A striking example of chatter vibration suppression

We wanted to give an example of how to increase productivity by chatter suppression. Below, you will see two videos of machining an aluminum workpiece with two different cutting conditions. The first cutting condition is selected by a process planner based on recommendations of a tool vendor:



Original cutting conditions used by the client:
15,400 rev/min, ap = 2.5 mm [0.098"] - Unacceptable chatter vibrations!

Having measured the tool dynamics, we determined productivity charts for this specific machine and recommended new cutting conditions which were a lot more aggressive than the first one. Take a look at how we successfully killed the chatter and yet improved the productivity:


New cutting conditions recommended by us: 
17,000 rev/min, ap = 4.5 mm [0.177"] - No chatter yet 200% productivity gain!