Drill bits?

[Bulldog44[TK]]

What are the best drill bits to use when drilling into resin? I bought few drill bits that said they were good for plastic, aluminum, etc. but they dig into the resin too quickly and get stuck. More dangerously they chip off a lot of the surface around where I am drilling.

[Sonnenschein]

I once used drill bits for wood, but I'm no expert. 

 

A small pilot hole helps with chipping.

[Tolo[TK]]

Start with the smallest drill bit and go slowly.

 

 

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[Bulldog44[TK]]

Thanks Karin and Eric.

 

I did do the pilot drill hole method and for smaller drill bits it worked well but once I get past 6mm bits -11 mm bits for drilling holes on the blaster receiver, it just gets stuck.

Haven't tried any wood bits yet but I will try if no other suggestions are made.

 

I tried a step drill bit which works nice but in limited spaces it can't be used.

Edited October 1, 2014 by Bulldog44

[T-Jay[TK]]

Hi Brian, I used standard metal drills for all small and medium holes. That worked fine. Sometimes you will have to free the threads from resin cuttings. Pilot holes are always good.

 

For the bigger holes in the folding stock (11mm) I used a wood drill (see here in the middle of the first posting). A pilot hole was very helpfull to center the drill tip. Drilled with some speed but went down very slowly, so the drill tip scraped off the resin as you can see on my photos.

 

Good luck!

Edited October 1, 2014 by T-Jay

[Bulldog44[TK]]

Thanks Tino. Had a look at your build again and saw the drill bit you are referring to.i just ordered some new metal drill bits and some wood drill bits. I already drilled most of the holes but these will work better next time around.

Appreciate the advice!