Originally Posted by
totoblue
I now use my router using an ordinary 16mm router bit. I have a Makita 3612 (very common). I made an MDF jig to do the holes using a standard 16mm router bit...
The jig is just MDF with a circle cut into it...
If you want the hole to be 35 mm, then you need the jig hole to be 35-16 = 19mm bigger than the base of the router (assuming the router base is round).
So if you have a 3mm nail in the centre of a piece of MDF (that's 19mm minus the 16mm router bit), and hold your router hard up against the nail, you will get the correct sized hole...
