What type of drill bit is commonly used for metalworking?

The twist drill bit is the most commonly used drill bit for metalworking due to its design and functionality. It features a pointed tip that allows for easy penetration into hard materials, including various metals. The helical flutes on a twist drill bit effectively remove chips from the hole being drilled, which is especially important in metalworking to reduce friction and heat buildup, thus preventing damage to both the drill bit and the workpiece. This design also helps in achieving a better finish and precision in drilled holes, making it ideal for a wide range of applications in metal fabrication and machining.

Other types of drill bits, like wood drill bits, are specifically designed for softer materials and lack the necessary features to perform well in metalworking tasks. Similarly, brad point drill bits excel in woodworking, providing sharp points for cleaner holes in wood but are not suited for metal. Spade drill bits are primarily used for drilling large holes in wood and other soft materials, but they are not optimized for the rigidity and precision required in metalworking applications.