I need to make some new rings for my 1500 Speedy, when I took it to bits there was virtually nothing left, just a few slivers of string!!
Coming from G1 I have used PTFE rings backed with Viton O rings which work very well, in my opinion much better than the long recommended graphite yarn.
I have a nice piece of filled PEEK which I was thinking of experimenting with, anyone have any experience with this compared with graphite filled PTFE?
For 5" I intend to make one piece rings as proposed by Artisan, any comments about how these compare with my G1 experience?
The PEEK clearly has some carbon loading, it's black, but whether this is enough to give good abrasion resistance I'm not sure, the cylinders are bronze so I'm concerned about wear.
The part was left over from an F1 application where wear was unimportant, as long as they made it to the finishing line!
The alternative would be to get hold of some 25% or 35% graphite filled PTFE but it looks like I have to buy a meter or two when I really only want 150mm max, and it's expensive.
The fallback option is braided graphite square yarn which a lot of friends still swear by.
Thoughts?