CMT 316.040.11 Countersink for Dowel Drills - 5/32" Bore Diameter, 45 deg. Angle, Right-Hand Rotation by CMT is a precision-engineered carbide countersink designed to work in tandem with 4-flute dowel drills, allowing operators to countersink and drill in a single, efficient pass. Built from hardmetal (carbide) with a 16mm cutting diameter and a compact 15mm total length, this right-hand rotating countersink delivers clean, accurate 45 deg. chamfers in panel processing and wood boring applications. Its 4mm bore diameter seats firmly on compatible drill shanks, making it a reliable addition to CNC boring centers and multi-spindle machines that demand repeatable, high-quality results.

Key Features

• Hardmetal (HW) Carbide Construction - the carbide material holds a sharp edge longer than standard steel tooling, reducing tool change frequency and maintaining consistent countersink quality across high-volume production runs.
• 45 deg. Cutting Angle - matches the standard countersink geometry used for dowel and connector holes in wood panel work, ensuring flush-seating fasteners and clean chamfer profiles without secondary hand-finishing.
• 16mm Cutting Diameter with 4mm Bore - the 16mm diameter creates a generous chamfer zone around the pilot hole while the 4mm bore provides a secure, precise fit on compatible drill shanks, minimizing runout and vibration.
• Right-Hand (RH) Rotation - compatible with standard right-hand spindle machines and boring centers, so no special setup or spindle reversal is needed for integration into existing CNC workflows.
• 2-Tooth Cutting Configuration - dual cutting edges share the chip load evenly, promoting smooth cutting action and reduced heat buildup during continuous boring operations.
• Compact 15mm Total Length - the short overall length minimizes tool overhang and keeps the assembly rigid, supporting accurate chamfer depth control even at higher feed rates.

Why This Product

• Designed specifically to pair with 4-flute dowel drills, this countersink enables drilling and countersinking in one pass - eliminating a separate tool change and boosting throughput on CNC boring centers and multi-spindle machines.
• The carbide (HW) construction means the cutting edges resist wear in demanding materials like chipboard, MDF, hardwood, and coated panels, delivering a longer service life compared to non-carbide alternatives.
• With a standardized 4mm bore diameter and 45 deg. angle geometry, this countersink integrates directly into existing dowel-drilling setups without custom adapters or modified toolholders.
• The right-hand rotation and 2-tooth geometry make this countersink well-suited to production environments where consistent chamfer quality and minimal operator intervention are priorities.

Specifications

• Manufacturer Part Number: 316.040.11
• Brand: CMT Orange Tools
• Cutting Angle: 45 deg.
• Cutting Diameter: 16mm
• Bore Diameter: 4mm
• Total Length: 15mm
• Rotation: Right-Hand (RH)
• Number of Teeth: 2
• Blade Material: Hardmetal Carbide (HW)

Approved Applications

• CNC Multi-Spindle Boring Machines
• CNC Boring Centers
• Panel Processing Centers
• Boring Machines with Compatible Chuck or Adapter
• Chipboard and Particle Board Panel Work
• MDF and HDF Panel Countersinking
• Hardwood and Softwood Dowel-Hole Chamfering
• Plywood, Laminate, and Coated Panel Processing