Vaccuum Turbine Tool for CNC w/adjustable speed

This is a modification of RichMac's Turbine rotary Tool. I needed a tool for milling molds out of refractory sand, while also reducing dust and keeping Particulate out of the air. The Bearings and Shaft were sourced from Mcmaster-Carr and the chuck was sourced from amazon. Links contained below. A metal Lathe was used to drill a small hole in the end of the axle rod, and turn town the hex on the chuck into a smaller diameter shaft that was pressed into the axle. I'm sure a more clever solution e