An adequate comprehension of the thermomechanical fields at the tool-chip and tool-workpiece interfaces is required to better understand the effect of dry machining on the quality of the tool life. Several studies focused on the modelling of friction behaviour at the tool-chip interface, in terms of friction law and friction coefficient, but the influence of the material velocity profiles has not sufficiently been studied yet. In this work, a numerical model has been developed to reproduce temperature evolution in the tool during a milling operation of X100CrMoV5 steel. The model considers a three-dimensional tool subjected to different thermal loads that depend on various material velocity profiles found in the literature.