Coated EDM wire

Master EDM Zinc-coated wire 0.10mm, 0.15mm, 0.20mm, 0.25mm, 0.30mm EDM wire for sale


Spec: Standard model

Core Material: Brass

Type of coating: Zn coating

Applicable Machines: Standard edm wire for most machine

(For more information please browse our details below)


Zn-coated EDM wire is an EDM wire that is coated with a layer of zinc to provide additional protection against corrosion and wear during the EDM process. The coating helps to extend the life of the wire and improve its performance, making it an ideal choice for cutting and shaping hard materials in precision machining applications.

Coated EDM wire

Technical Information

Zn-coated EDM wire is a type of wire used in electrical discharge machining processes that has a layer of zinc coating on the brass wire. Here are some technical information ensure that you purchase the appropriate EDM Zn-coated wire for your specific application from our factory.

  • Material: Made of a brass alloy consisting of copper and zinc, with a layer of zinc coating.
  • Diameter: Depends on the specific application in your project. Wire’s diameter range from 0.1 mm to 0.3 mm we can offer.
  • Tensile strength: The tensile strength of Zn-coated EDM wire is typically around 900-1000 N/mm², our Zn-coated EDM wire tensile strength is 980N/mm², suitable most needs .
  • Electrical conductivity: Zn-coated EDM wire has improved electrical conductivity due to the zinc coating, making it more efficient and precise in the machining process. And EDM wire we provide has pass the inspection and conductivity is 19%IACS.

Master EDM Zn-coated EDM wire is a typical EDM wire that is with coating and usable in most EDM machine.
Technical informations sheet of our product are as follows:

Core Material CuZn37
Coating Zn-coating
Conductivity 19%IACS
Tensile Strength 980N/m²
Threading Auto Threading

Size & Spec

The wire is available in various diameters we can offer, ranging from 0.1mm to 0.3mm, with a tolerance of +/- 0.001mm. The wire is also available in spools of different lengths, typically ranging from 3 kg to 25 kg.

φ[mm] 0.10 0.15 0.20 0.25 0.30

The type with “•”in column are commonly used models, if you need other models, please contact us for custom.

Spool Size

Spool Type Material d1[mm] d2[mm] d3 [mm] L1[mm] L2[mm] Wire Weight
Weight Tolerance
P3 ABS(PS) 130 80 20 110 90 3 0.05
P5 ABS(PS) 160 90 20 114 90 5 0.05
P10 ABS(PS) 200 110 25 135 110 10 0.05
P15 ABS(PS) 250 120 34 140 110 20 0.05
DIN125 ABS(PS) 125 80 20 125 100 3.5 0.05
DIN160 ABS(PS) 160 100 23 160 128 8 0.05
DIN200 ABS(PS) 200 125 22 200 160 16 0.05
DIN250 ABS(PS) 250 160 23 200 160 25 0.05

Couldn’t find the spec you need in this spool spec sheet? Please contact us for a special custom EDM wire solution.

Advantage of brass EDM wire

Our Quality Assurance

The testing process begins with the raw materials, which are meticulously inspected to ensure they meet our stringent quality standards. Once these materials are processed into our Brass, Galvanized, and Gamma EDM wires, they undergo a series of rigorous tests.

Coating Uniformity Test

For our coated wires, we use a Coating Thickness Gauge to check the uniformity and thickness of the coating, further ensuring the wire’s performance and longevity.

Surface Roughness Test

Using a Surface Roughness Tester, we examine the minute irregularities in the wire surface. This ensures the wire’s surface quality, which can significantly impact the accuracy of EDM processes.

Tensile Strength Test

Using a Tensile Testing Machine, we ensure our wires can withstand the rigorous demands of EDM processes, confirming their structural integrity under tension.

Diameter Consistency Test

A Micrometer or Laser Micrometer measures the diameter of our wires along their entire length. This guarantees that our wires deliver consistent performance in your manufacturing processes.

Straightness Test

To ensure the straightness of our wires, we use an Optical Straightness Checker or Straightness Measuring Device. These tools allow us to guarantee the precision required for accurate and clean cuts.

Composition Test

We utilize advanced equipment like XRF Spectrometers and EDS systems to verify the elemental composition of our wires. This ensures they meet exact material specifications for optimal performance in various EDM processes.

Spooling Test

Proper spooling of our wires is crucial to avoid wire breakage and machine downtime. We ensure this through visual inspection and, in advanced setups, automated systems with cameras and image processing software to identify any spooling issues.

Powder Drop Test

To ensure the stability and integrity of our wire’s coating during EDM processes, we conduct a Powder Drop or Dusting Test. This test measures the amount of residue or dust produced during operation, which if excessive, could affect the EDM process’s effectiveness and cleanliness.

Conductivity Test

The electrical conductivity of our wires is verified using a Conductivity Meter or a Four-Point-Probe Meter, ensuring they meet the highest standards required for EDM processes.

Industry Application