Deltana DSB4B3-UNL Square Hinge Ball Bearing 4x4 Brass

Product Description

The DELTANA DSB4B3-UNL is a 4-inch by 4-inch square door hinge with ball bearings, finished in unlacquered bright brass. It is a full-mortise architectural hinge designed for interior and exterior door installations where a clean, square-corner profile is required. The ball bearing construction reduces pivot friction and supports consistent, smooth door operation over high-cycle use. The unlacquered bright brass finish delivers a natural brass appearance that will develop a patina over time. This hinge is sold as a pair and is specified and installed by finish carpenters, door and frame contractors, and general contractors working on commercial and residential projects.

This hinge suits standard wood door and frame applications in residential and light commercial construction. The 4-inch leaf size is appropriate for doors up to standard interior and light-duty exterior weight ranges. The unlacquered finish makes it a fit for projects where a living brass look is specified or where the owner intends to apply a custom finish or lacquer on site. It is commonly used on entry doors, passage doors, and closet doors where architectural hardware quality is a project requirement.

Key Features

• Ball bearing pivot for smooth, low-friction door swing and extended service life
• 4 inches x 4 inches square corner leaf geometry for a clean architectural profile
• Unlacquered bright brass finish allows natural patina development or field-applied topcoat
• Solid brass construction for corrosion resistance and dimensional stability
• Sold as a pair for standard single-door hinge sets

Compatibility

Designed as an OEM-style architectural replacement or new-installation hinge for standard full-mortise door and frame applications requiring a 4-inch square hinge with ball bearings.

Installation Notes

Installation is performed by carpenters or door hardware contractors using standard mortise chisels and a drill with appropriate bit sizes for pilot holes and screw pockets. Power down any electric strike or access control hardware integrated into the door frame before beginning hinge work. Fasteners should be set flush without over-driving to avoid stripping the mortise pocket or deforming the leaf. Verify door weight and frequency of use against the hinge load rating before finalizing hinge count per door.