You can simulate 
  turning head tool holders, which enable you to perform turning and boring operations on a milling machine. 
For example, in the image below the piece is machined by the tool rotating around the stock. 
 
 
To modify a Machine Design file to support turning head tool holders: 
- In the 
	 Machine Design Settings dialog, ensure 
	 Enable Turn/Mill UI is selected, and select 
	 Support Specialized Turning Heads. 
  
 
- Create or import solids to represent the turning head tool holder and the plate that moves in the U axis that holds the turning tool. 
	 
 
	 
 
   
- Use the 
	 Parent/Child Relationships dialog to make the U plate solid a child of the turning head tool holder solid. 
  
 
- Use the 
	 Specify Movement dialog to enable the U plate solid to move in +delta X. 
  
 
- Create a UCS on the U plate solid to locate the tool. 
  
 
- Using the 
	 Tool Block dialog, make the turning head tool holder solid a tool block, and create a tool location on the tool block using the UCS you created on the U plate solid. 
  
 
- To use two tools that cut from opposite sides of the part, create a second UCS for the tool location, which is facing the opposite direction to the other tool location UCS, and add the tool location in the 
	 Tool Block dialog.