Product Description
CMT 316.090.11 Countersink for 4 Flute Drills by CMT is a precision-ground carbide countersink designed to deliver clean, accurate countersunk holes in a single operation. With a 23/64 in. working diameter (18mm), a 45 deg. cutting angle, and right-hand rotation, this tool is engineered for use in multi-spindle boring machines, CNC boring centers, and panel processing equipment where efficiency and hole quality are critical. The hardmetal (HW) cutting material ensures long-lasting edge retention across a wide range of panel products and wood composites, making it a reliable choice for production woodworking environments.
Key Features
- Hardmetal (HW) cutting material - delivers exceptional edge retention and wear resistance, reducing tool changes and downtime in high-volume production runs.
- 45 deg. cutting angle - produces a precise countersink profile that seats fasteners flush and cleanly, eliminating secondary hand-finishing steps.
- 18mm (23/64 in.) diameter - sized for standard countersinking applications on panel materials, ensuring consistent results across repeated operations.
- 9mm bore diameter - compatible with standard mandrel and chuck configurations used in CNC boring centers and multi-spindle machines, simplifying tool setup.
- Right-hand (RH) rotation - matches the standard spindle direction of CNC boring centers and multi-spindle machines, allowing direct drop-in installation without adapter modification.
- 2-tooth (2-flute) geometry - provides efficient chip evacuation and smooth cutting action, helping maintain surface quality on chipboard, MDF, and coated panels.
- Compact 15mm total length - allows use in tight spindle-spacing configurations on multi-spindle boring machines without clearance issues.
Why This Product
- The hardmetal (HW) construction means this countersink holds its cutting edge significantly longer than standard steel alternatives, making it a cost-effective choice for production environments processing chipboard, MDF, hardwood, and coated panels.
- The 45 deg. cutting angle is purpose-matched to standard fastener head profiles, so countersunk holes are ready for assembly without rework or adjustment - saving time on every panel processed.
- With a 9mm bore diameter and compact 15mm overall length, this countersink integrates directly into CNC boring centers and multi-spindle machines, minimizing setup time and maximizing machine compatibility.
- Right-hand rotation and a clean 2-flute design work together to deliver consistent hole quality across softwood, hardwood, plywood, laminates, and composite panels - reducing scrap and rework in cabinet and furniture production.
Specifications
- Manufacturer Part Number: 316.090.11
- Brand: CMT Orange Tools
- Diameter: 18mm (23/64 in.)
- Bore Diameter: 9mm
- Total Length: 15mm
- Cutting Angle: 45 deg.
- Number of Teeth: 2
- Rotation: Right-hand (RH)
- Material: HW (Hardmetal)
Approved Applications
- Chipboard
- MDF
- HDF
- Hardwood
- Softwood
- Plywood
- Laminates
- Coated Panels
Frequently Asked Questions
What machines is the CMT 316.090.11 countersink compatible with?
This countersink is designed for use in multi-spindle CNC boring machines, CNC boring centers, panel processing centers, and boring machines equipped with an adapter or chuck. The 9mm bore diameter and right-hand rotation match the standard configurations of these machine types.
What is the cutting angle of this countersink, and why does it matter?
The cutting angle is 45 deg. This angle is matched to standard fastener head profiles used in cabinet and furniture assembly, so countersunk holes accept screws and fasteners flush without additional hand-finishing or adjustment.
What materials can this countersink be used on?
The CMT 316.090.11 is suitable for use on chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels. The hardmetal (HW) cutting material handles the abrasive properties of composite and engineered wood products without rapid edge wear.
How many flutes does this countersink have, and how does that affect performance?
This countersink has 2 teeth (flutes). The 2-flute geometry promotes efficient chip clearance during cutting, helping to maintain a clean hole wall and smooth countersink profile on panel materials including laminates and coated surfaces.
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