonable prices, Surplus Center has a tech section to help you figure out what should work with what.
Got an air compressor head and need to figure out what HP gas or electric motor will run it?
Need to know what size hydraulic hose you need to use with that pump?
How fast will the wedge move if I use this pump and that cylinder on a log splitter?
What do all those numbers on hydraulic cylinder even mean?
All these and more can be figured out from their tech section:https://www.surpluscenter.com/Tech-Help/Tech-Help-Home/