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. A complete offering of bit sets including the highest quality Titanium, Black Oxide and Cobalt. 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). Member List Calendar Forum General If this is your first visit, be sure to check out the FAQ by clicking the link above. Mo - Max high speed and Mo - Max high speed cobalt ground tool bits. Craftsman, the quality you need and the value you want.

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.

Harder and more heat-resistant than cobalt, making them more chip-resistant. Last longer, allowing drilling of over 15002000 holes before needing resharpening. 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. The table below compares the pros of cobalt and carbide drill bits. 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. Assorted Caterpillar Drill Bits - 1U5397, 1U5402, 1U5403, 1U5407, 1U5408, and 1U5414. The 5-percent alloy is known as M35 grade, and the 8-percent alloy is M42. Makita 714086-A Replacement Pilot Bit, Cobalt, 5/8-Inch-2-1/4-Inch. Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with 5 to 8 percent cobalt. Cobalt drill bits may be used in factories that deal with stainless steel or iron. 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.

Cobalt drill bits sears