Corbin Russwin ML20907 Grade 1...
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$1,838.27
$1,077.40
Corbin Russwin ML20907 No Cylinder Mortise Electrified Lever Lockset, LS-Lustra Lever

Corbin Russwin ML20907 Grade 1 No Cylinder Mortise Electrified Lever Lockset, LS-Lustra Lever

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Model: ML20907-LSA-626-SAF
From the ML2000 Series Collection
$1,838.27
$1,077.40
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Corbin Russwin ML20907-LS ML2000 Series Mortise Electrified Lever Lockset with Lustra Lever, Fail Safe/Fail Secure, ANSI/BHMA Grade 1

Commercial-Grade Electrified Mortise Lockset with Motorized Electric Latch Retraction

The Corbin Russwin ML20907-LS is part of the ML2000 Series, an ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1 mortise lock engineered for high-traffic, abusive environments. Constructed of heavy-gauge steel and featuring the Lustra lever design, this electrified lockset supports Fail Safe/Fail Secure operation and integrates Motorized Electric Latch Retraction (MELR) technology that retracts the latchbolt in ½ second with applied power. Compatible with door thicknesses from 1-3/8" to 4" and a standard backset of 2-3/4", this lockset is UL listed, UL10c compliant, and rated for use on fire doors up to and including 3-hour fire ratings.

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

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Behavioral Health and Secure Care Facilities

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locksets are built to exceed ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1 requirements, constructed of heavy-gauge steel with patented features including EcoFlex® technology for up to 89% energy savings on electromechanical functions. The product is backed by a ten-year mechanical warranty, five-year MELR warranty, and two-year electrical warranty, and carries UL, UL10c, UL-cUL, ADA, ASTM E330, and Florida Building Code Windstorm certifications. Engineered for demanding commercial applications where dependable electrified performance and long-term reliability are essential.

Product Specs

Subcategory:
Mortise Locks
Product Group:
Mechanical Locks
Series:
ML2000 Series
Standard Latch:
3/4" Latchbolt
Standard Strike:
ANSI-Straight Lip,1-1/8" (29mm) Lip to Center
Product Subgroup:
Mortise Lockset
Product Type:
Mortise Locks
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Fail Safe/Fail Secure
Product Model:
ML20906
Collection:
ML2000 Series
Product Function:
Fail Safe/Fail Secure
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Product Substrate:
Steel
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Corbin Russwin ML20907-LSA-626-SAF – Frequently Asked Questions

