What type of oil is used as a dielectric fluid in EDM machines?

In the context of electrical discharge machining (EDM), the dielectric fluid plays a crucial role in the machining process, primarily serving to facilitate the erosion of the workpiece material by creating an electrical discharge. Kerosene is commonly used as a dielectric fluid due to its favorable properties, including a low viscosity which helps maintain a stable arc and remove debris from the machining area effectively. Its ability to withstand high temperatures without breaking down is also advantageous for EDM operations.

While other options may have some application in different scenarios, kerosene's specific characteristics make it particularly effective as a dielectric fluid in EDM machines, ensuring efficient machining and optimal performance.