In the realities of modern machine-building production, control and management of processes occurring in the cutting zone are of great importance. The acquisition of control will significantly improve the stability and quality of processing, and the possibility of monitoring will help to increase the economic efficiency of production. This article presents the potential of the thermo-emf signal in a natural thermocouple "tool -workpiece" which is considered to be an information signal from the

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... utting zone. It also shows experimental proof of the influence between honing width on the front surface of the tool and its size.