Steel 5120 hard chrome plated piston pin
The piston pin is made of steel 5120, quenched and tempered to HRC 33-38, then plated with hard chrome.
We need to grind the piston pins twice, before and after the hard chrome plating, in order to meet the tight tolerance on the OD.
|Steel AISI 5120 (GB Cr20)
|OD 35 x Length 130
|Tolerance for key dimension (mm)
|0/-0.007mm on the OD
|Hard chrome plating 0.08-0.12mm thick
|CNC turning, centerless grinding