12 Jan 2026

Water-miscible Cutting Fluids are comprised of up to 95% water. Therefore, water quality has a direct impact on the efficiency and lifespan of the fluid, as well as the cutting tools themselves.

Major Issues from Improper Water Quality

• Hard Water: High mineral content (calcium, magnesium) causes unstable emulsions and can leave residue deposits. Furthermore, these minerals promote bacterial growth.

• High Contaminants: Excessive chloride levels can accelerate corrosion on both machinery and workpieces.

Key Control and Maintenance Regular monitoring and maintenance of coolant is essential to extend its lifespan:

1. Concentration Measurement: Should be measured with a Refractometer at least 1-2 times per week.

   • Low Concentration: Leads to corrosion, poor lubrication, and bacterial growth.

   • High Concentration: May cause sticky residues and increased foaming.

2. pH Measurement: Should be checked weekly. Generally, the value should be 9.0 - 9.6. A drop in pH indicates bacterial issues or low concentration.

3. Tramp Oil Management: Contaminant oil floats on top, reducing oxygen in the system, which promotes foul-smelling bacteria. You should use a Skimmer or Oil Separator to remove it regularly.

Efficiency Enhancement Tips

• Use Pure Water: It is recommended to use DI Water (Deionized) or RO Water for mixing and top-ups to prevent mineral buildup.

• Correct Mixing Method: Always add the coolant concentrate slowly into the water (O.I.W. - Oil Into Water). Never pour water into the concentrate.

At Focus Mechanic, we distribute Best-1 tramp oil skimmers and coolant maintenance equipment. We also offer comprehensive coolant condition testing services to help you eliminate worries in your factory.

 Read more about our products and services at: https://www.focusmechanic.co.th/TH/home.html

#Coolant #CuttingFluid #FactoryMaintenance #Metalworking

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