![]() ![]() It makes for a much cooler slow-motion video but generally leaves a larger mess. Sometimes called a paddle bit thanks to its shape, spade bits throw chips out as they cut rather than sending it up through the flutes. One of the most cost-effective is a spade bit. As you move beyond a 1/2″ hole diameter, you move away from traditional twist bits into some different options. Twist bits work best for drilling in a myriad of materials when the target is a hole diameter of 1/2-inch or less. Matching the Drill Bit to the Hole Size Twist Bits That’s a good move-you don’t want the one bit you own that’s able to drill through cast iron getting dull on everyday tasks that less expensive bits are perfectly capable of tackling. With a much higher price tag than black oxide and titanium, you’ll want to go the sharpening route to save money.Ĭobalt bits are capable of drilling through just about everything, though most Pros reserve them for metal drilling due to their cost. That characteristic also makes them an excellent candidate to sharpen rather than replace. Because the cobalt is part of the steel blend, its benefits run through the entire bit instead of wearing away like a coating. Cobalt (Steel Blend)Ĭobalt drill bits are made from an alloy of 5% – 8% cobalt. You’ll want to look elsewhere for concrete/masonry and you’re better off using your inexpensive black oxide bits for plastics and composites. Titanium is a good choice for metal and wood drilling. Another is that you’ll need to pay more for these. One of the downsides is that the titanium nitride is just a coating and you lose the benefits as the coating wears off the cutting edges. Titanium drill bits tend to drill faster than black oxide and chips move through the flutes better. This type of drill bit lasts longer than black oxide. The added benefit comes from increasing the surface hardness and creating a thermal barrier that reduces heat buildup. ![]() Titanium nitride is a coating you can use instead of black oxide that does the same job of resisting corrosion and friction. Also, don’t expect to cut through metal other than softer steels under 1/8-inch in thickness. ![]() The downsides are that they don’t stay sharp as long as some of the other twist bit options out there and you lose the benefits as the coating wears off the cutting edges. ![]() It’s a good general-purpose design that’s suitable for wood, softer metal, plastics, and composites that don’t cost an arm and a leg. What are the Best Drill Bits Made of? Black Oxide (Coating)īlack oxide is a coating over the steel drill bit to add corrosion resistance and reduce friction between the bit and workpiece. Each kit includes common sizes you’ll likely need on the job. They range in price from $89 to around $170 depending on the kit. Taking a step up from black oxide, they use a titanium coating and have a hex shank in case you want to use your impact driver. Milwaukee also targets walk-free starts and fast drilling with their Shockwave step bits. Covering 1/2″ to 1-3/8″, retail prices run from $24.99 to $64.99 for individual bits. However, the 5-piece set covers the most common sizes you may need without turning to a rotary hammer.ĭiablo’s step bits start with a 132º tip that prevents walking and drills incredibly fast in our testing. The cost may leave you buying just the specific sizes you need as needed-and that makes sense. These bits run considerably more than black oxide, titanium, or even cobalt bits on average. We also frequently pop them into impact drivers to quickly get through various materials. We use these when drilling through combinations of wood, metal, tile, composites, and-of course-concrete. The carbide tips on the Daredevil Multi-Purpose Drill Bits are tough enough to cut through almost any material. Just like SDS-plus and SDS-max bits, these use tungsten carbide cutting tips. For that, our Pros consistently turn to Bosch Daredevil Multi-Purpose Drill Bits. When you start looking for the best concrete drill bits and the best masonry drill bits, the need for handling multiple materials arises. Hammer drills, however, more than suffice for drilling smaller diameter holes. SDS-Plus and SDS-Max rotary hammers do best for drilling on concrete and masonry materials. ![]()
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