![]() ![]() They also perform well on stainless steel.īlack and gold drill bits are manufactured by coating high-speed steel in a combination of black and gold oxide. These bits last longer than standard metal drill bits and are suitable for general applications, such as drilling through wood, plastic or metal. The titanium coating increases the drill bit’s surface hardness, lowers friction coefficient and offers increased corrosion protection. Titanium drill bits are produced by coating high-speed steel with a thin layer of titanium nitride. Cobalt drill bits are the longest lasting and most durable products available on the market. Due to cobalt’s hardness and high-heat resistance, these bits are particularly useful when drilling into hard materials like stainless steel and cast iron. Having a better understanding of these performance characteristics will make it easier to select the correct drill bit for each job that comes your way.Ĭobalt drill bits are manufactured with high-speed steel and five per cent cobalt in their composition. While the base of most drill bits is composed of high-speed steel, many specialized bits are combined and coated with a variety of different alloys. Today, there is an endless selection of drill bits available on the market. Regardless of the drill a contractor uses, drilling will only be efficient and accurate if the proper drill bit is selected for the job. Whether it’s plastic, wood, metal or concrete, every material that is drilled into offers a unique set of challenges. A common challenge for contractors is choosing the right drill bit given different drilling conditions. ![]()
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