Hager BB1129 Half Mortise Ball...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$108.52
$62.05
Hager BB1129 Half Mortise Ball Bearing Hinge - 5 Knuckle Steel Construction for Medium Duty Commercial Applications

Hager BB1129 Half Mortise Ball Bearing Hinge - 5 Knuckle Steel Construction for Medium Duty Commercial Applications

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Model: HAG-BB1129 4-1/2 US26D
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Hager BB1129 Half Mortise Ball Bearing Hinge - 5 Knuckle Steel Construction for Medium Duty Commercial Applications

Professional Half Mortise Hinge Solution for Commercial Door Applications

The Hager BB1129 Half Mortise Ball Bearing Hinge delivers reliable performance for medium weight hollow metal doors with channel iron frames requiring medium frequency service. This 5-knuckle steel construction hinge features dual ball bearings and meets ANSI A8212 certification standards. The reversible design with beveled surface leaf provides versatile installation options for commercial applications.

Professional Features & Benefits

  • Dual Ball Bearing System: Two ball bearings provide smooth operation and extended service life for medium duty commercial applications.
  • 5-Knuckle Steel Construction: Durable steel construction with steel pin ensures long-lasting performance in demanding environments.
  • Half Mortise Design: One leaf mortised in door, other surface applied to frame - ideal for hollow metal doors with channel iron frames.
  • Reversible Configuration: Beveled surface leaf design allows for flexible installation on left or right-hand doors.
  • Non-Rising Removable Pin: Button tip and plug design enables easy maintenance and door removal when needed.
  • ANSI Certified Performance: Meets ANSI A8212 standards for reliable commercial-grade operation.
  • Multiple Finish Options: Available in USP, US10B, and US26D finishes to match various architectural requirements.
  • Standard Fastener Compatibility: Door leaf uses 1/2" x 12-24" FH fasteners, jamb leaf uses 1/2" x 12-24 OH fasteners.
  • Two ball bearings. Non-rising removable pin with button tip and plug.;

Technical Specifications

  • ANSI/BHMA: ANSIA8412
  • Applications: For use on medium weight hollow metal doors with channel iron frames requiring medium frequency service.
  • Bearing Type: Ball Bearing
  • Certifications: ANSI A8212;
  • Commercial/Residential: Commercial
  • Duty Level: Medium Duty
  • Fastener Size - Machine: Door Leaf: 1/2" x 12-24" FH, Jamb Leaf: 1/2" x 12-24 OH .
  • Features: Half Mortise, 5-Knuckle, Ball Bearing, Standard Weight.
  • Finishes: USP, US10B, US26D;
  • Knuckles: Features: Two ball bearings. Non-rising removable pin with button tip and plug. ;
  • Material: Steel with Steel Pin ;
  • Notes: Beveled surface leaf
  • Subcategory: Half Surface Commercial Hinges

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

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

Why Choose Hager Quality?

Hager architectural hinges deliver professional-grade reliability with steel construction and dual ball bearing systems engineered for medium duty commercial applications. Meeting ANSI A8212 certification standards, this hinge provides dependable performance where consistent operation is essential. Hager’s reputation as the industry’s premiere designer and manufacturer of architectural hinges ensures quality that meets or exceeds ANSI standards for demanding commercial environments.

Full mortise commercial hinge engineered to meet or exceed ANSI standards for door weight, frequency of use, and finish durability.

Product Specs

Subcategory:
Half Surface Commercial Hinges
Knuckles:
5
Product Group:
Door Hinges and Pivots
Product Subgroup:
Half Mortise Hinges
Product Type:
Half Surface Hinges
Features:
Half Mortise, 5-Knuckle, Ball Bearing, Standard Weight.
ANSI/BHMA:
ANSI A8412
Duty Level:
Medium Duty
Bearing Type:
Ball Bearing
Commercial/Residential:
Commercial
Product Model:
BB1129
Product Category:
Door Hinges and Pivots
Product Substrate:
Steel
Department:
Door Hardware

