Product Description
The CMT 392.200.11 Hinge Boring Bit is a 20mm carbide-tipped parallel shank boring bit engineered for drilling clean, flat-bottom hinge cup holes required for European-style concealed hinge installation. Built on a super-strength steel body with a right-hand (RH) rotation and precision-ground tungsten carbide (HW) cutting edges, this bit delivers consistent, repeatable results when boring hinge cup recesses in cabinet doors, face frames, and furniture panels. The 5/16" (8mm) parallel shank makes it compatible with a wide range of drilling equipment including drill presses, handheld drills with a chuck, and boring machines fitted with an appropriate adapter.
Key Features
- Super-strength steel body with HW (tungsten carbide) construction - the hardwearing carbide material resists wear and heat buildup during repetitive boring cycles, extending tool life in production and shop environments alike.
- Precision-balanced centre point - self-centers on contact so each hinge cup hole starts exactly where intended, reducing the risk of blowout or misaligned hinge placement.
- 2 HW precision-ground cutting edges (Z2) - dual carbide-tipped cutting edges produce a smooth, flat-bottom bore with minimal tearout, which is critical for proper concealed hinge seating.
- 2 HW negatively ground spurs (V2) - the negatively ground spurs score the perimeter of the hole cleanly before material is removed, delivering sharp, chip-free bore walls on hardwood, softwood, chipboard, MDF, and plywood.
- 8mm parallel (straight) shank - the parallel shank design is universally compatible with standard drill chucks and adapter systems, giving this bit broad machine compatibility without the need for specialized toolholders.
- Right-hand (RH) rotation - matches the standard rotation direction of conventional drill presses and handheld drills so no machine reconfiguration is needed.
- 20mm cutting diameter x 60mm total length - the 20mm diameter matches the industry-standard hinge cup size used in European concealed hinge installation, while the 60mm overall length provides adequate reach in most drilling setups.
Why This Product
- The 20mm diameter is the industry-standard size for European concealed hinge cup holes, meaning this bit installs directly into your workflow for cabinet door hinge mounting without any sizing conversion or workaround.
- With 2 negatively ground carbide spurs and 2 precision-ground carbide cutting edges working together, the bit produces clean bore walls and a flat bottom in a single pass - reducing sanding, rework, and material waste.
- The 8mm parallel shank fits standard drill chucks found on drill presses, handheld drills, and boring machines with an adapter, making this a versatile choice across multiple machine types in a shop setting.
- HW (tungsten carbide) construction on all cutting geometry means the bit holds its edge through high-volume boring runs in demanding materials such as chipboard, MDF, hardwood, and plywood - reducing downtime from frequent tool changes.
Specifications
- Manufacturer Part Number: 392.200.11
- Brand: CMT Orange Tools
- Diameter: 20mm
- Total Length: 60mm
- Shank: 8mm (5/16") parallel
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Rotation: Right-hand (RH)
- Blade Material: HW (tungsten carbide)
- Product Type: Hinge Boring Bit - Parallel Shank
Approved Applications
- Drilling flat-bottom hinge cup holes for European concealed hinges
- Cabinet door hinge cup boring
- Concealed hinge installation in furniture panels
- Use in drill presses with standard chuck
- Use in handheld drills with parallel shank chuck
- Use in boring machines with appropriate adapter
- Boring in solid hardwood
- Boring in softwood
- Boring in chipboard
- Boring in MDF
- Boring in plywood
Frequently Asked Questions
What shank size and style does the CMT 392.200.11 use?
This bit uses an 8mm (5/16") parallel (straight) shank. The parallel shank design fits standard drill chucks on drill presses, handheld drills, and boring machines equipped with an adapter or chuck - no specialized toolholder is required.
What diameter hinge cup hole does this bit produce, and which hinges does it fit?
The bit bores a 20mm diameter hole, which is the industry-standard cup size for European-style concealed hinges used in cabinet door and furniture panel applications. If your concealed hinges specify a 20mm cup hole, this bit is the correct size.
What is the cutting geometry of this boring bit?
The CMT 392.200.11 features a precision-balanced HW (tungsten carbide) centre point, 2 precision-ground HW cutting edges (Z2), and 2 negatively ground HW spurs (V2). The negatively ground spurs score the perimeter cleanly before the cutting edges remove material, resulting in sharp, chip-free bore walls and a flat bottom.
In which direction does this bit rotate, and what is its total length?
The bit rotates right-hand (RH), matching the standard rotation of conventional drill presses and handheld drills. Its total length is 60mm, which provides adequate reach for hinge cup boring in standard cabinet and furniture door panel thicknesses.
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