What is the shank diameter of CNC bits? Jannie Zhang March 28, 2019 06:50 Updated 3.175 mm. Please refer to the specification page for more details about the Snapmaker CNC carving function: https://snapmaker.com/spec. Related articles What is the spindle speed of CNC motor? Is it adjustable? The Definitive Guide to Laser Engraving and Cutting with the Snapmaker What kind of materials does the CNC carving support? CNC Carving What should I do if the toolhead cannot move down? Comments 0 comments Please sign in to leave a comment.