Mitsubishi CNMA120408 UC5115 Flat-Top Carbide Insert for Cast Iron (10pcs)
30-Day Free Returns
Free Worldwide Shipping
CNMA120408 UC5115
Universal Cast Iron Specialist | Flat-Top Geometry | UC5115 CVD Grade
Engineered for High-Abrasion Resistance
UC5115 Grade (The K-Class Legend): UC5115 is a high-performance CVD (Chemical Vapor Deposition) coated grade specifically developed for K-Class materials (Cast Iron). It features a thick, heat-resistant Alumina (Al2O3) layer that protects the substrate from the severe thermal loads generated during high-speed dry machining.
CNMA Flat-Top Design: The CNMA designation represents the "Non-Chipbreaker" flat-top geometry. Because cast iron chips naturally shatter into small segments, a chipbreaker groove is not only unnecessary but can act as a stress point. The flat-top design maximizes the carbide volume at the cutting edge, providing superior impact resistance against sand inclusions and rough casting skin.
0.8mm Versatile Radius: The 08 (1/32") corner radius is the global standard for semi-roughing to semi-finishing. It is robust enough to handle high feed rates while still delivering an excellent surface finish (Ra) on gray and ductile iron components.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMA120408 | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMA432 | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*Optimized for high-speed dry machining. Use flood coolant only if thermal cracking is not a concern.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (GG25) | 180 - 450 m/min | 0.15 - 0.45 mm/r | 0.80 - 4.50 mm |
| Ductile Cast Iron (GGG60) | 120 - 320 m/min | 0.12 - 0.40 mm/r | 0.80 - 4.00 mm |
Required Tool Holders
Maximum clamping stability for DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UC5115 vs. UC5105
UC5115 (The Versatile One): Use this as your primary grade. It handles everything from gray iron to the tougher nodular irons and can manage moderate interrupted cuts.
UC5105 (The High-Speed Specialist): Switch to UC5105 only for continuous, very high-speed turning of gray iron where wear resistance is the only priority and the setup is perfectly stable.
Search Keywords: CNMA120408 UC5115 price, Mitsubishi cast iron inserts 10pcs, CNMA432 carbide, UC5115 speed and feed, gray iron turning inserts.
Long-tail Keywords: Best carbide inserts for general purpose cast iron turning, Mitsubishi UC5115 vs UC5105 for ductile iron, non-chipbreaker CNMA inserts for abrasive machining, heavy-duty CNC turning with 0.8mm radius, buy Mitsubishi CNMA120408 online.