CMT 375.080.11 4 Flute Dowel Drill for Through Holes by CMT is a precision-engineered, long-series through-hole dowel drill designed for clean, accurate boring in solid wood, chipboard, MDF, HDF, plywood, laminates, and coated panels. With a 5/16 in. diameter, a 40mm cutting height, and a 70mm overall length, this right-hand rotation drill is built to handle through-hole boring across a wide range of panel thicknesses. Constructed from HW (tungsten carbide) material and compatible with multi-spindle CNC boring machines, CNC boring centers, and panel processing equipment, it delivers the tight tolerances and repeatable results that furniture manufacturers and cabinet shops demand.

Key Features

• HW (Tungsten Carbide) Construction - the carbide cutting material maintains a sharp, durable edge through demanding production runs in chipboard, MDF, hardwood, softwood, and laminates, reducing the frequency of tool changes and downtime.
• Through-Hole Geometry (60 deg. sharpening angle) - engineered specifically for through-hole boring, this geometry produces clean entry and exit faces with minimal tearout, making it ideal for visible panel surfaces and finished furniture components.
• 2-Tooth Cutting Configuration - a balanced 2-tooth (flute) arrangement promotes smooth chip evacuation during through-hole drilling, helping to keep the bore wall clean and reduce heat buildup in the cutting zone.
• 5/16 in. Diameter with 40mm Cutting Height - the 40mm cutting height accommodates a broad range of panel thicknesses in a single pass, eliminating the need to reposition or re-chuck when working with standard furniture panels.
• 10x20mm Shank - the precisely dimensioned shank fits directly into standard CNC boring machine chucks and multi-spindle heads, ensuring secure seating and consistent runout for repeatable bore accuracy across production volumes.
• Right-Hand (RH) Rotation - matched to the standard rotation direction of CNC boring centers and panel processing equipment, so the drill can be installed and run without special setup or machine reconfiguration.
• Long-Series Design at 70mm Total Length - the extended 70mm overall length gives clearance for through-hole boring in thicker substrates and makes this drill a practical choice for flexible production environments.

Why This Product

• Purpose-built through-hole geometry with a 60 deg. sharpening angle means both the entry and exit faces of a bore are clean and defined - critical for visible surfaces on cabinet doors, furniture panels, and laminates where tearout is unacceptable.
• The 40mm cutting height in a 70mm long-series body makes this drill versatile across multiple standard panel thicknesses without requiring multiple tool lengths on the same job, simplifying tool management on the shop floor.
• Tungsten carbide (HW) construction delivers the edge retention needed to sustain quality results in abrasive materials like chipboard, MDF, and coated panels - materials that wear down lesser tooling quickly and cause bore quality to degrade mid-run.
• The 10x20mm shank and RH rotation align with standard CNC multi-spindle boring machine specifications, meaning this drill integrates into existing setups without adapter hardware or machine adjustments.

Specifications

• Manufacturer Part Number: 375.080.11
• Brand: CMT Orange Tools
• Diameter: 5/16 in.
• Cutting Height: 40mm
• Total Length: 70mm
• Shank: 10x20mm
• Number of Teeth: 2
• Sharpening / Tooth Geometry: Through holes 60
• Rotation: Right-hand (RH)
• Blade Material: HW (Tungsten Carbide)
• Series: Through Hole Long Series (70mm)

Approved Applications

• Chipboard
• MDF
• HDF
• Hardwood
• Softwood
• Plywood
• Laminates
• Coated Panels

Compatible Machines

• Multi-Spindle CNC Boring Machine
• CNC Boring Center
• Panel Processing Center
• Boring Machine with Adapter or Chuck