Hi,

I've got a homemade CNC machine, 3 axis, mostly made of MDF. I'm new to CNC machines.

I want to drill lots and lots of 10mm holes in wood. The holes will go right through the wood and are 45mm deep.

What kind of tool would you use for that?

Right now I've fixed a bosch hand-drill in the machine and I'm drilling the holes with a 10mm brad point drill bit. To get a good finish on the surfaces I'm drill from both sides and meeting in the middle. If I try drilling all the way through it just blows out badly on the bottom surface.

I'm not getting that great a finish anyway (the drill is pulling fibres up) and it is taking an age! The maximum feed speed I'm using is 50mm/min and my program to drill 120 holes is taking over 90 minutes.

I imagine I want to fit the router head and put some kind of end mill in there but I don't know what.

Any help very gratefully received!