Well, I recently received some Micro bits from Amazon. Well they are from China and I bet you can guess what Chinese things do. Break! The first time I used the bits they began to break. All but the biggest ones.

http://www.amazon.com/10Pcs-Print-C...qid=1415510028&sr=8-1&keywords=pcb+drill+bits

These are the bits I bought.

All I want to know is where to get good ones from? Ones that will not break on the first buy. They must fit Dremel 3000 and I do use a Dremel Drill Press.

Thanks!

 

The good stuff:

https://m.mscdirect.com/mobileweb/category?catId=12106101

The cheap stuff, probably similar to what you have now:

http://m.harborfreight.com/micro-carbide-bit-set-20-pc-62379.html

Be sure that your press isn't imparting a lateral, bit breaking, motion and that you're facilitating debris clearance by using a pecking technique and compressed air blow-off.

 

I got a lot of resharpened carbide bits off of ebay years (>10) ago for a penny or so each. I don't know if such deals still exist.

As for breakage, the smaller ones will break if you force them and/or are not using a drill press. They simply will not tolerate being off axis or bent.

John

 

When I was out of bits I used 1mm steel nail with its head chopped off.Drilled pretty good.

 

The last time I check eBay they where all over the place for sale on resharpened bits and can be had for pretty cheap ...

 

The good stuff:

https://m.mscdirect.com/mobileweb/category?catId=12106101

The cheap stuff, probably similar to what you have now:

http://m.harborfreight.com/micro-carbide-bit-set-20-pc-62379.html

Be sure that your press isn't imparting a lateral, bit breaking, motion and that you're facilitating debris clearance by using a pecking technique and compressed air blow-off.

I am assuming that the bits from mscdirect fit a standard dremel 3000? And yes I use a press

 

I simply stopped by a local machine shop and bought a variety of sizes...but then, I only drill bigger holes on perfboards when needed.
I guess I can't help much on this one, but I would like to say I have gotten away with using a cut nail as ISB123 mentioned. Three or four holes is so much different from doing a whole board.

 

research "end mill" bits. specifically ones that are center cutting. unlike drill bits that approach the size of a strand of hair, the small end of an end mill bit flares out and becomes a 1/8 inch shaft. perfect for a dremel tool. also stronger sincr the small drilling portion is shorter than a drill bit. less chance of flex breakage. the solid carbide ones will stay sharp longer if cutting lots of fiberglass.

 

I use Kyocera and Hertel bits bought from MCS which was linked by KJ6EAD.

I have broken two of them by accidentally hitting them with something while they were in the drill press. No casualties when in proper use.

Make sure you order ones with 1/8 in shank to fit in your Dremel, which is what I use.

Bob