The interplay between these forces produces the high and very effective degree of size reduction of the planetary ball mill.

A planetary ball mill consists of at least one grinding jar which is arranged eccentrically on a so-called sun wheel.

Aside from common ball mills there is a second type of ball mill called a planetary ball mill.

In attrition, macro- or micro-scale particles are ground in a ball mill, a planetary ball mill, or other size-reducing mechanism.