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essential facts you have to know about cutting discs

What are cutting discs?

Cuttings disc are expendable tools used on angle grinders or stationary devices for cutting a variety of materials – from metal alloys (steel, stainless steel, aluminum), to wood, stone, concrete and other materials. They are round, thin and flat panels, like CD or DVD. They are basically divided into classical low price disc for metal using a synthetic resin as a binder and diamond discs.

They were invented because sometimes it was impossible to cut particular material or the procedure was too demanding regarding time or costs. Cutting discs on angle grinders allowed great mobility, ease of use and availability.

How are the cutting discs used?
China cutting disc for metal are used by being installed on the angle grinder or a stationary device and then cutting required material like steel pipes, stainless steel rods, aluminum profiles, etc.
Unlike cutting with knife or scissors, in which case the cut parts connected together again obtain full length, cutting with cutting disc causes a reduction in the total length of the product. This happens because the cutting with discs actually removes material from a particular point to make a hole that will separate the product in pieces of desired length. If we take a thin hand sander and abrade the same place numerous time, we would get the same result. It means that cutting process is actualy extremely fast honing of material (several thousand revolutions per minute) on a very small area (0.8 to 3 mm).
It is important to note that this method of cutting creates a lot of friction that develops high temperature at the point of cutting and can lead to undesirable changes in structure and colors. In order to prevent this, it is advisable to use the disc as thin as possible, and cut carefully so the product wouldn’t get warmed up.

Classic cutting discs with synthetic resin
In metal industry, resin EN12413 cutting discs which are mostly used are the classic ones with synthetic resin as a binder. They are divided according to their purpose, so we distinguish between discs for cutting steel, stainless steel, aluminum, and stone.

They consist mainly of the following components:
steel ring – which enables firm and safe installing to the machine
label – contains all the important information related to the cutting disc
safety net – fiberglass net which prevents cracking of disc
cutting mixture – a mixture of corundum, binder and other materials
safety net – two safety nets is the standard for safety today

A cutting mixture is mostly made of aluminum oxide Al2O3, silicon carbide (SiC), and other special minerals.

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