The metal contains cobalt, allowing the tools to maintain structural integrity despite the wear and temperature changes. They’re also capable of drilling through most types of wood as well so they’re perfect if you want to use them inside cabinets and other areas where it’s hard to get to the bottom. Made out of cobalt-fortified steel material and coming with a spiral flute design, these bits can withstand high amounts of heat and make sure you achieve accurate results.
If you have ever dreamed of owning a set of drill bits that bore precise holes in whatever materials come your way but have not been able to find one for a reasonable price, then the Irwin 24-piece Drill Bit Set, M35 Cobalt Steel may be your best bet. Irwin 29-piece Drill Bit Set, M35 Cobalt Steel
One of the benefits of using step drills is that they come in different sizes and diameters, allowing you to drill holes of varying sizes in order to produce multiple shapes. Step bits are used in conjunction with hole saws and are most widely used for their versatility in drilling holes into rolled steel before bending it into more complex shapes. Cobalt Step :Ĭobalt step drill bits can be used to drill holes into metal sheets up to the range of 1/4-inch thick. Sure this creates a flat landing pad for your fastener’s head, but it also results in the ridge-like contour forming on top of whatever object you’ve drilled into that used to be flush with its surrounding surface before being counterbored. Unlike countersink bits, which give space for an angled test with offset head bolts, counterbore drill bits let you cut out a much larger area at a shallower depth. Counterbore :Ĭounterbore drillbits like to sit below the surface of the material they’re boring through. The downside is that countersink bits are more complex than standard ones and increase the overall installation time of your hardware by requiring extra steps and effort. Standard twist drill bits have tips that keep them from wandering on their own, but countersink drill bits have no such built-in guidance.Īs a result, you’ll need to create an initial hole for the bit to pass through when installing it and use other methods (tape, clamps) to keep it in place during operation. Countersink :Ĭountersink drill bits create holes that are pushed out from the surface of the material so that a bolt can fit flush with the surrounding. What’s even better is that they are often able to penetrate deeper than normal as well (up to 0.25 inches into the material) so you’ll really be able to get more done with less effort if this is what you’re looking for. This enables them to drill holes which range from small to large in size with just one tool. Stepped bits have a gradually taperred shank from a small entry diameter to a large exit diameter. These pieces typically come as part of sets with up to 30 total parts in each set depending on the size and quality of the bits used. Cobalt twist bits are strong enough to bore into hard metals quickly while also coming in a wide variety of sizes so one is bound to find ones that fit their specific project seamlessly. They are designed for general-purpose use, meaning they can penetrate holes into many different types of materials. The sharp edges of the teeth allow these drills to get into hard materials on a deep level. Twist drill bits come with spiraled rows of teeth that face along the drill shaft. It’s critical to know which application is best for each bit type.
There are four main varieties of cobalt drill bits, each having its own purpose.
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