Drill bits for homemade PCBs?

[TTL]

On a sidenote: apart from the carbide drill bits, what kind of electric drill would you suggest I get for drilling PCBs?
I understand Dremel is the general consensus when it comes to these kind of things, but there are so many types with differing specs.

Are there other things in electronics such a multi-tool may come in handy, or could I just as well just get a cheaper "electric drill" (as opposed to "electric multi-tool") for this use?

 

[CDRIVE]

Just about any high speed (=>10,000RPM) rotary tool that accepts 1/8" collets will work well. This includes Routers, Trim Routers, Dremels, etc. IMHO, all of the above should be affixed to a drill press type arrangement. Though it doesn't matter if the rotary tool moves along the "Y" axis with the drill table stationary or the reverse like a machinist mill, where the milling table moves along the "Y" axis.

I will readily confess that when only making a few holes I've opted to use my drill press on its highest speed.

Cheers,
Chris

 

[tilup367]

The problem comes from the rotation speed and the pressure when drilling with the press drill. If i take constant and formula from the machinery handbook. As an exemple, the correct rotation speed for 0.7 mm drillbit in alloy-copper : 20 571 rpm. And for the pressure, if hand-push with press drill, you must be slow because those drillbit are really fragile. Other exemple : 0.2 mm drillbit @ 72 000 rpm in alloy-copper, 1.2 mm drillbit @ 12 000 rpm in alloy-copper. In general rule : the smaller, the faster. But at my home, i have a press drill up to 4200 rpm and cartridge drillbit 0.2mm to 1.2 mm. I Run it at maximum speed and slowly hand pushed down, it work perfect and the pcb held thigh with "c" clamp on the press drill work table.