ABH A110HD/A110LL Aluminum Con...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$135.00
$94.15
ABH A110HD Aluminum Continuous Gear Hinge - Clear Anodized Aluminum Full Mortise, BHMA Grade 1

ABH A110HD/A110LL Aluminum Continuous Gear Hinge Full Mortise

(No reviews yet) Write a Review

Model: A110 HD C 79
$135.00
$94.15
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$135.00
$94.15
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

ABH A110HD/A110LL Aluminum Continuous Gear Hinges - BHMA Grade 1 Full Mortise with 450-1000 lb Capacity

Heavy-Duty Continuous Hinge Solution for Commercial Door Applications

The ABH A110HD/A110LL Aluminum Continuous Gear Hinges deliver BHMA Grade 1 certified performance for demanding commercial and institutional applications. These full-concealed, heavy-duty hinges support door weights from 450 lbs (A110HD) up to 1,000 lbs (A110LL) with 48" maximum door width compatibility. Fire rated up to 90 minutes for metal doors and 60 minutes for wood doors, these continuous hinges feature anodized aluminum construction with 32 bearings on 83" lengths for smooth, long-lasting operation.

Professional Features & Benefits

  • Door Weight Capacity: A110HD supports up to 450 lbs while A110LL handles up to 1,000 lbs with specialized staggered hole pattern for lead-lined doors.
  • Door Width Compatibility: Designed for doors up to 48" width with no door inset, flush mount installation.
  • Heavy-Duty Construction: Features 32 bearings on 83" hinges with 3" spacing for smooth operation and exceptional durability.
  • Fire Rating Performance: Certified for up to 90 minutes on metal doors and 60 minutes on wood doors for code compliance.
  • BHMA Grade 1 Certification: Meets BHMA 156.25 Grade 1 standards for commercial-grade reliability and performance.
  • Surface-Applied Design: No door or frame mortising required, simplifying installation and covering old butt hinge cutouts for easy retrofits.
  • Enhanced Security: Eliminates pry gap between door and frame while evenly distributing weight to prevent binding and sagging.
  • Premium Finish Quality: Anodized after machining with standard finishes including clear anodized, dark bronze anodized, and black anodized.

Technical Specifications

  • BAA Qualified: Yes
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Weight: 450
  • Fasteners: 12-24 X 3/4" undercut self drilling, thread forming tek machine screws
  • Hinge Type: Full Mortise
  • Keyed: N/A
  • Keyed Function: N/A
  • Product Category: Door Hinges and Pivots
  • Product Group: Door Hinges and Pivots
  • Product Model: A110HD/A110LL
  • Product Subgroup: Continuous Hinges
  • Product Type: Continuous Hinges
  • Subcategory: Full Mortise Hinges

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 ABH Quality?

ABH A110HD/A110LL Continuous Gear Hinges deliver professional-grade reliability with heavy-duty aluminum construction and 32 precision bearings rated for demanding commercial applications. BHMA Grade 1 certification and fire rating compliance ensure dependable performance where code requirements and long-term durability are essential. Engineered for commercial applications where consistent operation and security enhancement are critical requirements.

Product Specs

Product Group:
Door Hinges and Pivots
Door Weight:
450 lbs (A110HD) / 1,000 lbs (A110LL)
Fasteners:
12-24 X 3/4" undercut self drilling, thread forming tek machine screws
Product Subgroup:
Continuous Hinges
Product Type:
Continuous Hinges
Subcategory:
Full Mortise Hinges
Commercial/Residential:
Commercial
Hinge Type:
Full Mortise
Keyed:
N/A
Keyed Function:
N/A
BAA Qualified:
Yes
Product Model:
A110HD/A110LL
Product Category:
Door Hinges and Pivots
Department:
Door Hardware

