Abrasive Wheels Regulations – Everything You Need to ...

A wide range of tools utilise so-called abrasive products to perform cutting, grinding and sanding operations. A very common format is a rotating abrasive wheel, which can be used on both handheld and bench-mounted tools.

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Although a common piece of equipment across the UK, abrasive wheels can pose significant health hazards and are a leading cause of injury in the workplace.

Due to the risk, there are various abrasive wheels regulations that place legal duties on employers. A failure to comply can result in significant fines for breaches in the law.

Any employer that requires their employees to make use of abrasive wheels should be aware of the relevant legislation and regulations. This article discusses the design characteristics of abrasive wheels and looks at the current abrasive wheels regulations in the UK. We also discuss the importance of abrasive wheels training and show you where you can find accredited online courses for your staff.

Preparation and sizing

All abrasives, with the exception of the naturally appearing fine powders such as talc, must be crushed to the particle size required for use. Sizes in use vary from 4 grit, which measures about 6 millimetres (1/4 inch) in diameter, to as fine as 900 grit, which measures about six microns (0. inch) or about one-tenth the thickness of a human hair. In some cases, even finer powders are required when used for the polishing of scratch-free surfaces on high-quality optical lenses and mirrors for high-power telescopes.

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For the coarser sizes the crushed grain is measured by a series of test screens as established in most countries by government standards. For sizes 240 grit and smaller, the size of the grains is usually measured by a settling rate or sedimentation test.

Crushing methods have a significant effect on the cutting action and the strength of abrasive grains. Heavy crushing pressures, for example, tend to create splintery, sharp, and weak grains. These penetrate easily and remove material at a fast rate, and their cutting edges break down easily for resharpening. This shape is required in many coated abrasive products.

When a grinding wheel or coated abrasive belt is to be used to grind away large amounts of material under heavy pressures, a more regularly shaped, strong abrasive grain stands up longer. The sharp edge is not as necessary because heavy pressures are used that effect the penetration of the abrasive into the material being ground.

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