1) Does the Corbin Russwin ML20907 mortise lockset come with a cylinder?
No cylinder is supplied with the ML20907-LS. You order the cylinder separately, which is what most locksmiths want anyway since it lets you key the lock into an existing Corbin Russwin system. The ML2000 lock case accepts Corbin Russwin cylinders (brass, 6-pin L4 keyway, 0-bitted as the standard offering) and will also take most other manufacturers' cylinders.
2) Will a Corbin Russwin ML20907 mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset?
Yes. 1-3/4 inches (44mm) is the standard door thickness for the ML2000 electrified mortise, and the backset is 2-3/4 inches, the usual commercial mortise backset. Optional thicknesses up to 4 inches are available, so thicker leaves and older 1-3/8 inch doors can be accommodated, but those are specified at order time rather than adjusted in the field.
3) What is the difference between the fail safe and fail secure versions of the ML20907?
It comes down to what the door does when power drops. Fail safe unlocks on loss of power, which is what you use on an egress path or a stair door that has to release in an alarm condition. Fail secure stays locked when power is lost, which is what you want on a secure storeroom, server room, or exterior opening. Both are orderable configurations of the ML20907-LS, so pick the one your life-safety drawings call for, because it is not changed after the fact.
4) How does motorized electric latch retraction work on this lockset, and why choose it over a standard electrified lever?
MELR pulls the latchbolt itself back electrically in about half a second when power is applied, so the door is free to push open without anyone turning the lever. That is what you want for automatic operators, ADA push-button openings, and high-traffic access-controlled doors. An electrified lever lock, by contrast, only controls whether the outside lever turns, so somebody still has to operate the handle. If the opening has an auto operator or a touchless actuator, the MELR version is the one to spec.
5) Is this Corbin Russwin electrified mortise lock approved for a 3-hour fire door?
Yes. The ML2000 electrified mortise is UL and cUL listed, UL10C positive pressure, and rated for fire doors up to and including 3 hours, covering single doors to 4 ft x 10 ft and pairs to 8 ft x 10 ft. It also carries ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, ADA A117.1, California State Fire Marshal listing, and windstorm/hurricane certification per ASTM E330 and the Florida Building Code, which is the package an institutional or hospital spec usually demands.
6) Will the ML20907 latch into the strike already in my frame?
The lock ships with an ANSI straight lip strike, 4-7/8 x 1-1/4 x 1-1/8 inches lip to center, and throws a 3/4 inch (19mm) two-piece anti-friction latchbolt plus a 9/16 inch deadlocking auxiliary latch. If your frame already has a standard ANSI 4-7/8 inch mortise strike prep, it drops straight in. Frames cut for a non-ANSI or short-lip strike will need the supplied strike fitted, and check your lip-to-center against 1-1/8 inches so the latch is not fouling the stop.
7) What is the closest alternative to a Corbin Russwin ML20907 motorized electric latch retraction mortise lock?
The Command Access ML190 Series motorized mortise lock is the nearest like-for-like we carry, a heavy-duty motorized mortise with field selectable EL/EU (fail secure or fail safe) operation on 24VDC, which means you set the failure mode on site rather than ordering it. For an electrified lever lock rather than latch retraction, the Schlage L9092EU with 03A trim in 626 gives you electric lock/unlock of the outside lever with request-to-exit monitoring on 12/24VDC for a 1-3/4 inch door, and the BEST 45HW wired electromechanical mortise runs 12V or 24V. Only the Command Access unit retracts the latch itself, so if the door has an automatic operator, that is the comparison that matters.
8) Can I use a standalone keypad or credential mortise lock instead of wiring in the ML20907?
Yes, if the opening only needs credential control at the door rather than integration with a panel. Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock with 300 user codes and classroom function for 1-5/8 to 1-7/8 inch doors; Dormakaba E-Plex E5086 is a Grade 1 electronic pushbutton and card mortise lock; TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID for a 1-3/4 inch door. The Corbin Russwin ML20907-LS differs in that it carries no reader of its own - it is a Fail Safe/Fail Secure electrified lockbody whose latch is released by a signal from the access control system.
9) What is the closest cross-brand equivalent to the Corbin Russwin ML20907 electrified mortise lockset?
The Schlage L9092EU electrified mortise lock with 03A trim is the nearest peer: it is a heavy duty mortise lock with an electric lock/unlock outside lever, keyed outside, request-to-exit switch, and 12/24VDC operation for a 1-3/4 inch door. The ML20907-LS is likewise a mortise electrified lockset with Fail Safe/Fail Secure function on a 2-3/4 inch backset, ordered with or without request-to-exit monitoring. The main difference is how the outside lever is controlled: the Schlage electrifies the lever, while the ML20907 uses Motorized Electric Latch Retraction that pulls the latchbolt back in half a second with power applied.
