Cobalt drill bits sears8/31/2023 The ability to withstand such high temperatures without breaking down makes the cobalt drill bit about 30% faster in drilling applications than other types of high strength bits. Milwaukee Tool Cobalt Red Helix Drill Bit Set for Drill Drivers (15-Piece) Model 48-89-23041176. Since such drill bits are designed to handle high temperatures during the cutting of tough materials, they are rated to withstand prolonged heat of up to 1,100° Fahrenheit (593° Celsius). Even though cobalt bits are superior in many ways to other types of drill bits, it is still recommended where possible to cool the drilling location with oil while cutting to enhance the life of the drill bit. Member List Calendar Forum General If this is your first visit, be sure to check out the FAQ by clicking the link above. The surface of the bit is also heat-treated in the manufacturing process, which gives the metal a brownish-gold tint that makes it easy to distinguish from other types of drill bits. It can therefore be used to drill stainless steel and other hard materials. DAREX Corporation Drill Doctor(s) renews dull high-speed steel, cobalt or carbide twist drill bits with pencil sharpener ease. The cobalt drill bit will dissipate heat. However because of the low melting point of aluminium a better choice would be to use a cobalt drill bit. Aluminum is a soft metal and therefore a standard HSS drill bit will be able to drill into it. ![]() Cobalt drill bits can drill at much higher temperatures while maintaining sharpness. Otherwise the melting aluminum will stick to the drill bit. When a metal drill bit containing cobalt is manufactured, it often contains other elements like carbon and titanium for hard surface drilling and black oxide for softer drilling in aluminum and rigid plastics. Cobalt Drill Bits Drill Bits for Metal Precision Ground Cobalt drill bits are stronger and harder than Titanium bits but are more brittle and should be handled with care. ![]() Cobalt drill bits may be used in factories that deal with stainless steel or iron. In those cases like when drilling through tough pieces of metal cobalt drill bits are a much better choice.
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