This can get quite expensive if you’re not careful. While they’re very hard they’re also very brittle and can shatter easily. You need to care for and store them properly, and be sure not to drop them. One thing to consider is that cobalt bits are quite brittle. You should save your cobalt drill bits for jobs where they out-perform less expensive alternatives. There’s little point using an expensive drill bit for soft materials when a cheaper alternative would do the job as well. This doesn’t really have anything to do with performance, but with price. While you can cobalt bits in softer materials, I wouldn’t recommend using on things such as wood or plastic. They’re most commonly used to cut through hardened materials that steel alone would struggle with.Ĭobalt bits are also quite versatile you can use them in hand drills, drill presses, lathes, and so on. What are Cobalt Bits Used for?Ĭobalt bits have a wide range of practical uses compared to standard HSS drill bits. As well as be suitable to take on harder materials without burning out. The greater heat resistance means the drill bits will remain sharper for longer. Importantly, a higher melting point means the cutting edge is more resistant to the heat generated by cutting. Steel melts at around 2500 degrees F (1370 C), while cobalt melts around 2723 degrees F (1495 C). Also, cobalt has a higher melting point than steel. Manufacturers usually add between 5 and 7% cobalt, but this varies by brand.Īdding cobalt to the base alloy makes them incredibly hard and durable. What are Cobalt Drill Bits?Ĭobalt drill bits are a combination of a base alloy (usually steel) and a small amount of cobalt. Hopefully by the end you’ll know exactly when to use each to get the most out of your next DIY project. In this article I’ll look at the differences of cobalt and titanium drill bits, including their most suitable uses. While their performance is fairly similar, there are applications where one is better than the other. Knowing these will definitely save you some time in choosing the right drill bits for your next project. However there are plenty of pros and cons of cobalt vs. Two of the best materials you can turn to are cobalt and titanium. When it comes to drilling holes, the choice of high quality bits is almost endless.
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