CMT 310.080.21 Dowel Drill 5/16" x 27 x 57.5mm RH by CMT is a solid carbide boring bit engineered for precision blind-hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built entirely from premium super-micrograin carbide sourced from Ceratizit, this right-hand rotation dowel drill delivers clean, flat-bottomed bores with no rough edges - making it a reliable choice for dowel joinery in hardwood, MDF, particle board, veneered panels, and difficult composite materials. Its short-series 57.5mm overall length suits multi-spindle CNC boring machines, boring centers, and high-speed panel processing equipment.

Key Features

• Solid super-micrograin carbide construction (HWM) - provides exceptional wear resistance and allows an almost infinite number of resharpenings, significantly extending the usable life of the bit compared to standard steel alternatives.
• 2 curved, negatively ground spurs (V2) - produce exceptionally clean bore walls and flat-bottom holes with no rough edges or tearout, critical for high-quality dowel joints and panel connections.
• Centre-point balanced tip design - ensures accurate hole placement on entry, reducing drift and improving repeatability across high-volume production runs.
• Plunge edge runs to the centre of the bit - reduces drilling resistance and increases production speed, helping maintain throughput on CNC routers and multi-spindle boring units.
• Cylindrical head larger than traditional tips - offers increased resistance to prolonged use, supporting consistent performance across extended production cycles without premature wear.
• 10x27mm parallel shank with driving flat - fits standard boring machine chucks and adapters securely, preventing slippage during high-speed operation.
• 2 spiral flutes (Z2) with 7/8" cutting height - provide efficient chip evacuation during blind-hole drilling, keeping the bore clean and reducing heat buildup.
• Extreme sharpening rating - the solid carbide unit can be resharpened repeatedly without losing structural integrity, making it a cost-effective long-term tooling investment.
• Right-hand (RH) rotation - compatible with standard right-hand spindle boring equipment used throughout panel processing and furniture production.

Why This Product

• Solid carbide construction from Ceratizit super-micrograin material means this dowel drill handles hardwood, MDF, particle board, and coated panels without the premature dulling that affects lower-grade tooling - fewer tool changes per shift.
• The negatively ground curved spurs and centre-balanced tip work together to produce tearout-free bores, which is especially important when drilling veneered or coated panels where surface quality directly affects the finished product.
• Designed specifically for high-speed boring units and CNC routers, this bit's geometry actively reduces drilling resistance - supporting faster feed rates and higher production throughput without sacrificing hole quality.
• The solid carbide construction supports repeated resharpenings, meaning the bit does not need to be discarded when it dulls - a practical advantage for shops managing tooling costs across ongoing production.

Specifications

• Manufacturer Part Number: 310.080.21
• Brand: CMT Orange Tools
• Diameter: 5/16"
• Cutting Height: 7/8"
• Total Length: 57.5mm
• Shank: 10x27mm
• Number of Flutes: 2
• Number of Spurs: 2
• Rotation: Right-hand (RH)
• Material: HWM (solid super-micrograin carbide)
• Sharpening: Extreme

Approved Applications

• Blind hole drilling for dowel connections
• Panel drilling in furniture manufacturing
• Cabinet making and case goods production
• CNC router boring operations
• Multi-spindle boring machine use
• High-speed boring unit applications
• Drilling in hardwood and softwood
• Boring in MDF and HDF
• Drilling in particle board and chipboard
• Processing veneered panels and difficult composites