CMT Dowel Drill 5 x 35 x 70mm Left-Hand is a solid carbide boring bit engineered for high-precision dowel hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built from premium super micrograin carbide, this left-hand rotation drill bit delivers exceptionally clean, flat-bottom bores in hardwood, MDF, particle board, and veneered panels - making it a go-to choice for CNC boring centers and multi-spindle boring machines alike.

Key Features

• Solid super micrograin carbide construction - the entire bit is machined from premium quality carbide sourced from Luxembourg, enabling a virtually unlimited number of resharpenings and delivering extra safety compared to tipped alternatives. Each resharpening restores full cutting performance, reducing long-term tooling cost.
• Curved, negatively ground spurs (2 spurs) - the unique tip geometry produces exceptionally clean bore walls and flat-bottom holes with no rough edges or tearout, which is critical for tight-fitting dowel joints in furniture and cabinet panels.
• Centre point balanced design - the balanced centre point ensures accurate entry and consistent hole positioning, reducing misalignment on high-speed multi-spindle boring units and CNC routers.
• Plunge edge extends to the centre of the bit - this geometry reduces drilling resistance and increases production speed, so the bit cuts faster with less force and stays sharp longer between resharpening cycles.
• Oversized cylindrical head - the cylindrical shank head is larger than traditional designs, offering exceptional resistance to prolonged, high-cycle use in production environments.
• Left-hand (LH) rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines and CNC boring centers, ensuring correct chip evacuation and clean bore entry on the appropriate spindle stations.
• 10 x 30mm parallel shank - the precisely machined shank seats securely in standard boring machine chucks and adapters, providing stable, vibration-free operation during high-speed boring.
• Ideal for difficult composite materials - rated for hardwood, particle board, MDF, and veneered wood, this bit maintains clean cutting performance even in abrasive engineered panels where lesser bits dull quickly.

Why This Product

• The solid carbide body - rather than a carbide-tipped steel design - means the bit can be resharpened many more times over its service life, making it a durable long-term investment for high-volume panel and furniture production operations.
• The negatively ground spur geometry produces bore walls clean enough for precision dowel joinery without secondary cleanup, which directly reduces cycle time and rework in cabinet and furniture manufacturing workflows.
• With a 35mm cutting height on a 70mm overall length body, this long-series 5mm bit is purpose-built for blind hole boring in panels that require deeper reach than standard-length bits can achieve.
• Tested for use on high-speed boring units and CNC routers, this bit performs reliably in automated, high-throughput production environments - not just benchtop or manual applications.

Specifications

• Manufacturer Part Number: 311.050.42
• Brand: CMT Orange Tools
• Diameter: 5mm
• Cutting Height: 35mm
• Total Length: 70mm
• Shank: 10 x 30mm
• Rotation: Left-Hand (LH)
• Number of Spurs: 2
• Number of Teeth: 2
• Material: HW (Solid Carbide - super micrograin)

Approved Applications

• Blind hole drilling for dowel connections
• Panel drilling in furniture manufacturing
• Cabinet making and case construction
• Boring in hardwood and difficult composite materials
• Drilling in particle board, MDF, and veneered panels
• High-speed multi-spindle CNC boring center operations
• CNC router boring applications