"DoN. Nichols" wrote in message
...
On 2016-11-29, Bob La Londe wrote:
So... any words of advice on counterbores?

.....
Of course -- you *can* simply use a two-flute center cutting end
mill to counterbore before you drill for the screw's shank and not
need
a piloted counterbore at all -- but if you are doing the
counterboring
in a place where the milling machine can't reach -- the changeable
pilot
counterbore might be the only thing which can reach and works.


I haven't had a problem countersinking with a 4-flute end mill, all I
had in that size, after drilling the screw shank hole.

-jsw