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What Is a Core Drill?

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  • Written By: Alex Tree
  • Edited By: Melissa Wiley
  • Last Modified Date: 19 August 2014
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A core drill is a hollow, cylindrical drill used to make holes through a surface. It is made of metal, and its drilling tips are coated with diamond or carbide. The tool is composed of a motor, a handle or base, and drill bits. The hollow center of the drill is used to carve out and extract a sample from the drilled material.

The mechanism of a core drill is generally like that of other drills. The drill pushes through a surface with a twisting motion to make a hole. The main difference is that a core drill will extract a sample of the material bored through. This sample conforms to the shape of the hollow walls of the drill to create what is called a core sample.

There are many different surface types that a core drill can penetrate. It can make holes in hard surfaces like wood, rocks, and ice. The corresponding drill bit for each surface must be installed for good drilling performance.

The size, power, and features of this drill vary widely. The exact type depends on the kind of work it will be used for. There is a small and handy core drill for individuals. A powerful, medium-sized diamond drill is used for buildings and mines. Lastly, a particularly large, customized drill is used for massive construction projects and exploration.

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A core drill can be used for home projects by do-it-yourself enthusiasts. This drill is needed to bore through hard surfaces like concrete, brick, and porcelain tiles to make clean, deep holes that standard drills cannot do. Core drilling is commonly used to make holes for utility purposes, such as laying waste pipe and installing electrical wires. The hollow insides of the drill will scoop out and collect the debris made by drilling, which are then thrown away instead of being used as a core sample for analysis. A compact and lightweight model is readily available in many hardware stores.

Mining companies consider a core drill to be an essential piece of equipment because the drill is used to extract rock samples for prospecting. It is also useful to oil companies, as it can be used to test the layers and depth of a rock and oil source before they decide to start operations. Engineers use this type of drill to determine the composition and strength of the foundations of bridges and buildings.

A core drill is also used by the scientific community to get samples of surfaces in hostile environments like deep ocean rock and polar ice sheets. Scientists extract an intact sample like sediment or ice with this drill and examine it in a laboratory. The knowledge of geological features, climate changes, and plant history has been expanded owing to the use of core drilling.

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