I constitute the principle to grind of the whetstone

I reduce work

　　　I sharpen it with an abrasive

I destroy work

　　　I destroy it with an abrasive

　　　I destroy it by work, the vibration of the blade

I crush work

　　　I transform plasticity

　　　I push it with an abrasive

　　　I push it with bond

I let work wear

　　　I let you wear with an abrasive

Composition changes work

　　　I change composition by frictional heat

　　　I change composition by a chemical reaction with the water

I maintain the function mentioned above

　　　I maintain quantity of abrasive tsukidashi

　　　　　　I sharpen bond with a chip

　　　　　　I reduce bond by friction

　　　Abrasive friableness

　　　　　　It crushes it by pressure to be applied to an abrasive

　　　　　　I raise friableness of abrasive itself

　　　Abrasive holdout

　　　　　　Adhesive strength of the bond

　　　　　　Contact area between an abrasive and the bond

　　　　　　Linear expansion rate difference absorption between an abrasive and the bond

　　　　　　Abrasive shape

　　　　　　An abrasive and chemical coherency of the bond interface

　　　　　　An abrasive and wedge structure of the bond interface

　　　　　　Interfacial surface-active power between an abrasive and the bond

　　　Abrasive dispersibility

　　　Composition stability of the bond

　　　　　　Chemical stability of the bond

　　　　　　Thermal stability of the bond