CMT Dowel Drill Xtreme - 5mm Diameter, Left-Hand Rotation, 70mm Overall Length is a solid carbide boring bit engineered for high-precision dowel hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built entirely from premium super-micrograin carbide sourced from Luxembourg, this left-hand rotation drill delivers exceptionally clean bores in hardwood, MDF, particle board, and veneered composites. With a 10mm parallel shank, 30mm cutting height, and 70mm total length, it is purpose-built for multi-spindle CNC boring machines and high-speed boring centers where consistent hole quality and extended tool life are critical.

Key Features

• Solid Super-Micrograin Carbide Construction (HWM) - the entire bit is made from one unified piece of premium carbide, providing exceptional wear resistance and the ability to be resharpened an almost infinite number of times, dramatically reducing long-term tooling costs.
• Xtreme Sharpening Grade - precision ground to an extreme sharpness standard, delivering cleaner entry cuts and longer intervals between resharpening compared to standard boring bits, which means less downtime and more consistent bore quality over the tool's life.
• Curved, Negatively Ground Spurs (2 Spurs, V2) - the unique spur geometry scores the material boundary before the main cutting edges engage, producing bore walls that are free of tearout and rough edges - critical for veneered panels and coated boards where surface quality is non-negotiable.
• Centre-Point Balanced Tip - the balanced centre point ensures the drill self-centres accurately on the workpiece, reducing walking and positioning error, which is especially valuable in high-volume CNC and multi-spindle operations where hole-to-hole repeatability is essential.
• Plunge Edge Extending to Centre - reducing drilling resistance from the first moment of contact, this design feature increases production speed and reduces heat buildup, extending cutting edge life in demanding continuous-use environments.
• 2 Cutting Edges and 2 Spiral Flutes (Z2) - the twin-flute configuration efficiently evacuates chips and debris during boring, maintaining a clean cutting zone and preventing chip packing that can cause surface damage or bit breakage.
• Left-Hand (LH) Rotation - specifically designed for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring the correct cutting geometry and chip evacuation direction for those spindle configurations.
• Parallel Shank with Driving Flat - 10mm x 30mm - the driving flat prevents shank slippage under torque loading and allows secure, repeatable clamping in boring machine chucks and tool holders, maintaining precise bore positioning even in high-feed-rate conditions.
• Cylindrical Head Larger Than Traditional Tips - the oversized cylindrical head geometry provides enhanced resistance to lateral stress during prolonged use, reducing the risk of tip fracture or premature wear in difficult composites and dense hardwoods.

Why This Product

• Shops processing large volumes of panel-based furniture need a boring bit that holds its edge through extended runs - the solid carbide HWM construction of this dowel drill supports near-unlimited resharpening cycles, making it a long-term tooling investment rather than a disposable consumable.
• Difficult materials like MDF, particle board, and veneered wood demand a bit that cuts cleanly without tearing the surface - the negatively ground curved spurs and balanced centre point on this drill address exactly that requirement, producing flat-bottomed, smooth-walled blind holes ready for dowel insertion without secondary cleanup.
• CNC routers and high-speed multi-spindle boring units require tooling that can withstand aggressive feed rates - the solid carbide build, plunge edge running to centre, and enlarged cylindrical head are all specifically designed to perform reliably under those high-throughput conditions.
• Left-hand spindle positions require purpose-built LH rotation tooling - using a right-hand bit in a left-hand spindle produces poor bore quality and rapid tool wear, making this LH-specific drill the correct choice for left-side spindle assignments in panel processing centers.

Specifications

• Manufacturer Part Number: 311.050.22
• Brand: CMT Orange Tools
• Diameter: 5mm
• Cutting Height: 30mm
• Total Length: 70mm
• Shank: 10 x 28mm
• Rotation: Left-Hand (LH)
• Number of Cutting Edges: 2
• Number of Spiral Flutes: 2
• Number of Spurs: 2
• Blade Material: HWM Solid Carbide (Super-Micrograin)
• Sharpening Grade: Xtreme
• Spur Type: Curved, Negatively Ground
• Shank Style: Parallel with Driving Flat

Approved Applications

• Blind hole drilling for dowel connections in furniture assembly
• Panel drilling in cabinet making and casework production
• Boring operations in particle board, MDF, and HDF panel products
• Hardwood and difficult composite material drilling
• Veneered panel and coated board processing where tearout-free bores are required
• High-speed multi-spindle CNC boring machine operations
• CNC router boring center applications
• Panel processing center dowel drilling workflows