Dormakaba 75240 Full Mortise I...
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$731.00
$472.88
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Dormakaba 75240 Full Mortise Intermediate Pivot, 3/4" Offset Hung, For 1-3/4" Lead Lined Doors, Left-Handed, Aluminum Painted

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Model: 75240 LH AL

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

$731.00
$472.88
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Dormakaba 75240 Full Mortise Intermediate Pivot, 3/4" Offset Hung, Left-Handed, Aluminum Painted Finish

The Dormakaba 75240 is a full mortise intermediate pivot engineered for left-handed, offset hung door applications. Designed specifically for 1-3/4" lead lined doors with a 3/4" offset configuration, this pivot provides a precise and reliable mounting solution for commercial door assemblies requiring intermediate pivot support. Finished in aluminum painted for a clean, professional appearance consistent with commercial architectural hardware standards.

Key Features

  • Full Mortise Design: Full mortise intermediate pivot construction integrates cleanly into the door edge, providing a flush, professional installation suitable for commercial applications.
  • 3/4" Offset Hung Configuration: Engineered with a 3/4" offset to accommodate specific door swing and clearance requirements in offset hung door assemblies.
  • Lead Lined Door Compatibility: Specifically designed for use with 1-3/4" lead lined doors, making it suitable for specialized environments such as medical imaging and radiation shielding applications.
  • Left-Handed Operation: Factory configured for left-handed door handing, ensuring correct pivot geometry and load distribution for LH door installations.
  • Aluminum Painted Finish: Features an aluminum painted finish that blends with standard commercial door frames and hardware for a cohesive aesthetic.
  • Commercial-Grade Construction: Built to commercial standards as a replacement part, maintaining the performance and dimensional accuracy of original Dormakaba pivot hardware.
  • Intermediate Pivot Function: Serves as an intermediate pivot point along the door height, distributing door weight and reducing stress on top and bottom pivot assemblies in tall or heavy door configurations.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Pivots
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 75240 LH AL

Typical Applications

  • Medical Imaging and Radiology Suites Requiring Lead Lined Door Hardware
  • Healthcare Facility Radiation Shielding Installations
  • Commercial Office Buildings with Offset Hung Door Systems
  • Educational Facilities Requiring Intermediate Pivot Support
  • Government and Institutional Buildings
  • Industrial and Specialty Facilities with Heavy or Tall Door Assemblies
  • Replacement and Maintenance Projects for Existing Dormakaba Pivot Systems

Why Dormakaba 75240?

Dormakaba pivot hardware is engineered to exact dimensional and performance specifications, ensuring reliable integration with compatible door assemblies. The 75240 LH AL intermediate pivot maintains the precision fit and commercial-grade durability expected from Dormakaba replacement parts, making it the dependable choice for facilities managers and installers working with lead lined or offset hung door systems.

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Pivots
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
75240 LH AL
Features:
Dorma Door Closer Parts & Accessories

