How do you drill clean holes in linen-filled phenolic?
I'll admit that I haven't tried it yet, but I'm thinking that if I use a
regular twist drill it'll be chip city.
It's 1/8" thick flat material, I'm planning on some 3/32" holes and some
You've got thin material that will ride up the drill unless clamped
securely and backed up with sacrificial material. Might be okay with
maximum spindle RPM (8000+ isn't too fast with carbide), particularly
if you drill a smallish pilot hole first.
It's been a few decades, but it actually machines quite well. As the
inexpensive, non-magnetic, reasonably strong insulating material of
choice I used a LOT of in in various plasma-physics related work. Sharp
tools - and carbide is a good idea, as it makes most softer tools dull
quickly (but they will be fine if you're only doing a few holes and they
are sharp to begin with.)
1/8" is a bit on the thin side.
If you do have problems with drills, try end-cutting endmills, solid
carbide, - if you don't have a mill, in a plunge router clamped to the
work (get 1/4" shank endmills so you can find a router collet to fit.)