W (Insert Shape): Trigon shape (an 80-degree included angle, 3-sided configuration). [1, 2, 3, 4]
N (Clearance Angle): 0-degree negative clearance angle. This heavy-duty negative profile provides superior edge strength for cutting high-tensile metals. [1, 2]
M (Tolerance Class): Denotes medium-class manufacturing tolerances on thickness and indexability. [1, 2]
G (Type): Features a cylindrical center hole for secure pin-and-clamp tool holder mounting. [1, 2]
08 (Cutting Edge Length): The outer cutting edge length measures 8.7 mm (fitting a 12.7 mm inscribed circle). [1, 2]
04 (Thickness): The thickness of the carbide body is 4.76 mm. [1, 2]
08 (Corner Radius): A standard 0.8 mm nose radius. It delivers a balanced performance, blending high-feed material removal rate with a smooth surface finish. [1, 2, 3]
CQ (Chipbreaker Designation): Specifies the manufacturer's CQ-type chipbreaker geometry. It is engineered explicitly for excellent chip control during medium-to-heavy turning, preventing long, dangerous stringy bird-nest chips. [1, 2, 3]
Applications & Compatibility
Target Materials: Highly effective for general-purpose machining on carbon steel, alloy steels, and stainless steels.
Holder Compatibility: Fits cleanly into any standard external or internal boring turning holder designed for WNMG 0804 sizes (such as standard MWLNR/L or WWLNR/L tool shanks).
Common Brands: This specific designation is widely manufactured by industrial brands like Kyocera (in grades like CA525/CA530) and Deskar (in grades like LF9018/LF9218).