Dormakaba 75240 LH AL – Frequently Asked Questions

1) Will the Dormakaba 75240 intermediate pivot work on a right-hand door?
No. The 75240 LH AL is factory configured left-handed, so the pivot geometry and load path only suit an LH offset hung door. Handing on an intermediate pivot is not field reversible, so a right-hand opening needs the RH version of the same pivot. Check the swing from the outside of the door before ordering.
2) Does this Dormakaba pivot fit a 1-3/4 inch lead lined door?
That is exactly what the 75240 is built for: 1-3/4 inch lead lined doors hung on a 3/4 inch offset. The extra mass of a lead lined leaf is why an intermediate pivot is specified in the first place, it shares weight with the top and bottom pivots. If your door is a standard hollow metal or wood leaf without lead lining, the pivot will still be mortised the same way, but the 75240 is the lead lined door part.
3) What is the difference between 1/2 inch offset and 3/4 inch offset pivots?
The offset is how far the pivot point sits out from the door face, and it has to match the rest of the pivot set and the frame prep. The Dormakaba 75240 is a 3/4 inch offset hung pivot. Mixing a 3/4 inch offset intermediate with a 1/2 inch offset top and bottom set will bind the door. Adams Rite, for example, splits the same way: the B1921 reinforcing pivot is 1/2 inch offset and the B1923 is 3/4 inch offset.
4) What is the closest alternative to the Dormakaba 75240 pivot if the door uses butt hinges instead of a full mortise intermediate pivot?
The Dormakaba 75240 is a full mortise intermediate pivot with a 3/4 inch offset for left-handed offset hung 1-3/4 inch lead lined doors, so it mortises into the door edge as part of a pivot-hung assembly. If the opening is hung on butt hinges rather than pivots, the Adams Rite B1923 reinforcing pivot also carries a 3/4 inch offset but is made to work with 4-1/2 inch wide butt hinges, reinforcing a hinged door instead of serving as an intermediate point in a pivot set. Confirm how the door is hung before choosing between them.
5) Does a 1/2 inch offset pivot work in place of the Dormakaba 75240?
No. The Dormakaba 75240 is built to a 3/4 inch offset hung geometry, and offset dimension sets the pivot point and door clearance. The Adams Rite B1921 reinforcing pivot is a 1/2 inch offset unit sized for 4 inch wide butt hinges, so it puts the door on a different swing arc and is not an interchange for a 3/4 inch offset opening. Within the Adams Rite reinforcing pivots, the B1923 is the 3/4 inch offset version.
6) Is the 75240 a full mortise pivot or a surface applied one?
Full mortise. The 75240 mortises into the door edge and the frame so it sits flush, which means the door and frame need the correct pivot prep routed for it. There is no surface plate version of this configuration, so if your existing door has only a surface applied intermediate pivot you will be cutting new prep.
7) Do I need an intermediate pivot at all, or will top and bottom pivots carry the door?
An intermediate pivot is added part way up the door height to share the load, and it matters most on tall or heavy leaves, which is why it is specified on lead lined radiology and imaging doors. On a standard height, standard weight leaf the top and bottom pivots usually carry it alone. If the original opening was built with an intermediate pivot, replace it, taking it out shifts all the weight back onto the end pivots.
8) Is the 75240 a genuine Dormakaba replacement part for an existing pivot set?
It is catalogued as a Dormakaba replacement part within the Dorma door closer parts and accessories line, so it holds the original dimensions for servicing an existing Dormakaba offset hung pivot system. For a maintenance swap, match handing (LH), offset (3/4 inch) and door thickness (1-3/4 inch) to what is coming out and the prep should carry over.
9) What is the difference between the Adams Rite B1921 and B1923 reinforcing pivots when specifying alongside a Dormakaba 75240 job?
The two Adams Rite units differ by offset and by the hinge width they pair with: the B1921 is a 1/2 inch offset reinforcing pivot for 4 inch wide butt hinges, while the B1923 is a 3/4 inch offset reinforcing pivot for 4-1/2 inch wide butt hinges. On a job already running the Dormakaba 75240, which is a 3/4 inch offset hung pivot, the B1923 matches that offset dimension, though it serves a butt-hinged leaf rather than acting as an intermediate pivot in a mortise pivot set.
10) What finish does the Dormakaba 75240 pivot come in?
One finish only: 689 aluminum painted. That is the standard painted aluminum tone used across commercial frames and closers, so it blends with aluminum painted door closers and frame hardware already on the opening. No plated or bronze option is offered on this pivot.
11) Is this pivot rated for commercial traffic or is it a residential part?
Commercial. The 75240 is built to commercial standards and is specified on healthcare, education, government and institutional openings, including radiation shielded imaging suites. It is not a residential hinge substitute.
How fast can I get the Dormakaba 75240 LH AL 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 Dormakaba 75240 LH AL come with a warranty?
Absolutely. The Dormakaba 75240 LH AL 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 Dormakaba 75240 LH AL?
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
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