This study focused on numerical analysis of the parameters influencing the oil mist flow
(MQL) outside a rotating tool, in non-contact configuration. This approach was a mandatory
step for the parameter optimizations before taking into account the material removing. The
optimization of inner canalization geometries to a milling tool was performed to transfer
the oil mist. The Reynolds Average Navier Stokes (RANS) and Lagrangian equations were used
to simulate the oil mist flow inside the canalizations by integrating the standard
k-ε turbulence model with the STAR CCM+ commercial software. The dynamic numerical
calculation was used to optimize the inner canalizations of a milling tool. Because of the
particular external tool shape, the micro spray cooling is not guaranteed to reach the
cutting edge. The external tool geometry, the inlet pressure, the shape and the
orientation of the inner canalization geometries in the tool body and the rotation speed
have significant influence on the lubrication efficiency. The main goal of this study was
to improve this efficiency as function of these parameters. Thus, parameter sets giving
good lubrication were determinate for a type of tool.