Hello Jürgen, Hello Pythonists,
Im back from working in the northwest.
I have considerable experience using sintered bronze and nylon bushes.
Here in Australia there are not unlimited supplies of sizes of both
bushes. So I would buy solid bar and machine (lathe} it to size.
Bronze is very nice to bore out to size.But nylon is a bit painful to
work with as its not dimensionally stable.The machine tool has to be
incredibly sharp to take fine cuts.
I think that if either bronze or nylon bushes where engineeringly sound
idea's that the bicycle industry would have adopted them as common
practice long ago.
Nylon bushes are used for the tiny child' s bikes but they wear out rapidly.
Bronze bushes wear, they would be quite heavy and not adjustable.
The ball bearing idea is still in my opinion the best way to go.
I have been thinking about the pivot bearings and I may have an
alternative solution soon.
I am away from work for several weeks and would be available to machine
up any ball bearing type pivots. I dont know what the freight would
cost. I know that it only takes a few days airfreight to Europe.
Regards Colin.
Dirk,
On another mailing list there was some talk about using sintered bronse bushings. I would like to launche this question. Does anybody think that it could work with just this? No ball bearings at all? And if so why isn't the bicycle industry using it for the steering axle?
This is a very interesting idea. I am even thinking of a Nylon bushing for the steering pivot. Hope to hear from long time experiences soon.
My BB pivot runs until now smothly for 8000 km. But I had to re-adjust it after the first 100 km (the same with Peter's BB pivot).
Jürgen.
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