First：Cooling effect. The cutting fluid can absorb and take away a lot of heat generated during the cutting process, reduce the temperature of the cutting area, prevent the workpiece and the tool from overheating

reduce thermal deformation and tool wear, and improve the processing quality and tool life.

Lubrication action. Cutting fluid can form a layer of lubricating film during cutting, reduce cutting force and friction, reduce workpiece and tool wear, and improve cutting efficiency and machining surface quality.

Second：The cleaning effect. The cutting fluid can flush the cutting area, remove chips, metal particles and contaminants, etc., keep the workpiece surface clean, and prevent debris accumulation and adhesion during  the cutting process.

Third：Anti-rust action. The anti-rust agent in the cutting fluid can protect the surface of the workpiece from oxidation and corrosion, and prevent the workpiece from rust and damage during processing.