Quote Originally Posted by Jonathan View Post
I'm trying to machine a block of MDF thats 3 sheets of 18mm glued together. I need to cut to about 50mm deep...maybe I'll have to do it one sheet at a time then glue them together.
You can get bits designed for slot mortising - see the second cutter down at http://www.amanatool.com/bits-fv/45500.html or http://www.machines4wood.com/mall/pr...sargeant/CM103

I've used them on a manual machine to cut beech and they worked well but you need a light final finishing cut due to the flex.

On the other hand, one of the big advantages of CNC is that you can stand well away from the scene of the accident