![]() These bits offer precision to users who drill stainless steel and other hard materials. Also, unlike carbide tips or titanium coatings, cobalt drill bits can be resharpened when the tip becomes worn. ![]() ![]() The added cobalt content makes these drill bits harder and more resistant to heat buildup than a typical HSS bit, giving them much greater durability. They are made with a special steel alloy that includes 5 percent to 8 percent cobalt. Cobalt drill bits are an extension of HSS bits. High-speed steel, also known as HSS, is the most common drill bit for metal drilling. Infusing drill bits with cobalt is another way that manufacturers achieve ultrahard drill bits. These carbide-infused drill bits are one strong option when drilling straight into stainless steel. Titanium and tungsten carbide are nearly as hard as diamond, making them ideal for penetrating steel. One way that manufacturers achieve this hardness is by infusing materials that facilitate penetration and protect against overheating.Ĭarbide is one such material found in drill bits for stainless steel. Therefore, a drill bit for use with stainless steel must be harder than the steel itself. Low-carbon steel bits, like those used to drill into wood, do not perform when applied to stainless steel. Stainless steel is an extremely hard material. Read on to learn the factors to consider as you search for the best drill bits for your projects that involve stainless steel. To identify the best drill bits for stainless steel, learning about characteristics like material, coating, frequency of use, and drill bit number are critical. Not all drill bits achieve results in the same way. Photo: Debbie Wolfe What to Consider When Choosing the Best Drill Bits for Stainless Steel
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