Deep Pocket, Deep Cavity, or Deep Slot Milling is one of the hardest problems in machining. This Easy Guide will give you the techniques needed to succeed.
Deep Cavity Milling - In the Loupe Machinist Blog
How to design parts for CNC machining
A variable-depth multi-layer five-axis trochoidal milling method for machining deep freeform 3D slots - ScienceDirect
Five-axis Trochoidal Flank Milling of Deep 3D Cavities - ScienceDirect
Fictiv CNC Machining Design Guide
Milling holes and cavities/pockets
Deep Cavity Milling - In the Loupe Machinist Blog
Six Major CNC Milling Techniques: An Insightful Exploration - CNC Machining Service, Rapid prototyping
CNC Machining Design Guide: Best Practices and Tips