CMT 315.200.12 Countersink for 2 Flute Drills by CMT is a precision left-hand rotation countersink designed to pair with 2-flute dowel drills, enabling simultaneous drilling and countersinking in a single machining pass. With a 20mm outer diameter and a 45 deg. cutting angle, this hardmetal (HW) countersink is engineered for panel processing operations on solid wood, chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels. Its left-hand (LH) rotation makes it the correct tool for use on multi-spindle CNC boring machines and boring centers where LH-rotation spindles are standard. The 5mm - 10mm bore diameter range accommodates a variety of drill shanks, making this a flexible addition to automated panel production workflows.

Key Features

• Left-Hand (LH) Rotation - designed specifically for left-hand spindles on multi-spindle CNC boring machines, ensuring proper cutting direction and clean entry without tool chatter or surface damage.
• 45 deg. Cutting Angle - produces a precisely angled countersink profile that matches standard screw head geometries, reducing the need for secondary finishing passes.
• 20mm Outer Diameter with 5mm - 10mm Bore Range - the generous bore range accommodates multiple drill shank sizes, giving operators flexibility across different machine spindle configurations without requiring separate tooling.
• Hardmetal (HW) Construction - tungsten carbide cutting material delivers exceptional wear resistance and edge retention when machining abrasive sheet materials like chipboard, MDF, and laminates, extending tool service life between sharpenings.
• 2-Tooth (2 Flute) Geometry - dual cutting edges provide balanced cutting forces and smooth chip evacuation, reducing heat buildup and producing consistent countersink profiles across high-volume panel runs.
• Compact 16.5mm Total Length - the short overall length minimizes spindle projection, reducing vibration and improving concentricity in tight multi-spindle boring head configurations.
• Compatible with Drills Ranging 13/64 in. - 25/64 in. Diameter - this sizing range covers common dowel drill diameters used in furniture and cabinetry production, making this countersink a practical fit for existing tooling setups.

Why This Product

• The left-hand rotation and 2-flute countersink geometry allow drilling and countersinking to happen in one synchronized pass on LH-spindle boring machines, reducing cycle times and eliminating a separate countersinking step in panel production.
• Hardmetal (HW) carbide construction handles the abrasive qualities of chipboard, MDF, HDF, and coated panels without rapid edge degradation, keeping tool replacement costs lower over extended production runs.
• The 5mm - 10mm bore diameter range means this single countersink can be mounted across a variety of drill shank sizes, reducing the number of specialty tools required in a multi-spindle machine's tooling inventory.
• At 16.5mm total length, this countersink fits into space-constrained multi-spindle heads where longer tooling would interfere with adjacent spindles, making it a practical choice for dense boring head configurations.

Specifications

• Manufacturer Part Number: 315.200.12
• Brand: CMT Orange Tools
• Cutting Angle: 45 deg.
• Outer Diameter: 20mm
• Bore Diameter: 5mm - 10mm
• Total Length: 16.5mm
• Rotation: Left-Hand (LH)
• Number of Teeth: 2
• Compatible Drill Diameter Range: 13/64 in. - 25/64 in.
• Blade Material: Hardmetal (HW)

Approved Applications

• Multi-Spindle CNC Boring Machine
• CNC Boring Center
• Panel Processing Center
• Boring Machine with Adapter or Chuck
• Chipboard
• MDF
• HDF
• Hardwood
• Softwood
• Plywood
• Laminates
• Coated Panels