Hager HAG-BB1129 4-1/2 US26D – Frequently Asked Questions

1) What is a half mortise hinge and when do I use one instead of a full mortise?
On a half mortise hinge like the Hager BB1129, one leaf is mortised into the edge of the door and the other leaf is surface applied to the frame. That is the configuration you want on medium weight hollow metal doors hung in channel iron frames, where the frame cannot be routed for a mortised leaf. If both your door and frame can take a mortise, a full mortise hinge is the normal choice; the half mortise exists specifically for the frame that cannot be prepped.
2) Will the Hager BB1129 hinge hold up on a door that gets used all day?
The BB1129 is rated medium duty, for medium frequency service on medium weight doors. Two ball bearings in a 5 knuckle steel barrel carry the load. For a high traffic opening (a main entrance, a stairwell door on a busy floor, a heavy fire rated door), medium duty is the wrong specification and you want a heavy weight ball bearing hinge instead. Interior offices, classrooms, back of house and tenant doors are where this one belongs.
3) Do I have to order a left hand and right hand version of the BB1129 hinge?
No. The BB1129 is reversible, so the same hinge works on a left hand or a right hand door. The surface leaf is beveled, which is what lets it sit correctly either way. You order by size and finish only, not by handing.
4) Will a 4-1/2 inch or a 5 inch hinge be right for my door?
Hinge width is driven by door thickness and how far the door has to clear the trim or frame return when open. On a standard 1-3/4 inch commercial door with no deep trim, 4-1/2 x 4-1/2 is the usual size. Go to 5 x 5 when the door is thicker, when the frame has a deep reveal, or when the door must swing clear of projecting casing. Hager publishes a hinge size selection chart for its commercial half mortise line that maps door thickness and width to the correct hinge size.
5) I need to replace a hinge from another manufacturer on a hollow metal door. Will the Hager BB1129 drop in?
Hager publishes a commercial hinge cross reference that maps competitor hinge numbers to the equivalent Hager model, which is the right way to confirm a swap. What you match on is size, mortise type and duty: the BB1129 is a half mortise, medium duty, 5 knuckle ball bearing hinge in 4-1/2 x 4-1/2 or 5 x 5. If the existing hinge is a full mortise or a full surface, this one will not reuse the prep no matter what size it is.
6) What is the closest equivalent to the Hager BB1129 half mortise hinge for a hollow metal door with a channel iron frame?
The BEST F173 is the nearest peer in the same half surface architectural hinge family, and like the BB1129 it is rated medium duty. The difference that decides the job is the bearing: the BB1129 runs two ball bearings, while the F173 is a plain bearing hinge. On a medium frequency opening where the door swings all day, the ball bearing carries the cycling better; on a lower traffic door the plain bearing F173 is a simpler build. Both are steel with a removable pin, so the door can be taken down without pulling the hinge off the frame.
7) Is the BEST F173 a drop-in substitute for a Hager BB1129, or is it a different hinge?
They are close cousins, not twins. Both are steel half surface hinges in the medium duty class with a removable pin, so the mounting concept is the same: one leaf mortised, the other surface applied. What is not the same is the bearing stack. The BB1129 carries two ball bearings and a non-rising removable pin with button tip and plug; the F173 is specified as plain bearing. If a facility standard calls out ball bearing hinges for the opening, the F173 does not satisfy it. Confirm leaf size and hole pattern against the existing frame prep before swapping either way, since the BB1129 is ordered in 4.5 x 4.5 and 5 x 5.
8) Our spec sheet calls for a ball bearing half surface hinge - which of these two meets it?
The Hager BB1129 meets it. It is a ball bearing hinge with two bearings, five knuckles, steel with a steel pin, and it carries ANSI A8412 in the half surface commercial hinge class. The BEST F173, though also a steel half surface hinge in the medium duty class, is a plain bearing design and will not satisfy a ball bearing callout. If the drawing also fixes a finish, the BB1129 is ordered in 613 satin bronze oil-rubbed, 626 satin chrome, and 600 primed for painting.
9) What sizes and finishes does the Hager BB1129 half mortise hinge come in?
Two sizes, 4-1/2 x 4-1/2 inch and 5 x 5 inch, each in three finishes: 600 primed for painting, 613 satin bronze oil rubbed, and 626 satin chrome. Every finish is offered in both sizes. Pick 600 if the frames are being field painted to match a color; 626 is the usual match for satin chrome lever and closer hardware already in a commercial building.
10) Can I pull the door off the BB1129 hinge without unscrewing the hinge?
Yes. The pin is non-rising and removable, with a button tip and plug. Drive the pin out and the door lifts off the frame leaf, so you can take a door out for painting, glass work or moving furniture and rehang it without touching the mounting screws or the door prep.
11) What screws come with the Hager BB1129 and what do they thread into?
The door leaf takes 1/2 inch 12-24 flat head machine screws and the jamb leaf takes 1/2 inch 12-24 oval head machine screws. Those are machine threads, not wood screws, so the door and the channel iron frame both need to be tapped for 12-24. On hollow metal that is standard prep, but if you are hanging this on anything that is not already tapped, plan on drilling and tapping before install day.
12) Does the Hager BB1129 hinge carry an ANSI grade?
The BB1129 is listed to ANSI A8412 under ANSI/BHMA A156.1, the standard for butt hinges. That is the specification line to put on a submittal for a medium duty steel ball bearing hinge on a commercial opening.
13) How many hinges do I need per door, and how do I lay them out?
Standard commercial practice is three hinges on a door up to 7 feet 6 inches, adding one for every additional 30 inches of height. Hager publishes its standard hinge location dimensions, so the top, bottom and intermediate hinge heights come straight off that sheet rather than being field measured. Order in multiples of what the opening needs; the BB1129 is sold as an individual hinge, not a boxed set of three.
14) Can I get the BB1129 with wiring through it for an electric strike or mag lock setup?
The BB1129 as ordered is a mechanical hinge with a steel pin and no electrical provision. Hager does publish a concealed electric hinge modification, which is how power transfer through a hinge gets specified on their commercial line. If your opening needs power to the door for an electrified lock or exit device, that is a modified or purpose built electric hinge, not this catalog number.
15) Is the Hager BB1129 a fire rated hinge?
The BB1129 is a steel hinge built for medium duty commercial service and listed to ANSI A8412. Steel construction and a non-rising pin are what a fire door assembly requires from a hinge, but the fire rating on any opening belongs to the labeled door and frame assembly as a whole, so match the hinge to what the door manufacturer's listing calls for on that specific opening.
How fast can I get the Hager HAG-BB1129 4-1/2 US26D delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Hager HAG-BB1129 4-1/2 US26D come with a warranty?
Absolutely. The Hager HAG-BB1129 4-1/2 US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Hager HAG-BB1129 4-1/2 US26D?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Hager HAG-BB1129 4-1/2 US26D from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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