CMT 314.060.22 Solid Carbide Dowel Drill for Through Holes - 6 x 30 x 70mm, Left-Hand Rotation is a precision-engineered left-hand boring bit built for high-volume panel drilling and through-hole dowel joinery. Manufactured from premium super-micrograin carbide, this 6mm diameter drill is designed for demanding production environments including CNC boring centers, multi-spindle machines, and panel processing lines. With a total length of 70mm and a cutting height of 35mm, it handles panels up to 30mm thick while delivering clean, blowout-free exit holes in hardwood, MDF, chipboard, plywood, and veneered composites.

Key Features

• Solid HWM super-micrograin carbide body - provides extreme wear resistance and allows an almost infinite number of resharpenings, reducing long-term tooling costs in production settings.
• Curved, negatively ground spurs at the tip - produce exceptionally clean bore walls with no rough edges or tearout on either face of the panel, critical for furniture-grade finishes.
• Centre-balanced point geometry - ensures accurate hole positioning and reduced runout, particularly important on high-speed CNC boring units where precision is non-negotiable.
• Plunge edge extending to the centre of the bit - reduces drilling resistance and increases feed speed in production, meaning more parts per shift without sacrificing hole quality.
• 2 precision-ground cutting edges (Z2) with double-angle geometry and 2 spiral flutes - deliver efficient chip evacuation and balanced cutting forces for consistent through-hole performance across materials.
• Left-hand (LH) rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines, ensuring correct engagement and clean hole entry on the correct face of the panel.
• 10 x 26mm parallel shank with driving flat and adjustable screw length - provides secure, repeatable tool holding in standard boring machine chucks and adapters, minimising vibration and slippage during operation.
• Extreme sharpening rating - the solid carbide construction is re-sharpenable to an extreme degree, giving this bit a significantly longer service life compared to disposable tooling alternatives.

Why This Product

• Built entirely from premium super-micrograin carbide sourced from Luxembourg, this drill maintains cutting performance across difficult composites like particle board, MDF, and veneered panels - materials that quickly dull lower-grade tooling.
• The 70mm overall length and 35mm cutting height make it the correct specification for through-hole boring in panels up to 30mm thick, eliminating the need for longer or shorter bits that compromise performance or clearance.
• Left-hand rotation makes this bit the proper tool for LH spindle stations on multi-spindle CNC boring machines, delivering the same clean hole quality as right-hand counterparts on their respective spindles - no compromise in bore quality by using the wrong rotation.
• Rated for extreme resharpenability as a solid carbide unit, this bit can be returned to full cutting performance multiple times, making it a cost-effective choice for high-output furniture manufacturing and panel processing operations.

Specifications

• Manufacturer Part Number: 314.060.22
• Brand: CMT Orange Tools
• Diameter: 6mm
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10 x 26mm
• Rotation: Left-Hand (LH)
• Number of Cutting Edges: 2
• Body Material: HWM (super-micrograin carbide)
• Sharpening Rating: Extreme
• Application Type: Through Hole

Approved Applications

• Drilling through holes for dowel connections and panel joinery
• Furniture manufacturing and cabinet production
• Panel processing on multi-spindle CNC boring machines
• CNC boring centers and panel processing centers
• Boring machines with adapter or chuck
• Hardwood and softwood through-hole boring
• Chipboard, particle board, and MDF processing
• HDF, plywood, laminates, and coated panel drilling
• Veneered wood and difficult composite materials