CMT 368.080.11 Dowel Drill for Through Holes - 5/16" x 1-11/16" x 2-3/4" RH is a precision-engineered, carbide-tipped boring bit designed for clean, complete through-hole drilling in wood panels and sheet goods. Built by CMT for use in multi-spindle boring machines and CNC panel processing centers, this right-hand rotation drill delivers consistent, splinter-free bores through chipboard, MDF, hardwood, softwood, plywood, and coated laminates. Its long-series geometry makes it the right tool when standard-depth dowel drills fall short - giving woodworking shops and panel fabricators the reach needed to bore through thicker workpieces in a single pass.

Key Features

• Tungsten Carbide (HW) Cutting Material - hard-metal carbide edges hold a sharp cutting edge far longer than high-speed steel, reducing downtime for tool changes and maintaining bore quality over extended production runs.
• 2-Flute Cutting Geometry - dual flutes balance cutting forces and clear chips efficiently, resulting in smooth bore walls and accurate hole diameters with minimal vibration during operation.
• Through-Hole Long-Series Design - a 43mm cutting height (1-11/16") and 70mm total length (2-3/4") allow the bit to pass completely through thicker panels, eliminating the need for back-boring or flip operations.
• Right-Hand (RH) Rotation - matched to the standard spindle direction of most industrial boring machines and CNC centers, ensuring drop-in compatibility without adapter modifications.
• 8x20mm Parallel Shank with Driving Flat - the precision-ground shank seats securely in standard boring machine spindles and chucks, preventing slippage under load and maintaining accurate hole placement.
• 60 deg. Sharpening Angle for Through Holes - the point geometry is optimized for through-boring, producing a clean entry and clean exit on both faces of the panel to minimize tearout on coated or laminated surfaces.
• 5/16" Nominal Diameter - a standard dowel drill size for common joinery applications, producing holes sized for 8mm-equivalent dowel fits used throughout cabinet and furniture assembly.

Why This Product

• When panel thickness requires a bit that exits the back face completely, this long-series through-hole geometry solves the problem that short-series bits cannot - delivering clean, full-penetration bores without secondary operations.
• Carbide (HW) construction means the cutting edges withstand the abrasive qualities of MDF, chipboard, and coated panels far better than standard steel bits, keeping production quality consistent across high-volume runs.
• The 8x20mm parallel shank with driving flat is a direct fit for the spindle format used across a wide range of multi-spindle CNC boring machines and panel processing centers, making this an easy drop-in addition to an existing tooling setup.
• Right-hand rotation and a purpose-built 60 deg. through-hole point geometry work together to deliver clean entry and exit cuts on both faces of laminated and coated panels, protecting finished surfaces from tearout and rework.

Specifications

• Manufacturer Part Number: 368.080.11
• Brand: CMT Orange Tools
• Diameter: 5/16"
• Cutting Height: 43mm (1-11/16")
• Total Length: 70mm (2-3/4")
• Shank: 8x20mm
• Number of Flutes: 2
• Rotation: Right-Hand (RH)
• Blade Material: Carbide (HW)
• Sharpening Angle: Through holes 60 deg.
• Series: Through Hole Long Series

Approved Applications

• Chipboard and particleboard panel boring
• MDF and HDF through-hole drilling
• Solid hardwood and softwood joinery
• Plywood panel fabrication
• Laminated and coated panel processing
• Cabinet box construction and furniture assembly dowel holes
• Multi-spindle CNC boring machine operations
• CNC boring center and panel processing center tooling