CNMG120408-PF 4315 is a high-performance 80° rhombic turning insert launched by Coromant, specifically designed for finishing operations of steel, stainless steel, and cast iron. Equipped with advanced CVD multi-layer coating technology and optimized PF chipbreaker, it achieves excellent tool life while ensuring machining precision, making it an ideal choice for automotive manufacturing, general engineering and other fields.

• Multi-layer CVD Coating Protection: TiCN+Al₂O₃+TiN triple-layer coating structure combines ultra-high hardness and excellent thermal stability. The Al₂O₃ layer effectively isolates high temperature in the cutting zone, the TiCN layer enhances wear resistance, and the TiN outer layer reduces friction coefficient, increasing tool life by more than 50% compared with traditional coatings.

• PF Finishing Chipbreaker Design: Optimized for steel finishing, the unique groove structure realizes ultra-low cutting force and smoother chip control, avoiding chip wrapping around workpieces or tip damage. Even when machining long-chip materials (such as St37 structural steel), it can produce short and regular chips, significantly improving processing safety.

• High-Rigidity Carbide Substrate: High-strength carbide substrate ensures insert stability during cutting and reduces precision loss caused by vibration. The 80° rhombic structure with 0.8mm corner radius balances machining efficiency and surface quality, suitable for finishing with cutting depth of 0.1-5mm.

• Neutral Cutting Direction: Supports both left-hand and right-hand machining, improving tool holder utilization; 4 effective cutting edges significantly reduce per-part processing cost, with obvious cost-performance advantage.