O-ring for sealing reciprocating piston
O-ring for sealing reciprocating piston
(OP)
Parker recommends the use of a hard chrome plating on the bore for a reciprocating piston sealed with an O-ring. What are the qualities of hard chrome, besides hardness if any, that make it so suitable as a counter-wearing surface? Are newer coatings like TiN superior?





RE: O-ring for sealing reciprocating piston
Ted
RE: O-ring for sealing reciprocating piston
Mating surfaces that are too smooth will rub the o-ring to death very quickly.
Be aware that you also need some axial clearance in the gland in a reciprocating application, to allow the o-ring to roll a little bit, again to carry oil under/through the seal line.
Mike Halloran
Pembroke Pines, FL, USA