The crosshead is drilled and tapped for a set screw at the threads of the piston rod.
The testing period of hydraulic piston rod, precision linear shafts, cylinder chrome rod, hard chrome shaft, hard chrome plated rod, C45E rod, hard chrome piston rod, hard chrome bar, piston shaft and hard chromium rod reaches to 500 hours and is rated as 9.
Reaching out to the manufacturer of your product to see what their recommendations are for replacing this part.