CMT Four Flute Dowel Drill - 5 x 50 x 85mm Left-Hand Rotation by CMT is a precision carbide-tipped boring tool engineered for clean, flat-bottom blind holes in furniture panels, cabinet components, and solid wood assemblies. Designed for left-hand rotation on multi-spindle CNC boring machines and dedicated panel processing equipment, this long-series dowel drill delivers accurate, splinter-free holes for dowel joinery in chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels - making it a go-to solution for high-volume cabinet making and furniture manufacturing operations.

Key Features

• Tungsten Carbide (HW) Cutting Head with Precision-Balanced Centre Point - the hard-metal tip maintains sharp geometry through demanding production runs, keeping hole depth and diameter consistent from the first bore to the last.
• 2 Precision-Ground HW Cutting Edges (Z2) - carbide-grade cutting faces shear material cleanly at the hole bottom, producing flat floors that seat dowels flush and reduce assembly gaps.
• 2 Negatively Ground Spurs (V2) - the inward-angled spurs score the panel surface ahead of the cutting edges, preventing chipout and tearout on laminates, coated panels, and veneered boards.
• 4 Spiral Flutes - four evacuation channels versus the standard two means chips clear the bore faster, reducing heat buildup, smearing, and the risk of the bit binding in deep blind holes.
• PTFE Coating on the Cutter Portion - the non-stick black or orange PTFE surface resists pitch and adhesive buildup, extending tool life and maintaining consistent cutting performance without frequent cleaning stops.
• Super-Strength Steel Body - the steel shank and body absorb vibration and resist deflection, keeping hole location accuracy tight on repetitive multi-bore operations.
• Parallel Shank with Driving Flat - 10 x 27mm - the flat prevents rotational slip in the machine collet or chuck, and the adjustable length feature lets operators set precise depth stops without additional tooling.
• Left-Hand (LH) Rotation - matches the spindle direction of left-hand boring units on multi-spindle CNC machines, ensuring the spurs and cutting edges engage material correctly rather than rubbing and burning.
• 50mm Cutting Height in a 85mm Overall Length - the long-series format provides the reach needed for deep blind holes while keeping enough shank engagement in the spindle for rigid, chatter-free boring.

Why This Product

• Purpose-built for left-hand spindle positions - most standard dowel drills are right-hand rotation. This LH version is specifically matched to the left-hand boring units found on multi-spindle CNC boring machines and panel processing centers, so the geometry works with the spindle rather than against it.
• Four flutes outpace two-flute alternatives in chip clearance - the four spiral flutes evacuate waste material twice as often per revolution compared to a two-flute design, which is especially valuable in deep 50mm blind holes where chip packing causes overheating and poor hole quality.
• Negatively ground spurs protect expensive panel surfaces - on laminates, high-gloss coated panels, and veneered chipboard, the scored entry from the V2 spurs prevents the surface fracturing that results in rejected panels and rework costs.
• PTFE coating reduces downtime in production environments - because the non-stick surface sheds pitch and glue residue, operators spend less time cleaning tools between runs, keeping boring machines productive during high-volume furniture and cabinet manufacturing shifts.

Specifications

• Manufacturer Part Number: 373.050.12
• Brand: CMT Orange Tools
• Diameter: 5mm
• Cutting Height: 50mm
• Total Length: 85mm
• Shank: 10 x 27mm (parallel shank with driving flat and length adjusting)
• Rotation: Left-Hand (LH)
• Number of Cutting Edges: 2 (Z2)
• Number of Spurs: 2 (V2)
• Number of Flutes: 4
• Spur Sharpening: Negatively ground spurs
• Blade Material: HW (Tungsten Carbide)
• Body Material: Super-strength steel
• Coating: PTFE (black or orange) on cutter portion

Approved Applications

• Drilling blind holes for dowel connections in panel furniture
• Cabinet making and case goods production
• High-volume panel drilling on multi-spindle CNC boring machines
• Boring operations on CNC boring centers and panel processing centers
• Use with boring machine adapters or chucks where LH rotation is required
• Chipboard and particleboard boring
• MDF and HDF panel drilling
• Hardwood and softwood solid-wood joinery
• Plywood assembly drilling
• Laminate and coated panel blind-hole boring