CNC Machining Design Guidelines

• Internal Corner Radius — Minimum R0.5mm (ball endmill) or R1mm (corner radius endmill)
• Deep Cavities — Max depth-to-width ratio 4:1 for standard tools, 8:1 with extended
• Thin Walls — Minimum 0.5mm for metals, 1mm for plastics
• Holes — Depth-to-diameter ratio up to 10:1 for through holes, 3:1 for blind holes
• Threads — M2 minimum for standard thread milling/tapping
• Undercuts — Use standard lollipop cutters or EDM for complex undercuts