Gun Drill Tip Geometry: Point Angles, Clearances, and Rake in Detail
If there is one thing I have learned across years of running gun drills in production, it is this: tip geometry is everything. You can have the best coolant system, the tightest bushing alignment, and the most rigid machine on the floor, but if the tip geometry is wrong the drill will chatter, wear prematurely, or produce scrap. This article is the practical breakdown I wish someone had handed me when I started — what each angle does, why it matters, and how to set it for the material in the spindle. ...