Boy am I confused now. Maybe someone else can sort out Royce's problem with not having the correct O ring.
Clark Royce Woodbury wrote: > > I wrote : > > "Thanks for responding, Peter. The groove as designed by Gordon Watson, > is smaller than the ID of the Oring. This led me to believe that it is > undesirable to not allow compression (from contact with the bore of the > cylinder) to the inside of the Oring. By increasing the groove OD to > enlarge the Oring OD, you capture the Oring between ID and OD. It is my > understanding (and I could be wrong) that this is not the way Orings are > designed to work, as it would increase friction unecessarily. But if > this is OK, then you bet, I'll make new pistons rather than new cylinders. > > PS. the Orings supplied by Gordon Watson (viton) were the correct OD > (.438). I bought some Buna-N orings at the local tool supply store and > they are undersize. I concluded that they wouldn't work UNLESS the OD > of the piston groove were increased to bring the OD up to .438. Again, > I ruled this out based on the logic above. But if it is OK to capture > the Oring, please let me know before I make new cylinders. " > > Thanks to Clark, Harry etc on other issues raised . . . . . > but does anyone have any thoughts on the above problem ? > > royce >
