Don-Jo HWBB74545 Heavy Weight Full Mortise Ball Bearing Hinge 4-1/2" x 4-1/2" in Satin Chrome

Don-Jo HWBB74545 Heavy Weight Full Mortise Ball Bearing Hinge 4-1/2" x 4-1/2" in Satin Chrome

The Don-Jo HWBB74545 is a heavy weight, full mortise ball bearing hinge engineered for demanding commercial door applications. Measuring 4.5" x 4.5" with square corners and a 5-knuckle design, this hinge is constructed from 0.18-gauge steel and finished in Satin Chrome (652) for lasting durability and a professional appearance. Designed specifically for heavy doors and high-frequency use, it meets ANSI A8111 standards and includes a non-removable pin (NRP) as standard for enhanced security.

Key Features

• Heavy Weight Construction: Built from 0.18-gauge steel specifically engineered for heavy doors in demanding commercial environments.
• Full Mortise Design: Full mortise installation provides a clean, flush fit for professional-grade door hardware applications.
• Ball Bearing Operation: Ball bearing mechanism delivers smooth, high-frequency operation ideal for doors that see constant daily use.
• 4.5" x 4.5" Size with Square Corners: Standard commercial sizing with square corners for compatibility with a wide range of commercial door preparations.
• 5-Knuckle Configuration: Five-knuckle design provides superior strength and load distribution for heavy-duty performance.
• Non-Removable Pin (NRP) Standard: All heavy duty hinges include non-removable pins as standard, providing added security against pin removal on outswing doors.
• Satin Chrome Finish (652): Corrosion-resistant Satin Chrome finish complements a wide range of commercial door hardware and architectural styles.
• High-Frequency Rated: Designed and tested for high-frequency door operation, ensuring long-term reliability in busy commercial settings.

Certifications & Compliance

• ANSI A8111 Compliant
• Commercial Grade
• Non-Removable Pin (NRP) Standard on All Heavy Duty Hinges

Technical Specifications

• Product Group: Door Hinges and Pivots
• Product Subgroup: Full Mortise Hinges
• Commercial/Residential: Commercial
• Bearing Type: Ball Bearing
• Corner Style: Square corners
• Knuckles: 5
• Product Size: 4.5" x 4.5"
• 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 HWBB74545?

Don-Jo HWBB74545 full mortise ball bearing hinges deliver professional-grade reliability through 0.18-gauge steel construction, a 5-knuckle design, and ANSI A8111 compliance — all purpose-built for heavy doors and high-frequency commercial use. With non-removable pins included as standard and a durable Satin Chrome finish, this hinge is engineered to meet the rigorous demands of commercial door hardware installations where dependable, long-term performance is essential.