CMT 311.030.22 Dowel Drill - 3 x 18 x 70mm Left-Hand Rotation is a solid carbide boring bit engineered for high-precision blind hole drilling in panel processing, furniture manufacturing, and cabinet making. Built entirely from premium super-micrograin carbide, this left-hand rotating dowel drill delivers exceptionally clean bores with no rough edges - making it the dependable choice for CNC boring centers, multi-spindle boring machines, and high-speed boring units where consistent, tearout-free results are required across hardwood, MDF, particle board, and veneered composites.

Key Features

• Solid super-micrograin carbide (HWM) construction - provides exceptional wear resistance and allows an almost infinite number of resharpenings, lowering long-term tooling costs in production environments.
• 2 curved, negatively ground spurs (V2) - produce exceptionally clean bore walls and flat-bottom holes with no rough edges or tearout, even in veneered panels and coated surfaces.
• Centre point balanced design - ensures accurate hole positioning on entry, reducing drift and improving consistency across repetitive boring cycles on CNC routers and multi-spindle machines.
• Plunge edge running all the way to the centre of the bit - reduces drilling resistance and increases production speed, meaning less strain on the machine spindle and faster cycle times.
• Left-hand (LH) rotation - matched specifically for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring correct cutting geometry and optimal chip evacuation.
• 2 flute (Z2) spiral design with 18mm cutting height - provides efficient chip clearance during deep blind-hole boring, reducing heat buildup and extending edge life between sharpenings.
• 10 x 40mm parallel shank with driving flat - delivers secure, positive tool engagement in standard boring machine chucks and adapters, preventing slippage under load.
• Extreme sharpening rating - the solid carbide unit can be resharpened repeatedly without losing structural integrity, offering a safety advantage over tipped or brazed alternatives.
• 70mm total length - the long-series format accommodates deeper boring requirements in panel applications where standard-length bits fall short.

Why This Product

• When producing dowel joints in furniture and cabinetry, clean bore walls and a flat bottom are non-negotiable - the negatively ground curved spurs on this bit consistently deliver both, even in difficult composites like MDF and particle board.
• For shops running left-hand spindle positions on multi-spindle CNC boring machines, this LH-rotation bit provides the correct cutting geometry out of the box, eliminating the guesswork of adapting a right-hand tool.
• The solid carbide construction means this bit withstands the demands of high-speed production boring without premature wear - and when edges do dull, the resharpenable solid-unit design keeps the bit in service far longer than disposable alternatives.
• At a 3mm diameter with an 18mm cutting height and 70mm overall length, this bit is sized specifically for dowel boring in panels, giving panel processing centers and CNC boring centers a purpose-matched tool rather than a general-purpose compromise.

Specifications

• Manufacturer Part Number: 311.030.22
• Brand: CMT Orange Tools
• Diameter: 3mm
• Cutting Height: 18mm
• Total Length: 70mm
• Shank: 10 x 40mm
• Rotation: LH (Left-Hand)
• Number of Flutes: 2
• Number of Spurs: 2
• Blade Material: HWM (Super-Micrograin Carbide)
• Sharpening: Extreme

Approved Applications

• Blind hole drilling for dowel connections
• Panel drilling in furniture manufacturing
• Cabinet making and case goods production
• Hardwood and solid wood boring
• Chipboard and particle board processing
• MDF and HDF panel boring
• Veneered wood and coated panel boring
• CNC router boring operations
• High-speed multi-spindle boring machine use
• CNC boring center and panel processing center applications