... ,35m/s 2.first grade cornudum WAGC/PA/A ceramic grinding wheel/vitrified grinding wheel,1.Its hardness is higher than that of ... heat is created in use.3.It is used for grinding harder material and metals sensitive to heat such as chilled ... steel ,alloy steel.4.It is suitable for the grinding and forming grinding of instruments,cutting tools,moulding,gears,theads,thin-wall ...