Setting Torque Limits to Prevent Gun Drill Breakage
Spindle torque limits protect the drill from overload. When the torque exceeds the limit, the spindle stops. This prevents the drill from twisting apart under excessive load. I have seen gun drills snap at torque loads just 200 percent above the normal cutting level. A torque limit catches the overload long before that point. Here is how I set up and manage torque limits on my machines for deep hole drilling operations. ...