CMT 314.040.21 Dowel Drill for Through Holes - 5/32" x 40 x 70mm, Right-Hand Rotation is a solid carbide boring bit engineered for clean, precise through-hole drilling in a wide range of panel materials. Built from premium super-micrograin carbide, this right-hand rotation dowel drill delivers exceptional bore quality in hardwood, MDF, particleboard, chipboard, veneered wood, and coated panels - making it a dependable choice for furniture manufacturing, CNC processing centers, and multi-spindle boring operations that demand consistent, splinter-free results hole after hole.

Key Features

• Solid Super-Micrograin Carbide (HWM) Body - provides outstanding wear resistance and the ability to be resharpened an almost infinite number of times, delivering long-term value in high-production environments.
• Curved, Negatively Ground Spurs at the Tip - produce exceptionally clean bore walls with no rough edges or tearout on exit, which is critical when drilling through veneered panels and coated surfaces.
• Centre Point Balanced Design - ensures accurate hole placement and reduces bit wander at entry, improving positional accuracy on CNC boring centers and multi-spindle machines.
• Plunge Edge Extending to the Centre of the Bit - reduces drilling resistance and increases production speed, so the bit cuts through panel material more efficiently with less strain on the machine spindle.
• 2 Precision-Ground Cutting Edges (Z2) with Double Angle - optimize chip evacuation and cutting performance across hardwood and difficult composites such as particle board and MDF.
• 2 Spiral Flutes - promote efficient material removal and help keep the bore clean during through-hole drilling, reducing the risk of clogging or burning in dense materials.
• Parallel Shank with Driving Flat (10 x 26mm) - provides a secure, non-slip grip in machine chucks and boring unit collets, preventing rotation under load.
• Extreme Sharpening Rating - the solid carbide construction means the bit holds its edge longer between sharpenings compared to standard tooling, lowering downtime and maintenance frequency in production settings.
• Right-Hand (RH) Rotation - compatible with standard right-hand spindle configurations on CNC routers, boring centers, and multi-spindle panel processing equipment.

Why This Product

• Engineered specifically for through-hole drilling - unlike general-purpose bits, this dowel drill is purpose-designed to produce clean entry and exit bores without blowout, making it well suited for dowel joinery in panel furniture and cabinet production.
• Compatible with difficult composite materials - the solid carbide construction and negatively ground spur geometry handle abrasive substrates like particle board, MDF, and veneered wood that quickly wear out conventional high-speed steel tooling.
• Designed for high-speed CNC and multi-spindle applications - the bit's geometry reduces drilling resistance and maintains performance on fast-cycle boring units and CNC routers where cycle times and repeatability matter most.
• Resharpenable solid carbide unit adds long-term cost efficiency - because the bit is a single solid carbide piece rather than a brazed assembly, it can be resharpened repeatedly without risk of tip separation, and each resharpening restores full cutting performance.

Specifications

• Manufacturer Part Number: 314.040.21
• Brand: CMT Orange Tools
• Diameter: 4mm (5/32")
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10 x 26mm (parallel shank with driving flat)
• Number of Cutting Edges: 2
• Flutes: 2 spiral flutes
• Material: HWM (solid super-micrograin carbide)
• Rotation: Right-Hand (RH)
• Sharpening: Extreme
• Application Type: Through Hole

Approved Applications

• Through-hole drilling for dowel connections and assembly joinery
• Panel processing in furniture and cabinet manufacturing
• CNC router boring operations
• Multi-spindle and high-speed boring unit applications
• Boring in hardwood, softwood, MDF, HDF, chipboard, particleboard, plywood, veneered wood, and coated panels