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I. Materials for Custom Blades
　　The material of a cutting insert is the primary factor determining its cutting performance, significantly influencing machining efficiency, quality, cost, and tool life. The harder the custom‑made insert material, the better its wear resistance; however, higher hardness typically correlates with lower impact toughness, making the material more brittle.
　　II. Geometric Issues in Blade Customization
　　Selecting appropriate geometric angles helps reduce vibration in custom‑made cutting inserts, which in turn makes graphite workpieces less prone to chipping.
　　III. Coatings for Customized Blades
　　Coated cutting tools offer advantages such as high hardness, excellent wear resistance, and a low coefficient of friction.
　　Based on the foregoing discussion of cutting inserts, the material, geometry, coating, edge reinforcement, and machining conditions of the tool each play distinct and indispensable roles in determining the insert’s service life.