![]() This leads to chipping and other damage when drilling materials that are too hard or attempting to drill at temperatures outside the specified range. These drill bits also can’t work at the drilling speeds carbide drill bits are capable of.Ĭobalt drill bits also tend to be brittle. ConsĬobalt drill bits don’t last as long as carbide drill bits, requiring resharpening after more or less every 100 holes drilled in a production environment. These bits are also affordable and easily available. You can use a cobalt bit for drilling both wood and metal. It can cut soft as well as hard materials. Since peck drilling repeatedly restarts the cut, wear increases markedly. This wear decreases significantly once the drill bit’s tip is engaged with the material. The most significant amount of tool wear on drill bits occurs when starting a cut. This increases tool life since peck drilling dramatically increases tool wear. This eliminates the need to drill guide-holes, decreasing cycle time.Ī cobalt bit can drill up to five times their shaft diameter before requiring peck drilling (inserting the drill bit into the cut multiple times to facilitate proper cutting). The cost of the drill bit justifies the extra cost of grinding a self-centering point on the bit. They are easily resharpened and usually less expensive than carbide drill bits.Ĭobalt drills often have self-centering points. ProsĬobalt drill bit can withstand far greater temperatures than the cheaper bright HSS and black oxide drill bits. This allows it to be resharpened without losing the cutting quality of the bit.ģ Flute Cobalt Drill Bit – Click to See DetailsĬobalt drill bits are often used on stainless steel, tool steels, and other hard, ferrous materials. Unlike a titanium drill bit which is a coating, cobalt is added into the alloy. This enhances the wear- and heat-resistance of the drill bit, prolonging material life. What is a Cobalt Drill Bit?Ĭobalt is often incorporated into drill bits made of high-speed steel (HSS) at a 5-8% concentration. Carbide drill bits enable greater cutting speed while maintaining a high-quality finish than cobalt drill bits, enhancing manufacturing throughput. This leads to longer tool life, often offsetting the cost difference. Cobalt bits are made of HSS with cobalt blended into the alloy mix whereas carbide bits are made of sintered tungsten carbide.Ĭarbide drill bits are generally more expensive than cobalt but can withstand higher temperatures and have greater wear resistance. Higher-end drill bits are often made of carbide or cobalt. Why is this, and what’s the difference between these two options? How would you know which option to choose? Difference Between Cobalt and Carbide Cobalt drill bits are often more expensive than other standard drill bits, but if you regularly drill through metal, they are a good investment since they tend to last longer.Carbide and cobalt drill bits are often used in applications where high-speed steel drill bits aren’t sufficient. Select a drill bit with the combination of material, finish, length, and style that will be best-suited for your job. Goebel premium cobalt drill bits are particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too.Ī number of factors determine which drill bit will be best for an application, including the type of material to be drilled, drilling speed, and desired number of holes per bit. High speed steel (HSS) cobalt steel bits have better heat and wear resistance, so they can run up to 25% faster and have a longer tool life. They are for use in both hand-held drilling and machine-tool applications. High speed steel (HSS) cobalt steel bits are heat resistant and maintain their sharp edges when drilling hard material. The short flute and length keep these bits straight for accurate placement when starting holes that will be drilled deeper with a longer bit also known as spotting drill bits. Goebel premium high speed steel (HSS) cobalt drill bit design gives you the best point for optimum penetration and flute geometry assuring constant chip ejection. With an extended tool life, Goebel cobalt drill bits will give you the lowest cost per hole drilled. These cobalt drill bits are designed for the drilling of tough and abrasive materials, high temperature alloys and stainless and heat treated high strength steels. Goebel premium high speed steel (HSS) cobalt drills give you longer tool life than ordinary cobalt drills reducing the cost per hole drilled. high speed steel (HSS) cobalt drill bits are made from premium cobalt steel to provide superior hardness and are very resistant to abrasion.
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