CMT Dowel Drill 5/16" x 45 x 70mm Left-Hand Rotation is a solid carbide boring bit engineered for precision blind-hole drilling in furniture manufacturing, cabinet making, and panel processing. Built from premium super micrograin carbide, this left-hand (LH) rotating dowel drill delivers exceptionally clean bores with no rough edges - making it the right choice for demanding applications in hardwood, MDF, particle board, veneered panels, and other difficult composites. Its 70mm total length and 45mm cutting height make it especially suited to deeper boring requirements on multi-spindle CNC boring machines and high-speed boring units.

Key Features

• Super micrograin carbide construction (HW) - solid carbide throughout the entire body means extra safety compared to tipped tools, and the solid unit allows an almost infinite number of resharpenings, dramatically reducing long-term tooling cost.
• Curved, negatively ground spurs (2 spurs) - the unique tip geometry produces exceptionally clear bore walls and flat-bottom holes with no rough edges, so dowel joints seat cleanly without secondary cleanup work.
• Centre-balanced tip design - ensures the drill tracks true on entry, reducing wander and delivering consistent hole placement critical in furniture panel layouts.
• Plunge edge running to the centre of the bit - reduces drilling resistance and increases production speed, meaning faster cycle times on CNC boring centers and multi-spindle machines.
• Cylindrical head larger than traditional tips - provides exceptional resistance to prolonged, repetitive use, so the bit maintains performance through extended production runs.
• Left-hand (LH) rotation - designed specifically for left-hand spindles on multi-spindle boring machines, ensuring correct chip ejection and clean bore entry on the correct side of the panel.
• 10 x 19mm parallel shank - fits standard boring machine chucks and adapters used in CNC boring centers and panel processing equipment without requiring special toolholders.
• 2-flute, 2-spur geometry - balances cutting efficiency with bore quality, maintaining smooth sidewall finish even in abrasive materials like particle board and MDF.

Why This Product

• The solid super micrograin carbide body - sourced from Luxembourg - outlasts conventional carbide-tipped dowel drills in abrasive materials like MDF and particle board, giving production shops a longer interval between tool changes.
• The negatively ground, curved spurs produce clean bore walls and flat bottoms with no rough edges, which is critical when drilling dowel holes in veneered or coated panels where surface tearout is unacceptable.
• The plunge edge extending to the bit centre reduces drilling resistance, which translates directly to faster feed rates and higher throughput on CNC boring centers and high-speed boring units.
• Solid carbide construction allows repeated resharpenings, making this bit a cost-effective long-term investment for shops that run high-volume panel drilling operations in hardwood and difficult composites.

Specifications

• Manufacturer Part Number: 311.580.42
• Brand: CMT Orange Tools
• Diameter: 5/16"
• Cutting Height: 45mm
• Total Length: 70mm
• Shank: 10 x 19mm
• Rotation: Left-Hand (LH)
• Number of Spurs: 2
• Number of Teeth: 2
• Blade Material: HW (Solid Carbide - Super Micrograin)

Approved Applications

• Blind hole drilling for dowel connections in furniture panels
• Panel drilling on multi-spindle CNC boring machines
• Panel drilling on CNC boring centers and panel processing centers
• Drilling on boring machines with adapter or chuck
• High-speed boring unit production
• Hardwood machining
• MDF boring
• Particle board and chipboard drilling
• Veneered wood panel processing
• Furniture manufacturing and cabinet making