CMT 314.030.22 Solid Carbide Dowel Drill for Through Holes - 3 x 27 x 70mm Left-Hand Rotation is a precision-engineered boring bit built for demanding panel processing and furniture manufacturing applications. Constructed entirely from premium super-micrograin carbide sourced from Luxembourg, this 3mm diameter through-hole dowel drill delivers exceptionally clean bores in hardwood, MDF, particle board, chipboard, laminates, and veneered panels. Its left-hand (LH) rotation makes it purpose-designed for multi-spindle CNC boring machines and high-speed boring units where opposing-rotation spindle configurations are required. With a 27mm cutting height and 70mm total length, this bit handles through-hole drilling in panels with reliable precision and long service life between sharpenings.

Key Features

• Solid super-micrograin carbide body (HWM material) - provides exceptional wear resistance, lasting significantly longer between sharpenings compared to standard steel boring bits, and supports an almost infinite number of resharpenings so the tool remains in service long-term.
• Curved, negatively ground spurs at the tip - produce exceptionally clean bore walls with no rough edges or tearout on exit, critical for finished furniture panels and veneered surfaces where surface quality matters.
• Centre-point balanced tip design - ensures accurate bit entry and reduces walking or deflection at the start of the bore, improving hole placement accuracy on CNC and multi-spindle boring equipment.
• Plunge edge extending to the centre of the bit - reduces drilling resistance and increases production speed, allowing faster feed rates without sacrificing hole quality in high-volume panel processing.
• Cylindrical head larger than traditional tips - offers superior resistance to prolonged heavy use, maintaining cutting geometry integrity through extended production runs.
• 2 precision-ground cutting edges (Z2) with double angle and 2 spiral flutes - balance cutting load evenly, evacuate chips efficiently, and contribute to the clean through-hole finish required for dowel joint assembly.
• Premium quality steel shank, 10 x 30mm with driving flat and adjustable screw length - provides a secure, slip-resistant seating in compatible boring machine chucks and spindle holders, reducing vibration during operation.
• Left-hand (LH) rotation - purpose-matched to left-hand spindle positions on multi-spindle boring machines, ensuring correct cutting geometry and clean hole production without requiring spindle modification.
• "V" Point 60 deg. tip geometry - delivers positive engagement on entry and clean breakthrough on exit, making it well-suited for through-hole drilling in panel materials including MDF, HDF, plywood, and coated boards.
• Extreme sharpening rating - indicates the bit is engineered to be resharpened to the highest degree, maximizing the total usable life of the solid carbide tool and reducing long-term tooling cost per hole.

Why This Product

• If your CNC boring center or multi-spindle machine uses left-hand spindle positions, this bit provides the correct LH rotation geometry needed to cut cleanly - using a right-hand bit in an LH spindle position would produce torn, rough bores rather than the clean holes required for dowel joinery.
• The solid super-micrograin carbide construction means this 3mm dowel drill withstands the abrasive demands of particle board, MDF, and laminated panels - materials that rapidly wear conventional high-speed steel bits - allowing it to maintain sharp cutting edges across long production runs.
• The negatively ground curved spurs and centre-balanced point work together to produce flat-bottomed, clean-walled through holes suitable for precision dowel connections in furniture manufacturing, where joint accuracy directly affects assembly fit and finished product quality.
• Because the solid carbide body supports an almost infinite number of resharpenings, this bit offers a lower cost-per-hole over its service life compared to disposable tooling, making it a practical choice for high-volume panel processing operations.

Specifications

• Manufacturer Part Number: 314.030.22
• Brand: CMT Orange Tools
• Description: Dowel Drill for Through Hole 3 x 27 x 70mm LH
• Diameter: 3mm
• Cutting Height: 27mm
• Total Length: 70mm
• Shank: 10 x 30mm
• Rotation: Left-Hand (LH)
• Number of Cutting Edges: 2
• Body Material: HWM (Super-Micrograin Carbide)
• Tip Geometry: "V" Point 60 deg.
• Sharpening Rating: Extreme
• Product Class: BBDD

Approved Applications

• Through-hole drilling for dowel connections and dowel joint assembly
• Panel processing in furniture manufacturing
• Boring in hardwood and solid wood
• Boring in particle board and chipboard
• Boring in MDF and HDF
• Boring in veneered panels and coated boards
• Boring in plywood and laminates
• High-speed multi-spindle boring machine operations
• CNC router and CNC boring center applications
• Panel processing centers handling panels up to 30mm thick