CMT Dowel Drill 5 x 27 x 57.5mm Left-Hand Rotation by CMT is a precision solid carbide boring bit engineered for clean, accurate blind holes in a wide range of panel and solid wood materials. Built entirely from premium super micrograin carbide sourced from Ceratizit in Luxembourg, this short-series dowel drill delivers the consistency and durability demanded by furniture manufacturing, cabinet making, and high-volume panel processing operations. Its left-hand rotation makes it the correct choice for LH spindle positions on multi-spindle boring machines and CNC boring centers, ensuring proper cutting geometry and chip evacuation on every pass.

Key Features

• Full Solid Carbide (HW) Construction - the entire bit body is made from super micrograin carbide, not just the tip, resulting in superior rigidity, longer service life, and consistent bore quality across high-volume production runs compared to steel-bodied alternatives.
• Curved, Negatively Ground Spurs (2 Spurs) - the unique spur geometry scores the material cleanly at the bore perimeter before the carbide clears the waste, producing exceptionally clean bore walls and flat-bottomed holes with no rough edges or tearout - critical for dowel joints and visible panel surfaces.
• Centre-Point Balanced Tip Design - the balanced center point keeps the drill from wandering on entry, delivering accurate hole placement and true cylindrical bores that align perfectly for dowel assembly.
• 2-Flute Cutting Geometry - two cutting edges work together to reduce cutting force, promote efficient chip clearance from blind holes, and maintain a smooth, flat bottom suitable for tight-tolerance dowel connections.
• Enlarged Cylindrical Head - the head diameter is larger than traditional boring bit designs, providing greater resistance to deflection and prolonged performance even under continuous production loads.
• Left-Hand (LH) Rotation - purpose-built for LH spindle positions on multi-spindle boring machines and CNC panels centers, ensuring the cutting edges engage correctly and do not back off during operation.
• Extreme Sharpening Classification - rated for extreme resharpening, meaning the bit can be reconditioned multiple times, reducing long-term tooling cost per hole.
• 10 x 27mm Parallel Shank - the robust shank interfaces securely with standard boring machine chucks and adapters, minimizing runout and vibration for precise, repeatable results.

Why This Product

• Solid carbide throughout - not just tipped - because the entire tool is made from Ceratizit super micrograin carbide, it withstands the abrasive demands of chipboard, MDF, HDF, laminates, and coated panels without the tip separation risk that can occur with bonded-tip designs. This translates directly to fewer tool changes and less downtime on the production floor.
• Engineered specifically for dowel connection accuracy - the centre-balanced tip and negatively ground spurs work together to produce hole geometry that meets the tight tolerances required for reliable dowel joints in furniture and cabinet carcasses, reducing assembly defects and rework.
• LH rotation for correct spindle pairing - choosing the wrong rotation direction causes poor cut quality and accelerated wear. This drill is purpose-built left-hand, so it pairs correctly with LH spindle positions without any modification or compromise.
• Resharpenable design extends value over time - the extreme sharpening rating means tooling costs can be spread across multiple sharpenings rather than treating this as a single-use consumable, making it a practical choice for shops running sustained production volumes.

Specifications

• Manufacturer Part Number: 310.050.42
• Brand: CMT Orange Tools
• Diameter: 5mm
• Cutting Height: 27mm
• Total Length: 57.5mm
• Shank: 10 x 27mm
• Number of Spurs: 2
• Number of Teeth: 2
• Rotation: Left-Hand (LH)
• Blade Material: HW (Solid Carbide)
• Sharpening: Extreme

Approved Applications

• Drilling blind holes for dowel connections in furniture and cabinet assembly
• Panel drilling on multi-spindle CNC boring machines
• Boring operations in CNC boring centers and panel processing centers
• Use in boring machines fitted with an adapter or chuck compatible with a 10 x 27mm shank
• Hole boring in solid wood (hardwood and softwood), chipboard, MDF, HDF, plywood, laminates, and coated panels
• High-volume furniture manufacturing and cabinet making production environments