Product Description
CMT 316.060.12 Countersink for 4 Flute Drills by CMT is a left-hand rotation carbide countersink designed to create precise 45 deg. countersunk entries in wood-based sheet goods, solid timber, and engineered panels. With a 16mm cutting diameter and a compact 15mm total length, this two-tooth hardmetal countersink integrates cleanly into multi-spindle boring setups and CNC boring centers where left-hand tooling is required. Its 6mm bore diameter is matched to standard spindle configurations, making it a reliable choice for panel processors and cabinetmakers who need consistent, chip-free countersinking performance in a single pass.
Key Features
- Hardmetal (HW) Cutting Material - tungsten carbide construction delivers long-lasting edge retention through demanding production runs on chipboard, MDF, hardwood, and coated panels, reducing tool change frequency and downtime.
- 45 deg. Countersink Angle - produces a clean, geometrically accurate seat for fasteners and fittings, ensuring flush or recessed results without secondary cleanup operations.
- Left-Hand (LH) Rotation - purpose-built for left-hand spindles on multi-spindle CNC boring machines and panel processing centers, eliminating the risk of using wrong-rotation tooling and the surface damage that causes.
- 16mm Cutting Diameter with 6mm Bore - sized for direct mounting on standard 6mm spindle noses, providing a stable and concentric fit that translates to smooth, vibration-free countersinking.
- Two-Tooth Configuration - the 2-flute geometry balances chip clearance with cutting stability, supporting consistent feed rates through panel materials without chatter or rough entry walls.
- Compact 15mm Total Length - the short body minimizes overhang and deflection, supporting accurate depth control in tightly spaced boring head arrangements.
Why This Product
- Designed specifically for left-hand spindle rotation, this countersink eliminates the compatibility guesswork that comes with mixed-rotation boring heads on CNC panel lines - the correct rotation direction is built into the tool geometry from the start.
- The hardmetal cutting material and 45 deg. angle work together to produce clean, ready-to-assemble countersinks in chipboard, MDF, HDF, and coated panels without requiring a separate deburring or cleaning step.
- A 6mm bore diameter and 15mm overall length fit directly into standard boring machine spindles, making this a drop-in solution for shops running multi-spindle CNC boring centers or panel processing centers with existing LH toolholder setups.
- The two-tooth cutting geometry supports reliable performance across a range of engineered wood substrates, giving production environments a consistent, repeatable countersink profile from the first hole to the last in a shift.
Specifications
- Manufacturer Part Number: 316.060.12
- Cutting Diameter: 16mm
- Bore Diameter: 6mm
- Total Length: 15mm
- Countersink Angle: 45 deg.
- Number of Teeth: 2
- Rotation: Left-Hand (LH)
- Blade Material: Hardmetal (HW)
- Brand: CMT Orange Tools
Approved Applications
- Multi-Spindle CNC Boring Machines
- CNC Boring Centers
- Panel Processing Centers
- Boring Machines with Adapter or Chuck
- Chipboard and Particle Board
- MDF and HDF Panels
- Hardwood and Softwood
- Plywood
- Laminates and Coated Panels
Frequently Asked Questions
What does LH rotation mean and how do I know if my machine requires it?
LH stands for Left-Hand rotation, meaning the tool is designed to spin counterclockwise when viewed from the shank end. Multi-spindle CNC boring machines and panel processing centers often include both right-hand and left-hand spindles in a single boring head. If your machine's spindle rotates counterclockwise, you need a left-hand tool like this one. Installing a right-hand countersink on a left-hand spindle will cause the tool to unscrew or produce poor-quality cuts.
What bore diameter does this countersink accept and what does that mean for compatibility?
This countersink has a 6mm bore diameter, which is a standard size for many multi-spindle boring machine spindle noses and adapter chucks used in cabinet and panel production. Before ordering, confirm your machine's spindle or adapter accepts a 6mm shank bore to ensure a direct, secure fit without additional adapters.
What cutting angle does this countersink produce, and what is it used for?
This tool produces a 45 deg. countersink. This angle creates a conical recess that allows fastener heads or hardware fittings with matching geometry to sit flush or below the panel surface, which is important in furniture construction and cabinetmaking where surface appearance and assembly accuracy matter.
What materials is this countersink suited for?
The hardmetal (HW) construction makes this countersink appropriate for use in common panel processing materials including chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels. The carbide cutting edges maintain sharpness through repeated passes in abrasive engineered wood substrates that would quickly dull high-speed steel alternatives.
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