What is a Micro-Emulsion Coolant?

Micro-Emulsion Coolants

Micro-Emulsion CoolantsWhat is a Micro-Emulsion?

Micro-emulsions are clear, thermodynamically stable, isotropic mixtures of oil, water and surfacant (which lowers the surface tension between two liquids or a liquid and a solid). Most of the particles in the micro-emulsion are between 10 and 50 nanometers in diameter.

The term was coined in 1943 by two Cambridge University chemistry professors. The microemulsion systems are also called solubilized oil, transparent emulsions or micellar solutions.

Micro-emulsions are usually the result of:

  • Oil dispursed in water (globular)
  • Water dispursed in oil (globular)
  • Biocontinuous (interconnected)

These Micro-emulsion mixtures may also contain cosurfactants (which make surfacants more effective). Cosurfactants increase the oil solubility of microemulsions. Cosurfactants can also change the temperature range or the salinity range of microemulsion formations, to improve their use in certain applications.

Micro-emulsion Coolants

Micro-emulsions can provide the best of both worlds (synthetic coolant and soluble oil) as a coolant. They provide all the cooling properties of a synthetic plus the lubrication properties of a soluble oil. This makes them the best choice for medium to heavy duty machining operations on stainless steel.

Benefits of Micro-emulsion Coolants

In particular, micro-emulsion coolants provide:

  • Excellent cooling at the tool-workpiece interface
  • Can be used for multi-metal operations including carbon steels, yellow metal, aluminum and stainless steel
  • Can be formulated with Extreme Pressure lubrication additives
  • Superior hard water stability
  • Improved bio-resistance
  • Improved metal removal properties and chip carry out
  • Excellent tramp oil rejection
  • Able to be formulated for light, medium or heavy duty operations
  • Easier to remove soils from work piece after operation
  • Lower surface tension allows for better wetting and even films during machining

Our Micro-emulsion Coolant Products

Harry Miller Corp offers micro-emulsion coolants in the Kleerkut products series. Kleerkut 2900, Kleerkut 4960, most of the Kleerkut 4900* series, and the Kleerkut 5900 series are all micro-emulsion coolants.

If you would like to learn more about the micro-emulsion coolants and other products we offer, contact us today.

(*the exceptions being Kleerkut 4900-TLF and Kleerkut 4900–LFS)

Kleerkut® 4900-EPL – Heavy Duty Semi-Synthetic Coolant

Kleerkut® 4900-EPL is a high oil semi-synthetic with chlorinated extreme pressure additives for machining the toughest alloys.

Kleerkut® 4900-HD – Heavy Duty Semi-Synthetic Coolant

Kleerkut® 4900-HD has an enhanced, upweighted synthetic lubricant package, compared to Kleerkut 4900, for heavier duty applications. This product is chlorine-free.

Kleerkut® 4900-HP – Medium Duty Coolant

Kleerkut® 4900-HP is a lower oil version of 4900 designed for light-to-medium duty applications. This product has more reserve alkalinity to enhance pH stability and provide superior emulsion stability.

Kleerkut® 4960 – Semi-Synthetic Coolant for Aluminum

Kleerkut® 4960 performs a wide variety of machining and grinding operations on both ferrous and non-ferrous metals and offers significantly upgraded lubrication properties for aluminum machining operations, as well as better heavy duty lubrication on steel.

Kleerkut® 4960 is a bio-resistant semi-synthetic coolant, free of substances subject to the reporting requirements of SARA Title III. It provides superior rust protection when used in sumps which typically encounter large amounts of contaminants, and is ideal for use in central systems. It is low foaming, easy to clean using filtration or centrifuge, and long lasting.

Kleerkut® 2900 – Low Oil Semi-Synthetic Coolant

Kleerkut® 2900 is a lower oil, heavy duty semi-synthetic lubricant containing extreme pressure additives. It is free of substances subject to reporting requirements of SARA Title III, Section 313. This product provides improved lubricity and excellent micro-finishes. It is low foaming, rejects tramp oils and is suitable for high pressure recirculation.

Kleerkut® 4900 – High-Oil Semi-Synthetic Coolant

Kleerkut® 4900 is a high oil semi-synthetic that performs a wide variety of machining and grinding applications on both ferrous and non-ferrous materials.  It provides excellent finishes, is extremely bio-resistant, splits out tramp oils and has superior rust protection.

Kleerkut® 1900-FR – Light Duty Coolant

Kleerkut® 1900-FR is a light duty semi-synthetic coolant for machining & grinding operations on steel, cast iron, and aluminum.