Have a 20+ year old NOS ramp that needs a few more holes in it, some of the mounting holes are missing for some reason. I'm a bit terrified of destroying it, figure it's probably more brittle than it was 20 years ago. What's the proper way to drill it out without cracking it? I really don't want to destroy a new $90 ramp. Was thinking drill press, sharp metal working drill bit, and backer block of wood? Any suggestions or tips welcome, thanks!
Use a "brad point" drill bit - there will be less potential for chipping due to the "wings" on the outer edges of the bit.
Quoted from Out-West:Search "tap plastics" for drill bits for plastic, the cutting edge is at a much steeper angle, (60 degrees).
Awesome, and they even have a handy 'how to drill plastics' PDF on the bits page. Thank you very much!
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