CMT 311.060.12 Dowel Drill 6 x 35 x 70mm Left-Hand by CMT is a precision-engineered 6mm diameter boring bit designed for blind hole drilling in furniture panels, cabinet components, and joinery assemblies. Built with a tungsten carbide (HW) cutting head on a super-strength steel body, this left-hand rotation dowel drill delivers clean, flat-bottom bores for dowel connections in chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels. The 70mm overall length and 35mm cutting height make it well suited for deeper boring requirements in panel processing applications where a standard-length bit would fall short.

Key Features

• Tungsten carbide (HW) cutting head on super-strength steel body - carbide tipped construction maintains sharp cutting edges through high-volume production runs in abrasive engineered wood products like MDF and chipboard, extending tool life significantly compared to standard steel bits.
• PTFE-coated spiral flutes (orange or black coating) - the polytetrafluoroethylene coating on the spiral portion reduces friction and prevents pitch and glue buildup during boring, keeping flutes clear for consistent chip evacuation and uninterrupted cut quality.
• Precision-balanced centre point - the HW centre point self-registers on the panel surface before the cutting edges engage, eliminating bit wander and ensuring hole placement accuracy for tight-tolerance dowel joinery.
• 2 negatively ground spurs (V2 configuration) - negatively set spurs score the panel surface ahead of the cutting edges, producing clean bore walls with no tearout or rough edges on laminates, coated panels, and veneered surfaces.
• 2 precision-ground HW cutting edges with 2 spiral flutes - the twin-flute geometry balances cutting forces on both sides of the bore for vibration-free operation, resulting in a smooth, accurately sized hole ready for dowel insertion without additional finishing.
• Left-hand (LH) rotation - designed specifically for left-hand spindle positions on multi-spindle CNC boring machines and panel processing centers, allowing correct installation at the appropriate spindle location without compromising cut direction or bore quality.
• 10 x 30mm parallel shank with driving flat and length adjusting screw - the parallel shank with driving flat locks securely in the boring machine spindle to prevent rotation under load, while the length adjusting screw enables precise depth setting for repeatable blind hole depth across the full production run.
• 70mm long series length with 35mm cutting height - the extended overall length provides the reach needed for deep blind hole boring in thicker panels and multi-layer assemblies where shorter series bits cannot achieve the required depth.

Why This Product

• The left-hand rotation designation makes this bit a direct, drop-in solution for LH spindle positions on multi-spindle boring machines and CNC boring centers - no adapter or workaround required, and the bit rotates in the correct direction to produce a clean cut rather than tearing the material.
• The combination of negatively ground spurs and a precision-balanced HW centre point addresses two of the most common problems in panel boring - hole placement drift and surface tearout - making this bit appropriate for visible, finished furniture and cabinet faces where hole quality directly affects the final product.
• At 70mm overall length with a 35mm cutting height, this long-series dowel drill reaches bore depths that standard-length bits cannot, making it the right choice when panel thickness or machine geometry demands additional reach beyond what a short-series bit provides.
• The PTFE spiral coating and carbide cutting head work together to maintain consistent performance across large panel batches - the coating keeps flutes clear of adhesive and resin buildup while the carbide edges stay sharp longer, reducing bit changes and downtime in production environments.

Specifications

• Manufacturer Part Number: 311.060.12
• Brand: CMT Orange Tools
• Diameter: 6mm
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10 x 30mm parallel shank with driving flat and length adjusting screw
• Number of Flutes: 2
• Number of Spurs: 2
• Spur Sharpening: Negatively ground spurs
• Number of Cutting Edges: 2
• Blade Material: HW (tungsten carbide)
• Rotation: Left-hand (LH)
• Coating: PTFE (orange or black) on spiral portion

Approved Applications

• Blind hole drilling for dowel connections and dowel joinery
• Panel drilling in furniture manufacturing and cabinet making
• Boring in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
• Left-hand spindle positions on multi-spindle CNC boring machines
• CNC boring centers and panel processing centers
• Boring machines with adapter or chuck capable of accepting a 10mm parallel shank