The code breakdown reveals its exact dimensional geometry according to standard ISO/ANSI nomenclature:
D: Insert shape (55° Rhombic / Diamond-shaped design).
N: Clearance angle (0° negative rake angle for maximum edge strength, requiring a negative tool holder).
G: Tolerances (Indicates precision-ground tolerances on the insert's height, thickness, and inner circle diameter).
A: Hole/Chipbreaker configuration (Features a smooth, flat top with a plain hole, indicating it has no molded mechanical chipbreaker profile).
15 / 4: Cutting edge length (15.5 mm metric length, or 4/8" (1/2") nominal inch size).
06 / 4: Insert thickness (6.35 mm metric thickness, or 4/16" (1/4") nominal inch size).
08 / 1: Corner nose radius (0.8 mm metric radius, or 1/64" nominal inch radius).
Primary Industry Applications
Hard Part Turning (HPT): Widely used to turn hardened steel alloys (above 45 HRC), tool steels, and cast iron.
High-Speed Machining: Typically made from CBN (PCBN) or Al2O3-based Ceramics to withstand intense friction and extreme cutting temperatures without breaking down.
Finishing Operations: The 55° diamond geometry offers excellent clearance for intricate profiling, contours, and finish-facing cycles.