Drilling fiberglass

I have a fiberglass seat-pan that i'm going to mount to a metal seat frame (with hinges). I need to drill a couple holes down through the fiberglass to connect the metal to the glass. My question is: whats te best way to drillthrough the fiberglass? its not thick and im worried it will splinter and crack....
thanks guys

sharp drill bit

i figured as much. she wont crack u dont think?......'m great at cracking fiberglass hulls trying to evate the coastguard n shallow water.

Try putting some tape on the underside of the hole, and place the seat-pan on top of a board that you will drill into. Might try using a forstner bit that is nice and sharp. The main thing is that you don't want to apply too much pressure. The stuff actually cuts fairly easily, but is hard/brittle. Will wear your drills quickly, and is prone to cracking. Get ready to have the itchies!

I would use duct tape on either side and start with a small bit also , maybe 3-4mm , then 6mm , then 8-10 mm depending on what you need . Go slow at it too.

Cheers

Moto

Use a Unibit. It won't self feed and tear out a big hole.
www.irwin.com/irwin/consumer/jhtml/unibit/unibit.jhtml

UNIBIT!! thats what those things are .....thats too funny. Im always picking up cheap boxes full of tools at yardsales (busted craftsman wrenches...etc etc) anyway i have 3 or 4 of those unibits and never knew what they were for....but being the pack rat i am, i saved them........for this project I guess!!! thank you guys

Use plastic shims like thay sale at home depot,used in carpentry work. one shim each side, thick to thin and thin to thick, add clamps or spring clamps measure position hole placement and drill, regards Duke

I just drilled my fiberglass seat pan with a regular sharp drill bit with no tape or shims I had no problems what so ever. It drilled straight through though the tape would help.

I used to drill painted control panels on the machines we made. Use several layers of tape,moderate speeds and steady pressure.