6. Causes and corrective actions

Depending on the procedures followed and the conditions of use, various issues may arise, including:

• fumes;

• foaming;

• an oil mist;

• skin irritation;

• corrosion of non-ferrous metals.

The performance of cutting tools, the quality of manufactured parts, productivity—in short, the technical and economic efficiency of machining operations—can be affected by issues related to the use of degraded oil.