Product Description
CMT Hinge Boring Bit 16 x 70mm Right-Hand by CMT is a long-series hinge cup boring bit engineered for drilling precise flat-bottom holes required by European-style concealed hinge installation. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this bit delivers repeatable, clean bores in cabinet door and panel components - making it the right tool for cabinetmakers, CNC operators, and shop professionals working with concealed hinge systems. The PTFE-coated spiral flutes resist pitch and resin buildup, keeping the cutting action smooth across extended production runs in solid wood, sheet goods, and composite panels.
Key Features
- Tungsten Carbide (HW) Cutting Head - harder and more wear-resistant than standard high-speed steel, maintaining a sharp edge through repeated hinge cup boring in hardwood, chipboard, MDF, and plywood without premature dulling.
- PTFE-Coated Spiral Portion - the orange or black PTFE coating prevents pitch and glue adhesion on the spiral flutes, reducing chip packing and friction so the bit runs cooler and lasts longer between cleanings.
- Precision-Balanced Centre Point - the HW centre point self-centers on the marked hole location, eliminating walk-off at the start of the cut and producing accurately placed hinge cup holes every time.
- 2 Precision-Ground Cutting Edges with Negatively Ground Spurs (Z2) - the negatively set spurs score the perimeter cleanly before the main edges remove material, producing flat-bottom holes with crisp, tear-free walls that seat European concealed hinges flush without additional cleanup.
- 2 Spiral Flutes - effectively evacuate chips and sawdust from the bore during drilling, reducing heat buildup and helping maintain hole quality in blind flat-bottom drilling applications.
- 16mm Diameter, 70mm Total Length - the long-series 70mm body provides the reach needed for thicker cabinet components and panel stacks where a standard-length bit cannot achieve full depth.
- 10 x 26mm Parallel Shank with Driving Flat and Length Adjusting Screw - the parallel shank with driving flat locks securely in boring machine chucks or adapters, and the length adjusting screw allows precise depth setting so every hinge cup is bored to a consistent depth across a full production run.
- Right-Hand (RH) Rotation - matches the standard spindle direction of CNC boring centers, multi-spindle boring machines, drill presses, and handheld drills, requiring no special setup or reverse-spindle tooling.
Why This Product
- The long 70mm body makes this bit the right choice when boring hinge cup holes in thicker cabinet panels or components where a shorter bit would bottom out in the chuck before reaching full cutting depth.
- The combination of a carbide HW head and PTFE-coated spiral addresses two of the most common problems in production hinge boring - edge wear and chip packing - helping maintain consistent hole quality across high-volume runs.
- Negatively ground spurs produce the clean, flat-bottom bores that European concealed hinges demand for a proper seat, reducing the chance of a poorly fitting hinge cup that causes door alignment problems.
- The 10 x 26mm parallel shank with a driving flat and length adjusting screw gives operators secure tool engagement and repeatable depth control without the guesswork of manual depth stops, making this bit well-suited for multi-spindle CNC boring machines and boring centers used in cabinet production.
Specifications
- Manufacturer Part Number: 369.160.11
- Brand: CMT Orange Tools
- Product Type: Hinge Boring Bit
- Diameter: 16mm
- Total Length: 70mm
- Shank: 10 x 26mm
- Rotation: Right-Hand (RH)
- Number of Spurs: 2
- Number of Teeth: 2
- Tooth Geometry: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
Approved Applications
- Drilling flat-bottom hinge cup holes for European concealed hinge installation
- Cabinet door hinge mounting in production and custom shop environments
- Boring hinge cup pockets in solid hardwood cabinet components
- Hinge cup boring in softwood, chipboard, MDF, and plywood panels
- Multi-spindle CNC boring machine operations requiring long-series bits
- CNC boring center and panel processing center tooling
- Boring machine setups using an adapter or chuck
- Drill press hinge cup boring with parallel shank tooling
Frequently Asked Questions
What is the difference between this 70mm bit and a standard-length hinge boring bit?
The 70mm total length is a long-series dimension designed for boring hinge cup holes in thicker cabinet components or panel stacks. A standard-length bit may not provide enough reach to achieve full cutting depth in thicker workpieces, whereas this long-series bit gives the additional clearance needed between the chuck face and the workpiece surface.
What does the PTFE coating on the spiral portion do?
The PTFE coating on the spiral flutes prevents pitch and glue from adhering to the bit body during cutting. This reduces chip packing, lowers friction, and helps the bit run cooler - all of which contribute to longer tool life and more consistent hole quality, particularly when boring in glued or resin-rich materials like chipboard and MDF.
How does the parallel shank with a driving flat and length adjusting screw work?
The 10 x 26mm parallel shank is designed to seat in a boring machine chuck or adapter. The driving flat provides a positive engagement surface that prevents the bit from rotating in the chuck under load. The length adjusting screw allows the operator to set and lock the bit at a precise projection length, which directly controls hinge cup bore depth - ensuring every hole across a production run is bored to the same consistent depth.
Is this bit compatible with handheld drills as well as machine boring applications?
Yes. The parallel shank design is compatible with multi-spindle CNC boring machines, CNC boring centers, panel processing centers, boring machines with an adapter or chuck, drill presses, and handheld drills. The right-hand (RH) rotation matches the standard forward direction of all these machine types with no special setup required.
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