Hitachi High Performance Brass EDM wire is made by Hitachi Metals in Japan. Hitachi is one of the best-known names in the EDM industry as a manufacturer of premium brass EDM wires. Hitachi's reputation is based on a level of consistency and quality in its product line and is unmatched by other brands in the industry. Both Fanuc and Makino recommend Hitachi as their brass wire of choice. Hitachi is also well suited to run on Agies and other name brand machines.
Only pristine, virgin raw materials are used in the manufacturing of Hitachi brass wire. It has virtually no paraffin which helps it to run very clean and without causing any brass build-up in the wire guide system. The use of natural diamond dies in the final drawing steps of the manufacturing process leads to a superior, extremely consistent and smooth wire surface.
Hitachi EDM wire is made with a CuZn40 (60% copper, 40% zinc) brass alloy which, due to its higher zinc content, allows for faster cutting speed than brass wires made with a CuZn37 or CuZn35 alloy.
Hitach Metals has a fully vertically integrated manufacturing line where casting, drawing, spooling and packaging of the product are all done internally; guaranteeing the highest quality control and consistency.

Hitachi HBZ wire is the hard and most commonly used version of Hitachi EDM wire. It is offered in .004"–.012" diameter on a wide variety of spools. The .004"–.008" diameter products have a tensile strength of 980 N/mm² while the .010" and .012" versions have a tensile strength of 932 N/mm² . These products are manufactured to be extremely straight and are very suitable for auto wire threading. The wire diameter tolerance is +/- .00004" and its minimal elongation is 0.4%. This wire is sometimes referred to as HBZ-K and also as HBZ-U.