Although it can be ground with pure silicon carbide wheels, the grinding ratio
is very low and the material is easily damaged.
Although performance was outstanding, when compared with conventional aluminum oxide wheels with respect to grinding ratio and form holding capabilities, it needed its own bond formulations to be optimized for the "chip" producing process of steel grinding.
The grmndability of various materials can vary greatly from one material to the next and can be measured by means of the grinding ratio, "G" (volumetric ratio of material removed divided by the volume of grinding wheel consumed during the process).
In tests grinding Inconel 718, N-CBN wheels had a grinding ratio
of 4000 at removal rates up to 5000 [mm.
The grinding ratio
of a CBN wheel can often be as much as 200 times greater than that of an aluminum oxide wheel and, in many cases, after initial wheel preparation, may require no additional maintenance for the life of the wheel.
This grinding ratio
is a comparison point or a measure of efficiency.
has just introduced a new, blue, vitrified polycrystalline diamond grinding wheel, which it says, will reduce grinding times by 30 percent and improve grinding ratios
by 50 percent.
Both diamond and CBN abrasives provided grinding ratios
(G-ratios) well above those of the SiC abrasive: G for the SiC wheel was about 1, while G-ratios for the superabrasive wheels ranged from about 50 for Borazon 560 CBN to more than 150 for GE MBG-II, a medium-tough diamond material.