Greetings.

Do you know of a hydraulic piston or piston-cylinder assembly that I can re-purpose instead of fabricate/re-invent the wheel ?

Similar to brakes, much larger diameter, like 50 to 100 mm.  To work in reciprocating motion, only about 50mm travel, ~<10 strokes per second, up to 5000 psi.  (not with a seal for rotating shafts) It is to produce pulses of hydraulic pressure.  

 

Like a driven small engine using it as a hydraulics reciprocating compressor  🙄

-Images borrowed from the web-

1 hour ago, Externet said:

Do you know of a hydraulic piston or piston-cylinder assembly that I can re-purpose instead of fabricate/re-invent the wheel ?

Similar to brakes, much larger diameter, like 50 to 100 mm.  To work in reciprocating motion, only about 50mm travel, ~<10 strokes per second, up to 5000 psi.  (not with a seal for rotating shafts) It is to produce pulses of hydraulic pressure.  

Are you trying to transfer logic or power with these pulses ?

And are you working against a fluid at 5000 psi?

 

Perhaps you could flesh out the detail a bit more ?

Also perhaps a diaphragm might have better sealing, response/recovery time than a piston.

2 inch displacement at 5000 psi, on a repetitive basis,  is quite a tall order.