Last longer, allowing drilling of over 1500–2000 holes before needing resharpening The table below compares the pros of cobalt and carbide drill bits. But in terms of strength, solid carbide drill bits are superior, with a hardness of 75 HRC and cobalt’s hardness of 65 HRC on a Rockwell scale. Cobalt Drill Bits ProsĪs we have seen, both drill bits are made from high-grade materials and perform well. Cobalt drill bits are best used on tool steel, stainless steel, and other hard ferrous metals. Cobalt is added to the stainless steel alloy (Iron and Carbon) during formation, enabling resharpening without losing the drill bit’s cutting quality. This combination improves the heat and wear resistance of the drill bit, making it durable. What is Special About Cobalt Drill Bits?Ĭobalt drill bits are primarily made from a 5–8% cobalt concentration and high-speed steel. Carbide drill bits are not suitable for hand tools such as impact drills or cordless drills but are generally ideal for high-production drilling. Solid carbide drills are efficient in high-speed drilling and are used on fiber-glass reinforced plastics and hard, non-ferrous heavy metals.Ĭarbide is the hardest and most brittle drill bit in use today and gives a magnificent finish. This mixture helps increase metal cutting speeds and feeds, giving it a durable tool for cutting edges. What is Unique About Solid Carbide Drill Bits?Ĭarbide drill bits are made of tungsten carbide, a combination of carbon and tungsten. SCTools is committed to helping you machine better, and we will give you a detailed breakdown of these two drill bits and help you choose the ideal one for your machining needs. This simple explanation is not enough to make an informative decision on which one to buy. You have probably heard that solid carbide drill bits are the most efficient, and cobalt drill bits are durable. To keep your manufacturing company at the top, you need to acquire durable and efficient drill bits, such as carbide or cobalt, to work on tough materials. High-speed steel drill bits are sometimes ineffective at drilling tough metal to produce spectacular results. The initial and the most difficult risk that we need to take is to become honest. “It is only when we take chances, when our lives improve.
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