NHN KCH 4055 3D Concealed Door Hinge

NHN KCH 4055 3D Concealed Door Hinge

The NHN KCH 4055 is a fully concealed, three-dimensionally adjustable door hinge designed for modern architectural doors. The hinge is installed inside the door leaf and frame, keeping the hardware hidden when the door is closed and preserving a clean, minimalist appearance.

Key technical specifications

• Model: KCH 4055
• Maximum door weight: 55 kg
• Maximum door width: 1000 mm
• Vertical adjustment: ±2 mm
• Horizontal adjustment: -2 mm / +3 mm
• Depth adjustment: ±1 mm
• Opening angle: up to 180°
• Handing: non-handed; suitable for left- and right-handed doors
• Installation: concealed inside the door and frame
• Materials: special zinc-alloy body with high-quality circular bearings and O-rings
• Lubrication: bearings and O-rings are designed not to require lubrication
• Durability: tested through 200,000 opening and closing cycles
• Corrosion resistance: 48-hour test reference to EN 1670
• Standards: EN 1935 / EN 1670 references from the manufacturer
• Finishes: Black and Silver; other finishes available by special order

Precise 3D adjustment

The KCH 4055 allows the door position to be fine-tuned in three directions after installation: vertical, horizontal and depth. This adjustment capability helps installers achieve accurate door alignment and maintain smooth operation.

Fully concealed architectural design

The hinge is installed within the door and frame, so it remains hidden when the door is closed. This makes the KCH 4055 suitable for modern interiors and architectural projects where visible hinges would detract from the design.

Durability and construction

NHN specifies a special zinc-alloy body together with high-quality circular bearings and O-rings that do not require lubrication. The KCH 4055 has been tested for 200,000 opening and closing cycles, while the manufacturer references EN 1670 for its 48-hour corrosion test.

Applications

The KCH 4055 is suitable for wooden, steel and aluminium doors and can be used for both left- and right-handed door applications. The manufacturer positions the KCH series for modern residential and commercial architecture.

SEO article – NHN KCH 4055 concealed hinge

The NHN KCH 4055 concealed door hinge is a professional 3D-adjustable hinge designed for modern wooden, steel and aluminium doors. Its fully concealed installation keeps the hinge hidden inside the door and frame, creating a clean architectural appearance while providing precise adjustment and dependable long-term performance.

With a maximum door capacity of 55 kg and a maximum recommended door width of 1000 mm, the KCH 4055 is designed for a range of modern residential and commercial door applications. Its three-dimensional adjustment allows vertical adjustment of ±2 mm, horizontal adjustment from -2 mm to +3 mm, and depth adjustment of ±1 mm.

The KCH 4055 concealed hinge supports door opening up to 180 degrees and uses a non-handed design, allowing the same hinge configuration to be used for left- and right-handed doors. Its zinc-alloy body incorporates high-quality circular bearings and O-rings that do not require lubrication.

For projects where concealed door hardware, precise alignment and durability are important, the NHN KCH 4055 provides a discreet hinge solution with manufacturer-stated testing to 200,000 opening and closing cycles and a 48-hour corrosion-test reference to EN 1670.