Hi Guys and Girls, I am a final year mech engineering student doing my thesis. My project is to design a bench and apparatus to "strip" cylinders. This requires the end caps to be removed (or clamps in some cases). The rod to be extracted, sometimes requiring large force, and the piston retaining nut to be removed. Now I am in the research stage and as a basic idea I have though about using hydraulic cylinders to extract the rod from the barrel. As for the retaining nut I had the idea in my head of coupling a reasonably large hydraulic motor to a planetary reduction. I am probing for ideas, suggestions or any sort of information if you guys may be of some help. I am new here so apologies if I am expecting too much. PS> the cylinder I am basing the design around is a 10.5" bore, 1145mm stroke, approx 780kg. The retaining nut is torqued to 8000Nm (plus or minus 800). I want to design for approx 15 000Nm if possible to account for cross threading or overloading (that is ensure bench and motor etc. are capable) THanks. Sorry about the novel... ha ha.