Hager BB1173 4-1/2" Ball Bearing Half Surface Hinge – US26D
The Hager BB1173 is a specialized half surface hinge designed for both efficiency and durability in commercial applications. This hinge is the ideal solution for regular-weight hollow metal or wood composite doors mounted in hollow metal frames. Finished in US26D Satin Chrome, it provides a sleek, professional look while offering a practical mounting solution for doors requiring low-frequency service.
Specialized Half Surface Mounting
The BB1173 features a unique installation profile: the jamb leaf is mortised into the frame, while the door leaf is surface mounted to the face of the door. This makes it an excellent choice for retrofit projects where the door edge may not be suitable for a traditional full mortise hinge. The beveled surface leaf ensures a clean, flush aesthetic on the door face, and the reversible design allows for easy installation on both left-hand and right-hand door swings.
Engineered for Longevity
Equipped with two ball bearings, this 5-knuckle hinge ensures a smooth, quiet swing, significantly reducing friction and wear over the life of the opening. It is specifically designed for 1-3/4" thick doors and utilizes high-strength steel construction. For wood door applications, the included thru-bolts and grommets provide a secure, heavy-duty attachment that prevents the hardware from pulling away from the door core.
Technical Specifications
| Feature | Specification |
| Model Number | Hager BB1173 |
| Hinge Size | 4-1/2" (114mm) |
| Hinge Type | Half Surface - 5 Knuckle - Ball Bearing |
| Mounting Style | Surface (Door Face) / Mortised (Frame Jamb) |
| Finish | US26D (Satin Chrome Plated) |
| Material | Steel with Steel Pin |
| Gauge (Thickness) | 0.134" |
| Bearing Count | Two Ball Bearings |
| Standards | ANSI A8412 Compliant |
| Pin Style | Non-rising removable pin with button tip and plug |
Installation and Hardware
The Hager BB1173 is furnished with specialized fasteners to ensure a permanent and professional mount:
- Door Leaf: 2" x 1/4-20 OH Machine Screws & grommet nuts (thru-bolts)
- Jamb Leaf: 1/2" 12-24 FPHM (Flat Head Machine Screws)
Custom Options Available
While US26D is the stock standard, other variations are available via quote:
- Alternative Finishes: USP (Prime for Paint), US10 (Satin Bronze), US10A (Antique Bronze), and US10B (Oil Rubbed Bronze).
| General - US Finishes | US26D - Satin Chrome |
| Brand | Hager |
| Hinge Height | 4.5" Hi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Type | Half Surface |
| Hinge Options | Ball Bearing |
| Base Material | Steel |
| Hinge Corners | Square |
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