Friability is the ability of individual abrasive grains to fracture during grinding to create new ,sharp cutting edges.The manufactured used in grinding wheels are aluminum oxide, cubic boron nitrite and diamond.
There is a condition which must be good for long lasting grinding machine, buy the abrasives according to machine, if machine heavy then grade abrasive is softer while light machine use hard grade abrasive.
There are also two type of abrasive grain such as - natural and manufactured.Its type abrasives are good for grinding tensile materials like steel and ferric cast irons.Alumina preferred on harder and having large arcs of contact.
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