Drill Bits

The source page is a broad drill-bit reference that starts with the basics: drill bits create round or specialized holes, and their performance depends heavily on geometry such as helix angle, point angle, lip angle and usable length.

It then surveys common materials and coatings. Low-carbon and high-carbon steels sit at the low end, while HSS, cobalt steel, tungsten carbide, PCD and advanced coatings such as TiN and TiAlN support harder materials, higher heat loads and longer service life.

The article also catalogs many bit families, including twist drills, step drills, hole saws, masonry bits, augers and specialty tools for wood, metal, PCB work and deep-hole drilling. For industrial buyers, the practical takeaway is to classify drills by material, accuracy target, hole depth and tool life expectations rather than by diameter alone.