grinders that grind to a powder

how to grind down gun/black powder? | Yahoo Answers Jan 16, 2010· There are different types of powder, flake, ball, extruded, etc and of course black powder and each has a different rate of burn. Grinding black powder will get you killed, grinding modern powder down so that you cannot tell what type it is, is asking for trouble. HowbTo Grind Coffee? What's The Perfect Grind? Burr grinders are the answer to a more perfect union of bean and grind. Disk (a.k.a. plate) and conical burr grinders are your basic choices. Flat disk grinders use two spinning disks to smash the coffee into precise uniform grinds. Grinding and Polishing Powders, Powdered Abrasives NEW Boron Carbide Grinding Powders In terms of hardness, Boron carbide (B 4 C) with a Mohs hardness of 9.5 is third only to diamond and so makes an excellent lower cost alternative to diamond for the precision grinding, lapping and polishing of most hard materials.    Read More