Some people talk about cobalt drill bits and HSS drill bits like they were the same thing, and others say they are completely different. This article will explain the differences between HSS and cobalt drill bits, and what those differences actually mean to you.

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HSS drill bits (High Speed Steel drill bits) are the most common type of drill bits on the market today. They come in a huge variety of types, shapes and materials, and each is designed to do one or more jobs particularly well.

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Even under heavy use, the exceptional hardness of cobalt drill bits mean they maintain the sharpness of their edge longer. They even resit rusting longer than most other types of HSS bits, so tey are easier to store.

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In the end, you can use cobalt drill bits in faster drills than standard HSS bits as well. There are many situations where you could use a cobalt bit dry when you would need to use cutting fluid to cool another type of HSS bit, for example.

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HSS drill bits were invented to cut into steel and other metals, but they are also very effective at cutting other materials, such as wood or plastic. There are 5 kinds of HSS drill bits, one of which we’ll look at in more detail below.

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Cobalt drill bits Are the best of the best for cutting into hardened metals like steel. Most have between 5% and 8% cobalt. Because pure cobalt has such a high melting point (1495OC), it conveys a higher melting point to the steel. That means you can push it farther and harder when cutting metals, and it won’t soften or deform.

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Jul 29, 2024 — Work hardened wear steel is a type of steel that becomes harder and more wear-resistant when subjected to mechanical stress.