ABH A110 HD C 79 – Frequently Asked Questions

1) How heavy a door will the ABH A110HD continuous geared hinge carry?
The A110HD carries doors up to 450 lbs. If you're heavier than that, the A110LL version of the same hinge is rated to 1,000 lbs. Both are the aluminum full mortise continuous geared hinge, so the weight rating is the deciding factor between them, not the mounting style. A continuous hinge carries that load along the entire door height rather than at three or four butt points, which is what keeps a heavy door from sagging out of square and dragging on the sill.
2) Which hinge do I order for a lead-lined X-ray room door?
Order the A110LL. It's the lead-lined door version of the ABH A110 aluminum continuous geared hinge, built with a staggered hole pattern so the fasteners miss the lead sheet and land in the door's structural material, and it's rated to 1,000 lbs, which is what a lead-lined leaf actually weighs. The standard A110HD tops out at 450 lbs and uses the regular hole pattern, so it's the wrong part for an imaging suite. Lead-lined is a selectable option on the hinge, available in all five lengths (79, 83, 85, 95 and 120 inches) and all three finishes.
3) Is the ABH A110 continuous gear hinge fire rated for a labeled opening?
Fire rated to 90 minutes on metal doors and 60 minutes on wood doors. That distinction matters on the job: a 90 minute wood labeled opening needs a different hinge, but a 90 minute hollow metal stair or corridor door is squarely inside the A110's rating. It also carries BHMA 156.25 Grade 1, the top performance grade, which is typically what an institutional spec calls for on continuous hinges.
4) The frame on my opening cannot be mortised for a continuous hinge - what mounts to the face of the door and frame instead?
The A110HD is a full mortise hinge, which means it goes between the door edge and the frame rabbet. When the existing frame will not take that prep, the surface mounted geared hinges are the ones to look at. The Design Hardware FSHD is a full surface heavy duty continuous geared hinge, the BEST 664HD is a full surface continuous geared hinge with a 90 minute UL fire rating, and the NGP HD5700 is a full surface geared hinge built for a 1/16 inch door inset on 1-3/4 inch to 2-1/4 inch doors. For an opening where the door hangs off the face of the frame with an offset, the Design Hardware FSOHD is the full surface offset version.
5) What is the closest cross-brand equivalent to the ABH A110HD aluminum full mortise continuous geared hinge?
Two comparables sit in the same full mortise geared class. The Pemko FM-RG Series is a Grade 1 aluminum full mortise raised geared continuous hinge with a 180 degree swing, so the material and mounting method match the A110HD most directly. The Design Hardware FMHD is a full mortise continuous geared hinge rated heavy duty. The A110HD itself is a full mortise hinge carrying BHMA 156.25 Grade 1 certification at 450 lb door weight, with the A110LL version going to 1,000 lb. If the door schedule calls out an aluminum full mortise geared hinge by generic description, the FM-RG is the cross reference a specifier will recognize.
6) My doors are set with an inset rather than flush to the frame - which continuous geared hinge covers that condition?
The A110HD is built for a flush condition with no door inset, so an inset opening needs a hinge designed around that gap. The BEST 663HD is a heavy duty continuous hinge for 3/32 inch inset doors and carries a 90 minute UL fire rating. The NGP HD5700 is a full surface geared hinge built for a 1/16 inch door inset on 1-3/4 inch to 2-1/4 inch doors and carries a 10C 90 minute fire rating on hollow metal. Measure the actual inset at the top and bottom of the door before choosing between them, because the two are cut for different gaps.
7) I need a continuous hinge for a 1-3/8 inch door. Is the ABH A110 the right one?
The A110HD and A110LL are commercial hinges built around the heavy leaf, so for a thinner 1-3/8 inch door look at the Pemko FM-SLF short leaf flush continuous geared hinge, which ZenSupply carries specifically for 1-3/8 inch doors with Grade 1 construction. 1-3/8 inch is the common older interior door thickness, and 1-3/4 inch is the standard commercial thickness the heavy duty geared hinges are aimed at.
8) Should I use a full mortise or a full surface continuous geared hinge on my opening?
