How to cutg polyurethane bushes

[rcx132]

I've gone for generic bushes for my wishbones because the originals are only available in America. What I've bought is the nearest size that matches. The length needs shortening and the top hat needs thinning a couple of mm.

Shortening the bushes isn't critical because the end of the bush isn't a bearing surface. But thinning the top hat needs to be done carefully because the top of the tophat bears against the chassis.

Any ideas for how to trim them?
I've got access to a lathe, or sand the them?

 

[pedrobedro]

Hotplate and trim them with a craft knife back to the centre bush ?

 

[optima21]

I use a slot drill as cutter in the tool post like this last time I turned a polyurethane bush down

 

[Ton-up]

There was a thread on this recently. Make a parting type tool like a upside down knife, extremely thin and sharp. You need to slice it rather than machine it.

 

[rcx132]

There was a thread on this recently. Make a parting type tool like a upside down knife, extremely thin and sharp. You need to slice it rather than machine it.

What's the best way to find that thread? I want to get it right first time.

 

[Ton-up]

http://www.mig-welding.co.uk/forum/threads/poly-bushes-on-a-lathe.70203/#post-941932

 

[rcx132]

what vehicle is it for?

It's my Vitara that I'm restoring. But the car is fitted with an aftermarket suspension kit, so the OEM bushes won't fit.

 

[Streetwerks]

You could get in touch with lou brooks at brd. He makes custom bushes

 

[rcx132]

You could get in touch with lou brooks at brd. He makes custom bushes

Next time. I've already bought a set. My machinist friend will try to trim them on Tuesday,