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Don-Jo BB84545 Ball Bearing Hinge | 4-1/2" x 4-1/2" | 626 Satin Chrome (US26D)
The Don-Jo BB84545 is a ball bearing hinge sized 4-1/2" x 4-1/2" and built from brass at a 0.134 gauge leaf thickness, finished in 626 Satin Chrome (US26D). Manufactured to ANSI A2112 template dimensions, this full mortise butt hinge is rated for medium weight doors, making it a dependable choice for commercial interior openings, office suites, school corridors, and light institutional applications where a smooth, low-friction swing is required. Its non-handed design installs on any handing without modification, and the ANSI template layout allows direct interchangeability with most standard door and frame preps.
Ball Bearing Construction for Smooth, Long-Cycle Operation
The BB84545 incorporates ball bearings at the knuckle to reduce pivot friction and extend service life on frequently cycled doors.
- Ball bearing pivot: Reduces wear at the knuckle on medium weight commercial doors, maintaining consistent swing resistance over thousands of open-close cycles.
- Brass material: Solid brass construction resists corrosion and delivers the dimensional stability expected on specification-grade commercial hardware.
ANSI A2112 Template — Direct Drop-In Replacement
The ANSI A2112 template pattern means the BB84545 aligns with industry-standard door and frame mortise preps without additional machining.
- ANSI template compliance: Screw holes and leaf geometry follow the ANSI A2112 standard, making this hinge a fit-compatible cross-reference for McKinney and Hager ball bearing hinges cut to the same template.
- Non-handed: A single SKU covers left-hand and right-hand openings, simplifying procurement and reducing jobsite inventory.
626 Satin Chrome Finish — Specification-Ready Appearance
The 626 Satin Chrome (US26D) finish delivers a low-sheen, brushed appearance that coordinates with the most widely specified commercial hardware finishes.
- 626 / US26D designation: Matches satin chrome finish callouts on architectural hardware schedules, ensuring a consistent look across locksets, closers, and exit devices on the same opening.
- 0.134 gauge brass leaf: The 0.134" leaf thickness provides the structural integrity appropriate for medium weight door applications in commercial construction.
Technical Details
| Manufacturer | Don-Jo Manufacturing |
| Model Number | BB84545 |
| Product Type | Ball Bearing Hinge (Full Mortise Butt Hinge) |
| Size | 4-1/2" x 4-1/2" |
| Gauge | 0.134" |
| Material | Brass |
| ANSI Template | A2112 |
| Application | Medium Weight Doors |
| Handing | Non-Handed |
| Finish | 626 Satin Chrome (US26D) |
| Non-Removable Pin Option | Available — specify NRP as a prefix (e.g., NRPBB84545-626); priced adder |
| Shelf Pack | 24 per case |
| Availability | Non-stock; ships from Don-Jo — estimated lead time 3–10 business days |
To order with a non-removable pin, prefix the model number with NRP (example: NRPBB84545-626) and note the adder at time of order. Standard pin version ships as BB84545-626. Contact us to confirm lead time before placing time-sensitive orders.
| Hinge Options | NRP (Non Removable Pin) or Ball Bearing |
| Brand | Don-Jo |
| General - US Finishes | US26D - Satin Chrome |
| Hinge Type | Full Mortise |
| Hinge Mounting | Full Mortise |
| Hinge Height | 4.5" Hi |
| Hinge Width | 4.5" Wi |
| Hinge Grade/Thickness | Standard Wt .119 to .146 |
| Hinge Knuckle | 5 Knuckles |
| Base Material | Brass |
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