Corbin Russwin ML20907 Grade 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,838.27
$1,077.40
Corbin Russwin ML20907 No Cylinder Mortise Electrified Lever Lockset, PS-Princeton (Cast) Lever

Corbin Russwin ML20907 Grade 1 No Cylinder Mortise Electrified Lever Lockset, PS-Princeton (Cast) Lever

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Model: ML20907-PSA-626-SAF
From the ML2000 Series Collection
$1,838.27
$1,077.40
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,838.27
$1,077.40
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Corbin Russwin ML20907-PS ML2000 Series Mortise Electrified Lever Lockset with Princeton Cast Lever, Fail Safe/Fail Secure, ANSI/BHMA Grade 1

Commercial-Grade Electrified Mortise Security for High-Traffic, Demanding Environments

The Corbin Russwin ML20907-PS is part of the ML2000 Series, an ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1 mortise electrified lever lockset featuring the Princeton (Cast) lever design. Built for high-traffic and abusive environments, this lockset is constructed of heavy-gauge steel and supports Fail Safe/Fail Secure operation with field-reversible latchbolt handing. It accommodates door thicknesses from 1-3/8" to 4" and a standard backset of 2-3/4", making it highly adaptable across a wide range of commercial door applications. The unit is UL listed, UL10c compliant, UL-cUL listed for fire doors rated up to and including 3-hours, ADA compliant, and ASTM E330 certified.

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
  • Multi-Tenant Residential Properties

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locksets are engineered to meet and exceed ANSI/BHMA A156.13 Series 1000 Grade 1 requirements, constructed of heavy-gauge steel with patented features including EcoFlex® technology for up to 89% energy savings on electromechanical functions. The ML20907-PS is backed by a ten-year mechanical warranty, five-year MELR warranty, and two-year electrical warranty, and carries UL, UL10c, UL-cUL (3-hour fire door), ADA, ASTM E330, and Florida Building Code Windstorm certifications. Engineered for demanding commercial applications where dependable, code-compliant performance is 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-PSA-626-SAF – Frequently Asked Questions

