M30 Carbide JIS Features Applications: suitable for the cutting speed, the large chip cross-section, can be worse than the M20 processed under processing conditions, the general cutting of Turning Milling Planing which increased cutting speed, tool path increases, improved wear resistance, toughness. Basic knowledge of carbide cutting tools manufacturing tool material must have high temperature hardness and wear resistance, the necessary bending strength, impact toughness and chemical inertness, good process (machining, forging and heat treatment, etc.), not easily deformed. Usually when high hardness, high wear resistance; flexural strength, impact toughness is also high. However, the higher the hardness, flexural strength and toughness lower. High-speed steel for high flexural strength and impact toughness, and good processability, it is still the most widely used tool material, followed by carbide. Carbide indexable inserts are now coated with a chemical vapor deposition of titanium carbide, titanium nitride, aluminum or composite hard layer hard layer. Evolving physical vapor deposition method not only for carbide cutting tools, can also be used for high-speed steel cutting tools, such as drills, hobs, taps and milling. Hard coating as a hindered chemical diffusion and thermal conductivity of the barrier, so that the wear of the cutting tool is slowed down, the coating life of the blade coating compared to about 1 to 3 times.