Electrical Discharge Machining Oil (EDM) is a specialty oil used in the electrical discharge machining (EDM) process. It acts as an electrical insulator, flushing out metal chips generated during machining and effectively dissipating heat from the workpiece and tool, resulting in a more accurate and safer machining process.
Functions and Importance of EDM Oil:
• Electrical Insulator:
EDM oil has high electrical insulating properties, preventing unwanted electrical arcing and maintaining sparks at the precise cutting point.
• Cooling:
Absorbs heat generated by sparks, preventing damage to the tool and workpiece from excessive heat.
• Chip Flushing:
Its low viscosity helps displace small metal chips generated during machining, ensuring a clean surface and a continuous process.
• Wear Reduction:
It lubricates and reduces wear on the tools used during machining.
Characteristics of Good EDM Oil:
• High Purity:
Made from high-purity mineral oil.
• High Flash Point:
For safer operation, it reduces the risk of ignition.
• Low Aromatic Value:
Reduces user health risks and leaves no residue.
• Low Volatility:
To reduce oil loss and odor.
• Non-Reactive with Metals:
Does not corrode or react with alloys such as copper and aluminum.
