CMT Hinge Boring Bit 24 x 57.5mm Right-Hand by CMT is a precision-engineered carbide-tipped boring bit designed for drilling flat-bottom hinge cup holes in cabinet doors, face frames, and panel components. Built for use with boring machines equipped with adaptors or chucks, this 24mm diameter bit delivers the clean, flat-bottomed bores required for European-style concealed hinge installation. Its tungsten carbide (HW) cutting head, PTFE-coated cutter body, and negatively ground spurs work together to produce accurate, splinter-free results across a wide range of wood-based panel materials.

Key Features

• Tungsten Carbide (HW) Cutting Head - the carbide-tipped cutting edges stay sharp longer than standard steel, reducing downtime for resharpening and maintaining consistent bore quality over extended production runs.
• PTFE Coating on Cutter Portion - the orange or black P.T.F.E. coating resists pitch and glue buildup on the cutter body, keeping the bit running clean and extending overall tool life between cleanings.
• Super-Strength Steel Body - the robust steel body absorbs the stresses of repeated boring cycles, providing durability and dimensional stability in high-output cabinet shop environments.
• Precision-Balanced Centre Point - the HW centre point registers accurately on the workpiece surface, preventing the bit from wandering at the start of each bore and ensuring consistent hole placement across production batches.
• 2 Precision-Ground Cutting Edges (Z2) - dual cutting edges produce a balanced cutting action that results in smooth, flat-bottomed holes with minimal tearout, which is critical for proper concealed hinge seating.
• 2 Negatively Ground Spurs (V2) - the negatively set spurs score the material perimeter cleanly before the main cutters remove the core, leaving crisp bore walls without delamination or fiber pullout on veneered panels and MDF.
• Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 26mm parallel shank with driving flat locks positively in chucks and adaptors to prevent slipping under load, while the length adjusting screw allows precise depth setting for consistent hinge cup depth.
• Right-Hand (RH) Rotation - matches the standard spindle direction of conventional boring machines and drill presses, making the bit a straightforward drop-in tool without requiring any special machine configuration.

Why This Product

• The 24mm diameter is the industry-standard size for European concealed hinge cups - choosing this bit ensures the bored hole matches the hinge manufacturer's specified cup diameter for a proper, play-free fit.
• The combination of a carbide (HW) head and negatively ground spurs makes this bit suitable for both solid hardwood and engineered panels such as MDF, chipboard, and plywood - one bit handles the full range of cabinet shop materials without tool changes.
• The PTFE-coated cutter body actively resists resin and adhesive buildup, which is a common cause of premature bit degradation in production environments - this translates to longer intervals between tool maintenance and more consistent hole quality over time.
• The parallel shank with driving flat and length adjusting screw gives machinists repeatable depth control, which is essential when boring hundreds of hinge cups to the same depth in a single production run.

Specifications

• Manufacturer Part Number: 317.240.11
• Brand: CMT Orange Tools
• Diameter: 24mm
• Total Length: 57.5mm
• Shank: 10 x 26mm
• Rotation: Right-Hand (RH)
• Number of Teeth: 2
• Number of Spurs: 2
• Tooth Geometry: Negatively ground spurs
• Material: HW (Tungsten Carbide)
• Product Type: Hinge Boring Bit

Approved Applications

• Drilling flat-bottom hinge cup holes for European concealed hinge installation
• Cabinet door hinge cup boring
• Face frame hinge mounting hole preparation
• Panel component boring on machines equipped with adaptors or chucks