BB5254-5" x 4" Full Mortise Heavy Weight Hinge

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BB5254 5 x 4-Inch Heavy-Weight Full-Mortise Hinge

Our BB5254 is a 5 x 4-inch, .190-inch-thick heavy-weight hinge with four ball bearings. Its full-mortise configuration recesses one leaf into the door and the other into the frame. Select it for compatible openings whose hardware schedule calls for heavy-weight ball-bearing support.

Specifications and Order Details

• Model: BB5254.
• Size: 5 x 4 inches.
• Thickness: .190 inch.
• Type: Full mortise, five knuckles, template pattern, four ball bearings.
• Weight class: Heavy weight.
• Current finishes: US26D Satin Chrome, US32D Satin Stainless Steel, US10A, and USP Primed Gray.
• Ordering: Priced and sold individually as each; the catalog inner box contains three hinges. One each does not mean a three-hinge set.

Practical Uses

Consider our BB5254 for heavy-door or higher-frequency commercial applications where the actual door size, weight, reinforcement, and closer forces suit the selected hinge arrangement. For replacement work, compare the exact template with the existing preparation. A 5 x 4-inch size alone does not establish that the thickness or screw pattern will fit.

Everyday example: A facilities technician replacing worn corridor-door hinges measures the existing leaves, checks the .190-inch mortise depth and reinforcement, and compares the BB5254 drawing with the opening. After installation, they test door swing, closer action, and latch alignment together rather than expecting new hinges to repair a damaged frame.

Installation Checks

• Plan the complete arrangement: Confirm door duty, required hinge count and spacing, and closer forces.
• Match the preparation: Check mortise dimensions, thickness, screw positions, reinforcement, and operating clearances.
• Use suitable fasteners: The template references #12-24 x 1/2-inch machine screws and #12 x 1-1/4-inch wood screws. Follow the supplied hardware and approved substrate preparation.
• Align the hinge axes: Seat leaves correctly without forcing misaligned screws or distorting the assembly.
• Test before service: Verify gaps, swing, fastening, closer operation, and latch engagement.

Materials, Pin Security and Rated Openings

Confirm the actual specified material as well as the finish. Our architectural family includes steel, stainless steel, and separately specified brass constructions; a plated finish does not make steel rustproof.

NRP means non-removable pin. A retaining provision prevents pin removal with the door closed. Verify that ordering feature where required, particularly for exposed pins on outswing doors; do not assume it is included in an unmarked selection. Special pins and tips require separate specification.

Our commercial catalog identifies UL-listed steel and stainless-steel BB5254 hinges for swinging fire doors, with a 3-hour reference. Confirm the exact listed hardware, fastening, preparation, and approved door-and-frame assembly. Do not transfer that reference to brass or treat a hinge alone as proof of the complete opening's rating.

Problems It Helps Address

• Heavy-weight hardware requirements: Provides the specified .190-inch, four-bearing configuration.
• Replacement matching: Identifies the exact size and preparation reference.
• Worn hinge movement: A properly fitted replacement can help restore consistent operation when the opening and mounting points are sound.

Care and Matching Template

Inspect fastening, alignment, bearing movement, finish, and door gaps periodically. Correct loose reinforcement or door sag rather than forcing operation. Follow supplied maintenance guidance and use finish-appropriate cleaning methods.

BB5254 5 x 4-Inch Heavy-Weight Hinge Template

Finish Reference Images