I'm working on a fun project to create string lights using LEDs embedded in plastic dice. To get started, I need to drill 5mm holes that are about 10mm deep. Right now, I only have wood and metal drill bits, and I'm wondering which would work better for this job. I'm considering using the steel bit since it doesn't have that 'pin' at the tip and seems to drill more directly. However, I'd love to hear what everyone thinks about this. Am I on the right track, or is there a better option?
3 Answers
It really depends on the type of plastic you're dealing with. For thin, soft plastics like polypropylene, a step drill or spade bit with long spurs works best. If you're working with harder plastics like acrylic, just take it slow with regular bits, and make sure they’re not too sharp or they could melt or shatter the material. To avoid breakage, use a scrap piece of wood underneath your work to absorb some of the pressure.
I’d say go with the steel bit. I've had good results using standard drill bits for softer materials like plastic, too. Just remember, drill speed is important—keep it low to avoid heat buildup which can melt the plastic. If you're really unsure, try a few different bits you already have and see which works best!
Thanks for the advice! What speed do you usually recommend for drilling into plastic?
For drilling into plastic, brad-point drill bits are your go-to option! These have a sharp point in the center to help you drill precisely where you want, and their flutes cut the outer diameter first. This means you'll end up with a much cleaner hole than you would with regular bits. They're available at most hardware stores, and they'll definitely make your project easier!
Absolutely! Brad-point bits are the way to go for neat, clean edges.
Good tip! Using a wood backer helps prevent cracking.