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Grinding wheel Structure of grinding wheel Abrasive grain (artificial abrasice) Grain size Grade Structure Bond Bond subdivision symbols Grinding wheel specification and indication method Grinding wheel's shapes and size Process of grinding wheel Grinding operations and how to select grinding wheel Basic conditions for selection Prerequisite for selection standart by JIS. Standard selection of grinding wheel by JIS. Processing conditions Management of grinding operation problem Grinding wheel safety Treatment and storage Installation Points of caution when using Safety level Protective equipment CBN and Diamond wheels Bond characteristics Application examples by bond Concentration Indication Wheel shape symbols Truing and dressing Basic conditions on wheel selection

Grade

A "grade" does not refer to the hardness of abrasive grain or bond itself. It indicated the binding degree of weakness or strength (also known as "hardness") of the bond, which sustains abrasive grains.

Binding degree increases in alphabetical order according to the given grade. A grade is a depth expressed alphabetically, when applyinga fixed load and rotation to a carbide bit of uniform shape on the flat surface of the grinding wheel.

It is most important in selecting a grinding wheel to adjust the grade by taking into consideration the hardness of the workpiece to be ground, peripheral wheel speed and other operating conditions.

 

Grade Table Super soft A,B,C,D,E,F,G Soft H,I,J,K Medium L,M,N,O Hard P,Q,R,S Super hard T,U,V,W,X,Y,Z