CMT 310.051.12 Dowel Drill - 13/64" x 1-1/16" x 2-17/64" Left-Hand is a precision-ground, carbide-tipped boring tool engineered for clean, flat-bottom blind holes in panel processing and CNC boring applications. Built by CMT with a tungsten carbide (HW) cutting edge and a PTFE non-stick coating, this left-hand rotating dowel drill is sized at 5.1mm diameter with a 10x27mm parallel shank - making it a direct fit for multi-spindle CNC boring machines, boring centers, and panel processing equipment. Whether you are drilling chipboard, MDF, hardwood, plywood, or coated laminates, this short-series bit delivers consistent hole quality and extended tool life in demanding production environments.

Key Features

• Tungsten Carbide (HW) Cutting Material - carbide construction maintains a sharp cutting edge far longer than high-speed steel, reducing downtime for tool changes during high-volume panel boring operations.
• Negatively Ground Spurs (2 Spurs) - precision-ground negative spur geometry scores the material cleanly before the flutes evacuate waste, producing smooth bore walls and flat-bottom holes free of tearout or fiber lifting in wood composites and laminates.
• 2-Flute Design - twin flutes efficiently clear chips from blind holes, preventing clogging and heat buildup when boring into chipboard, MDF, HDF, solid wood, plywood, or coated panels.
• PTFE Non-Stick Coating - the CMT orange/black PTFE coating resists resin, glue, and pitch adhesion on the spiral, keeping the drill running cleanly across repetitive boring cycles and extending service life between sharpenings.
• Left-Hand (LH) Rotation - the LH rotation direction is matched specifically to left-hand spindle positions on multi-spindle CNC boring machines and panel processing centers, ensuring correct chip ejection direction and surface finish on both faces of a panel.
• 10x27mm Parallel Shank - the standardized shank size seats securely in CNC boring machine spindles and compatible chuck adapters, providing stable clamping and repeatable positioning for tight hole tolerances.
• Short Series at 57.5mm Total Length - the compact 57.5mm overall length (with a 27mm cutting height) minimizes overhang and deflection, contributing to precise hole depth control in blind-hole dowel boring.

Why This Product

• The left-hand rotation is purpose-built for LH spindle positions on multi-spindle boring machines - using the correct rotation direction eliminates counterproductive chip direction and prevents surface damage on panel faces, a problem that arises when a right-hand drill is used in an LH spindle.
• The negatively ground spur geometry combined with carbide construction means clean entry and exit in coated panels and laminates - critical in furniture and cabinetry production where surface quality directly affects final product appearance.
• At a 5.1mm cutting diameter with a 27mm cutting height, this drill is sized for standard dowel-joint boring patterns used in flat-pack and cabinet carcass construction, providing a consistent, accurate fit for 5mm dowels in blind-hole assembly joints.
• The PTFE coating reduces the need for frequent cleaning and sharpening in adhesive-heavy production environments, helping maintain throughput when boring pre-glued or resin-coated panel materials.

Specifications

• Manufacturer Part Number: 310.051.12
• Brand: CMT Orange Tools
• Product Type: Dowel Drill
• Diameter: 5.1mm (13/64")
• Cutting Height: 27mm (1-1/16")
• Total Length: 57.5mm (2-17/64")
• Shank: 10x27mm
• Number of Flutes: 2
• Number of Spurs: 2
• Sharpening: Negatively ground spurs
• Blade Material: Carbide (HW)
• Rotation: Left-Hand (LH)
• Series: Short Series

Approved Applications

• Chipboard
• MDF (Medium-Density Fiberboard)
• HDF (High-Density Fiberboard)
• Hardwood
• Softwood
• Plywood
• Laminates
• Coated Panels

Compatible Machines

• Multi-Spindle CNC Boring Machine
• CNC Boring Center
• Panel Processing Center
• Boring Machine with Adapter or Chuck