Tools & Gear Lathe & Milling Slot Drills - Ball Nose

6016-5/16S 5/16" Short Ball Nose Threaded HSS Cobalt Slot Drill HSS-Co8 (Cobalt) centre cutting, short threaded, ball nose Sometimes referred to as ball cutters, or ball nose end mills. For general milling operations - creating slots and cavities. Commonly used when milling soft steels and non-ferrous materials that produce large chips. Fewer flutes are best for chip evacuation, keeping the bit cooler, but leave a rougher surface finish.