This extended-length load-bearing hinge is specifically engineered for extra-large, heavy-duty casement windows. Precision-stamped from 3.0mm-thick 304 stainless steel, the 18-inch arm features 22-slot compatibility with standard door and window profiles. The four-link linkage structure delivers robust load-bearing capacity, wide opening range, and exceptional corrosion resistance, making it the ideal core hardware component for oversized thermal break aluminum floor-to-ceiling windows and heavy-duty outward-opening windows.

Manufactured from a single piece of SUS304 stainless steel sheet with 3.0mm thickness, this hinge provides exceptional structural rigidity and load-bearing capacity. It maintains resistance to bending and deformation under heavy window sash weights and strong wind loads, delivering superior wind and pressure resistance performance.

• 304 stainless steel offers excellent corrosion and rust resistance
• Verified through 500-hour salt spray testing for harsh environments
• Precision-riveted hinge points with solid rivets for tight fit and smooth operation
• Complies with QB/T 5338-2018 General Technical Standard for Door and Window Hardware
• Passed 100,000-cycle durability testing for repeated opening and closing

The 18-inch (approximately 457mm) extra-long arm design combined with a four-bar linkage transmission mechanism enables wide maximum opening angles for superior ventilation. The opening and closing process distributes force evenly, ensuring smooth and stable operation without jamming, wobbling, or shaking.

• Stable triangular mechanical support when open
• Firmly locks sash at desired opening angle
• Withstands strong wind impacts and prevents sash swaying
• Wear-resistant guide and stop components for uniform sliding resistance
• Reliable end stops enhance smoothness for extra-large window sashes

Compatible with 22mm-wide standard door and window profile grooves, this universal specification fits oversized thermal-break aluminum casement windows, heavy-duty exterior casement windows, and top-hung windows. Industry-standard mounting holes allow for precise alignment and quick assembly using standard screws, eliminating the need for additional profile cutting or grooving.

• Oversized outward-opening windows
• Heavy-duty thermal-break aluminum floor-to-ceiling windows
• Large-format balcony casement windows
• Heavy-duty top-hung windows for sunrooms
• Residential large-window hardware systems
• High-end finishing projects in real estate developments
• Load-bearing performance upgrades for older windows and doors
• Bulk export supply of window and door hardware