How to Reduce Vibration and Chatter in End Mills
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How to Reduce Vibration and Chatter in End Mills

How to Reduce Vibration and Chatter in End Mills
When chatter arises, it tends to be self-sustaining until the problem is solved properly. This condition causes a poor finish on the part and will damage and significantly reduce the life of end mills. Carbide end mills are especially apt to damage.
When we suffer from chatter problems, the basic reflex action is the reduction of cutting forces. This can be done by:
1. Reducing the number of flutes.
2. Decreasing the chip load per tooth by reducing the feed or increasing the speed or RPM.
3. Reducing the axial or radial depth of cut.
Even if these steps can reduce chatter, slowing down the cutting process is not always the best course of action and reducing the chip load can be harmful to the cutter. The alternative is to improve rigidity and stability:
1. Use a larger end mill with a larger core diameter.
2. Use end mills with reduced clearance or a small circular margin.
3. Use the shortest overhang from spindle nose to tip of tool.
4. Use stub length end mills where possible.
5. Use balanced tool holders.
6. Rework fixture to hold the work piece more securely.
7. Reprogram the cutter path shifting cutting forces into stiffer portions of the work piece.
8. Look for sweet spots in spindle speeds then adjust feed accordingly.
A common source of chatter is the machining of corners. As the end mills enter the corner, the percentage of engagement increases the number of teeth in the cut. This greatly increases the cutting forces, causing chatter.

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  • A&S Carbide Cutting Co., Ltd.
  • Address:469 Xinsheng Road, Gaoxin District, Chengdu, Sichuan, China
  • Tel:+86-28-66707530
  • Fax:+86-28-86129221
  • Email:cuttingtool@attachment8.com
  • Contact Person:Leo Zhang
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