Dec 12, 2019 · I've got some cobalt bits. They do work well, especially if you've got to drill harder stuff like steel, stainless, etc. The only drawback is they are very brittle. Small diameter ones …

Mar 18, 2025 · These powerful drill bits for cast iron, aluminum, and even stainless steel are made of a steel alloy of 5 percent to 8 percent cobalt. We researched dozens of cobalt drill bits and …

May 24, 2021 · Following are the steps to sharpen a cobalt drill bit. Examine your dull bits. Your goal is to urge rid of merely enough metal to get a sharpened edge. Many bench grinders have …

Mar 16, 2025 · Dull Bits. If your cobalt drill bits are not cutting as well as they used to, they may have become dull. Dull bits can be caused by a variety of factors, including overheating, using …

New cobalt drill bits are a dull gold color, making them distinctive on the shelf (or in your toolbox). The color occurs when the drill bits are baked in the process of production; it’s not a paint or …

Mar 18, 2025 · Cobalt drill bits are known for their durability and can last up to 10 times longer than standard high-speed steel bits. However, the lifespan of a cobalt bit can be shortened if it …

Dull bits are caused when either the chisel is having trouble smearing the material to the lip and needs to be re-defined on the face of the bit. Or, the lip is rolling over and needs to be re …

Mar 19, 2025 · That’s where cobalt comes into play. By adding cobalt to the steel blend a drill bit is made of, it increases the hardness to a higher level than other bit compositions. These …

Mar 29, 2021 · Cobalt drill bits are more expensive, but offer longer life, and are more resistant to heat than titanium drill bits. Cobalt drill bits are also tougher and can drill holes in the hardest …

Mar 11, 2024 · Regular drill bits can become dull or even break under these conditions, but cobalt drill bits can handle the heat. The cobalt alloy helps to dissipate the heat and prevent the drill …