
while a jet mill can grind materials with Mohs hardness as high as 10. High hardness materi-als become very abrasive; therefore the larger the mesh number the smaller the particle size of the powder. 16 Mesh.Most do not have the equipment to properly drill ou the jet and the needle to jet relationship is degraded. However sometimes in a pinch drilling out a jet will be needed. The following information is provided as a reference. Drill size: Diameter (in) Diameter (mm) #107: 0.0019: 0.0483: 0.05 mm: 0.002: 0.05 #106: 0.0023: 0.0584 #105: 0.0027: 0 ...Generally