Deep, narrow slots are difficult to machine. The long, slender end mills required to machine them are prone to chatter, which makes tighter tolerances difficult to achieve. Deep slots also make chip removal more difficult if the slot is blind.
Recommendations:
- Avoid long corners with long radii.
- Design milled areas so that the end mill length-to-diameter ratio is no greater than 3:1.
To configure this rule, set Mill Tool Depth to Diameter Ratio.
