Abrasive flow machining

The nature of AFM makes it ideal for interior surfaces, slots, holes, cavities, and other areas that may be difficult to reach with other polishing or grinding processes.

[3] Due to its low material removal rate, AFM is not typically used for large stock-removal operations,[3] although it can be.

Abrasive particles in the fluid contact raised features on the surface of the workpiece and remove them.

[1] The highest amount of material removal occurs in areas where the flow of the fluid is restricted; according to Bernoulli's Principle, the flow speed and pressure of the fluid decrease in these areas, facilitating a higher material removal rate (MRR).

[1][3] The pressure exerted by the fluid on all contacting surfaces also results in a very uniform finish.