Cause Solution
Chatter in Aluminum Use FM Series tool with patented Mirror Edge™ chatter reduction geometry and polished flute
Tool overhang too great Select a necked stub tool
Tool length of cut too long Use a stub tool or necked stub tool
Fixturing Re-Fixture to increase rigidity
Tool cutting edges too sharp Hone cutting edge or use T-Process tool
Feedrate too high Reduce feedrate
Depth of cut too deep Reduce depth of cut
Spindle or tool has runout Re-indicate tool in holder