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Does anyone have contact information to purchase 60 degree bits sizes: 40 and #11 for acrillic?
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FWIW, for the smaller bits (#40, #30), I never bothered to get "acrylic" bits ... just used old, dull bits or dulled them further by drilling into steel, etc. They're so small, never had one crack acrylic. For the larger bits, however, I would definitely go with true "acrylic" bits so as not to crack it. Don't remember if I ever bought a #11 - perhaps bought a 3/16" which is a smidge undersize to #11. I "think" I bought that from a hobby supply or Ebay.
John
N750A
Gerald, another alternative that builders use is a step drill bit. I like them because you can put a chamfer on the hole.
Walt
McMaster Carr or Tap Plastics
Supposedly you can use a regular bit if you run the drill backwards, let the bit melt through the plastic with friction rather than cut/chip its way through rotating the correct way. I have done this on junk plastic when making non-metallic tools out of it, I have never used it to drill something "real" like a conopy. It seemed to work fine drilling the stuff I did not care about.
I have used stepdrills to put holes in plexiglas -- works very nicely, makes a clean hole.
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