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CE Certified A55HLH Sliding Door Lock - Durable & Secure for Fire Doors from China Suppliers and Factory
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CE Certified A55HLH Sliding Door Lock - Durable & Secure for Fire Doors from China Suppliers and Factory

Discover our high-quality sliding doors, specifically designed for external fire and smoke protection. Our products are crafted from durable stainless steel materials, available in both 201 and 304 grades. As a leading China supplier and factory, we ensure that our sliding doors meet stringent safety standards while providing exceptional durability and style. Choose our stainless steel sliding doors for reliable performance and peace of mind in any environment
  • Model No. A55HLH
  • Color Black, Satin Chrome,gun Black , Satin brass , Satin Nickle , or custom color(as your color sample)
  • Product Positioning Mid-to-high-end hardware
  • Certification ISO9001
  • Customization OEM & ODM acceptable
  • Strength 20 Years of Manufacturing Experience

Advantage
🔄
200,000 Times Cycling Test
🛡️
96H Salt Spray Test
100% Good Performance
📜
Patent
Key Specifications
Features For wooden door and flush doors, Ecological Gate, Cupboard, Wardrobe. Easy to install and adjust with 3D adjustable: Vertical ±2.5mm, Horizontal ±2mm, Depth ±1mm
Opening Angle 180°
TECHNICAL DATA
Max. Door Weight (with 2 hinges) 80 KG
Min. Door Thickness 38 mm
Max. Door Width 900 mm
Cutter Diameter 28 mm
Cutting Length 160 & 116 mm
Cutting Depth 10 & 25.5 mm
Material Zinc Alloy
Technical Profile

In the world of architectural hardware and precision joinery, the hinge is the unsung hero that defines functionality, durability, and aesthetic integrity. The 3D Adjustable Hidden Door Hinge represents a breakthrough in engineering, specifically designed to meet the most demanding requirements of contemporary flush wooden doors. This product combines a revolutionary 180-degree opening angle with an 80kg heavy-duty load capacity, advanced three-dimensional adjustability, and an easy-install design, all constructed from premium zinc alloy. It is the definitive hardware solution for professionals and homeowners who will not compromise on performance, convenience, or sleek modern design.

⚙️ Engineered for Unmatched Strength: 80kg Heavy-Duty Performance

At the heart of this hinge lies its exceptional load-bearing capability. Engineered to support up to 80 kilograms, this hinge redefines the concept of heavy-duty for residential and commercial applications. The core mechanism utilizes a high-grade zinc alloy arm and housing, chosen for its superior structural integrity, remarkable corrosion resistance, and long-term dimensional stability. This robust construction ensures the hinge can withstand the weight of solid wood doors, thick panels, and frequent daily use without sagging, warping, or failure. Reinforced with hardened steel pivot pins and smooth-operating bearings, it guarantees a consistently silent, fluid, and reliable swing cycle for the lifetime of the installation. Whether for large cabinet doors, heavy entryway units, or commercial fixtures, this hinge delivers unwavering strength and peace of mind.

🚪 Maximum Accessibility & Seamless Aesthetics: The 180-Degree Full-Clearance Design

This hinge transforms user interaction with storage spaces through its 180-degree full-opening capability. Doors can swing completely open, resting flush against adjacent surfaces, thereby providing total, unobstructed access to the cabinet or wardrobe interior. This design eliminates awkward angles and blind corners, making it ideal for pantries, corner cabinets, appliance garages, and any space where maximizing usability is paramount. Despite this expansive range of motion, the hinge remains entirely concealed (hidden) when the door is closed. This preserves the clean, minimalist lines of flush-mounted doors, allowing the beauty of the wood grain or lacquered finish to shine without visual interruption from hardware, maintaining a sleek and modern aesthetic.

🎯 Advanced 3D Adjustability for Flawless Alignment

Achieving a perfectly aligned, professional-grade installation is made effortless with the integrated 3D micro-adjustment system. This feature allows for precise, tool-based fine-tuning in all three spatial planes after the hinge is mounted, correcting minor imperfections in the cabinet carcase or door. The system enables:

  • Depth Adjustment (In/Out): To set the exact position of the door, ensuring a perfectly flush surface or a desired reveal.
  • Vertical Adjustment (Up/Down): To level the door precisely, creating even horizontal gaps along the top and bottom.
  • Lateral Adjustment (Side-to-Side): To fine-tune the gaps between adjacent doors, ensuring consistent, hairline margins.

This adjustability is not just a convenience — it is a critical tool that saves significant installation time, compensates for material movement, and guarantees a flawless, gap-free finish that is the hallmark of quality craftsmanship.

🔧 Streamlined Simplicity: The Easy-Install Advantage

Recognizing the value of time and efficiency, this hinge system is designed with an easy-install philosophy. It features clear mounting templates, intuitive components, and a straightforward process that simplifies installation for both seasoned professionals and capable DIY enthusiasts. The design minimizes complex steps without sacrificing the robust features, allowing for a quicker, more confident setup that gets the job done right the first time.

Conclusion

The Superior Choice for Demanding Applications

The 3D Adjustable Hidden Door Hinge is more than a simple fitting; it is a comprehensive performance system. It successfully merges extreme 80kg load-bearing capacity with the ultimate accessibility of a 180-degree opening, the surgical precision of 3D adjustability, and the practicality of easy installation — all housed within a durable zinc alloy body. For those seeking a reliable, high-performance, and aesthetically discreet hinge for heavy wooden flush doors, this product stands as the intelligent and uncompromising choice. It ensures that every door operates with smooth, silent authority and maintains flawless alignment for years to come, fully embodying the union of robust strength and refined modern design.

Frequently Asked Questions
Q What is the maximum door weight supported by this 3D adjustable hidden door hinge?
This hinge supports a maximum door weight of 80 kg when using 2 hinges, making it suitable for heavy solid wood doors, thick flush panels, and demanding commercial applications.
Q What types of doors is this concealed hinge compatible with?
The hinge is designed for wooden doors, flush doors, ecological gates, cupboards, and wardrobes. It requires a minimum door thickness of 38mm and supports doors up to 900mm in width.
Q How does the 3D adjustment system work, and what are the adjustment ranges?
The 3D micro-adjustment system allows fine-tuning in three directions after installation: Vertical ±2.5mm (up/down), Horizontal ±2mm (side-to-side), and Depth ±1mm (in/out). This ensures perfectly aligned, gap-free door fitting without reinstallation.
Q What material is the hinge made from, and how durable is it?
The hinge is manufactured from high-grade zinc alloy, offering superior structural integrity, corrosion resistance, and dimensional stability. It has passed a rigorous 200,000-cycle test and a 96-hour salt spray test, confirming its long-term durability and 100% performance reliability.
Q Does the hinge remain visible when the door is closed?
No. This is a fully concealed (hidden) hinge. When the door is closed, the hinge mechanism is completely hidden within the door and frame, preserving the clean, minimalist aesthetic of flush-mounted doors with no visible hardware.
Q What cutter specifications are required for installation?
Installation requires a cutter with a 28mm diameter. The cutting lengths are 160mm and 116mm, with cutting depths of 10mm and 25.5mm. The product includes clear mounting templates to simplify the process for both professionals and DIY users.
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