10) The opening does not need to be tied to an access control panel - what mechanical mortise lock should I order instead of the ML20907?
For a standalone keyed opening with no wiring, Accentra 8805FL is a Grade 1 storeroom mortise lock from the 8800 Series, and Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for a 1-3/4 inch door with an interchangeable core option. Either avoids the power supply, transfer hinge, and controller that the Corbin Russwin ML20907-LS requires as a Fail Safe/Fail Secure electrified lockset. Both peers are mechanical only, so there is no remote lock or unlock.
11) Is the Schlage LE Series mortise lock an equivalent to the Corbin Russwin ML20907?
Not on grade. The Schlage Electronics LEBMB-ADD mobile-enabled mortise lock is BHMA Grade 2, with a 3 hour fire rating, for a 1-3/4 inch door, and offers privacy, office, and apartment functions through a push button and LED. The Corbin Russwin ML20907-LS is an ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1 mortise lock. If the specification calls for Grade 1 on an electrified opening, the LE Series will not satisfy it.
12) For a classroom security opening, should I use the ML20907 or a dedicated classroom mortise lock?
If the door is controlled from a central system, the Corbin Russwin ML20907-LS gives you Fail Safe or Fail Secure operation with Motorized Electric Latch Retraction and optional request-to-exit monitoring. If the intent is lockdown from inside the room, Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset for a 1-3/4 inch door with an ANSI strike and steel escutcheon, TownSteel FME-4000 is an electronic intruder classroom mortise lockset with RFID, and BEST 45HCAINL is a heavy duty intruder function lockbody. Those act at the door itself rather than through a panel.
13) Do I need to order the ML20907 handed, or can it be reversed on site?
Handing is specified, but the ML2000 uses a patented quick-reversible latchbolt so it can be re-handed in the field without opening up the lock case. Useful if you are stocking spares across a building and do not want to carry both hands, or if a door swing changes mid-project.
14) What pocket size do I need to cut for this mortise lock body?
The heavy-gauge steel lock case measures 5-7/8 x 4 x 15/16 inches (149 x 102 x 24 mm) and the armored front is 8 x 1-1/4 inches. Trim spacing is 3-5/8 inches (92mm) center to center from lever to cylinder, and 2-7/16 inches (62mm) lever to thumbturn, so those are the hole centers to mark on the door face.
15) Should I use a rose or an escutcheon trim on this electrified mortise lock?
A rose (the A option) is the smaller round trim and is the plainer, easier retrofit where the door face is already drilled for sectional trim. The M and N escutcheons are full plates that cover more of the door face, which helps when you are replacing older trim and need to hide previous prep, and escutcheon trim is also what carries the ML2000 locked/unlocked status indicator options. All trim in the series is thru-bolted for alignment and pull-off resistance.
16) Can one ML2000 lock body cover several different door functions across my building?
Yes, and that is the argument for standardizing on it. The ML2054 multi-function lock body in the ML2000 line can be configured for 12 different functions, so a facility can stock one body and set it for office, storeroom, classroom and so on instead of carrying a separate lockcase per opening. The lock also keys into new or existing Corbin Russwin key systems, so the retrofit stays on your master key.
17) Is this lockset durable enough for a school or hospital corridor door?
It is built for exactly that traffic. The ML2000 is heavy-gauge steel, meets ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, and has been UL cycle tested to 14.5 million cycles (verification ID V875753), well past the Grade 1 requirement. The latchbolt uses an anti-friction insert so the door closes with less force, which matters on a closer-equipped corridor door, and the deadbolt is one-piece stainless with a 1 inch throw. Trim options extend to Behavioral Health (BHSS/BLSS) if you are working a secure care unit.
18) What does the request-to-exit option actually do, and do I need it?
Request-to-exit is an internal switch that signals your access control panel the moment someone turns the inside lever to leave. Without it, the panel sees the door open with no valid credential and logs a forced-door alarm. Order the RX version if the opening is monitored, alarmed, or tied into a door position switch. On an unmonitored door driven only by an operator, you can skip it. The ML20907-LS is offered both with and without RX on every trim and function combination.
19) I need a wired electrified mortise lock that runs on 12V or 24V - what else is comparable?
