Deburring and polishing

Perfect results with abrasive flow machining

Abrasive flow machining (AFM) is often the only machining method for precision deburring of complex workpieces.

That applies especially to internal surfaces, bores, openings and complex part geometries with hard-to-reach locations. Conventional mechanical, thermal or electrochemical polishing and deburring methods often prove unreliable or inefficient in such cases.

Abrasive flow machining is also recommended for particularly sensitive or highly demanding production parts that require absolutely perfect and reliable surface finishes, such as medical implants or high-performance functional parts in medical, aerospace or sensor technology. To meet hygienic design requirements and enable applications in the chemicals, pharmaceutical and food sectors, connections, distributors, pipes, lines and valves with welded seams have to be internally polished to a surface quality higher than RA<0.38 micrometers.

Abrasive flow machining involves pressing a viscous paste containing abrasive particles through the workpiece or over the surface to be machined under pressure. The device for holding the workpieces is custom-made and the composition and viscosity of the abrasive paste is adapted to each machining task.

The benefits of abrasive flow machining compared to other methods

  • Machining of workpieces with hard-to-reach locations
  • Surface machining with microscopically exact precision
  • Dimensionally stable machining with no material removal
  • Polish, chamfer, deburr or combine the processes with custom abrasive mixes
  • The best results thanks to custom abrasive mixes
  • Also suitable for small series production and 3D printing with quantities starting from a single unit
  • Economically attractive option for reproductions
  • Delicate areas (such as threads, sealing surfaces, etc.) can be excluded from machining
  • The knowledge from over 20 years of experience and expert advice included.

Before and after example

Werktstück vor dem Entgraten mit Strömungsschleifen Werktstück nach dem Entgraten mit Strömungsschleifen

Learn more in our video

Want to see more? You can see all the machining steps in detail in our video gallery.

Alternatively, you can take a look at some of our before and after examples.