Metal ceramic blade CNMG120408 is a widely used 80 ° diamond shaped, negative rake angle precision machining lathe blade. It has a stronger blade tip angle (80 °) compared to the DNMG series, which makes its cutting edge stronger and more versatile. It is the main blade in semi precision and precision machining of steel, stainless steel, and cast iron.

C: 80 ° diamond shaped blade with 4 available cutting edges. The 80 ° blade tip angle is more sturdy and has stronger impact resistance than the 55 ° (DNMG series).
N: Negative front angle design ensures good overall strength of the blade.
M: There are cylindrical holes and countersunk holes for screw clamping.
G: Double sided chip breaking groove, conducive to chip breakage and discharge.
12: The cutting edge length is 12.7mm.
04: The blade thickness is 4.76mm.
08: The radius of the tool tip arc is 0.8mm. This is a very classic specification. Compared to a 0.4mm tool tip, it ensures surface quality while having better edge strength and a larger feed rate, balancing precision machining and semi precision machining

When the cutting depth is usually below 2.5mm and the feed rate is below 0.25mm/rev, its optimal performance can be achieved

 

❌  Conditions to avoid： 
Rough machining： It is not suitable for rough machining processes with large cutting depth and feed rate.
Intermittent cutting： The toughness of metal ceramic materials is relatively lower than that of hard alloys. When processing surfaces with cast black skin, keyways, and other intermittent surfaces, it is easy to cause blade breakage. Extra care should be taken or a grade with better toughness should be selected.
Wet cutting： Due to its weak resistance to thermal shock, the intense alternation of hot and cold when using cutting fluid may cause thermal cracks in the blade. When conditions permit, dry cutting is the more recommended method.