which results in a bit that resists up to 1,100 degrees Fahrenheit to drill extremely abrasive materi- als that would normally destroy other bits. Tungsten Carbide is an extremely hard material that will stay sharp longer than other bits. However, because the material is so brittle, these bits are typically made of HSS and “tipped” with tungsten carbide, so the bits maintain strength and cut down on cost. Coatings are another hot trend in drill bits. Heat is the single largest hindrance in the life of the bit, and high-tech coatings help resist heat. A Black Oxide coating can double the life of standard HSS bits for all-purpose drilling in wood, plastic, carbon and alloy steels, aluminum and soft cast iron. Titanium Nitride coating is a very hard ceramic material that can dramatically extend the life of the cutting edge when used to coat HSS bits. Titanium-coated bits will last longer than standard Black Oxide bits and cut through more materials. Diamond powder is another coating used as an abrasive for cutting ceramic, stone and even glass. Diamond bits generate a lot of heat, though, and should be used with water to cool down the cutting process. BRAD-POINT BITS Standard twist bits can wander or skate across the work surface, especially if the bit in question has a wide point angle. In metal- work, drilling a pilot hole can com- pensate for this, but when drilling in wood, it saves time to use only one bit like a brad-point. Similar to a twist bit, a brad-point bit incorporates a spur with a sharp point into the tip of the bit. The sharp point penetrates the work surface to hold the bit in position while the sharp corners surround- ing the spur cut the wood.
The Kik brad-point bits from TG Tools are tipped with six cutting edges to provide 20-percent more cutting surface when compared to standard brad-points.