Makino builds on the existing capabilities and features of its proven EDAF-Series sinker EDM machines by adding a special fine-hole machining configuration that is used to produce high-accuracy EDM drilled holes using an oil-based dielectric system. The fine-hole machining configuration is a factory machine ordered option that incorporates a 1000 rpm rotating spindle, high-pressure flushing, and a programmable W-axis and guide arm assembly.

The versatility of the EDAF-Series fine-hole machine is unmatched, and provides both high-performance standard sinker EDM operation and high-precision EDM drilling on a single machine platform. The integrated guide arm assembly, which contains the adjustable die guide and middle guide mechanisms, can quickly be removed or installed from the machine with a special alignment coupler. The middle guide assembly dramatically improves the performance of machining small-diameter holes by supporting the electrode during operation to prevent whipping or bending.