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Bonded Abrasives

How to Fully Harness a Grinding Disc

Simple alterations can change the results dramatically. Here are a few aspects that can greatly affect the efficiency of a grinding disc, regardless of what type of material is being sanded.


The maximum operational speed on a grinding disc must not be exceeded. Slower speeds can be equally damaging. KLINGSPOR grinding discs are developed so that the maximum operational speed achieves the greatest efficiency. This means that this rated speed gives the most amount of stock removal compared with the amount of wheel wear. A lower selected speed has a considerable effect on the working manner of the discs because they tend to "jump" or "bounce". This can cause the discs to become uneven in wear and abrasive grit is torn out of the bonding.


In order to maintain a high speed during an operation, it is necessary to have plenty of power. In less expensive grinders, motors are designed below proper strength. This usually causes the wheel to slow down when pressure is applied to the work piece. Placing the blame on the grinding disc is a common error. Sometimes, a disc with a softer bond will solve the problem because the cut rate will be much faster; however, the grinding disc will have a shorter life.


A grinding disc should be applied to the work piece at a 35 degree angle. Extended trials have shown that a 35 degree angle provides the most efficient disc wear and amount of stock removal. It is not recommended to use a lower angle at all. By lowering the angle of application, a thin and tapered edge is created at the edge of the disc. If the grinding angle is then slightly altered, the thin edge can no longer withstand the grinding pressure and breaks.

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