Different Types of Drill Bits and Their Uses You Need to Know

Drills and drill machines are used to create round holes in a variety of applications.

A drill is the instrument used to bore a hole in a piece of wood or stone. What you see to move the drill is referred to as a “drill machine”. Drilling refers to the process of creating holes in solid objects using drills and drill machines.

Using a drill bit, you may create or expand holes in metal. These are used in conjunction with a drill press or manual drill that has a chuck.  An indispensable tool in every workshop, a drill comes in handy for a wide range of tasks. However, before you can use any drill, you must first choose what kind of drill you want to use. Drill bits come in a broad range of sizes and shapes. Learn about drill bits so that you can select the proper one to make your work simpler.

Various Applications of Drill Bits 

For drilling holes in various materials, the drill bits are made. Different kinds of wood, metal, plastic, porcelain and concrete are all used in this project.  Drill bits come in a variety of shapes and sizes depending on their diameter. Using step drill bits, you may create any surface (depending on the thickness of the material). Using a cobalt-type drill bit, you can also drill holes in high-tensile metals.

7 Different Types of Drill Bits and Their Functions

There are several drill bit varieties used in construction and do-it-yourself. Using the appropriate bit for the job may save considerable time and make a difficult task simple.

Installer Bits 

Drilling holes for the installation of wire for home theatres or security systems is a common task for technicians who utilise installer bits. There is a little hole at the tip of the bit that you may use to enter the wire you want to use to cut through the substance. Installer bits might be as long as 18 inches to make their task easier.

Auger Bits 

When drilling into heavy, dry wood, you’ll want to use one of these wood auger bits. When drilling into hard materials, you don’t have to exert a lot of force because of the clever design of the auger drill bit. stainless steel wood screws at the end of the earth auger drill bit make the first hole through which the remainder of the bit may be inserted. As a consequence, auger bits produce holes that are very clean and exact.

Flat Bits 

Low-cost, low-performance flat bits drill holes in wood that are just marginally smooth. The inexpensive cost of these bits makes them ideal for drilling huge holes, while other kinds of bits become prohibitively costly. To make flat bits, a variety of processes may be used, including cutting a piece of a bar to the desired length and heat-treating it. Drills are the simplest to build and the least expensive to acquire.

If you use flat bits, you are more likely to have entrance surfaces that are split, a hole with rough edges, and a mess at the exit. Drilling may be severely disrupted if the leading point breaks through, resulting in considerable vibration and even damage to the hole’s walls. Place waste wood beneath the workpiece to prevent some of these issues.


A screw head recess is created using a countersink. It is possible to have a countersink that looks like a star or a snail. It takes less time to replace the hexagonal shaft countersink than it does to change the round shank. Hex shanked countersinks are no weaker than round countersinks. An oversize twist drill can be used to countersink, although it’s unlikely to be an exact match for heavy-duty wood screws head profiles. 


It is necessary to use SDS machinery and bits for hard masonry (such as certain concrete and engineered bricks). However, unlike hammer drills, they are capable of producing far greater hammer force, and their bits have a specific shank that locks into an SDS (Small Diameter Chuck) on the drilling machine, rather than the twist-grip (Jacob’s chuck) that is often used on other types of drilling machines. Because an SDS bit is free to travel back and forth a few millimetres in its chuck and the drilling machine distributes its hammering energy directly to its back, this isn’t only a matter of convenience when it comes to changing bits:

Traditional hammer drills can’t compete with SDS machines and bits for performance, especially in tougher materials, and those who are new to SDS typically regret not having gone sooner. There are SDS bits that can be purchased in lengths of up to a metre and sizes of up to 3 centimetres.

Masonry Bits 

Tungsten Carbide is fused or brazed onto the tip of steel drills. Because of the broad tip, these masonry bits may be identified as “TCT” (Tungsten Carbide Tipped). Hammering the workpiece with a hammer destroys a little portion of the material, resulting in the tool’s cutting edge becoming somewhat blunted. The point wears out fast if the hammer motion is not utilised. Brick, block, stone, and mortar may be drilled using masonry tools. Masonry bits may be completely dull and yet perform well because of their crushing rather than cutting action.

In wood and metal (owing to the absence of a strong cutting edge), they are nearly wholly ineffectual. 

Tile and Glass Drill Bits

These are specialised drill bits that can drill through a variety of materials including plastic, tiles, glass, marble, and brick. Glass and tile drill bits are also capable of withstanding high temperatures.


Drill bits come in a variety of sizes and forms. It’s always advisable to go with a drill bit that’s perfect for the job at hand. Because they are available in a wide range of varieties, you can always find what you’re looking for.

James Harris

James Harris, the marketing manager of Multi-Fix Direct, is widely regarded as an expert in business and marketing. An experienced user experience professional and service thinker, he welcomes new challenges and opportunities that add value to the company's brand image. He often posts to the most prominent blogs, enabling him to share his decades of experience with a wider audience.

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