Developed for grinding soft and medium-hardness products and for coating mineral filler surfaces. With pin and counter-pin discs, the resulting speed exceeds 200 m/s, allowing for the grinding of soft to medium-hardness minerals with high fineness ratios. Independent control of the speed and direction of rotation of the pin disc units provides great flexibility. An airflow through the mill assists in grinding, allowing control of product temperature and providing a means for pneumatic product transfer.

As standard, the mill body is a robust, welded steel construction. Where necessary, the SIERRA pin mill can also be offered in stainless steel construction. Maintenance access on SIERRA equipment is excellent, and pin replacement is an easy operation.