ALC 500-1 Series is for drilling and routing printed circuit boards that contain aluminum. Is equipped with two spindles with different collet systems: One has a 1/8" shank collet for standard tools and is mainly used for drilling; the other has a collet for 6mm shank tools to provide more stability for the routing process. Routing spindle is equipped with a lubrication system inside of the pressure foot to cool and lubricate tools.

Lenz, http://lenz-gmbh.de/en/products/aluminiumroutingmachine/-series-alc/1.html