If the pilot drill bit has a point and spur on the end, it's designed for woodworking only. Because the pilot drill is usually HSS or black oxide, these are generally only used for drilling wood and other “soft” materials, not steel or cast iron. They’re capable of drilling the initial hole and then countersinking or counterboring it. Variations on this type of countersink are available for drilling all materials.Īll-in-one: These countersinks have a hole in the middle that accepts a smaller diameter (pilot) drill bit, and often a depth stop. They are designed to countersink an existing drill hole. Standard: These countersinks have a cone-shaped tip and cutting flutes that extend down the sides. When the drill bit wears out, it can't be resharpened or recoated it has to be thrown away. The drawback with TiN is that it's a coating rather than part of the metal. These are efficient at cutting because they’re very hard, low friction, and good at dissipating heat. TiN: Countersinks described as TiN use a titanium nitride coating (a type of ceramic).
#Mac tools drill bits professional
You'll find them in many professional machine shops, but they’re expensive. This creates the hardest and strongest of all drill types. M2: This is high-speed steel with tungsten and molybdenum added, which makes for a much harder material that’s better suited to drilling metal.Ĭobalt: Another improvement on HSS is made by adding cobalt. These are less prone to rust and create less friction, which means greater efficiency. Heat treated: Standard HSS can be improved by heat treating, which results in a black oxide coating. It can also cope with aluminum and other soft metals, but it struggles with steel and cast iron because it tends to overheat and dull quickly. It's excellent at cutting wood, as well as most plastics and composites. It's a proven material used for all kinds of cutting tools, and it forms the base for all types of countersink drill bits. High-speed steel: The cheapest countersink drill bit sets contain bits made from standard high-speed steel (HSS). Gold countersink drills might have a titanium nitride coating for improved performance, but sometimes the color is just for show. Furthermore, we point you in the direction of some countersink drill bit sets that stand out from the crowd.
#Mac tools drill bits how to
We offer you some tips and suggestions on how to get the best job from your tools, and we provide answers to your most-asked questions, as well. In this shopping guide, we delve into the nitty gritty of these features and take a look at functionality. When choosing a countersink drill bit set, you need to consider materials, drill bit type, flutes and shanks, and set contents. Of course you want your project to turn out beautifully, and you’ve come to the right place if you need help selecting the right countersink drill bit set. There are also a variety of solutions for different tasks. It's a simple, efficient concept, but different materials require different drill bits. When you're making something that's held together with screws, the finishing touch is usually to make the head of the screw flush with the surface – or hidden below it – using a countersink, or counterbore. Buying guide for best countersink drill bit sets