The type of drill bit will depend on the quality of the metal. Which drill bit should you use for hardened steel & stainless steel? ![]() Regular drill bits are used where accuracy and cut control are unimportant. Tooling bits are also referred to as machine grade or machine-shop grade, due to their predictability in a controlled cut or machining operation. Although they both look the same, tooling bits are superior in quality of materials, grind angle (lip), diameter tolerance and how straight the bit is formed. What are the differences between a “tooling” Bit and a regular drill bit?Īccuracy in cut quality and capability. Titanium nitride (TiN) is a good example, which can last up to six times longer than high-speed steel bits. Moreover, some bits have a special coating that is applied in the manufacturing process in order to reduce friction and dissipate heat. Although these bits are more expensive, they are capable of boring more holes and sustaining this capability longer before becoming dull. Cobalt or black oxide for example are better for these applications. However, to drill through abrasive metals such as cast iron, stainless steel, or hardened steel, the drill bit has to be harder and more capable to retain its cutting capability. High-speed steel is the least expensive and most basic drill bit which is fine for most metal-drilling tasks. This is not a “one size fits all” application. Therefore, the task of selecting the correct drill bit is just as important as selecting the correct speed. high-speed steel, black oxide, cobalt steel, and titanium nitride) require the drill bit to cut quickly and accurately. ![]() ![]() However, when it comes to drilling material with a higher carbon content or chromium oxide (stainless steel), ferrous metals (ex. In its basic form, it is best used for drilling softer materials such as wood or non-ferrous materials like aluminum, brass, lead, etc. Steel is the most common material used for drill bit production. There are many different types of metal combinations used for manufacturing drill bits.
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