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202 ISCAR CENTER DRILLING %u00bd%u0009Center Drills: Carbide vs HSSHigh-speed steel (HSS) reversible center drill bits are the most popular tools for center drilling. The bits are simple, always available for purchase, and feature low price. This may raise the question: %u201cDo the solid carbide bits offer a real alternative to the HSS bits?%u201d. A seemingly obvious answer may not be so evident, especially in the case of machining difficult-to-cut material (like Titanium, Inconel, etc.). The carbide bit ensures noticeable increases in cutting speed and feed, resulting in higher productivity and reduced machining cost. In addition, the tool life of solid carbide bit is much longer. Therefore, the correct answer requires brief economic calculations, which will show the actual situation for every specific case.MM ECSReplaceable SolidCarbide Head forCentering DrillingHigh-Speed Steel (HSS) Reversible CenterDrill BitsVS