Tech Tip: Reducing Chatter in End Milling

Chatter in the form of vibration and noise is a frequent challenge when end milling, causing scalloping and uneven finishes. 

• Ensure that the starting places for speeds and feeds are correct for the workpiece material and the cut.
• Increase the feed, or chipload per tooth/tool.
• Make the workpiece as secure and rigid as possible.
• Reduce excess overhang between the workpiece and spindle.
• Select an end mill with more flutes.
• Check the tool run-out.
• Review the tool geometry to ensure the cutting face, relief, fluting and helix angle are appropriate for the workpiece material.
• If conventional milling, try climb milling.