CMT 316.050.12 Countersink for 4 Flute Drills by CMT is a precision-ground carbide countersink designed for left-hand rotation drilling applications on CNC boring machines and panel processing centers. With a 16mm body diameter, a 45 deg. cutting angle, and a 5mm bore diameter, this tool delivers clean, accurate countersinking results in a compact 15mm overall length - making it a reliable choice for cabinetry, furniture manufacturing, and engineered panel work where consistent hole geometry and smooth entry are essential.

Key Features

• Hard Metal (HW) Carbide Construction - tungsten carbide material provides superior hardness and edge retention, reducing tool wear and extending service intervals in high-cycle production environments.
• 45 deg. Cutting Angle - a precise 45 deg. included angle produces cleanly formed countersinks that seat fasteners flush and evenly, eliminating the need for secondary finishing passes.
• Left-Hand (LH) Rotation - engineered specifically for left-hand spindles commonly found on multi-spindle CNC boring machines, ensuring proper chip evacuation and cutting geometry for the intended spindle type.
• 2-Tooth Cutting Design - dual cutting edges provide balanced cutting forces and smooth surface finishes in the countersink profile, reducing vibration and improving hole consistency.
• 16mm Body Diameter with 5mm Bore - the compact bore diameter fits standard left-hand spindle tooling posts, while the 16mm cutting diameter covers common countersink size requirements in panel and wood machining.
• 15mm Total Length - the short overall length minimizes spindle protrusion and tool deflection, improving positional accuracy in closely spaced boring patterns on CNC equipment.

Why This Product

• Designed specifically for left-hand (LH) rotation spindles, this countersink fits directly into multi-spindle CNC boring machines without requiring adapters or modified toolholding - a direct drop-in solution for LH spindle configurations.
• The HW carbide material sustains sharp cutting edges through repeated production cycles in chipboard, MDF, hardwood, and coated panels, helping shops reduce downtime from frequent tool changes.
• The 45 deg. cutting angle is a widely used standard for furniture and cabinetry hardware, making this countersink compatible with common European-style fastener and hinge-mounting applications.
• At 15mm in total length, this tool is well suited for tightly packed multi-spindle heads where axial space between adjacent drill units is limited - keeping the boring pattern tight and accurate.

Specifications

• Manufacturer Part Number: 316.050.12
• Brand: CMT Orange Tools
• Diameter: 16mm
• Bore Diameter: 5mm
• Total Length: 15mm
• Cutting Angle: 45 deg.
• Number of Teeth: 2
• Rotation: Left-Hand (LH)
• Blade Material: HW (Hard Metal Carbide)

Approved Applications

• Multi-spindle CNC boring machines with left-hand spindles
• CNC boring centers
• Panel processing centers
• Boring machines with adapter or chuck
• Chipboard and particle board countersinking
• MDF and HDF panel machining
• Hardwood and softwood countersinking
• Plywood, laminates, and coated panel processing