CMT 314.050.22 Dowel Drill for Through Holes - 5 x 40 x 70mm Left-Hand Rotation is a precision solid carbide boring bit engineered for clean, accurate through-hole drilling in demanding panel processing and furniture manufacturing environments. Built entirely from premium super-micrograin carbide sourced from Luxembourg, this left-hand rotation dowel drill delivers consistently smooth bore walls in hardwood, MDF, chipboard, particle board, plywood, coated panels, and veneered composites. Whether running on a multi-spindle CNC boring machine or a high-speed boring unit, this bit is designed to reduce drilling resistance, minimize blowout, and maintain sharpness over extended production runs.

Key Features

• Solid super-micrograin carbide construction - the entire bit body is made from premium HWM carbide, delivering extreme wear resistance and allowing an almost infinite number of resharpenings, which extends the tool's working life and lowers long-term cost per hole.
• Unique curved, negatively ground spurs at the tip - produces exceptionally clean bore walls with no rough edges or tearout on entry or exit, critical for furniture-grade panels and veneered surfaces where surface quality cannot be compromised.
• Centre-point-balanced tip geometry - ensures accurate hole placement and eliminates bit wander during plunge entry, reducing setup time and improving positional repeatability on CNC boring centers.
• Plunge edge running to the centre of the bit - reduces drilling resistance and increases production speed, allowing faster cycle times on high-speed boring units without sacrificing hole quality.
• 2 precision-ground cutting edges (Z2) with double angle and 2 spiral flutes - clears chips efficiently and maintains cut geometry over extended use, supporting consistent results across large production batches.
• Left-hand (LH) rotation - specifically designed for left-hand spindle positions on multi-spindle boring machines, ensuring correct cutting direction and proper chip evacuation on the appropriate machine spindles.
• Premium quality super-strength steel shank - 10 x 26mm parallel shank with driving flat and adjustable screw length - provides secure, slip-free seating in compatible boring machine chucks and adapters, preventing tool movement under load.
• Extreme sharpening rating - the solid carbide unit can be resharpened to a very high standard repeatedly, maintaining precise geometry and extending the usable life of the bit far beyond carbide-tipped alternatives.
• Optimized cylindrical head larger than traditional tips - offers superior resistance to prolonged use and mechanical stress, reducing the risk of bit failure during high-volume panel boring operations.

Why This Product

• Built for demanding panel processing - the solid super-micrograin carbide construction and negatively ground spur geometry make this bit a reliable choice for difficult composites like MDF, particle board, and veneered wood where softer tooling causes tearout and premature wear.
• Designed for CNC and high-speed boring environments - the reduced drilling resistance from the centre-reaching plunge edge and the precision-balanced tip support faster feed rates and tighter positional tolerances on CNC boring centers and multi-spindle machines.
• Long service life with resharpening potential - because the bit is a solid carbide unit rather than a carbide-tipped assembly, it can be resharpened an almost unlimited number of times without losing structural integrity, making it a cost-effective investment for production shops.
• Correct spindle compatibility out of the box - left-hand rotation and the standardized 10 x 26mm shank with driving flat mean this bit slots directly into the left-hand spindle positions of compatible boring machines without modification or adapter guesswork.

Specifications

• Manufacturer Part Number: 314.050.22
• Brand: CMT Orange Tools
• Description: Dowel Drill for Through Hole 5 x 40 x 70mm LH
• Diameter: 5mm
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10 x 26mm
• Number of Teeth: 2
• Rotation: LH (Left-Hand)
• Material: HWM (Super-Micrograin Solid Carbide)
• Sharpening Rating: Extreme

Approved Applications

• Drilling through holes for dowel joinery connections
• Panel processing and case goods manufacturing
• Furniture manufacturing and cabinet production
• Through-hole boring in hardwood and softwood
• Through-hole boring in chipboard and particle board
• Through-hole boring in MDF and HDF panels
• Through-hole boring in plywood and coated panels
• Through-hole boring in veneered wood composites
• CNC router and high-speed boring unit operations
• Multi-spindle CNC boring machine production runs