For production of the piston rods or plungers we apply both ways: using common chrome plated steel bars or in-house manufacturing right from raw materials. For this purpose HES has available machines for CNC-turning, center-less grinding, polishing as well as own electro galvanizing installation for hard chrome plating.
The standard thickness of the chrome coating is between 25μm and 35μm. A thicker layer is also possible on a special request. Performing a 200 hour test in a neutral solt mist, guarantees a level of corrosion protection class 9 according to ISO 10289 NSS.
Induction hardening devices allow us to produce hardened, dense or hollow rods up to 1.5 meters in length.