CNC Floating Diamond Drag Tool
Bought the 120 degree diamond drag tip from Diamond Drag & Rotating Engravers by J & M Diamond Tool, Inc.
Just a 1/2" drill rod that was bored out and fitted with a smaller 1/4" drill rod. First test engraving was in a scrap piece of 1/8" plexiglass from home depot at 30ipm speed. Text was very sharp and well defined.