CMT 311.080.41 Dowel Drill 5/16" x 35 x 70mm RH is a solid carbide boring bit engineered for high-speed panel boring, CNC routing, and precision dowel joinery. Built from premium super micrograin carbide, this right-hand rotation drill delivers exceptionally clean, flat-bottom blind holes in hardwood, MDF, particle board, and veneered panels - making it a go-to choice for furniture manufacturing and cabinet production where bore quality directly affects joint strength and assembly fit.

Key Features

• Solid super micrograin carbide construction (HW material) - provides extreme rigidity and wear resistance throughout the full body of the bit, supporting an almost infinite number of resharpenings and reducing total cost of ownership over time.
• Curved, negatively ground spurs (2 spurs) - slice cleanly into the workpiece surface before the body follows, producing bore walls and entry edges that are smooth and free of tear-out, which is critical for veneered or coated panels where surface quality matters.
• Centre-balanced tip geometry - keeps the drill tracking true from the moment it enters the material, reducing wander and ensuring consistent hole placement across high-volume production runs.
• Plunge edge extending to the bit centre - reduces cutting resistance as the bit advances through the material, allowing faster feed rates and higher throughput on multi-spindle boring units and CNC machining centers.
• Oversized cylindrical head (larger than traditional tips) - resists deformation and wear during prolonged production use, maintaining dimensional accuracy between sharpening intervals.
• Extreme sharpening rating - the solid carbide unit can be resharpened repeatedly without compromising the tool's structural integrity, unlike carbide-tipped steel-body alternatives where the bond between tip and body limits resharpening cycles.
• 2-flute, 35mm cutting height in a 70mm overall length - delivers adequate depth capacity for standard dowel blind holes while keeping the overall tool compact enough for close-spacing boring patterns on multi-spindle machines.
• 10x30mm shank - provides a secure, positive grip in standard boring machine chucks and CNC tool holders, minimizing runout and vibration during high-speed operation.
• Right-hand (RH) rotation - compatible with the vast majority of conventional boring machine spindles and CNC boring centers without requiring special adapters or spindle direction changes.

Why This Product

• Solid carbide outperforms carbide-tipped alternatives in difficult composites - because the entire bit is carbide rather than a tipped steel body, it handles abrasive materials like particle board and MDF without edge degradation, making it well suited for high-cycle furniture and cabinet production.
• Bore quality is built into the geometry, not achieved by slowing down - the negatively ground curved spurs and centre-balanced tip work together to produce clean, accurate holes at production feed rates, so you do not have to sacrifice speed to achieve a clean bore entry or flat bottom.
• Designed specifically for CNC routers and high-speed boring units - the plunge-to-centre edge geometry and oversized cylindrical head are engineered to perform reliably under the continuous duty cycles and spindle speeds typical of automated panel processing equipment.
• Resharpenable solid carbide unit adds long-term value - because the bit is a single piece of carbide with an extreme resharpening rating, shops can recondition the tool rather than replace it, reducing tooling cost per hole over the life of the bit.

Specifications

• Manufacturer Part Number: 311.080.41
• Brand: CMT Orange Tools
• Diameter: 5/16"
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10x30mm
• Number of Spurs: 2
• Number of Flutes: 2
• Rotation: Right-hand (RH)
• Material: HW (solid super micrograin carbide)
• Sharpening Rating: Extreme

Approved Applications

• Drilling blind holes for dowel connections and dowel joinery
• Panel drilling in furniture manufacturing and cabinet making
• High-speed boring on multi-spindle CNC boring machines
• Panel processing on CNC boring centers and panel processing centers
• Boring in hardwood, particle board, MDF, and veneered wood
• Machining difficult composites and coated panels where bore surface quality is critical