Welding cylinder ∮50 cylinder diameter How thick is the piston rod?

Does the subject want to ask "How thick is the piston rod of welding cylinder 50"? 18 mm. According to the introduction of welding cylinder 50, the cylinder diameter of welding cylinder 50 is 40mm, and the piston rod is18mm. Cylinder stroke1745; After assembly, the pressure test is 20MPA. The rear cover of the oil cylinder is welded on the cylinder barrel, and the oil port is welded on the cylinder barrel. The front cover and cylinder barrel are usually fixed with threads or bolts.