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Cobalt Mortgage Kirkland

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Cobalt Alloy Drill Bits – Currently The Hardest Drill Accessory

As you probably already realize, there are many different drill bits each with a specific usage. Strength is a big part of design differences, as drills are made specific to the hardness of material to be drilled through. The vast majority of drill bits are cast with spiral grooves. Bits can also be coated with specialized materials such as carbon or ceramics. But which are the very hardest drill bits? Cobalt steel drill bits make holes possible in metals a bullet wouldn’t penetrate. In fact cobalt drill bits can be used to manufacture rifle parts.

Cobalt drill bits are actually made of steel. They get their name because the steel alloy contains more cobalt than usual – examine HSS drill bits to get more data pertaining to this area. A key characteristic they have is maintaining their cutting edge at extremes of heat. Your average drill bits, when pushed through metallic sheets, quickly become blunted. They can literally start to melt due to the friction. The advantage of the hardness is offset by an increase in brittleness, which can be worked around through careful usage. Even with these bits it’s a good idea to use lubricating fluid to reduce temperature build up – take a look at electrician courses for supplemental data relating to this topic.

The advantage of being able to drill through heavy metals is obvious, but be aware that not all cobalt drill bits are alike. The percentage of cobalt in the alloys varies depending on the manufacturers specifications. The grades of cobalt bits are the M35, which has 5% cobalt, and the M42 with 8% cobalt. The M35 is preferred for uses where the bit will be heated beyond the norm, and the M42 used for longevity as it is less likely to be damaged.

Cobalt is used in steel alloys for its resistance to wear and corrosion. It does not reduce the magnetic properties of steel, which is very useful should you drop a cobalt drill bit, as you can find it with a magnet like you would ordinary drill bits. To give you an idea of the durability and usefulness of the alloyed metal, it is also used in jet engines and prosthetic hip replacements. The cobalt in the steel alloy sets these bits apart from their high-speed steel brethren.

The creation of cobalt alloys makes it possible to drill through hardened metal, titanium, and cast iron. They will withstand temperatures are higher than thousand degrees Celsius without reducing effectiveness. In addition these bits are often cast in a layered framework to further enhance strength and decrease the chance of breakage.