Dielectric fluid can influence all kinds of burning characteristics that have a direct effect on the successful outcome of an end users application.
1). Using oil that is a mineral based has a shelf life depending on usage for a period of two years. With mineral based oils each spark causes break down of dielectric strength. Cutting speed can be increased because of this breakdown but finishing speed will be greatly reduced. Pitting or Arcing can also occur causing the possible destruction of your work piece. When observing this situation it will become necessary to completely change your oil
2). Using a Synthetic based oil, the shelf life is indefinite and occurrences of work piece damage are the thing of the past. Synthetic oils are much more expensive but the cost of changing and EDMing issues allow for easy justification
3). Oil consistency or viscosity is often overlooked depending on the application. When EDMing small holes less than .020”, it is highly recommended to use oils with a lower viscosity to allow for better flushing through the tube. If you are EDMing small holes with great frequency you can see speed increases by as much as 40%.
Please consult with an SST Consumables representative for advice on the proper selection of dielectric fluids as this can be of great value to your overall sink EDM needs.
