Applications of the Nikuni VDF vortex dynamic filter

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Nikuni VDF vortex dynamic filters remove both ferrous and non-ferrous particles from CNC coolant

Nikuni VDF vortex dynamic filters will remove up to 99% of non-ferrous particles down to 25 microns, and 90% of similar particles down to 5 microns in one pass from machine tool coolant. The Nikuni VDF does not contain any moving parts or an element.

Technology developed and applied...

The Nikuni VDF vortex dynamic filters are hydrocyclones specifically designed to enhance the performance of machine tool coolants.  This is achieved by removing a large percentage of any metallic particles present in the flow of coolant to the tool head.  

Nikuni VDF vortex dynamic filters are available in stainless steel and nylon. Flow rates available range from 20 lpm to 300 lpm

Typical VDF single pass removal performance on aluminium is:

  • 99% of all metallic particles down to 25µm
  • 98% of all metallic particles down to 15µm
  • 95% of all metallic particles down to 10µm
  • 90% of all metallic particles down to 5µm 
  • 65% of all metallic particles down to 3µm  

Benefits of fitting a VDF hydrocyclone are:

  • Cleaner coolant and a longer life-cycle
  • Reduced tool wear
  • Superior surface finish
  • Shorter cycle times
  • No filter elements to block
  • No filter elements to change
  • More machine tool up-time and less downtime
VDF Range:
Nominal flow capacity;  body material: SCS13
  • 20 lpm
  • 30 lpm
  • 50 lpm
  • 70 lpm
  • 100 lpm
  • 200 lpm
  • 300 lpm
  • 1,000 lpm (under development)
Body material: resin (nylon PA6)
  • 30 lpm
  • 65 lpm
  • 100lpm

Coolant contamination (metallic particles) can be returned to a separate contaminated fluid tank or consolidated in purpose designed sludge pod and dumped at regular intervals.  Fully automated air operated sludge pod dump valves are available.

The Nikuni VDF is ideal for building into machine tools and many other items as part of original equipment using water or oil, ensuring that systems can be cleaned by this media-free technology.

See A&M/Nikuni C-CAT application pages for further details and an example of a simple standalone arrangement of the Nikuni VDF hydrocyclones.