Re: Rudder bushing material? Delrin, PTFE, UHWM, VHF, CIA..
Those were very interesting - in the end it seems most folks are using the delrin - either the stock ones from D&R marine or fabricating their own.
I liked the third link alot, it explains a good way to fill the tube with epoxy and graphite to from a long continuous rudder bearing. That's on my list of things to do this spring..
I have a sort of whacky idea for my thrust washer, thoughts would be appreciated:
On the top rudder post mating surface (underside of hull at shaft opening): I will rebuild the rough surface with an epoxy & graphite mix. This way the upper surface will be smooth and fairly low friction thanks to the graphite.
Now for the lower surface (top of rudder where the shaft exits the rudder): I could have a shop make a stainless steel washer (316 stainless), but it would have a slightly enlarged inner diameter, say 1/4" too wide. I would then epoxy that washer in place centered on top of the rudder. This way the washer would not corrode or cause corrosion with the shaft (since I don't know what grade steel it is) because it would be offset from the shaft by a 1/8" gap filled with epoxy.
In my mind, this seems like a great solution - the compression washer won't scrape away in a year or two and no shaft corrosion. So I'm sure I'm missing something - what is it?
Do the plastic (delrin) washers act like shock absorbers - meaning the steel would just be too hard to use in this situation?
As always, anyone's thoughts, insights, or experience would be greatly appreciated!