CMT Dowel Drill for Through Holes - 5/16" x 35 x 70mm Right Hand is a solid carbide boring bit engineered for clean, precise through-hole drilling in furniture manufacturing, panel processing, and dowel joinery applications. Built entirely from premium super micrograin carbide, this 2-flute right-hand drill delivers exceptionally clear bores with no rough edges, making it a reliable choice for hardwood, MDF, particle board, chipboard, and veneered panels. Designed for use on high-speed boring units and CNC routers, it combines industrial-grade performance with a geometry optimized to reduce drilling resistance and maintain accuracy across demanding production environments.

Key Features

• Solid super micrograin carbide construction (HW material grade) - the entire bit is made from premium-quality carbide sourced from Luxembourg, meaning it can be resharpened an almost unlimited number of times and remains a single solid unit for added safety compared to brazed-tip designs.
• Curved, negatively ground spurs at the tip - this unique tip geometry produces exceptionally clean bore walls with no rough edges or tearout, which is critical when drilling through veneered panels, laminates, and coated boards where surface quality matters.
• Centre point balanced tip design - the precision-balanced centre point ensures accurate hole placement and stable entry, reducing walk or drift when drilling at production speed on CNC and multi-spindle boring machines.
• Plunge edge extending to the centre of the bit - reduces drilling resistance during entry, which translates to faster production speeds, less heat buildup, and reduced strain on the boring machine spindle.
• 2 precision-ground spiral flutes (Z2) - the dual-flute configuration ensures efficient chip evacuation through the full 35mm cutting length, keeping the bore clear and preventing material buildup that could degrade hole quality.
• Cylindrical head larger than traditional tips - the oversized head geometry is extremely resistant to prolonged use, extending the interval between sharpenings and reducing downtime in high-volume production settings.
• Parallel shank 10 x 26mm with driving flat and adjustable screw length - the standardized shank format is compatible with multi-spindle CNC boring machines and boring centers, simplifying tool changes and ensuring secure clamping during operation.
• Sharpening classification: Extreme - the bit is rated for extreme resharpening cycles, meaning operators can restore cutting performance multiple times over the tool's life, reducing long-term tooling costs.

Why This Product

• Clean through-holes in difficult materials - the negatively ground spur design and balanced centre point work together to prevent blowout on exit, which is a common problem when drilling through MDF, veneered wood, and coated panels in furniture production.
• Built for continuous production use - the oversized cylindrical head, solid carbide body, and extreme resharpening rating mean this bit stays sharp longer between maintenance intervals, supporting high-volume CNC and multi-spindle boring operations without frequent tool changes.
• Engineered for hardwood and difficult composites - the solid micrograin carbide construction is specifically suited to materials that wear down conventional steel or carbide-tipped bits quickly, including particle board, HDF, and hardwood, giving consistent results across a mixed production workflow.
• Safety advantage of solid carbide construction - because this is a single solid carbide unit rather than a tipped bit, there is no brazed joint that can fail under high-speed operation, offering an additional layer of safety in CNC and industrial boring environments.

Specifications

• Manufacturer Part Number: 314.080.41
• Brand: CMT Orange Tools
• Diameter: 5/16"
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10 x 26mm
• Number of Flutes: 2
• Material: HW (solid super micrograin carbide)
• Rotation: Right Hand (RH)
• Sharpening Rating: Extreme

Approved Applications

• Through-hole drilling for dowel connections and joinery
• Furniture manufacturing and cabinet panel processing
• CNC router and high-speed boring unit operations
• Multi-spindle boring machine and boring center use
• Drilling through hardwood, particle board, MDF, and veneered wood
• Panel processing in coated and laminated board applications