drilling brass?

[Peter Griffin]

Irving

The cutting edge of the drill needs to have a negative cutting angle. Grind a flat on the cutting edge. This way the drill can't snatch.

[irving2008]

Sorry Peter you'll have to explain that more

[Robin Hewitt]

The cutting edge of the drill needs to have a negative cutting angle. Grind a flat on the cutting edge. This way the drill can't snatch.

That could work. But obviously we aren't explaining it very well.

The problem is probably 'engineering speak'.

Brass 'snatches' where other metals 'dig in'. It has a word all of it's own, probably because it does it so well.

If Irving, thinks 'dig in' rather than 'snatch' then the 90 degree, or more, rake angle might make more sense.