Product Description
CMT 317.160.11 Hinge Boring Bit - 16mm x 57.5mm, Right-Hand Rotation by CMT is engineered for drilling flat-bottom hinge cup holes in cabinet doors, face frames, and panel components. Designed specifically for European-style concealed hinge installation, this 16mm boring bit delivers the precise, clean-walled bores that cup hinges require - making it a reliable choice for cabinetmakers, millwork shops, and furniture manufacturers working on chipboard, MDF, solid wood, and plywood. The parallel shank with driving flat and length adjusting screw allows secure, repeatable positioning in boring machines equipped with adaptors or chucks.
Key Features
- HW (Tungsten Carbide) Cutting Head - the carbide tip material maintains a sharp cutting edge through high-volume production runs, reducing downtime for tool changes on demanding hinge boring applications.
- Precision Balanced Centre Point - centres the bit accurately on the workpiece before the cutters engage, resulting in consistent hole placement critical for proper European concealed hinge alignment.
- 2 Precision Ground HW Cutting Edges (Z2) - dual carbide cutting edges produce flat-bottom bores with minimal tear-out, delivering the smooth floor geometry required for cup hinge seating.
- 2 Negatively Ground Spurs (V2) - the negatively sharpened spurs score the material perimeter cleanly before the cutters remove material, preventing chipout on veneered panels, MDF, and laminated surfaces.
- Super-Strength Steel Body with PTFE Coating - the cutter portion is coated with PTFE (orange or black) which reduces friction and prevents pitch and resin buildup, keeping the bit running cooler and extending its working life.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10x26mm shank interfaces directly with boring machine adaptors or chucks, and the length adjusting screw allows precise depth setting for repeatable hinge cup depths across production runs.
- Right-Hand Rotation - matched to the standard spindle direction of most multi-spindle boring machines and CNC boring centres, so no special setup or reverse-spindle configuration is needed.
Why This Product
- The 16mm diameter is the standard cup size for the vast majority of European concealed hinges, making this bit a direct fit for face-frame and frameless cabinet door hinge installation without requiring custom tooling.
- The combination of negatively ground spurs and precision-ground HW cutting edges means both the wall and the flat bottom of each hole are produced in a single plunge - eliminating the need for secondary cleanup and keeping production moving efficiently.
- PTFE coating on the cutter portion actively resists adhesive and resin deposits, which is especially valuable when boring through chipboard and MDF where binders are present at high concentration - keeping the bit performing consistently across long production cycles.
- The parallel shank with driving flat and length adjusting screw gives repeatable depth control in adaptor-equipped boring machines, reducing setup variation and scrap when running high quantities of cabinet doors or panel components.
Specifications
- Manufacturer Part Number: 317.160.11
- Brand: CMT Orange Tools
- Diameter: 16mm
- Total Length: 57.5mm
- Shank: 10x26mm
- Rotation: Right-Hand (RH)
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Spur 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 bores
- Panel processing on chipboard, MDF, plywood, softwood, and solid hardwood
- Use in boring machines equipped with adaptors or chucks
Frequently Asked Questions
What machines is this hinge boring bit compatible with?
The CMT 317.160.11 is designed for boring machines equipped with adaptors or chucks. The 10x26mm parallel shank with driving flat allows secure mounting in multi-spindle CNC boring machines, boring centres, panel processing centres, and similarly equipped machines. The length adjusting screw enables precise depth setting within the adaptor or chuck.
Why does the spur geometry matter for hinge cup boring?
The 2 negatively ground spurs (V2) on this bit score the perimeter of the hole before the carbide cutting edges remove material from the floor. This sequencing prevents chipout and splintering at the entry edge - which is especially important on veneered chipboard, MDF, and laminated panels where surface finish at the hinge cup rim is visible after installation.
What does the PTFE coating on the cutter do?
The cutter portion of the bit is coated with PTFE (orange or black depending on the unit). PTFE is a low-friction material that resists adhesion of pitch, resin, and glue. This coating reduces buildup on the cutting surfaces when boring resin-rich materials like MDF or chipboard, helping maintain consistent cutting performance and extending the interval between cleanings or resharpenings.
What does "RH" rotation mean and how do I verify my machine is compatible?
RH stands for right-hand rotation, meaning the bit is designed to spin clockwise when viewed from the shank end - the standard direction for the vast majority of boring machine spindles. To verify compatibility, check your machine's spindle rotation specification in its manual. Using a right-hand bit in a left-hand spindle will cause the cutting edges to rub rather than cut, damaging both the bit and the workpiece.
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