The FRIESS magnetic filters are equipped with 1, 3 or 6 concentrically arranged magnetic filter bars. Due to the use of highly efficient neodymium magnets with extremely high field strength, the particles contained in the liquid are drawn onto the magnetic filter rods and held in place. The specially designed flow makes sure that the liquid flows slowly and evenly along the magnetic rod(s). Due to this, even very small particles down to 1 µm and less will be attracted by the magnetic field and will stick to the surface of the magnetic rod. Even if the magnetic filter rod is completely covered with dirt particles, the full flow is maintained.

As no consumables are used and no additional energy is required to operate the magnetic filter, there are no operating costs. The magnetic filter is cleaned by simply stripping off the collected dirt. The removed dirt particles can be recycled without filter aids.

The magnetic filter FMF is available in five sizes:


  • Particle separation down to less than 1 µm
  • No filter aids required
  • No additional energy required
  • Dirt particles can be quickly and easily recycled according to type
  • Longer service life for cooling lubricant, washing water, grinding oils etc.
  • Improved surface quality for grinding processes


  • Filtration of cooling lubricants
  • Grinding
  • Honing
  • Lapping
  • Spark Erosion
  • Water jet cutting
  • Wash water
  • Parts washing machines
  • Hydraulic Systems
  • Test benches
  • Gearboxes