Engraving Machine 4th Axis Planetary Reducer Rotating Shaft A Axis CNC Dividing Head Milling Accessories CA2018
Add a Fourth Axis Rotary Table to your CNC Router - Techno CNC
How to Use a CNC Router with Rotary 4th Axis for Beginners? - YouTube
4th axis jig for CNC machine: fine-tune it once, then set it and forget it. Easily re-mount it square to your t-slot table so you don't have to re-tram/tune/shim it each time. :