1) What is the difference between the Fail Safe and Fail Secure versions of the Corbin Russwin ML20907?
You pick one at order time. Fail Safe unlocks the outside lever when power drops, which is what you want on a stair or egress-side opening where people have to get through in an outage. Fail Secure keeps the outside lever locked when power is lost, which is the choice for a server room, storeroom, or anywhere loss of power must not mean loss of security. Both are offered on the ML20907 with the PS Princeton cast lever in 626 satin chrome, so the mechanical side of the lock is identical either way.
2) Will the ML20907 mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset prep?
Yes. The ML20907 is built for the standard 1-3/4 inch commercial door and a 2-3/4 inch backset, which is the normal mortise prep on a hollow metal or solid core commercial opening. The lock case itself measures 5-7/8 by 4 by 15/16 inches with an 8 by 1-1/4 inch armored front, so it drops into a standard ANSI mortise pocket. Other door thicknesses from 1-3/8 up to 4 inches are available as options.
3) Does the ML20907 come with a cylinder, and can I use my existing keys?
No cylinder is supplied with the ML20907, so you order the cylinder separately. That is usually an advantage on a retrofit: it can be keyed into a new or existing Corbin Russwin key system, and the lock accepts most other manufacturers' cylinders, so a building already keyed to another brand can stay on one key. Corbin Russwin's own standard is a 6-pin L4 keyway, 0-bitted.
4) Do I have to order the ML20907 handed, or can it be reversed in the field?
Handing is not a problem here. The latchbolt is field reversible using Corbin Russwin's Quick Reversible design, so you re-hand it without taking the lock case apart. For a locksmith carrying stock that means one lock covers left and right hand openings.
5) Can I use this electrified mortise lock on a 3-hour fire rated door?
Yes. The ML20907 is UL and cUL listed under UL10C positive pressure for fire doors rated up to and including 3 hours, covering single doors up to 4 by 10 feet and pairs up to 8 by 10 feet. It is also ADA compliant per A117.1, ASTM E330 tested, California State Fire Marshal accepted, and windstorm/hurricane certified for Florida Building Code work.
6) Will the ML20907 latch into the strike already in my frame?
It ships with an ANSI straight lip strike, 4-7/8 by 1-1/4 inches with 1-1/8 inch lip to center, so if your frame carries a standard ANSI mortise strike prep the new strike drops straight in. The two-piece anti-friction latchbolt throws 3/4 inch (19mm) with a 9/16 inch deadlocking auxiliary latch, and the stainless deadbolt throws 1 inch, so strike pocket depth for a standard ANSI cutout is what you need to confirm on an odd frame.
7) What is the closest cross-brand equivalent to the Corbin Russwin ML20907 electrified mortise lockset for an access-control opening?
The Schlage L9092EU with 03A trim is the nearest peer: it is a heavy-duty mortise lock with an electrically controlled outside lever, keyed outside, request-to-exit switch, and 12/24VDC operation for 1-3/4 inch doors. The ML20907 is an ML2000 Series mortise electrified lever lockset offered in both Fail Safe and Fail Secure configurations, with or without request-to-exit monitoring, on a 2-3/4 inch backset. Both address the same job of releasing a lever from an access control panel; the Corbin Russwin is ordered as a single model configured either fail safe or fail secure, while the Schlage part number fixes the electrically unlocking configuration.
8) What is the Request to Exit option on the ML20907 and do I need it?
Request to exit monitoring is a switch inside the lock that signals your access control panel when someone turns the inside lever to leave. Order it as Yes if the panel has to shunt a door contact or suppress an alarm on legitimate egress, which is typical on monitored perimeter and secured corridor openings. If the door is only electrically controlled from the outside and nothing needs to know about egress, the No option is fine. Both are available with every rose and escutcheon choice on the PS lever.
9) What trim choices do I have on the ML20907 Princeton lever, rose or escutcheon?
Four trim configurations on the PS Princeton cast lever: A rose, B rose, M escutcheon and N escutcheon, all in 626 satin chrome. Roses are the smaller round plates and are the usual pick for matching existing sectional trim; the M and N escutcheons are the full-length plates and are what you want if you are covering an older prep or specifying a status indicator, since indicator options are offered on sectional and escutcheon trim. All trim is thru-bolted for alignment and added pull resistance.
10) I need an electrified mortise lock but my building is keyed Schlage. What are my options?
The ML20907 itself accepts most other manufacturers' cylinders, so a Schlage-keyed building can often stay on one key with a Corbin Russwin lock body. If you would rather keep the whole lock in the same brand family, the Schlage L9092EU with 03A lever trim is an electrically unlocked mortise lock with keyed outside and request to exit, 12/24VDC, in 626 for 1-3/4 inch doors. BEST also offers the 45HW wired electromechanical mortise lock with 12V/24V operation as a heavy duty alternative.
11) Is an electrified mortise lock the right choice, or should I use a standalone electronic lock instead?
An electrified mortise lock like the ML20907 has no keypad or reader of its own, it is wired back to an access control panel and switched by that system. Choose it where you already have, or are installing, a card or credential system and need central control, audit at the panel, and fail safe or fail secure behavior on power loss. If there is no panel and no wiring path, a standalone unit is simpler: the Alarm Lock DL3500CR Trilogy is a Grade 1 electronic mortise lock with 300 user codes and classroom function for 1-5/8 to 1-7/8 inch doors, and the Schlage CO-100-MS keypad mortise lock is a Grade 1 standalone for 1-3/4 inch doors. Those are battery and keypad based, so no power run to the door.
