What are Grinding Wheels Used For
                     What are Grinding 
Wheels Used For
Grinding wheels are made up of abrasive grains and layers of 
fiberglass that are bonded together by another material to form 
a wheel shape. The abrasive grains serve as grinding tools, 
extracting material from a workpiece so that it can be formed 
and refined. Grinding wheels come in handy for a variety of 
grinding and machining tasks.
Characteristics of Grinding Wheels
There are five main characteristics 
of a grinding wheel- material 
hardness, grain size, wheel grade, 
grain spacing, and bond type.
• Material hardness
The abrasive material of a grinding wheel is based on the hardness 
of the cutting workpiece material. Super abrasives are special 
grinding wheels designed with diamond or CBN grains. 
• Grain size
The size of the abrasive grains in the wheel is determined by a 
scale of 10 to 600 (finest) coarsest. A larger grain can cut more 
freely, allowing for quicker cutting but with a poorer surface finish. 
• Wheel grade
The degree to which the bond retains the abrasive varies from soft 
to hard. Softer structures range from A to H, relatively hard 
structures range from I to P, and hard structures range from Q to Z.
• Grain spacing
The ratio of bond and abrasive to air space is known as density.
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