I very much prefer single flute countersinks.? And, for brass, just high speed steel, not carbide.
And having it sharp.? If not already sharp (and if from one those inexpensive sets, it might not be very sharp), I sharpen it.? Sometimes all it needs is a few swipes with a diamond hand hone.? They are very handy to touch up edges, and on lathe tool bits, too.? And a slow to moderate speed.
There are a lot of brass alloys of different hardnesses so you might not get quite the same results on every alloy.? (Same with aluminum, if not more so.)? Usually, problems are solved be making the edge sharper.
Charles E. "Chuck" Kinzer
On Thursday, June 13, 2024 at 11:59:26 AM PDT, Peter Brooks <peter@...> wrote:
I¡¯ve got to countersink some brass for screws, and am finding it hard work as the countersink size gets larger.
I¡¯m using a standard 5 flute HSS countersink in a drill press. Are there better options? ?Or any other advice?
