Pemko DFM83HD1 Continuous Geared Hinge - Full Mortise Heavy Duty
The Pemko DFM83HD1 is a high-performance Full Mortise Continuous Geared Hinge specifically engineered for new door installations in high-traffic environments. Finished in a sophisticated Dark Bronze Anodized Aluminum, this Heavy Duty hinge supports doors up to 540 lbs by distributing weight uniformly along the entire length of the frame. This eliminates the "sagging" common with traditional butt hinges, ensuring your door stays perfectly aligned for the life of the building.
High-Performance & Security Features
- Uniform Load Distribution: Unlike standard hinges that rely on three pivot points, this continuous hinge reinforces the full height of the opening, preventing frame deformation and door misalignment.
- Superior Durability: The geared mechanism provides 50% more bearing surface than traditional hinges, drastically reducing wear and making it ideal for schools, hospitals, and high-use public facilities.
- Concealed Leaf Design: As a full mortise unit, both hinge leaves are completely concealed when the door is closed, offering a clean, "hardware-free" look and enhanced protection against tampering.
- Hassle-Free Installation: Furnished with No. 12-24 x 7/16" thread-forming screws, allowing for rapid installation into metal frames without the need for manual tapping.
- Safety & Accessibility: Precision engineering ensures a low operating force (1/2 lb or less), meeting ADA accessibility requirements while also eliminating pinch points at the hinge gap.
Technical Specifications
- Manufacturer: Pemko (ASSA ABLOY)
- Model Number: DFM83HD1
- Length: 83" (Designed for standard 7'0" door heights)
- Weight Capacity: Heavy Duty (HD) — supports up to 540 lbs
- Finish: Dark Bronze Anodized Aluminum (D)
- Mounting: Full Mortise (Leaves are mortised into the door and frame)
- Certifications: UL 10C Positive Pressure Fire Rated, ANSI/BHMA A156.26 Grade 1.
Pro-Tip for Architects & Contractors
The Pemko DFM83HD1 is the "gold standard" for new construction projects. Because it is a full mortise hinge, the door must be undersized to accommodate the hinge thickness (typically a 35-1/2" to 35-9/16" door for a standard 36" opening). For fire-rated assemblies requiring a 3-hour rating, these hinges can be equipped with FirePins. The dark bronze finish is post-machining anodized, ensuring the gear teeth are just as hard and corrosion-resistant as the visible faces.
| Brand | Pemko |
| Length | 83 Inch |
| Hinge Type | Full Mortise, Continuous Hinge |
| Continuous Hinge Height | 83 Inch (7/0 Dr) |
| Continuous Hinge Grade | Heavy Duty |
| General - US Finishes | 313 - Dark Bronze Anodized |
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