In this design, two additional notches are made in the steel on either side of the original carbide chip. The next iteration of concrete bit design is the four cutter. This is a process known in the concrete industry as embedded carbide. The standard manufacturing process is milling out the steel at the end and attaching a carbide chip, with two edges, using a welding or braising process that connects the carbide to the steel. They just know the bit by the two cutting edges on the end of the bit tip. The most common design in concrete drill bits is the two-cutter, although most users wouldn’t refer to it that way. What can you say about the various bit designs that incorporate carbide? At the tip of that drill bit, the contact point with the work, is some form for carbide. Whether it’s a standard concrete drill bit that goes into a three-jaw chuck tool or an SDS-plus bit or SDS-max bit, the shank is a solid-body piece of steel that’s fluted to ensure material removal.
Users may not know the why of carbide differentiators, but they know the results.Ĭarbide is different from the steel that makes up the rest of the drill bit. Carbide has become a broad term in the industry, but users know that not all carbide is the same. In the concrete industry, carbide is the standard for drilling holes in concrete and masonry because the material offers the robustness to last for a long period of time. The same goes for other cutting accessories: oscillating blades, jig saw blades and reciprocating saw blades. For example, a circular saw blade with standard steel teeth versus a blade with carbide teeth, performance goes up dramatically with the carbide blade. The perception in the industry is that a product with carbide on it is a better-performing product. What drives the universal acceptance of carbide in concrete applications?
Primary attributes of tungsten carbide are robustness and life in harsh applications like drilling in hard aggregate. In the power tool industry, it’s used in accessories as a drill bit tip or on the cutting edge or a blade. It’s formulated to take a solid shape and can be used in a number of different products. It’s a compound of different materials that starts in powder form. His Carbide 101 Q&A will better educate you as to what carbide is and why it’s so widely used in tough drilling and cutting tasks. For concrete drill applications you’ll need a carbide drill bit.īosch Group Manager Tom Grego has provided insight into use, application and best-practice for carbide in drilling applications. Your drill bit needs to be sharp and manufactured of the right material to match whatever you are drilling into. Using the correct drill bit goes a long way towards determining the success of your project.
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