The 26,000 RPM spindle in my Othermill Pro can make a lot of noise when a tool is cutting. Even with the 1/8" diameter tools, milling a small metal part can still take awhile, so I began thinking about a way to dampen the sound of the machine. Enter the CNC Mill Enclosure, which was milled out of a 4x8 sheet of plywood on a ShopBot CNC router. It includes an isolated cabinet for the mill, areas for stock bins, and some generic storage.