Subject: Machining polyurethane

From: [email-masked] (Andy Dingley)
Date: Thu, 26 Sep 1996 23:00:55 GMT

Having yet more problems with the rubber shock absorber bushes on my
Range Rover (see other post), I'm considering changing them for
polyurethane. I already have a set of polybushes in the main
suspension components, but I can't find anyone who sells polyurethane
shock absorber bushes.

Any advice for making my own ?  Recommended resins ?  Techniques ?
How do I set about vacuum degassing this stuff as it cures (I have
access to a vacuum pump).  I'll probably need to machine it
afterwards, so any advice on turning it ? I'll need to bore a
reasonably accurate centre bore, and a less critical taper on the
outside surface.

--
Do whales have krillfiles ?

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From: frank <[email-masked]>
Date: 26 Sep 1996 23:42:16 GMT

My Energy Suspension catalog shows dozens of polyurethane shock
eyes for sale, plus a thousand or so other bushings.

I've heard that if you pack urethane in crushed dry ice for
a while, you can take it out and pretend that it is steel.
Machine as you like it.