Recently, the study on grinding practice has become active year by year, and some excellent reports have been published.
But the studies on the wheels, particularlly on its grinding action and grinding ability are so rare that I studied the grinding mechanism of wheels, the grinding ability and the relation between the wheel constitute elements such as abrasive, grain size, grade (bonding strength), structure and bond through the cylindrical grinding experiment.
I obtained the conclusions from practical and theoretical study which were summarized as follows;
1) In the grinding mechanism there are four types, such as "torn off", . "normal", "loading", and "glazing".
The characteristics of these four types have a fundamcntal relation to the grinding action and ability of wheels.
2) Grinding force is decided by the sharpness of abrasive edges and the number participant of grinding.
3) Wheel wear is decided by the cutting force exerting on the wheel surface and the break strength(bonding strength, crush and abrasion strength of edges) of wheels.
4) Accuracy and surface roughness of finish are decided by the abrasive edge number participant of finishing.
5) Grinding temperature is nearly in proportion to the grinding force.
6) But the results 2)5) are established only in "normal" grinding type, and in other types the results become more complex.
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