Sherline 3050-DRO Sherline Vertical Milling Column (Inch) with DRO This Sherline attachment allows Sherline lathes to be quickly and easily converted into a small milling machine. The attachment consists of a steel dovetailed vertical column with a solid aluminum base that attaches to the bed of the lathe in place of the headstock. The headstock then mounts to a dovetailed saddle on the vertical column. The saddle is raised and lowered to control the depth of cut by turning a handwheel. Calibrations on the handwheel enable depth control to .001" (.01MM).Parts to be machined are mounted on the crosslide. On the deluxe version P/N 3480 (3485 Metric), a 2-1/2" adjustable "zero" handwheel replaces the standard handwheel.