Many theories have surfaced on exactly who has machined the world's smallest hole. The topic has been debated around the globe. But Makino has done it in Japan on a communications /fiber optic part -a stunning 0.00044 inch finished hole diameter, and was cut on the Makino EDGE2 Sinker EDM machine...
Close tolerances are critical for generating moulds that produce optical-quality headlight and tailight lenses for autos.