Corbin Russwin ML2052 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,476.00
$843.36
Copy of Corbin Russwin ML2055 Mortise Classroom with LW-Lustra Lever, A Rose, 626 Satin Chrome,

Corbin Russwin ML2052 Grade 1 Classroom Intruder Mortise Lock with LW-Lustra Lever, A Rose, 626 Satin Chrome

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Model: ML2052 LWA 626
$1,476.00
$843.36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,476.00
$843.36
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Corbin Russwin ML2052-LWA-626 Classroom Intruder Mortise Lock with LW-Lustra Lever, A Rose, Satin Chrome Finish

Grade 1 Commercial Mortise Lock Engineered for Classroom Intruder Security

The Corbin Russwin ML2052-LWA-626 is a Grade 1 Classroom Intruder Mortise Lock from the ML2000 Series, purpose-built for high-traffic commercial, institutional, industrial, and government applications. Constructed of heavy-gauge steel, this mortise lock features a patented Quick Reversible latchbolt and a 1" stainless steel deadbolt, delivering life safety and security in a single door prep. Finished in 626 Satin Chrome with the LW-Lustra lever and A Rose trim, it combines professional aesthetics with field-reversible handing for flexible installation. The ML2000 Series has been UL cycle tested above and beyond requirements, completing 14.5 Million Cycles (Verification ID: V875753), and is backed by a 10-year warranty.

Professional Features & Benefits

  • ANSI/BHMA Grade 1 mortise lock per A156.13 Series 1000, Operational and Security Grade 1
  • UL Cycle above and beyond: 14.5 Million Cycles (Verification ID: V875753)
  • Patented Quick Reversible latchbolt — reverse handing without disassembling the lock case
  • Multi-function capability: 12 functions configurable from one ML2054 lockbody
  • Heavy-gauge steel lockcase 5-7/8" x 4" x 15/16"; 1" stainless steel deadbolt, 1" throw
  • 3/4" (19mm) throw anti-friction two-piece latchbolt requires less force to close
  • Wide variety of trim designs including Muséo®, Vineyard™, Behavioral Health (BHSS/BLSS)
  • Status indicator options for locked/unlocked visibility (sectional and escutcheon trim)
  • Motorized Electric Latch Retraction (MELR) available for ML20900 series
  • Thru-bolted trim designs for proper alignment and increased security
  • Can be used with new or existing Corbin Russwin key systems; accepts most other manufacturers' cylinders
  • UL/cUL listed, UL10C positive pressure; 3-hour fire door up to 4' x 10' single or 8' x 10' pair
  • Ten-year mechanical warranty; five-year MELR; two-year electrical

Technical Specifications

  • Grade: ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1
  • Handing: Handed; quick reversible — re-handed without disassembling the lock case
  • Door Thickness: 1-3/4" (44mm) standard; optional thicknesses available
  • Backset: 2-3/4" (70mm)
  • Lockcase: Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm)
  • Armored Front: Wrought brass, bronze, or stainless steel, 8" x 1-1/4"
  • Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" (19mm) throw
  • Auxiliary Latchbolt: 9/16" (14mm) effective throw; deadlocking
  • Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" (25mm) throw
  • Strike: Wrought brass, bronze, or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center
  • Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
  • Spacing: C. to c. knob/lever to cylinder: 3-5/8" (92mm); knob/lever to thumbturn: 2-7/16" (62mm)
  • Certifications: ANSI/BHMA A156.13 Grade 1; UL/cUL UL10C 3-hour positive pressure; ADA A117.1; California State Fire Marshal; Windstorm/Hurricane certified
  • Warranty: Ten-year mechanical; five-year MELR; two-year electrical

Professional Applications

  • K-12 Schools and Educational Facilities Requiring Classroom Intruder Protection
  • Higher Education Campuses and University Buildings
  • Commercial Office Buildings
  • Healthcare Institutions and Hospitals
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities
  • Hotels and Multi-Tenant Residential Properties

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a formidable barrier against vandalism and abuse. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, any door can be transformed into a robust deterrent against intruders.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability with heavy-gauge steel construction and a patented Quick Reversible latchbolt, rated for an extraordinary 14.5 Million Cycles in UL cycle testing (Verification ID: V875753). Every ML2052 is backed by a 10-year warranty, providing lasting confidence for facility managers and security professionals. Engineered for demanding commercial, institutional, and government applications where dependable classroom intruder protection and long-term performance are essential.

