CMT 316.100.11 Countersink for 4 Flute Drills by CMT is a precision carbide-tipped countersinking tool engineered for clean, accurate countersinking in a single pass. Designed with a 45 deg. cutting angle and right-hand rotation, this compact countersink tool integrates seamlessly with 4-flute dowel drill configurations to achieve consistent, professional results in panel processing and woodworking operations. With a 20mm diameter and a 10mm bore, this countersink bit is built for use in CNC boring machines and panel processing centers where dimensional accuracy and repeat performance are essential.

Key Features

• Hardmetal (HW) Carbide Construction - tungsten carbide material delivers long-lasting edge retention and consistent cutting performance across dense and engineered wood materials, reducing downtime from frequent tool changes.
• 45 deg. Cutting Angle - produces a standard, widely compatible countersink profile suited for most screw head geometries, ensuring flush or recessed seating without secondary operations.
• Right-Hand (RH) Rotation - matches the standard spindle direction of CNC boring centers and multi-spindle boring machines, allowing direct drop-in compatibility without spindle reconfiguration.
• 2-Tooth Cutting Edge - dual cutting teeth provide a balance of chip clearance and surface finish quality, supporting efficient material removal while keeping the bore wall clean and tear-out-free.
• 10mm Bore Diameter - designed to mount precisely on 10mm parallel shanks or toolholders, providing stable, concentric seating that minimizes runout and improves countersink accuracy.
• Compact 15mm Total Length - short overall length reduces overhang and vibration in the spindle, contributing to improved concentricity and a cleaner countersink entry across repeated cycles.

Why This Product

• The 45 deg. countersink angle and 20mm diameter make this tool a practical choice for operators who need a consistent, flush screw seat in chipboard, MDF, plywood, and coated panels without adjusting toolpaths between materials.
• The hardmetal (HW) carbide construction supports high-cycle production environments - the material holds its edge longer than standard tool steel, reducing the frequency of tool replacement in busy CNC boring operations.
• Right-hand rotation and a 10mm bore ensure straightforward compatibility with standard spindle configurations found on multi-spindle CNC boring machines and panel processing centers, minimizing setup time.
• The short 15mm total length and 2-tooth geometry together reduce vibration and chatter at the cutting zone, which translates to cleaner countersink edges and more consistent depth control across a production run.

Specifications

• Manufacturer Part Number: 316.100.11
• Brand: CMT Orange Tools
• Cutting Angle: 45 deg.
• Diameter: 20mm
• Bore Diameter: 10mm
• Total Length: 15mm
• Rotation: RH (Right-Hand)
• Number of Teeth: 2
• Blade Material: HW (Hardmetal Carbide)

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