Concealed Door Hinges for Invisible Door

The Stainless Steel Hidden Hinges are designed as a versatile and durable concealed hinging solution for contemporary architectural doors where both aesthetics and functionality are essential. Manufactured entirely from stainless steel, they offer excellent strength, corrosion resistance, and long-term reliability, making them suitable for frequent use. The 180-degree opening angle allows full door access and improved space efficiency, while the non-handed design simplifies specification and installation by accommodating both left- and right-hand doors without modification. Completely concealed when the door is closed, these hinges are ideal for interior and exterior wooden or metal doors in residential and commercial settings, including offices, apartments, hotels, and modern living spaces that require a clean appearance combined with smooth, dependable door movement.

Technical Specifications

Product Images and Videos

Product Features & Advantages

• Fully Concealed Design: This hinge is completely hidden within the door leaf and frame when the door is closed, eliminating all visible hardware. By removing exposed knuckles and plates, it preserves uninterrupted sightlines and delivers a clean, minimalist aesthetic that aligns with modern architectural trends. This design is especially valued in luxury hotels, high-end residences, and contemporary commercial interiors, where visual cohesion and material continuity are critical to the overall design concept.
• SUS304 Stainless Steel Durability: Manufactured entirely from SUS304 stainless steel, the hinge offers exceptional resistance to corrosion, deformation, and surface wear. Compared to conventional zinc-alloy alternatives, SUS304 delivers up to 8× longer service life, particularly in environments exposed to humidity, frequent cleaning, or temperature fluctuations. This makes the hinge highly suitable for bathrooms, coastal villas, hospitality projects, and high-traffic commercial spaces, significantly reducing long-term maintenance and replacement costs.
• 180° Opening Angle: The hinge supports a full 180-degree opening, allowing doors to open flat against adjacent walls. This maximizes usable space in compact layouts such as apartment kitchens, office meeting rooms, and hotel corridors, and improves accessibility by facilitating the movement of large objects, including hospital beds, carts, and equipment. The wide opening angle enhances both functional efficiency and user comfort in demanding environments.
• Non-Handed Universal Fit: Designed as a non-handed hinge, it is compatible with both left-hand and right-hand opening doors. This universality simplifies inventory management for distributors and contractors, reduces on-site installation errors, and improves installation speed. For large projects with multiple door orientations, this feature significantly streamlines logistics and lowers overall project complexity.
• Timber & Metal Door Compatibility: Available in multiple size variants, the hinge supports a wide range of door materials and weights—from lightweight timber bathroom doors to heavy metal or reinforced villa entry doors. This versatility allows the same hinge family to be specified across mixed-use projects, simplifying procurement and ensuring consistent performance standards throughout the building.

Application Scenarios

• Hotel Guest Room Doors: In hotel guest rooms, visual refinement and quiet operation are essential to the guest experience. The fully concealed design ensures no visible hardware interrupts the interior aesthetic, while the SUS304 stainless steel construction withstands frequent use and daily housekeeping routines. This scenario clearly demonstrates why a concealed, corrosion-resistant hinge is suitable for hospitality environments where design consistency, durability, and low maintenance are critical purchasing factors.
• Villa Main Entrance Doors: Luxury villas often feature heavy, custom-designed entrance doors that serve as architectural focal points. The hinge’s full stainless steel construction and compatibility with heavy door weights provide the structural reliability required for these applications, while the hidden installation preserves the clean appearance of bespoke entryways. This use case helps buyers determine that the hinge is appropriate for high-end residential projects demanding both strength and visual discretion.
• Office Meeting Room Doors: Modern office meeting rooms prioritize flexible layouts, clean lines, and efficient space utilization. The 180° opening angle allows doors to open fully without obstructing circulation paths, while the non-handed design simplifies installation across multiple rooms. Facility managers can easily assess that this hinge supports frequent use, minimizes maintenance, and aligns with contemporary office design standards.

Certifications and Compliance

• CE & UL Certification: The hinge complies with EN 1935 and ANSI/BHMA A156.13, supporting specification in international projects across Europe and North America.
• ISO 9001:2015: Manufactured under a certified quality management system to ensure consistent materials, controlled processes, and reliable finished products.
• ASTM Compliance: SUS304 stainless steel meets ASTM A240 requirements for corrosion resistance, while casting components comply with ASTM B86 for structural strength.
• SGS Audited: Produced in an audited facility with a monthly capacity of 200,000 units, ensuring traceability, ethical production, and stable supply.

Customization Options

• Material Upgrades: Optional SUS316 stainless steel is available for enhanced corrosion resistance in coastal or high-humidity environments, along with antimicrobial coatings for healthcare facilities.
• Finish Customization: A wide selection of RAL and Pantone-matched PVD finishes is available, including dual-tone options to suit traditional or mixed interior styles.
• Size & Load Enhancements: Custom dimensions can be produced to support doors weighing up to 150 kg, with optional integrated spring mechanisms for self-closing applications, including compatibility with panic exit systems.
• OEM/ODM Services: Support includes private-label branding, multilingual installation guides, and bundled hardware solutions combining hinges, door handles, and locks.

Production Process & Quality Control

1. Material Sourcing & Casting: SUS304 raw materials are verified by XRF testing before precision casting, with dimensional tolerances controlled within ±0.05 mm.
2. Connecting Strip Machining: Connecting strips are laser-cut and polished to ensure smooth 180° movement and long-term corrosion resistance.
3. Assembly & Calibration: Robotic assembly ensures consistent alignment, and each hinge is individually calibrated to achieve friction-free operation.
4. Surface Finishing: Finishes include multi-stage polishing (SSS or PSS) or vacuum PVD coating with a thickness of 2–3 μm, enhancing scratch resistance and surface durability.
5. Performance Testing and Inspection: Each hinge undergoes 100% load testing (e.g., 120 kg for 34 × 140 mm models) and 500,000-cycle durability testing, followed by a full visual and dimensional inspection before packaging.