Corbin Russwin ML2055 Grade 1 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,281.64
$735.88
Corbin Russwin ML2055 Grade 1 Mortise Classroom with LW-Lustra Lever, A Rose, 626 Satin Chrome

Corbin Russwin ML2055 Grade 1 Mortise Classroom with LW-Lustra Lever, A Rose, 626 Satin Chrome

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Model: ML2055-LWA-626
$1,281.64
$735.88
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,281.64
$735.88
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Corbin Russwin ML2055-LWA-626 Mortise Classroom Lock with LW Lustra Lever, A Rose, Satin Chrome Finish

Grade 1 Commercial Mortise Lock for High-Traffic Institutional Applications

The Corbin Russwin ML2055-LWA-626 is a Grade 1 mortise classroom lock from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Featuring ANSI function F01, this lock allows latchbolt retraction by grip from either side with both grips always free, making it ideally suited for classroom security applications. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and Corbin Russwin's patented Quick Reversible latchbolt, the ML2055 is finished in 626 Satin Chrome with the LW Lustra lever on an A Rose, delivering both durability and refined aesthetics for offices, schools, hospitals, hotels, and other high-use facilities.

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

  • Educational Facilities and Classrooms
  • Commercial Office Buildings
  • Healthcare Institutions and Hospitals
  • Hotels and Hospitality Properties
  • Government and Municipal Buildings
  • Industrial and Institutional Facilities
  • Multi-Tenant Residential and Mixed-Use Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability backed by heavy-gauge steel construction and a 1" stainless steel deadbolt, with UL Cycle testing verified at 14.5 Million Cycles (Verification ID: V875753) — performance that goes well above and beyond standard requirements. The ML2055 is covered by a 10-year warranty, providing long-term confidence for facility managers and security professionals. Engineered for the most demanding commercial, institutional, and government applications, Corbin Russwin mortise locks combine proven durability, versatile trim options, and field-reversible convenience in a single, trusted solution.

Product Specs

Product Group:
Mechanical Locks
Series:
ML2000 Series
Grade:
Grade 1
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Lock
Commercial/Residential:
Commercial
Lock Type:
Mortise
Subcategory:
Parts and Accessories
Product Attribute:
Parts and Accessories
Product Model:
ML2055
Product Function:
Classroom
Door Hand Direction:
Field Reversible
Product Category:
Mechanical Locks
Department:
Door Hardware

