The process of grinding produces characteristic acoustic emissions (AE) and the signals of AE could be used as 'condition monitoring' tool to understand the phenomenon involved in material removal. It has been observed that high-speed grinding of the ceramics improved machining productivity without deteriorating the surface quality of the ceramics, which is not common in the case of metals. Critical grinding conditions limiting the formation of cracks on the ceramics were identified. The trend in AE_(rms) signals could be correlated to the grinding force and the grinding conditions. In the case of Ultraprecision machining, the ductile regime grinding of the ceramics was found out in terms of feed and depth of grinding with grinding velocity and the AE_(rms) could reveal the occurrence of ductile regime grinding.
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