CMT 310.050.22 Dowel Drill - 5 x 22 x 57.5mm Left-Hand Rotation is a solid carbide boring bit engineered for precise, clean blind-hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built entirely from premium super-micrograin carbide sourced from Ceratizit in Luxemburg, this left-hand rotation dowel drill delivers exceptional bore quality in hardwood, MDF, particle board, veneered panels, and difficult composite materials. Its compact 57.5mm overall length and 10x27mm parallel shank make it a direct fit for multi-spindle CNC boring machines, high-speed boring units, and CNC routers where reliable, repeatable dowel hole placement is critical.

Key Features

• Solid super-micrograin carbide construction (HWM material) - the entire bit is made from premium Ceratizit carbide rather than a carbide-tipped steel body, giving it extreme wear resistance and the ability to withstand an almost infinite number of resharpenings, reducing long-term tooling cost.
• 2 curved, negatively ground spurs (V2) - the unique spur geometry scores the perimeter of the bore cleanly before the cutting edges engage, producing exceptionally clear bore walls and flat-bottom holes with no rough edges or tearout - essential for dowel joinery in veneered and coated panels.
• Centre-point balanced tip design - the balanced centre point locates accurately on the workpiece before cutting begins, reducing walking and ensuring consistent hole positioning across high-volume production runs.
• Plunge edge running to the centre of the bit - reduces drilling resistance and increases production speed, allowing faster feed rates without compromising hole quality on CNC boring centers and multi-spindle machines.
• 2 cutting edges and 2 spiral flutes (Z2) - the dual-flute configuration efficiently evacuates chips from the bore, preventing clogging and heat buildup during continuous production drilling in chipboard, MDF, and hardwood.
• Left-hand (LH) rotation - designed specifically for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring correct cutting geometry and clean hole entry on the appropriate machine stations.
• 10x27mm parallel shank with driving flat - the driving flat provides positive rotational engagement in the spindle chuck, preventing slippage under load and maintaining accurate hole depth during repetitive drilling cycles.
• Extreme sharpening rating - rated for extreme resharpenings, this solid carbide unit can be reground multiple times to factory geometry, extending service life far beyond brazed-tip alternatives and lowering cost-per-hole over time.
• Cylindrical head larger than traditional tips - the oversized cylindrical head is extremely resistant to prolonged use, maintaining bore diameter consistency and structural integrity even under the demands of high-speed production environments.

Why This Product

• Furniture and cabinet manufacturers running left-hand spindle stations need a boring bit with correct LH rotation geometry - this drill is built specifically for that application, ensuring proper cutting action rather than rubbing or burnishing the bore wall.
• For shops drilling difficult composites such as particle board, MDF, and veneered wood where tearout ruins finished panels, the negatively ground curved spurs produce clean entry cuts that protect surface veneers and laminate faces without additional scoring steps.
• The all-carbide solid construction means the bit can be resharpened repeatedly to the same geometry - unlike carbide-tipped steel bits that lose tip integrity after a limited number of grinds, making this a longer-term tooling investment for high-volume production environments.
• With a 5mm bore diameter, 22mm cutting height, and compact 57.5mm total length, this bit is sized for standard dowel connection drilling on panel processing centers and multi-spindle CNC boring machines where space between spindles is fixed and overall bit length must conform to machine specifications.

Specifications

• Manufacturer Part Number: 310.050.22
• Brand: CMT Orange Tools
• Diameter: 5mm
• Cutting Height: 7/8 in.
• Total Length: 57.5mm
• Shank: 10x27mm
• Number of Spurs: 2
• Number of Teeth: 2
• Rotation: LH (Left-Hand)
• Material: HWM (Super-Micrograin Solid Carbide)
• Sharpening Rating: Extreme

Approved Applications

• Blind hole drilling for dowel connections in furniture assembly
• Panel drilling on multi-spindle CNC boring machines
• Cabinet making and case construction
• High-speed production drilling on CNC boring centers and panel processing centers
• Drilling in hardwood and softwood
• Drilling in particle board, chipboard, and MDF
• Drilling in veneered panels and difficult composite materials