Don-Jo BB74540 Full Mortise Ball Bearing Hinge 4-1/2" x 4" in Satin Chrome

Don-Jo BB74540 Full Mortise Ball Bearing Hinge 4-1/2" x 4" in Satin Chrome

The Don-Jo BB74540 is a full mortise ball bearing hinge measuring 4-1/2" x 4" and finished in Satin Chrome (Finish 652), engineered for medium weight doors in commercial applications. Constructed from steel at a 0.134 gauge, this hinge features a 5-knuckle design with square corners and is built to ANSI A8112 template standards for reliable, code-compliant installation. Designed for average frequency use, the BB74540 delivers consistent, smooth operation in standard duty commercial door applications.

Key Features

• Full Mortise Design: Full mortise installation provides a clean, flush fit within the door and frame for a professional appearance and secure mounting.
• Hinge Size: 4-1/2" x 4" dimensions are suited for medium weight commercial doors requiring reliable, balanced support.
• Ball Bearing Construction: Ball bearing pivot points deliver smooth, consistent operation and reduced wear over the life of the hinge.
• Steel Construction at 0.134 Gauge: Heavy-gauge steel body provides structural integrity and durability for standard duty commercial use.
• 5-Knuckle Configuration: Five-knuckle design enhances strength and stability throughout the full range of door swing.
• Square Corner Style: Square corners ensure compatibility with standard commercial door and frame preparations for straightforward installation.
• ANSI A8112 Template Compliance: Manufactured to ANSI A8112 template specifications for consistent hole patterns and broad compatibility with commercial door hardware.
• Satin Chrome Finish (652): Satin Chrome finish offers a clean, contemporary aesthetic with corrosion resistance suitable for commercial environments.

Certifications & Compliance

• ANSI A8112 Template Compliant
• Commercial Grade Application

Technical Specifications

• Subcategory: Hinges
• Product Group: Door Hinges and Pivots
• Product Subgroup: Full Mortise Hinges
• Product Type: Full Mortise Hinges
• Commercial/Residential: Commercial
• Corner Style: Square corners
• Duty Level: Standard Duty
• Knuckles: 5
• Product Size: 4.5" x 4"
• Product Category: Door Hinges and Pivots
• Department: Door Hardware

Typical Applications

• Commercial Office Buildings
• Educational Facilities
• Healthcare Institutions
• Retail Establishments
• Industrial and Warehouse Facilities
• Multi-Tenant Residential Properties
• Government and Municipal Buildings

Why Don-Jo BB74540?

Don-Jo full mortise ball bearing hinges are built to ANSI A8112 template standards using 0.134 gauge steel construction, ensuring consistent performance and compatibility across a wide range of commercial door applications. The BB74540's ball bearing design and 5-knuckle configuration deliver smooth, dependable operation for medium weight doors in standard duty commercial environments where reliable, long-lasting hardware is essential.