English: Case Overview
This hypothetical hardened mold insert drawing includes 3D contours, small pockets, ribs and polished surface requirements. The tooling plan must protect surface quality while avoiding excessive tool wear. Hard milling requires stable toolpaths, low runout and a controlled finishing allowance.
The suggested tool set includes a corner radius carbide end mill for semi-finishing, ball nose end mills for 3D contours, small finishing tools for ribs and a chamfer or deburring tool for safe edges. Tool coating and holder rigidity are important because hardened steel gives little forgiveness when cutting conditions are unstable.
Finishing Strategy
Use semi-finishing to leave uniform stock before the final pass. Choose ball nose step-over according to surface requirement, and tilt the tool when 5-axis machining is available to avoid cutting at the center of the ball. Inspect tool wear before the final surface pass.
Machining Takeaway
For hardened mold inserts, finishing success depends on stock consistency, ball nose tool selection and stable motion more than aggressive cutting speed.