Product Specs

Product Group:
Parts and Accessories
Series:
ML2000 Series
Grade:
Grade 1
Product Subgroup:
Parts and Accessories
Product Type:
Lock Trim
Commercial/Residential:
Commercial
Lock Type:
Mortise
Subcategory:
Parts and Accessories
Product Attribute:
Parts and Accessories
Product Model:
ML2052
Product Function:
Classroom Intruder
Door Hand Direction:
Field Reversible
Product Category:
Mechanical Locks
Department:
Door Hardware

Corbin Russwin ML2052 LWA 626 – Frequently Asked Questions

1) How does the ML2052 classroom intruder function actually work on a school door?
The ML2052 is the classroom intruder (security) function in the Corbin Russwin ML2000 Series. A teacher locks the door from inside the room, so nobody has to step into the corridor during a lockdown. It carries both a latchbolt and a separate one inch throw stainless steel deadbolt in one door prep, so the opening gets life safety and security from a single mortise case.
2) Will a Corbin Russwin ML2052 mortise lock fit my existing 1-3/4 inch door prep?
Yes, 1-3/4 inch (44mm) is the standard door thickness for the ML2052, and other thicknesses are available as an option. The lockcase measures 5-7/8 x 4 x 15/16 inches with a 2-3/4 inch backset and an 8 x 1-1/4 inch armored front, which is standard ANSI mortise prep. If your existing pocket was cut for a different manufacturer's case, confirm the pocket depth and front cutout before you order.
3) Do I have to order the ML2052 mortise lock handed, or can I re-hand it in the field?
Order it and re-hand it on site. The ML2000 Series uses a patented Quick Reversible latchbolt, so handing changes without taking the lock case apart. That makes it practical to stock one lock for both left and right hand openings across a building.
4) Can I use the ML2052 on a fire rated classroom door?
It is UL/cUL listed and UL10C positive pressure rated, good for 3 hour fire doors up to 4 by 10 feet single or 8 by 10 feet pair. It also meets ADA A117.1, is California State Fire Marshal listed, and is windstorm/hurricane certified, which covers most K-12 and healthcare corridor requirements.
5) Will the ML2052 work with the keys we already use in our building?
It accepts new or existing Corbin Russwin key systems and will take most other manufacturers' cylinders, so it can usually be brought onto a master key system already in place. The standard cylinder is brass, 6-pin, L4 keyway, supplied 0-bitted. If your locksmith is supplying the cylinder, order the Less Cylinder version instead.
6) Will the ML2052 latch into the strike already in my frame?
The latchbolt is a two piece mechanical unit with an anti-friction insert and a 3/4 inch (19mm) throw, with a 9/16 inch effective throw deadlocking auxiliary latch. The deadbolt throws a full 1 inch. The supplied strike is the ANSI straight lip type, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. An existing ANSI strike will normally take the latch, but a one inch deadbolt needs a strike box deep enough to receive it, so check the frame cutout on a retrofit.
7) What do I have to choose when ordering the Corbin Russwin ML2052 with the Lustra lever?
Three decisions. Trim style: A Rose, a 2-1/4 inch diameter round rose, or the M Escutcheon, a full plate that covers more of the door face and hides older prep. Cylinder: standard (cylinder included) or Less Cylinder if you are keying it yourself. The lever is the LW Lustra wrought lever and the finish is 626 satin chrome, which is the common commercial brushed chrome used across schools and offices.
8) Is a mortise lock like the ML2052 worth it over a cylindrical lock for a classroom?
For a classroom intruder opening, yes. A mortise case puts a latchbolt and a separate one inch deadbolt in one pocket, which a cylindrical lockset cannot do, and it is ANSI/BHMA A156.13 Series 1000 Grade 1 for both operation and security. The tradeoff is the door prep: mortise needs a pocket cut into the door edge, so on an existing door already bored for a cylindrical lock you are looking at a door replacement or a new prep.
9) How durable is the ML2000 Series for a high traffic school corridor?
Heavy-gauge steel lock case, and the series was UL cycle tested to 14.5 million cycles (Verification ID V875753), well past the Grade 1 requirement. The anti-friction two piece latchbolt also takes less force to close the door, which matters on doors that get hit hundreds of times a day.
10) We need different lock functions on different doors. Do we have to stock a separate lock body for each?
Not across the ML2000 range. Twelve functions can be configured from a single ML2054 lock body, so a maintenance shop can carry one case and change function as needed. There is also a Motorized Electric Latch Retraction option on the ML20900 series if an opening needs access control tie-in.
11) How far apart are the lever and cylinder holes on an ML2000 mortise lock?
Center to center from the knob or lever to the cylinder is 3-5/8 inches (92mm), and lever to thumbturn is 2-7/16 inches (62mm). Those are the numbers to check against an existing door face prep if you are swapping into an opening that already has a mortise lock in it.
12) Can I tell from the hallway whether a classroom door is locked?
Status indicator trim showing locked/unlocked is offered in the ML2000 Series on both sectional and escutcheon trim, so it can be specified on a classroom intruder opening. Many districts pair it with the classroom security function so staff can confirm a lockdown at a glance without trying the lever.
13) Is there a vandal resistant version of the Corbin Russwin ML2000 mortise lock?
Yes. The ML2000VR option uses stainless steel escutcheons with tapered edges and Torx pin tamper-resistant screws. Combined with Corbin Russwin patented Pyramid or Access 3 high-security cylinders it suits detention-adjacent, behavioral health, and abuse-prone openings. All ML2000 trim is thru-bolted, which helps alignment and makes the trim harder to pull.
How fast can I get the Corbin Russwin ML2052 LWA 626 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 Corbin Russwin ML2052 LWA 626 come with a warranty?
Absolutely. The Corbin Russwin ML2052 LWA 626 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 Corbin Russwin ML2052 LWA 626?
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 Corbin Russwin ML2052 LWA 626 from ZenSupply?
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