12) Is the ML20907 heavy duty enough for a school or hospital corridor that gets constant use?
It is built for that kind of traffic. Heavy-gauge steel case, ANSI/BHMA A156.13 Series 1000 Operational and Security Grade 1, and UL cycle testing recorded at 14.5 million cycles. The anti-friction two-piece latch takes less force to close the door, which matters on an opening with a closer that gets hit hundreds of times a day. Corbin Russwin also offers Behavioral Health trim (BHSS/BLSS) in the ML2000 trim range if the application needs a ligature resistant lever.
13) I only need a mechanical Grade 1 mortise lock, not an electrified one. What should I look at?
If there is no access control on the door, skip the electrified body and its power run. Mechanical Grade 1 mortise options include the Cal-Royal NM8080 storeroom lockset with interchangeable core option and the NM8070 classroom lockset, both for 1-3/4 inch doors, the Accentra 8805FL storeroom lock with Arcadia lever from the 8800 Series, and the Sargent 7925 dormitory exit function lock with rose trim and single cylinder deadbolt. Pick by function, since a mechanical lock's behavior is fixed at the lock, not at a panel.
14) What is the difference between the ML20907 and a wireless mortise lock like the Schlage LEMD-GRW?
The Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and mobile-enabled deadbolt with LED on Greenwich trim, right hand, with a 3 hour fire rating. It communicates wirelessly and reads credentials at the lock. The ML20907 is a hardwired ML2000 Series electrified mortise lever lockset, Grade 1 per A156.13 Series 1000, offered Fail Safe or Fail Secure with optional request-to-exit monitoring, and it is field reversible for handing rather than ordered handed.
15) Which mortise products look like alternatives to the ML20907 but will not work as one?
Several mortise-family items serve different purposes. The Sargent 130KB and 130W are mortise thumbturns, trim pieces rather than locksets. The Sargent 4874 is a double cylinder mortise deadbolt on a 2-3/4 inch backset with no latch or lever function. The Schlage L0170 is a half dummy trim, non-keyed, and the Emtek 3102 Memphis and 3106 Manhattan are dummy mortise entrance locksets with no latching function. The Kaba Ilco BR Series is a glass door bottom rail lock. The ML20907 is a complete electrified mortise lever lockset with a 3/4 inch latchbolt and Fail Safe or Fail Secure electrical operation.
16) For a behavioral health or ligature-resistant opening, is the ML20907 the right mortise lock?
The ML20907 is an ML2000 Series electrified mortise lever lockset with Princeton cast lever trim, and the ML2000 trim range includes Behavioral Health BHSS and BLSS designs. If the specification calls for a dedicated anti-ligature mechanical lockset instead, the TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, the MRX-A-01 is the same passage function with ligature resistant arch trim, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel.
17) Can I use the ML20907 on a 1-1/2 inch door, and what mortise locks suit thinner or nonstandard doors?
The ML20907 is built around a 1-3/4 inch door thickness with optional thicknesses available and a 2-3/4 inch backset. For thin ornamental iron doors, the Marks USA 21AC and 22AC entrance double cylinder mortise locks are listed for 1 inch door thickness. Baldwin mortise bodies take a different prep entirely, on a 2-1/2 inch backset, with the 6310 entry/storeroom listed for 1-3/8 inch and over and the 6301 entry/apartment for 1-3/4 inch and over, so they are not interchangeable with a 2-3/4 inch backset mortise pocket.
18) Does the ML20907 accept other manufacturers' cylinders, or do I need a separate lock for an existing key system?
The ML20907 is supplied without a cylinder and can be used with new or existing Corbin Russwin key systems, and it accepts most other manufacturers' cylinders, with a brass 6-pin L4 keyway cylinder 0-bitted as the standard offering. Peers handle this differently: the Cal-Royal NM8080 Grade 1 storeroom mortise lockset is offered with an interchangeable core option, and the Accentra nexTouch NTM623-NR is a Grade 1 mortise lock with a capacitive touchscreen keypad and cylinder override rather than a keyed-only cylinder path.
19) If I standardize on the ML2000 mortise body, can I change lock functions later without buying new locks?
Largely, yes. The ML2000 platform is multi-function: 12 functions are configurable from a single ML2054 lockbody, so a facility that standardizes on the series can change how an opening behaves without swapping the case out of the door. For an electrified opening needing high-force retraction, motorized electric latch retraction (MELR) is available on the ML20900 series.
20) What is a simpler mortise lock to pair with the ML20907 on the non-secured leaf of a pair?
Non-keyed mortise locks in the same 2-3/4 inch backset prep cover inactive or free-swinging leaves. The Hager 3810S is a Grade 1 passage mortise lock with rose and 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors, the 3810E is the same passage function with escutcheon, and the Schlage PM010 is a Grade 1 passage latch mortise lock, non-keyed, for 1-3/4 inch doors. The ML20907 remains the electrified leaf, Fail Safe or Fail Secure, with field reversible handing.
How fast can I get the Corbin Russwin ML20907-PSA-626-SAF delivered?
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Can I return it if it doesn’t work for me?
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Does the Corbin Russwin ML20907-PSA-626-SAF come with a warranty?
Absolutely. The Corbin Russwin ML20907-PSA-626-SAF 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 ML20907-PSA-626-SAF?
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