Heavy‑weight 2‑ball‑bearing door hinge with UL listed and ANSI marks for 3‑hour fire‑rated doors
Technical drawing and size chart for 4.5×4 and 4.5×4.5 inch heavy‑weight 2BB hinges, 4.6 mm thick, with optional NRP
Feature summary for heavy‑weight Grade 1 hinge showing 2 bearings, non‑rising pins, UL10C 3‑hour rating, and included screws

Heavy‑Weight Ball‑Bearing Door Hinge | 2BB | UL10C 3‑Hour Fire Rated | ANSI/BHMA Grade 1 | NRP Optional

  • Heavy‑weight leaves, approx. 4.6 mm thickness
  • 2 ball bearings for low‑friction swing and long service life
  • Non‑rising pins with button tip and plug; optional NRP for added security
  • ANSI/BHMA A156.1 Grade 1; life tested up to 2,500,000 cycles
  • UL10C fire‑rated up to 3 hours for fire/smoke control doors
  • Square‑corner heavy‑weight template; non‑handed; machine/wood screws included
  • Materials/finishes: stainless steel or steel with multiple finish options
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Description

Built for demanding commercial openings, this heavy‑weight 2‑ball‑bearing hinge delivers smooth, durable performance on high‑traffic and fire‑rated doors. The square‑corner heavy‑weight template pattern speeds installation on standard preps, while non‑rising pins maintain alignment over millions of cycles. An optional Non‑Removable Pin (NRP) enhances security by preventing pin extraction from the secure side—ideal for schools, hospitals, hospitality, and corridor fire doors. Available in stainless steel or steel and common sizes 4.5″×4″ and 4.5″×4.5″, it meets ANSI/BHMA A156.1 Grade 1 life testing up to 2,500,000 cycles and carries a UL10C fire rating up to 3 hours.

Hinge Type Ball Bearing Heavy Weight
Hinge Size (Length X Width) (inch) 4.5″x4″, 4.5″x4.5″
Hinge Thickness 4.6mm
Material Stainless Steel / steel optional
Bearings 2 ball bearing hinges
ANSI/BHMA Standard Meets ANSI/BHMA A156.1 GRADE 1, up to 2,500,000 times cycle test
Usage For heavy weight doors or doors requiring high frequency service, fire and smoke resistance doors
Fire Resistance UL10C, Approved up to 3 hours
Pins All hinges with non-rising pins with button tip and plug
Installed Way Square Corner, Heavy Weight template hinge, non-handed
Non Removable
Pin Type Optional		 Non removable pin (NRP) allows the hinge to not be removed from the outside of the door for increased security
Finishes Available in multiple finishes
Screws Supplied with machine/wood screws

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Akada Hardware specializes in a wide range of high-quality hardware solutions for both wooden and metal doors. Our product line includes stainless steel as well as composite metal products, all designed to provide strength, durability, and modern aesthetics.

Akada’s products include Door Locks, Door Hinges, Lever Handles, Door Closers, Panic Exit Devices, Door Stoppers, Flush Bolts, and more. These products are tested to the most rigorous international standards, including CE, UL, BS EN, ANSI, and BHMA. Whether for residential, commercial, healthcare, hospitality, or educational applications, Akada hardware is engineered for top performance and reliability.

More door hardware items include:
1、Stainless Steel & Composite Metal Door Hinges – UL Listed, Fire Rated & CE Certified
2、Door Locks – CE EN12209, Fire Rated
3、Stainless Steel & Composite Metal Door Handles – BS EN 1906 Certified
4、Panic Exit Device – UL Listed & CE Certified
5、Door Closers – CE BS EN 1154 Certified
6、Glass Hardware / Bathroom Hardware – Combining elegance with functionality for residential and commercial use.

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