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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

Structure

The volume ratio of abrasive grains to the total volume of a grinding wheel is called the "percentage of grain." The density of the structure depends upon this percentage.

Structures 0 to 4 are referred to as dense, 5 to 9 are referred to as medium, and 10 to 14 are referred to as coarse.

	Dense					Medium					Coarse
Structure	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14
Percentage of grain(%)	62	60	58	56	54	52	50	48	46	44	42	40	38	36	34