Originally Posted by Stan
For 90° grooves, use a regular end mill with the workpiece at 45° or the head tilted to 45°.
That works just fine for a single V groove BUT when you want two Vs separated by
an exact amount it gets VERY tricky. Sure it can be done and I have done it but as
I just said it is DIFFICULT! So I just got two, one a carbide, V cutters from ENCO
and they work a dream. I used the HSS one in Aluminum and the carbide one in steel
for a sliding fixture I just made a few weeks ago.