DH451190: The core catalog part number assigned by YG-1.
DH: Represents the Dream Drill product family line, known for high-feed rates and self-centering geometry.
451: Designates the specific sub-series (3xD depth capability short-length drills optimized for Inox / Stainless Steel applications).
190: Points to the nominal tool diameter metric code (19.0 mm).
19.0: Specifies the physical metric Cutting Diameter (D₁ = 19.0 mm.
X20.0: Defines the metric Shank Diameter (D₂ = 20.0 mm). The shank is intentionally larger than the cutting body to provide maximum clamping rigidity in standard CNC collet or hydraulic chucks.
X79: Indicates the total Flute Length (L₂ = 79.0 mm), representing the maximum helical groove space available for continuous chip evacuation.
X131: Details the Overall Tool Length (L₁ = 131.0 mm) from the tip of the drill point to the base of the shank.