Hager BB1279-NRP 4-1/2" x 4-1/2" Ball Bearing, Steel Hinge (NRP)

Hager BB1279 - Full Mortise -Five Knuckle - Ball Bearing -Standard Weight Hinge - Non-removable Pin (NRP)

For use on medium weight doors or doors requiring medium frequency service

Hinge Size: 4-1/2" x 4-1/2" (114 x 114 mm)

Material: Steel with Steel pin- ANSI A8112

Description: Non-removable Pin (NRP) Two ball bearings

Gauge of Metal: 0.134

Hole Count: 8

Screw Size: Wood Screws:1-1/4 x 12 - Machine Screws:1/2x 12-24       

Packaging: Sold as individual units (1 EACH), with all wood & half machine screws

Finishes: US10A - Antique Bronze, US10B - Oil Rubbed Bronze, US10D - Black Nickel, Oiled, US26D - Satin Chrome, US26 - Bright Chrome, US3 - Bright Brass, USP - Prime Coat, US4 - Satin Brass 

Ball Bearing (BB) Ball bearings are engineered to throw the knuckle

weight against specially hardened steel raceways, which ride on

the bearing surfaces. The one-piece cup protects the bearings from

moisture and dust. The cup supports no weight so it is not subjected

to functional friction, pressure or wear. Lateral wear is minimized

because the pin is held against thrust by the hardened steel top and

bottom raceways. The bearing units are securely press-fit to the leaf

knuckle to prevent loss when the hinge is disassembled.

The non-removable pin (NRP)has a small set screw in the body of the

barrel. This set screw is tightened down against the pin. The pin has

a groove in the position where the set screw makes contact, allowing

the set screw to seat. The set screw is positioned so it cannot be

reached unless the door is opened. If pin removal is necessary, the

set screw is merely removed and the pin tapped from the bottom

in the usual manner.

Related Categories

• Five Knuckle Ball Bearing