![]() ![]() That doesn't seem like much difference, but together with cobalt's greater heat resistance, it supports higher cutting speeds-depending on the brand and whether the drill is coated, this might mean 50% faster spindle RPM and commensurately higher feedrates. Where "regular" M2 HSS comes in at a hardness of around 62 HRC, M35 starts at 65 HRC and M42 measures 67 or so. Read on.Ĭompared to regular M2 tool steel, M35 and M42 are indeed super. Despite their broad popularity, relatively low cost, and excellent mechanical properties, you’ll soon see why HSS and its cobalt counterparts aren’t always the best cutting tool materials for your drilling application. It’s this last group, HSS, that we’re here to discuss today, along with that most widely used of all cutting tools, the drill bit. These include D2, A2, H13, S7, and other tough, heat-treatable, and wear-resistant metals used to make everything from plastic injection molds to stamping dies to high-speed steel (HSS) cutting tools. This list is by no means complete, but we’d be remiss in not tagging a few members of the tool steel family. Steel and all its many alloys-stainless among them-range from “cuts like butter” to “why do I keep breaking tools?” There’s soft, stringy aluminum and polymers like ABS, Nylon, and Teflon.Ĭast iron is relatively abrasive but nowhere near that of glass and fiber-filled composites. Nickel-based superalloys like Inconel and Hastelloy are called “super” for a reason. Drilling slowly at first will help prevent wear on both your material and your bit, so don’t rush things! Once all is said and done, clean up any dust or debris created by drilling before moving on to other tasks.Machine shops, maintenance personnel, and the manufacturing community overall face off against a veritable universe of different materials each day: As you begin drilling, keep an eye out for any sparks coming from the hole if none are present after a few seconds of drilling, increase your speed until sparks appear again. Now that everything is set up correctly, it’s time to begin drilling! Start by setting your drill speed at a moderate level – too slow, and you won’t penetrate the metal too fast, and you’ll overheat your bit. This is especially important when drilling larger holes, as off-centre drills can cause unnecessary wear and tear on both your bit and your material. You can do this with a pencil or marker, but it’s best to use a center punch so that your bit will stay centred when drilling into the metal. Once you have your drill bit ready to go, it’s essential that you precisely mark where your hole should go. It’s also important that your bit be sharp if it isn’t, it may struggle to penetrate the hard surface of the metal. Cobalt-tipped bits are designed explicitly for hardened metals such as stainless steel and will give you better results than standard twist or masonry bits. Several types of drill bits are available on the market, but for most applications in stainless steel, you’ll want to use a cobalt-tipped drill bit. When drilling into stainless steel, the key to success is selecting the right drill bit for the job. ![]() With a few essential tools and techniques, you’ll be able to get the job done in no time! First Things First – Select Your Drill Bit This guide will walk you through all the steps necessary to drill into stainless steel successfully.
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