Corbin Russwin ML2055-LWA-626 – Frequently Asked Questions

1) What does the ANSI F01 classroom function on the Corbin Russwin ML2055 actually do?
F01 is the classroom function: the latchbolt retracts by grip from either side and both levers stay free at all times. The key cylinder outside controls the deadbolt rather than the lever, so a teacher locks the door with the key and nobody gets trapped inside. The deadbolt is one-piece stainless steel with a 1 inch throw.
2) Will the ML2055 mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset?
That is the standard configuration. The ML2055 is built for 1-3/4 inch (44mm) doors with a 2-3/4 inch (70mm) backset, and optional door thicknesses are available. The lock case itself measures 5-7/8 x 4 x 15/16 inches, with an 8 x 1-1/4 inch armored front, so your existing ANSI mortise pocket needs to match those.
3) Do I have to order the ML2055 classroom lock handed, or can I re-hand it on site?
Order it and re-hand it in the field. The lock is handed as shipped but uses Corbin Russwin's patented Quick Reversible latchbolt, so the handing is reversed without disassembling the lock case. That is why the hand direction is listed as field reversible, and it is the reason a school or MRO stockroom can keep one lock on the shelf for both left and right openings.
4) Can I use the ML2055 on a fire-rated classroom door?
Yes. The ML2000 Series mortise lock is UL/cUL listed and UL10C positive pressure rated, good for a 3-hour fire door up to 4 ft x 10 ft single or 8 ft x 10 ft pair. It also carries ANSI/BHMA A156.13 Series 1000 Grade 1 for both operational and security, ADA A117.1, California State Fire Marshal, and windstorm/hurricane certification.
5) Should I order the ML2055 with a cylinder or less cylinder?
Depends on whether you are keying it into an existing system. Standard ships with a brass 6-pin L4 keyway cylinder, 0-bitted, so your locksmith pins it to your bitting. Less Cylinder is the choice when you are supplying your own cylinder, including most other manufacturers' cylinders, which the lock accepts. Both options are offered with the LW Lustra lever in 626 Satin Chrome on either an A Rose or an M Escutcheon.
6) Will the ML2055 latch into the strike that is already in my frame?
Check the lip. The lock uses a two-piece anti-friction latchbolt with a 3/4 inch (19mm) throw plus a deadlocking auxiliary latch at 9/16 inch (14mm) effective throw, and the supplied strike is an ANSI straight lip, 4-7/8 x 1-1/4 inches with 1-1/8 inch lip to center. If your frame already has a standard ANSI 4-7/8 inch mortise strike prep, it drops in; a non-ANSI or box strike from an older lock will need to be swapped.
7) Can I key the ML2055 into our building's existing Corbin Russwin master key system?
Yes. The ML2055 works with new or existing Corbin Russwin key systems, and the standard cylinder is a 6-pin L4 keyway shipped 0-bitted for your locksmith to pin to your bitting. If your facility is standardized on another manufacturer's cylinders, the lock accepts most of those as well, so order the Less Cylinder version and install your own.
8) What is the difference between the A Rose and M Escutcheon trim on this Corbin Russwin mortise lock?
The A Rose is a 2-1/4 inch diameter round rose, the compact look most classroom and office doors use. The M Escutcheon is a full plate, which covers more of the door face and is the trim style that supports the locked/unlocked status indicator options (available on sectional and escutcheon trim). Both come with the LW Lustra wrought lever in 626 Satin Chrome, and all trim is thru-bolted for alignment and security.
9) Is a mortise lock like the ML2055 the right choice for a high-traffic school corridor, or is a cylindrical lever enough?
For corridor and classroom doors that get hit all day, the mortise is the heavier answer: a heavy-gauge steel case pocketed into the door, Grade 1 operational and security per A156.13 Series 1000, and UL cycle verification at 14.5 million cycles (Verification ID V875753). A cylindrical lever is cheaper to prep but puts all the load on a bored hole. Mortise prep also gets you the separate 1 inch deadbolt, which a classroom cylindrical lock does not have.
10) Is there an electrified version of the Corbin Russwin ML2000 mortise lock for access control?
Motorized Electric Latch Retraction (MELR) is offered, but on the ML20900 series rather than the mechanical ML2055 classroom lock. If your opening needs remote latch retraction tied into card access, specify from the ML20900 range; the ML2055 is the straight mechanical F01 classroom function.
11) How much space do I need between the lever and the cylinder when laying out the door prep?
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 figures to use when checking an existing door face prep or marking a new one, along with the 8 x 1-1/4 inch armored front at the door edge.
12) If we later want a different function on the same doors, do we have to buy new ML2000 locks?
Not necessarily for the lock body. The ML2000 Series is multi-function: 12 functions are configurable from a single ML2054 lockbody, so a stockroom can carry one body and set it to the function the opening needs. Trim and cylinder still have to suit the function you end up with.
13) Will the 626 Satin Chrome finish on this lock match the rest of our door hardware?
626 is satin chrome, the standard dull chrome plating used across most commercial openings, and it is the finish offered here with the LW Lustra wrought lever. If your building is standardized on satin stainless or satin nickel trim it will read very close; against bright chrome or brass it will not match.
14) Does the ML2055 need less force to close on a door with a strong closer?
The latchbolt is a two-piece mechanical design with an anti-friction insert, which reduces the force needed to close the door against the strike. That matters on classroom and corridor doors carrying heavy closers or positive pressure. Throw is 3/4 inch (19mm), with a deadlocking auxiliary latch behind it.
How fast can I get the Corbin Russwin ML2055-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 ML2055-LWA-626 come with a warranty?
Absolutely. The Corbin Russwin ML2055-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 ML2055-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 ML2055-LWA-626 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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