BEST 45HW Series is a wired electromechanical mortise lock rated heavy duty with 12V/24V operation, and it covers the same wired-access-control role as the Corbin Russwin ML20907-LS Fail Safe/Fail Secure electrified mortise lockset. The distinction is in the latch action: the ML20907 uses Motorized Electric Latch Retraction that withdraws the 3/4 inch latchbolt under power, which suits openings where the door must free-swing on a signal rather than only having the lever electrified.
20) Would a wireless mortise lock work in place of the ML20907 on a door where running wire is difficult?
Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating, right hand, Greenwich trim, which removes the need to pull wire to the door. The Corbin Russwin ML20907-LS takes the opposite approach: it is a wired Fail Safe/Fail Secure electrified lockset with Motorized Electric Latch Retraction, and it is field reversible for handing rather than being ordered handed like the right hand LEMD-GRW.
21) Will a BEST 45H mortise lockbody substitute for the ML20907?
No - the BEST 45HCAC is a heavy duty public entrance function mortise lock body with field reversible operation, and the 45HCAINL is a heavy duty intruder function lockbody. Both are mechanical lock bodies, so neither gives you the electrified operation the Corbin Russwin ML20907-LS provides as a Fail Safe/Fail Secure lockset with Motorized Electric Latch Retraction. The ML20907 shares the field reversible handing but is intended for an opening controlled by an access system.
22) My door is 2-1/2 inches thick - is the ML20907 still the right lock, or is there another option?
The Corbin Russwin ML20907-LS handles it: the ML2000 Series mortise lockset is stated compatible with door thicknesses from 1-3/8 inch to 4 inch, with 1-3/4 inch as standard. Among the mechanical alternatives, Hager 3800 Series mortise locks such as the 3810E passage and 3850E office cover 1-3/4 inch to 2-1/2 inch on a 2-3/4 inch backset, which matches the ML20907 backset but not its electrified Fail Safe/Fail Secure operation.
23) What should I order for a behavioral health opening instead of the ML20907 electrified lockset?
For ligature resistance, TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with passage function, MRX-A-01 is the arch trim version, and Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless. The Corbin Russwin ML20907-LS is also offered with Behavioral Health trim within the ML2000 Series, but as a Fail Safe/Fail Secure electrified lockset it requires power at the door, while the TownSteel and Marks USA units are mechanical passage devices.
24) Is a Baldwin 6310 mortise lock an alternative to the Corbin Russwin ML20907?
They are not interchangeable in the opening. Baldwin 6310 is an entrance/storeroom mortise lock body on a 2-1/2 inch backset for doors 1-3/8 inch and over, and the 6310190RRLS is the right hand reverse lever-by-lever version. The Corbin Russwin ML20907-LS uses a 2-3/4 inch backset, so the mortise pocket and cylinder centerline differ, and it is a Fail Safe/Fail Secure electrified lockset rather than a mechanical one.
25) What looks like a mortise lockset but will not work as a substitute for the ML20907?
Trim-only and dummy items. Schlage L0170 is a Grade 1 mortise non-keyed half dummy trim, Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan are dummy mortise entrance locksets, and Falcon MESC600DT is a dummy escutcheon lever trim for M9900 exit devices. Sargent 130KB and 130W are mortise thumbturns. None of those contain a working latch or an electrified lockbody, while the Corbin Russwin ML20907-LS is a complete Grade 1 mortise lockset with a 3/4 inch latchbolt and Fail Safe/Fail Secure operation.
26) Can I just add an electric mortise deadbolt rather than replacing the lock with an ML20907?
A deadbolt covers a different function. Alarm Lock DL4500 is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad for 1-5/8 to 1-7/8 inch doors, and Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset. Neither operates a latch or a lever. The Corbin Russwin ML20907-LS is a full lever lockset with a 3/4 inch latchbolt and an ANSI straight lip strike, so it both latches the door and releases on signal.
27) I need a non-keyed passage opening on the same door line as the ML20907 - what pairs with it?
For the passage and closet doors alongside a controlled opening, Falcon MA101 is a Grade 1 heavy-duty mortise passage lock with field reversible operation and a fire rating, Schlage PM010 is a Grade 1 passage latch mortise lock for a 1-3/4 inch door, and Hager 3810S is a passage mortise lock with rose trim on a 2-3/4 inch backset. The 3810S shares the 2-3/4 inch backset used by the Corbin Russwin ML20907-LS, which keeps the door prep consistent across the run.
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Does the Corbin Russwin ML20907-LSA-626-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20907-LSA-626-SAF is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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