Small sample efficiency. Small hammer mill design allows samples sizes down to 5 grams with minimal losses to reduce the R&D cost per trial. Scalability. Powder grinder lab results are directly scalable to larger FitzMill comminutors and Quadro Comil's, within the respective technology (i.e. hammer milling vs. conical screen milling). Repeatability.
The number of hammers used for a hammer mill of 1,800 rpm, should be 1 for every 2.5 to 3.5 horsepower, and for 3,600 rpm, one for every 1 to 2 horsepower. Hammers should be balanced and arranged on the rods so that they do not trail one another.