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June 23, 2008

Use of Industrial Abrasives

by Marcus Ronan

Most industrial abrasives used today are made from hard minerals and will used in order to shape or finish off a piece of work by rubbing. When the abrasive is rubbed against the item it causes part of its surface to wear away and this will then result in a reflective smooth appearance to it. However, there are some industrial abrasives around which can result in a much more roughened surface to the item being worked on instead providing it with a matte, beaded or satin finish.

Today abrasives are used in a number of different industries and the actual physical and chemical composition of them will vary from one industry to the next. But although most abrasives will be used as a way of polishing the surface of a particular object they are also used to buff, grind, hone, drill, sharpen, sand or cut into them as well.

As we mentioned before the majority of industrial abrasives being used today are made from hard minerals and has achieved a Mohs rating of seven or more. But as well as abrasives being made from minerals there are some which are made from synthetic stones as well.

The majority of synthetic stones used in abrasive materials have a similar chemical and physical composition to those of the minerals. However, the major difference between these two types of materials used in abrasive products is that minerals occur naturally.

There are numerous types of minerals and synthetic stones being used to make abrasive materials and the most commonly used of all is diamonds. These are not only some that is formed naturally but can also be synthetically produced as well. Those that are made naturally and which are then mined for are often constructed from corundum. Whilst those that have been synthetically produced will be constructed from bauxite.

The diamond is one of the hardest substances known to man and yet there are plenty of minerals which are far softer than this and which can also are used for abrasive materials. One of the softest minerals being used today is calcium carbonate and this is frequently used as a polishing agent in toothpastes. It is this mineral in the toothpaste which will actually help to improve the whiteness of a person’s teeth overtime.

But just how effective the industrial abrasive is, is dependent on a number of different factors. One of these is the actual sizes of each grain or grit that makes up the abrasive material. The sizes from ones that are only 40 micrometers in size to those which are 2mm in size and these are the largest. But in order to get the right size pieces of grit for use in abrasive materials the mineral or synthetic stone needs to be crushed first. As it is crushed each piece of grit has rough edges to them that will end in points. This actually reduces the amount of surface which the abrasive comes into contact with but it does allow the user to localize the amount of pressure that they place on an item they are using the abrasive on.

As the industrial abrasives are used the grains which make it up will cause parts of the items surface to break away and leave the desired finish. But also at the same time the abrasive material begins to lose some of its grains as well and eventually overtime these will then need to be replaced to ensure that the right finish is provided every time.

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