Re: [TCML] Primary Support Materials

[Joe Mastroianni <joe@xxxxxxxxxxxxxx>]

Hi Brandon,

I've had little luck gluing UHMW or HDPE, even with various types and 
grades of epoxy. I've been able to tap both, and drill both with no 
problem. I've used both brass and nylon screws which all hold well, as 
long as you don't over tighten, as you can imagine. Machining - as in 
turning on a lathe, has been more difficult. I've yet to find the 
tool/speed combination that gives me a clean cut.

I do not have that problem with PVC, which I can glue and machine on my 
lathe to my heart's content. Moderately slow speed any nearly any lathe 
tool I want to use works well with PVC. I have also had success 
machining polycarbonate.

Both PVC and polycarbonate respond well to glues. Though, polycarbonate 
wants to be glued with acrylic cement, which bonds it so completely 
there is no longer two disparate pieces of material. I have not had as 
much luck with epoxy and polycarbonate, though the last time I tried I 
think I got the mixture between components screwed up, so the epoxy 
didn't harden correctly on the polycarbonate.

PVC glues well with epoxy. I've used 5 minute epoxy to glue PVC caps 
into all my secondaries.

Cheers,

Joe

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