CMT 308.090.11 Dowel Drill - 23/64" x 1-3/16" x 2-17/64" Right-Hand is a precision-engineered tungsten carbide (HW) dowel boring bit built for clean, flat-bottom blind holes in solid wood, chipboard, MDF, and coated panels. With a 9mm cutting diameter, a 30mm cutting height, and a total length of 57.5mm, this short-series dowel drill is optimized for use in multi-spindle boring machines and CNC machining centers where tight spindle spacing and repeatable hole quality are essential. Its right-hand rotation, 10x20mm parallel shank, and negatively ground spurs make it a reliable choice for furniture production, cabinet manufacturing, and panel processing applications where accurate dowel joinery is required.

Key Features

• Tungsten Carbide (HW) Cutting Material - delivers long-lasting edge retention when boring chipboard, MDF, HDF, hardwood, softwood, and laminated panels, reducing the frequency of tool changes in high-volume production environments.
• Negatively Ground Spurs - sharpened with a negative grind geometry that scores the material cleanly before the main cutting edge engages, producing smooth bore walls and flat-bottom holes with minimal tearout or fiber lifting on both faces of the workpiece.
• 2-Spur, 2-Tooth Configuration - the balanced twin-spur design ensures symmetrical cutting forces, supporting accurate hole positioning and consistent bore quality across repeated drilling cycles.
• 10x20mm Parallel Shank - a purpose-built shank size for direct mounting in standard boring machine spindles or compatible chucks, providing a secure, concentric grip that minimizes runout and supports precise hole depth control.
• Short-Series 57.5mm Total Length - the compact 57.5mm overall length is sized for close spindle-center configurations found in multi-spindle CNC boring centers, allowing dense drill arrays without interference between adjacent spindles.
• Right-Hand (RH) Rotation - matches the standard spindle direction of the vast majority of industrial boring machines, making this bit a direct drop-in fit for most panel processing centers without any setup modification.
• 9mm Cutting Diameter / 30mm Cutting Height - sized precisely for standard 9mm dowel joinery, with a 30mm cutting height that accommodates typical blind-hole depths used in furniture and cabinet panel assembly.

Why This Product

• The negatively ground spur geometry produces clean entry and exit cuts in laminated and coated panels - a critical requirement in furniture manufacturing where visible bore quality directly affects finished product appearance.
• The 9mm diameter and 30mm cutting height are matched to industry-standard dowel joint dimensions, making this bit a ready-fit solution for automated panel boring without the need for custom tooling or adapters.
• The HW (tungsten carbide) construction maintains cutting edge sharpness significantly longer than high-speed steel alternatives in abrasive materials like MDF and chipboard, supporting sustained throughput in production environments.
• At 57.5mm total length with a 10x20mm parallel shank, this drill integrates directly into multi-spindle CNC boring machines and panel processing centers, eliminating compatibility guesswork for standard industrial setups.

Specifications

• Manufacturer Part Number: 308.090.11
• Brand: CMT Orange Tools
• Diameter: 9mm (23/64")
• Cutting Height: 30mm (1-3/16")
• Total Length: 57.5mm (2-17/64")
• Shank: 10x20mm
• Number of Spurs: 2
• Number of Teeth: 2
• Rotation: Right-Hand (RH)
• Sharpening: Negatively ground spurs
• Blade Material: HW (Tungsten Carbide)

Approved Applications

• Chipboard and particleboard panel boring
• MDF and HDF machining
• Hardwood and softwood dowel hole drilling
• Plywood panel processing
• Laminated and coated panel boring
• Blind-hole dowel joinery in furniture and cabinet manufacturing
• Multi-spindle CNC boring machine operations
• CNC boring center and panel processing center applications