Types of wires for EDM machine
There are two main types of wire used for the main wire for EDM machine, brass wire and coated wire.
(1) General-purpose brass wire
Brass is an alloy of copper and zinc and has excellent discharge characteristics.
These discharge characteristics improve as the zinc content of the brass increases. However, it becomes difficult to form high zinc-content brass into a thin wire, because the malleability of the brass is reduced.
Brass with 35% to 40% zinc content is widely used, considering the balance between product performance and machining characteristics.
OKI product line-up
|Model No.||Wire diameter||Quality||Paraffin||Alloy No.||Tensile strength||Elongation|
|OB-P||0.1 to 0.3mm||Hard material||Yes||JIS H 3260 C2700W||> 980 N/mm2||< 3 %|
|OB-PZ||0.1 to 0.3mm||JIS H 3260 C2800W||> 980 N/mm2||< 3 %|
|OB-PN||0.07 to 0.3mm||No||JIS H 3260 C2700W||> 980 N/mm2||< 3 %|
|OB-PZN||0.1 to 0.3mm||JIS H 3260 C2800W||> 980 N/mm2||< 3 %|
|OB-B||0.1 to 0.3mm||Soft material||Yes||JIS H 3260 C2700W||> 442 N/mm2||< 20 %|
(2) Coated wire
A number of the characteristics of the single-layer structure have limitations. The coated wire has functionality that overcomes these limitations.
Currently, the main types of coated wire on the market are zinc-coated wire and diffusion-annealed wire.
OKI product line-up
|Model No.||Wire diameter||Type||Paraffin||Tensile strength||Elongation|
|OS-Z||0.1 to 0.3mm||Zinc-coated||Yes||> 883 N/mm2||< 3 %|
|OS-UZ||0.2 to 0.3mm||Diffusion-annealed||Yes||> 900 N/mm2||< 3 %|
OKI’s commitment to wire for EDM machine
Since OKI began selling wire for EDM machine in 1976, the product has been well received by the market. OKI’s customers can be found across Asia, North America, and Europe, as well as in Japan. For the future, OKI will continue to broaden the manufacturing know-how it has cultivated for over 30 years, so that OKI’s products become a favorite the world over. Moreover, OKI will further improve wire products to meet their customers’ needs, and bring new products to the market.