The CMT Hinge Boring Bit 35 x 57.5mm Right-Hand is a precision-engineered tungsten carbide-tipped boring tool designed for drilling flat-bottom hinge cup holes in cabinet doors, face frames, and panel components. Built around a super-strength steel body with a carbide (HW) head, this 35mm bit delivers the consistent bore geometry that European-style concealed hinge installation demands. With a parallel shank featuring a driving flat and length adjusting screw, it is compatible with boring machines equipped with adaptors or chucks, making it a reliable choice for cabinetmakers, millwork shops, and furniture manufacturers working with a wide range of engineered and solid wood materials.

Key Features

• HW (Tungsten Carbide) Head with Precision Balanced Centre Point - maintains accurate bore positioning from the first contact, reducing wander and ensuring repeatable hole placement across production runs.
• 2 HW Precision Ground Cutting Edges (Z2) - dual carbide cutting edges deliver a clean, flat-bottom bore with minimal tearout, which is critical for proper seating of European concealed hinges.
• 2 Negatively Ground Spurs (V2) - score the material perimeter before the main cutters engage, producing crisp, chip-free bore walls in solid hardwood, MDF, chipboard, and plywood.
• Super-Strength Steel Body with PTFE Coating - the cutter portion is coated with orange or black P.T.F.E., preventing pitch and resin buildup so the bit stays cleaner longer and requires less downtime for maintenance.
• Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 26mm shank seats securely in machine adaptors or chucks, and the adjusting screw allows precise depth setting for consistent hinge cup depth across every door.
• Right-Hand (RH) Rotation - matches the standard spindle direction of conventional boring machines and drill presses, ensuring immediate compatibility without adapter modifications.

Why This Product

• The flat-bottom bore geometry produced by the negatively ground spurs and precision carbide cutting edges is specifically required for European concealed hinge cups - this is not a general-purpose bit, it is purpose-built for that exact application.
• The PTFE-coated cutter portion resists pitch and glue buildup, which translates directly to longer tool life and fewer tool changes during high-volume cabinet door production.
• The 10 x 26mm parallel shank with driving flat and length adjusting screw provides a secure, repeatable setup in machines equipped with adaptors or chucks, reducing setup time between jobs.
• With 2 HW precision ground cutting edges and 2 negatively ground spurs working together, this bit handles solid hardwood, softwood, MDF, chipboard, and plywood cleanly - covering the full range of panel materials found in modern cabinet and furniture shops.

Specifications

• Manufacturer Part Number: 317.350.11
• Brand: CMT Orange Tools
• Diameter: 35mm
• Total Length: 57.5mm
• Shank: 10 x 26mm
• Rotation: Right-Hand (RH)
• Number of Cutting Edges: 2 (Z2)
• Number of Spurs: 2 (V2)
• Spur Geometry: Negatively ground spurs
• Head Material: HW (Tungsten Carbide)
• Body Material: Super-strength steel with P.T.F.E. coating
• Parallel Shank Features: Driving flat and length adjusting screw
• Product Type: Hinge Boring Bit

Approved Applications

• Drilling flat-bottom hinge cup holes for European-style concealed hinge installation
• Cabinet door hinge boring
• Face frame and panel component boring
• Use in boring machines equipped with adaptors or chucks
• Compatible materials: solid hardwood, softwood, chipboard, MDF, plywood

Frequently Asked Questions

What machines is this hinge boring bit compatible with?

This bit is designed for boring machines equipped with adaptors or chucks. The 10 x 26mm parallel shank features a driving flat and a length adjusting screw that secures the bit firmly and allows precise depth setting in compatible machine setups.

Why are negatively ground spurs important for hinge cup boring?

The 2 negatively ground spurs score the material perimeter before the main cutting edges remove material. This sequencing prevents fiber tearout at the rim of the bore, producing clean, smooth-walled holes in materials such as solid hardwood, MDF, chipboard, and plywood - results that are essential for a tight, professional hinge cup fit.

What is the purpose of the P.T.F.E. coating on the cutter portion?

The orange or black P.T.F.E. coating applied to the cutter portion of the bit prevents pitch and glue buildup during boring operations. This keeps the cutting geometry clear, reduces friction, and extends the working life of the tool between sharpenings or replacements.

What bore diameter and depth does this bit produce?

This bit bores a 35mm diameter flat-bottom hole, which is the standard cup diameter for European concealed hinges. The total bit length is 57.5mm, and the length adjusting screw on the parallel shank allows the operator to set a consistent bore depth across repeated operations.