Single Spindle DLG 615-1+1 is for micro-drilling and routing of printed circuit boards. Has separate drill and route spindles selected automatically. Is equipped with two different spindles; both work on PCB and are switched over automatically. Drill spindle is high-speed air-bearing type for drilling micro and medium hole sizes only. Other spindle is a ball-bearing drill and route spindle (10.000 to 60.000 rpm) for drilling large holes and routing. Various drilling spindles are available up to 300,000 rpm.

Lenz, http://lenz-gmbh.de/en/products/drilling-machines/single-spindle-dlg/spindelumschaltung.html