Stream Mining, Spatial.

The present invention relates to a tool cooling device for machine tools in which a plurality of cooling fluid distributing units are provided on a fixed shaft having a hole formed therethrough and communicating with a source of cooling fluid and each of the distributing units is connected preliminarily to one of the tools with oil holes which are accommodated in the tool magazine of a machine tool, whereby when selected one of the tools is engaged as such with the spindle, the cooling fluid is automatically supplied only to the tool engaged with the spindle.