Drill Bits and their versatility in materials and coating

Posted by Drillbit Warehouse
1
Dec 24, 2015
214 Views
From house renovation to building construction, drilling plays a very important role to finish them all. Drilling tools, hence, is used to solve the purpose of boring holes in various types of materials. Every type of drill bit has a specific nature and is meant for boring holes in a specific type of material. So, you should always use the right bit, according to your drilling need. Suppose, you have the requirement for boring a large and deep hole in thick wooden surface, then you should use the auger bit. For boring holes in a brick wall, you should have a masonry bit.

Spade, Forstner, Brad-point, Twist, Countersink, etc. are some common type of bits available in the market. Apart from the material, the type of drilling tool also depends on the size of the hole. Well, these bits are also manufactured with several types of metals and coating. Let’s take an overlook of them so that, you can decide which one can best fulfill your drilling need.

Material:

First off, you should have the basic idea about the materials which is being used to manufacture these bits. It is must to understand the type of material so that, you can buy the right tool. If the requirement is for boring holes in soft wood, then low carbon steel is the best material. On the other side, high carbon steel is used for hard wooden surfaces and hard metals, but can’t perform well on industrial jobs.

For industrial jobs, high speed steel can fulfill the need with its high heat-resistance capability and long life. If you need a bit for heavier duty jobs, then Cobalt alloy steel is the perfect material with its hardness which can be used for frequent drilling. And the last one is the carbide, which is harder than others but, has brittle in nature as well, so be careful while using it.  This is especially designed for production drilling, for the hardest materials.

Coating:


As material is important in drilling tools, the coating also has the same importance for finer and more finished jobs. The coating helps in extending the life of drill bits. Most of the bits have coating of black oxide. This coating protects the bit from heat and helps the bit in drilling holes. Few bits are coated with Titanium which also does the same job, but provide a high level of protection from heat in comparison to black oxide coated bits.

In Titanium range, the Titanium Nitride generally increases the life of the tool, and is good for fast drilling. Titanium carbonitride on the other side provides better resistance than other coating for stainless steel, aluminum, and cast iron. And, titanium aluminum nitride is used for coating high-alloy carbon steels, nickel-based materials for the same purpose.

So, the material and coating have their own importance in meeting with your drilling requirements. But, you should also choose the right size and shape of bit for the same. If you want to bore a pilot hole, then you should choose the smallest size of bit and for a large hole, you should have a large size of bit. So, whatever is your requirement, keeping the above fundamentals of drill bits in mind, you can purchase the right bit either from tool shop or from an online store.

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