content: Oh man have I got a story for you. For a while I ran a screw machine.  Now I want making screws and what I was making isn't important. The important thing is I was taking 6 ,1/2 inch round finished blanks 18 feet long and spinning them all at once.  Each blank was spinning and being cut by up to three tools at once.  Once the cuts were done on the about 1 inch part the cutting heads would pull back and the blanks would rotate to the next position.  One full rotation through all positions would finish a part.  It would be cut off and the blank would feed in another inch.  The machine too approximately 40 minutes to finish the whole blanks.  Since I could load and reset the machine in about 15 minutes I was running two of them simultaneously.