43655
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| posted on 14/4/14 at 12:28 PM |
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Bush/Bearing Options
designing a one-off custom tube chassis car, trying to decide what to do as far as bearings on the wishbones.
I'll be using ball joints of some sort on the outside, Nissan S13 rears are the favourite at the moment.
Will be using 12.9 shoulder bolts, or a stainless sleeve on a regular bolt, so have a good bearing surface.
Options so far are:
Delrin -
Self lubricating plastic, easy machining
Cheap, easy to make.
Needs good alignment, not sure about lifetime?
'Monoballs'
Trade name for spherical bearings with thick o-rings to seal from water/dirt, in theory.
Should allow for sufficient misalignment, should be well sealed
Complicated and very time consuming to make - expensive
Polyurethane/Bronze
Bronze bushes within a polyurethane bush
Allow a little misalignment, good working life, proper bushes
Would need to source correct size polybushes, possible dirt ingress to bronze bush
I don't like regular polyurethane bushes as standard as the stiction in the rubber requiring greasing seems like poor engineering to me. That
and them having caused wishbones to fail is also a turn-off.
So, thoughts, suggestions?
not very useful screenshot but this is the suspension setup
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coozer
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| posted on 14/4/14 at 01:53 PM |
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Rose joints? Good quality NMB ones or spherical bearings in cups?
1972 V8 Jago
1980 Z750
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nick205
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| posted on 14/4/14 at 08:19 PM |
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As above, good quality rod ends or spherical joints in cups. Relatively inexpensive, good enough service life for this type of car and easily
sourced/replaced. IIRC MNR front lower outer joints are spherical bearings pressed into a cup on the end of the wishbone.
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43655
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| posted on 15/4/14 at 07:32 AM |
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sphericals would be nice and dead easy to design in, but i was under the impression their lifetime isn't great?
thinking race rather than road, although none of the other methods have any compliance either really
I'll be using rose joints on the top, being out of the way and not so loaded
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