Re: shortening piston pins?
Go to any Tool and Die Shop,its an everyday operation like sharpening punches . Best way is block and stack on wet grinder. Best to also give them the length you need instead of just telling them to take 40 off each end. Make sure to have each end ground by half instead of all off one end. Could also ask to have END Rockwelled before and after grinding. Carbide facing will work, but MUST be FLOODED with coolant to prevent softening end where lock rubs. Good luck,hope I was helpful.
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