They can be operated at much higher speeds than a standard HSS drill bit. By combining a small amount of cobalt with another alloy, the results are incredible.Ĭobalt drill bits are incredibly strong. Cobalt has a melting point of 1495☌ and a boiling point of 2927☌, which makes it perfect for use at high temperatures. What are cobalt drill bits?Ĭobalt bits are a combination of steel (or another alloy) mixed with a small percentage of cobalt, typically between 5 – 7%. If you’re using HSS drill bits for long periods or at high RPMs, you may need to use cutting fluid to keep the bit cool. Over time, HSS drill bits can become blunt and need to be sharpened, which demands specialist tools that aren’t always available. They’re safe to operate at high speeds (RPM) and provide long-lasting performance – as long as they are maintained. HSS drill bits are capable of safely drilling through hardwood, some metals and plastic. The large concentrations of chrome and nickel in stainless steel ensure that HSS bits are super strong and durable. HSS bits are hardwearing and heat resistant. In this article we describe the difference between High-Speed Steel (HSS) and cobalt drill bits, their strengths and weaknesses, and when you should use them. When it comes to drilling, selecting the right tool for the job is crucial. Sturdy, hardwearing and robust, modern metal drill bits can cut through the toughest materials with no trouble. The Difference Between HSS and Cobalt Drill Bits

Titanium or cobalt drill bits