Burrs in CNC Machining – Quick & Effective Fixes

Top Causes for Burs

- Dull tools (#1 by far)
- Excessive feed (esp. aluminum)
- Conventional milling
- Perpendicular exits
- Gummy materials (Al, Cu, SS)

Best Fixes (in order of impact)
- Sharp new tools for finishing
- Climb milling whenever possible
- Lower feed + higher RPM
- Arc/helical toolpath exits
- Higher helix + sharp rake tools

Golden Rule
Most burrs die upstream: sharp tools + climb milling + tuned parameters.