Ives 5 Knuckle Ball Bearing Full Mortise Hinge with Round Corners - Standard Duty , NRP

Ives 5 Knuckle Ball Bearing Full Mortise Hinge with Round Corners - Standard Duty , NRP

The Ives 5 Knuckle Ball Bearing Full Mortise Hinge (typically categorized under the 5BB1 series) is a workhorse in the commercial architectural hardware world. These hinges are designed for medium-weight doors or doors requiring low-frequency service in commercial and institutional settings.

The NRP (Non-Removable Pin) feature is a critical security upgrade, making this hinge ideal for out-swinging doors where the hinge barrel is exposed to the exterior.

Key Product Specifications

• Hinge Type: Full Mortise (flush with the door and frame).

• Knuckle Count: 5 Knuckle design for traditional aesthetics and strength.

• Bearing Type: Ball Bearing (smooths the swing and prevents "metal-on-metal" grinding).

• Corners: Round Corners (typically 1/4" or 5/8" radius, often used for doors pre-prepped by automated machinery).

• Material: Usually available in Steel (for interior) or Stainless Steel/Brass (for exterior/corrosion resistance).

• Pin Type: NRP (Non-Removable Pin). A set screw in the barrel locks the pin in place when the door is closed, preventing intruders from tapping the pin out to remove the door.

Why Choose Ives Quality?

Ives architectural hinges deliver professional-grade reliability with steel construction and dual ball bearing assemblies rated for 1,500,000 cycles under Grade 2 performance standards. UL Classified for windstorm rated assemblies and certified to exceed ANSI/BHMA A156.1 requirements, these hinges provide the dependable performance essential for demanding commercial applications. Engineered for medium-duty service with complete fastener packages for immediate installation.