* Finding the right grind a material of a certain corresponding hardness:
** Aluminum oxide
** Silicon carbide
** Cubic boron nitride
** Diamond
* The '''grain size''' of the grinding substance ranges from 8Z, which denotes how tightly the abrasives are bound to the metal disc. An (A) bond is soft and a (Z) bond is very hard.
* The '''grain spacing''' also plays an important part, and a scale of 1 (most dense) to 16 (least dense) explains the structure of the abrasive material.
* The substance that comprises the '''wheel bond''' is also a factor to consider. Wheel bonds come in the following forms:
** Vitrified
** Resinoid
** Silicate
** Shellac
** Rubber
** Oxychloride
