Where to find #30 & #27 plexi-bits?

[kevinl4000]

I found fractional-inch sized plexi bits on our favorite RV tool suppliers' web sites but I haven't been able to find numbered size plexi bits, specifically #30 & #27 (for landing light lens).

Can anyone help me out here? Thanks.

[DHeal]

Many builders don't obsess about the exact drill size. If you are drilling into plastic (plexi or Lexan), a slightly larger drill size is preferable to better deal with potential plastic expansion/cracking. I used my UNI-BIT drill for most of the holes in plastic - it worked great. YMMV

[RFSchaller]

I use the dull drill bit instead. Run a cheap bit on concrete for 5 to 10 seconds so there are no sharp edges to grab the plex. Make sure the plex is warm to reduce the chance of cracking.

[Breezy]

I've used the dulled in concrete method, it worked well. Otherwise, McMaster/Carr has plexi bits.

[Low Pass]

Originally Posted by Breezy

I've used the dulled in concrete method, it worked well. Otherwise, McMaster/Carr has plexi bits.

Ditto modified bits. But practice on some scrap to get the feel. Not too tricky, but it only takes one crack...

[kevinl4000]

I'm splitting the difference: I ordered the #27 from McMaster-Carr so I don't crack or chip the lens, and I'll dull a used-up #30 on concrete as suggested.
Thank you all for your replies.

Kevin