Full mortise, like the ABH A110HD, sets into the edge of the door and the frame rebate so the hinge is concealed when the door is closed. It needs a door and frame that are square and prepped for it, and it fits flush with no inset. Full surface mounts to the face of the door and frame and is the choice on a retrofit where the existing edge prep is chewed up, on inset doors, or on a door you cannot take down for machining. ZenSupply carries both in heavy duty: Design Hardware FMHD is full mortise, FSHD is full surface, and FSOHD is a full surface offset for openings where the door and frame faces do not line up. On the concealed side the ABH A110HD is rated to 450 lbs and the A110LL to 1,000 lbs.
9) What screws come with the ABH A110 continuous hinge and do I need to drill the door first?
The A110HD and A110LL ship with 12-24 x 3/4 inch undercut self drilling, thread forming tek machine screws. Self drilling means they cut their own pilot in hollow metal, so on a steel door and frame you are not pre-drilling and tapping every hole down an 83 inch run. On wood or on a lead-lined leaf, confirm the substrate takes a tek screw before you start driving. Standard practice is to hang the hinge on the frame leaf first, then set the door leaf, working from the center out so the gear stays aligned.
10) Can I run an electric strike or electrified lock through the ABH A110 hinge?
Yes. The A110HD and A110LL can be ordered with an electrical power transfer prep, which is a selection you make when you place the order rather than something you cut in the field. That prep is what lets you run wire from the frame into the door for an electrified lock, an exit device, a request-to-exit switch, or a door position sensor without a surface mounted door loop hanging off the opening. If the door is a straight mechanical opening with no electrified hardware, take the no-prep version.
11) What else can I buy instead of the ABH A110 full mortise geared hinge?
For a like-for-like aluminum full mortise geared hinge, ZenSupply carries the Pemko FM-RG Series, a Grade 1 aluminum full mortise raised geared hinge with 180 degree swing, and the Design Hardware FMHD heavy duty full mortise geared hinge. The Pemko CFM84SLF-HD1 is an 84 inch Grade 1 full mortise short leaf flush hinge. Where the ABH separates itself is the published load rating: 450 lbs on the A110HD and 1,000 lbs on the A110LL for lead-lined doors, with fire ratings of 90 minutes on metal and 60 minutes on wood.
12) Is the NGP HD1100A the same thing as the ABH A110HD continuous hinge?
Not an equivalent. The NGP HD1100A is a concealed continuous geared hinge listed at Grade 3 with a 10C 90 minute fire rating on hollow metal, while the ABH A110HD is BHMA 156.25 Grade 1. If your spec calls out Grade 1, the HD1100A will not satisfy it. Same caution on the BEST 641 steel and BEST 651 stainless full mortise continuous hinges: both are medium duty, so they are not a swap for a Grade 1 heavy duty hinge on a 450 lb leaf. For a Grade 1 substitute, look at the Pemko FM-RG Series or the Pemko CFM84SLF-HD1.
13) Does the ABH A110 continuous hinge meet Buy American requirements for a federal job?
The A110HD and A110LL are BAA qualified, which is the box a federal or federally funded project needs checked under the Buy American Act. Paired with BHMA 156.25 Grade 1 and a 90 minute fire rating on metal doors, it's a hinge that clears the usual government and municipal spec language without a substitution request. Worth noting for GSA, VA, and school district work where domestic sourcing is written into the contract.
14) Is the Pemko DSH1000 an alternative to the ABH A110HD?
They are not interchangeable. The DSH1000 is an anti-barricade continuous hinge with 100 degree bidirectional operation, a Grade 1 product built so the door can be worked from either direction - it is specified for behavioral health, detention adjacent and similar openings where staff must get in. The A110HD is a full mortise continuous geared hinge rated for 450 lb doors, with the A110LL at 1,000 lb, specified for weight, alignment and pry resistance on a conventional single direction opening. Ordering the DSH1000 for a standard commercial door changes how the opening operates.
15) My interior office doors do not need a 450 lb rated hinge - is there a lighter continuous hinge that still uses full mortise prep?
