The CMT Hinge Boring Bit - 15 x 57.5mm Right-Hand is a precision carbide-tipped boring bit engineered for drilling flat-bottom hinge cup holes in cabinet doors, face frames, and panel components. Designed for European-style concealed hinge installation, this bit delivers the clean, flat-bottomed recesses that cup hinges require for proper seating and function. Compatible with boring machines equipped with adaptors or chucks, it brings professional-grade results to cabinet shops and woodworking operations that demand consistent, repeatable accuracy in hinge cup drilling.

Key Features

• Tungsten Carbide (HW) Head with Precision-Balanced Centre Point - the hardmetal cutting head maintains sharp geometry longer than standard steel bits, reducing downtime for resharpening and ensuring consistent hole depth and centering across production runs.
• 2 HW Precision-Ground Cutting Edges (Z2) - dual carbide cutting edges distribute cutting load evenly, resulting in smoother flat-bottom holes and reduced tearout on the bore floor, which is critical for proper hinge cup fitment.
• 2 Negatively Ground Spurs (V2) - the negatively ground spur geometry scribes the hole perimeter cleanly before the cutters remove material, producing crisp, chip-free bore walls with minimal grain tearout in hardwood, softwood, chipboard, MDF, and plywood.
• PTFE-Coated Cutter Portion (Orange or Black Coating) - the polytetrafluoroethylene surface coating on the cutter body prevents pitch and resin buildup, keeping the bit running freely and extending service life between cleanings.
• Super-Strength Steel Body - the alloy steel shank and body provide rigidity under the lateral and axial forces of boring machine operation, reducing bit deflection and maintaining hole position accuracy.
• 10 x 26mm Parallel Shank with Driving Flat and Length Adjusting Screw - the standardized parallel shank with a driving flat seats securely in boring machine adaptors or chucks, and the adjusting screw allows precise depth setting so every cup hole is bored to a consistent depth without manual measurement between cycles.
• Right-Hand (RH) Rotation - matched to standard right-hand rotating boring machine spindles, ensuring proper cutting direction for clean chip evacuation and safe, predictable tool engagement.

Why This Product

• The flat-bottom hole geometry produced by this bit is required for European concealed hinge cups - standard twist drill bits and brad-point bits leave tapered or pointed floors that prevent hinge cups from seating flush and securely.
• The negatively ground spurs combined with the precision-ground HW cutting edges make this bit effective across a wide range of cabinet panel materials including solid hardwood, softwood, chipboard, MDF, and plywood - reducing the need for material-specific tooling changes in mixed-production environments.
• The 10 x 26mm parallel shank with driving flat and length adjusting screw is compatible with boring machines equipped with adaptors or chucks, making this bit a practical fit for multi-spindle CNC boring machines, CNC boring centers, and drill press setups without requiring specialized toolholders.
• The PTFE coating on the cutter portion and the super-strength steel body work together to extend tool life and reduce maintenance intervals - a practical advantage in production cabinet shops where bit changes and cleaning downtime affect throughput.

Specifications

• Manufacturer Part Number: 317.150.11
• Brand: CMT Orange Tools
• Description: Hinge Boring Bit 15 x 57.5mm RH
• Diameter: 15mm
• Total Length: 57.5mm
• Shank: 10 x 26mm
• Rotation: Right-Hand (RH)
• Number of Spurs: 2
• Spur Geometry: Negatively ground spurs
• Number of Cutting Edges: 2
• Material: HW (Hardmetal / Tungsten Carbide)
• Product Type: Hinge Boring Bit

Approved Applications

• Drilling flat-bottom hinge cup holes for European-style concealed hinge installation
• Cabinet door hinge cup boring
• Face frame hinge recess drilling
• Panel processing on boring machines equipped with adaptors or chucks