Cutting oil needed for drilling acrylic?

[ScubaSteve]

Originally Posted by sphelps

Ok but in all seriousness you don't need lube for tapping acrylic, go slow, back out ever turn or so and clean tap. If you do use lube pretty much anything can be used safely provided you can clean it off after.

Agreed. If you are tapping acrylic (and not polycarbonate) you can do it without tapping fluid. Use a 4 flute tap if you can to give you better chip clearance and to reduce chances chipping the edges and threads of the acrylic (you'll need to be careful that you are going in straight).