I believe the same bit that's used for glass. I was going to wait until I knew exactly what diameter hole I wanted, and then purchase it. ----- Original Message ----- From: Susan Welenofsky<mailto:welenofsky@comcast.net> To: 'Greater Seattle Aquarium Society member chat'<mailto:gsas-member@thekrib.com> Sent: Friday, November 19, 2004 1:22 PM Subject: RE: [GSAS-Member] Tricks & Tips for drilling a plexiglass tank? What kind of drill bit is used for Plexi? I would like to know, because, I drilled a bunch of holes in it, and some of the holes cracked the acrylic sheet. Susan -----Original Message----- From: gsas-member-bounces@thekrib.com<mailto:gsas-member-bounces@thekrib.com> [mailto:gsas-member-bounces@thekrib.com] On Behalf Of A JACOBSON Sent: Friday, November 19, 2004 1:12 PM To: Greater Seattle Aquarium Society member chat Subject: [GSAS-Member] Tricks & Tips for drilling a plexiglass tank? This weekend I'm going to be drilling a Plexiglas tank lid (black plastic) to mount lights and hinges. Other than getting the right bit, and drilling slowly, are there any other special tricks I need to do to avoid stress cracks, etc.? Anita _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com<mailto:GSAS-Member@thekrib.com> http://lists.thekrib.com/mailman/listinfo/gsas-member<http://lists.thekrib.com/mailman/listinfo/gsas-member> _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com<mailto:GSAS-Member@thekrib.com> http://lists.thekrib.com/mailman/listinfo/gsas-member<http://lists.thekrib.com/mailman/listinfo/gsas-member> _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member