CMT 313.080.12 Dowel Drill for Through Hole - 5/16" x 27 x 57.5mm Left-Hand is a precision-engineered 2-flute carbide-tipped boring tool built for clean, accurate through-hole drilling in furniture panels, solid wood, chipboard, MDF, and coated laminates. Engineered by CMT for use on multi-spindle CNC boring machines and panel processing centers, this left-hand rotation dowel drill features a hardmetal (HW) cutting head, a PTFE-coated spiral body, and a parallel shank with driving flat - delivering consistent, blowout-free through holes for dowel joinery and cabinet construction applications.

Key Features

• Hardmetal (HW) Cutting Head with 2 Precision-Ground Cutting Edges (Z2) - tungsten carbide construction maintains a sharp, durable edge through high-cycle production drilling, reducing regrind frequency and downtime on the shop floor.
• Precision Balanced Centre Point - centers the drill accurately at the start of each bore, reducing walking and positional error so holes land exactly where they need to for tight dowel fitment.
• 2 Spiral Flutes with PTFE Coating - the orange or black PTFE coating on the spiral portion prevents pitch, resin, and adhesive buildup from clogging the flutes, keeping chips evacuating freely and extending time between cleanings during high-volume panel runs.
• Through-Hole Geometry (60 deg. sharpening angle) - the cutting geometry is optimized specifically for through-hole boring, producing clean entry and exit surfaces without tearout on the backside of the panel.
• Left-Hand (LH) Rotation - designed for left-hand spindle positions on multi-spindle boring machines, allowing symmetric use alongside right-hand drills for complete panel layouts in a single pass.
• Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 26mm shank seats securely in the machine chuck with positive rotational drive and allows fine height adjustment so drilling depth is consistent across every spindle.
• Super-Strength Steel Body - the tool body resists flex and deformation under repeated boring cycles, maintaining dimensional accuracy across the full 57.5mm tool length.

Why This Product

• The through-hole cutting geometry and precision balanced centre point work together to produce clean, accurate bores on both faces of the panel - critical in furniture manufacturing where both sides of a dowel hole are visible or load-bearing.
• The PTFE-coated spiral flutes actively resist adhesive and pitch buildup during continuous panel processing, reducing tool cleaning intervals and keeping production throughput high on demanding CNC boring centers.
• Left-hand rotation matches the spindle configuration of paired boring heads, making this drill a direct-fit solution for balanced multi-spindle setups without requiring additional adapters or modifications.
• With a hardmetal (HW) carbide cutting head and 2 precision-ground edges, this drill is suited for processing chipboard, MDF, HDF, hardwood, softwood, plywood, and coated panels - covering the full range of materials encountered in modern panel processing and cabinet production.

Specifications

• Manufacturer Part Number: 313.080.12
• Brand: CMT Orange Tools
• Diameter: 5/16"
• Cutting Height: 27mm
• Total Length: 57.5mm
• Shank: 10 x 26mm (parallel shank with driving flat)
• Number of Cutting Edges: 2
• Rotation: Left-Hand (LH)
• Blade Material: Hardmetal (HW) Carbide
• Sharpening Type: Through holes 60
• Spiral Coating: Orange or Black PTFE

Approved Applications

• Through-hole drilling for dowel connections in furniture and cabinet assemblies
• Panel processing on multi-spindle CNC boring machines
• Boring through chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
• High-volume production runs on CNC boring centers and panel processing centers
• Paired left-hand spindle positions on symmetrical multi-spindle boring heads