During grinding, a great amount of heat is generated that can cause damage to both the workpiece and the tool. For this reason, most grinding processes take place under flood lubrication with cooling lubricants to reduce friction and improve heat dissipation. However, in addition to the positive effects, an excess of lubricant also leads to reduced cutting engagement and thus reduced process effectiveness. Furthermore, grinding results can vary greatly depending on the cooling lubricant used. This variability makes it necessary to adjust the cooling individually for each application in order to achieve an optimum of quality, efficiency and effectiveness. Up to now, parameter studies based on the principle of "trial and error" have been necessary for this purpose, and their scope of validity is limited to a fixed set of workpiece and process parameters. For a more general and targeted optimization of the process, there is a lack of basic understanding of the exact systemic effects of cooling lubricants on the grinding process and the associated contact mechanical processes in the grinding gap.