Quote Originally Posted by Doddy View Post
why PTFE?, out of interest?.
It's just what springs to mind when I think of plastic bushing materials.
I know Nylon is used a lot, but I think PTFE is just a little softer and more appropriate for aluminium.
It's an engineering sensibilities thing.

I've ordered a bit of PTFE and some nylon roller bearings.. I'll post something when I've done it and
see how much of an improvement it makes.. if any.

I also got a sprung diamond drag engraver for about 30 quid.. Which is actually very very good.
It cuts vinyl really nicely. I'm hoping it'll make some nice drag engraving work on aluminium too.
We'll see.