The newly patented Trough Mill® manufactured by Progressive Industries, Inc. provides not only the typical “stirring” action produced by other media mills but also includes compression and contraction actions as well. These added actions help increase grinding and through-put tonnage,  which relates to a lower hp/ton cost. Available in multiple sizes, the Trough Mill® can be used in conjunction with a Micro-Sizer® Air Classification System for a closed loop system, or it can be used as a stand-a-lone mill. Progressive Industries, Inc. is available to help you with your fine/ultra fine product needs.