Yes. The BEST 641 is a steel full mortise standard duty continuous hinge with hospital tips, rated medium duty, and the BEST 651 is the stainless steel full mortise version with hospital tips, also medium duty. Both mount full mortise, the same way the A110HD does, so the door and frame prep approach carries over. The A110HD is rated for 450 lb doors and the A110LL for 1,000 lb, which is the range to stay in when the leaf is heavy, glazed, or lead lined.
16) I need a continuous hinge for a wash-down kitchen or a coastal exterior opening - what should I use instead of anodized aluminum?
The BEST 651 is a stainless steel full mortise continuous hinge with hospital tips, rated medium duty, and it is the stainless option among the full mortise geared hinges. The A110HD is anodized aluminum, anodized after machining, offered in clear anodized, dark bronze anodized and black anodized. Stainless and anodized aluminum behave differently in standing moisture and chemical wash-down, so match the material to what the opening actually sees rather than to the finish color.
17) What is the difference between the ABH A110HD and the NGP HD5400A half surface geared hinge?
Mounting method is the difference that decides the order. The NGP HD5400A is an 83 inch half surface continuous geared hinge in aluminum alloy, carrying a 10C 90 minute fire rating on hollow metal - half surface means one leaf mortises into the frame while the other applies to the face of the door. The A110HD is full mortise, with both leaves concealed between door and frame, fire rated up to 90 minutes on metal doors and 60 minutes on wood doors, and rated for 450 lb doors. Half surface is the choice when the door face is available but the door edge prep is not.
18) I am hanging a 60 minute rated wood door - which continuous geared hinge suits it?
The A110HD and A110LL are fire rated up to 90 minutes on metal doors and 60 minutes on wood doors, so a 60 minute wood leaf falls inside their listing. The comparable NGP hinges state their ratings on hollow metal: the HD1100A concealed geared hinge, the HD5400A half surface hinge and the HD5700 full surface hinge each carry a 10C 90 minute fire rating on hollow metal. The BEST 663HD and 664HD are 90 minute UL fire rated heavy duty hinges. Match the hinge listing to the door substrate on the fire door label, not just to the minutes.
19) I am standardizing continuous hinges across a facility with a mix of mortised and surface mounted openings - can one geared hinge family cover all of them?
One model will not, but a matched family will. The A110HD and A110LL cover the full mortise openings at 450 lb and 1,000 lb door weight, in clear anodized, dark bronze and black. The Design Hardware heavy duty geared hinges run the same duty level across three mountings - FMHD full mortise, FSHD full surface, and FSOHD full surface offset - so a facility with mixed frame conditions can hold one duty level across the whole schedule. Survey the openings by mounting condition first, then assign the hinge type per opening rather than ordering one part number for the building.
20) Will an ABH A110 hinge hold up on a high traffic entrance that cycles all day?
That's the application it's built for. An 83 inch A110 runs 32 bearings at 3 inch spacing down the gear spine, so the load is spread along the full height of the door instead of concentrated at three butt hinge points. That's what stops a heavy leaf from sagging, binding on the strike, or racking the frame after a few hundred thousand cycles, and it's why continuous hinges get specified on schools, hospitals, and municipal buildings where the door never gets a rest. It carries BHMA 156.25 Grade 1, the top performance grade for hinges.
21) I want the hinge hidden when the door is closed - is the ABH A110HD concealed, or is there another geared hinge for that?
The A110HD is a full concealed full mortise geared hinge, so the barrel sits between the door and frame and closes the pry gap when the door is shut. The NGP HD1100A is the comparable concealed continuous geared hinge, catalogued at 83 inch with a 10C 90 minute fire rating on hollow metal. Both are concealed by mounting method, so the decision between them comes down to door weight and the length the opening needs rather than appearance.
How fast can I get the ABH A110 HD C 79 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 ABH A110 HD C 79 come with a warranty?
Absolutely. The ABH A110 HD C 79 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 ABH A110 HD C 79?
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 ABH A110 HD C 79 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.
!