Main Considerations

Physical Size: The first thing to consider is to buy the appropriate wheel for the size of the grinder. A smaller diameter wheel will work on a larger grinder but this will affect the peripheral speed so it’s not recommended, as it will run more slowly.

 

Material to be Ground: The material will be ground or sharpened directly influences the kind of abrasive required in the wheel. i.e. tungsten carbide tools will need a ‘green’ silicon carbide wheel.

 

The Grit Size: This is defined by the task that you are completing. If a high removal rate of material is required then you will want a coarse grit. 24g. Fine finishing needs a finer grit, such as 100g.

 

Glue / Bond: The bond is what holds the abrasive together in wheel and will once again be determined by the task undertaken. There are three main types of bonds:

1.Vitrified bonds– Made primarily of clay, vitrified bonds are strong and very rigid. This is the best type of bond when a high stock removal is required.

2.Organic bonds –Designed to operate at higher speeds, these bonds will soften under the heat of grinding. These are also good for high stock removal and jobs which require a better finish.

3.Rubber bonds –Offering a smooth grinding action, these wheels are specifically used when a very high quality finish is required.

 

Speed Rating

The wheel must beused on a grinder that does not work above it’s safe operating speed as thismay lead to breakage.

 

Wheel dressing