Sargent 7837 Mortise Classroom...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,735.31
$945.75
Sargent 7837 Mortise Classroom Knob Lockset with Grade 1 Security

Sargent 7837 Mortise Classroom Knob Lockset with Grade 1 Security

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Model: 7837-OB-26D-LC
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,735.31
$945.75
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Sargent 7837 Mortise Classroom Knob Lockset with Grade 1 Security and Fire Rating

Professional Classroom Security Solution

The Sargent 7837 Mortise Classroom Knob Lockset delivers Grade 1 operational and security performance with patented design and construction. This mortise lock features an 8" x 1-1/4" front with 1" x 5/8" one-piece anti-friction reversible latch and 1-1/4 inch strike lip. ANSI/BHMA A156.13 Series 1000 certified and UL listed for fire doors and windstorm applications, providing reliable classroom security with outside trim locked at all times while inside trim always retracts latchbolt.

Professional Features & Benefits

  • Professional Dimensions: 8" x 1-1/4" front with 1-1/4 inch strike lip designed for standard mortise door preparation and reliable installation.
  • Grade 1 Performance: ANSI/BHMA A156.13 Series 1000 Operational Grade 1 and Security Grade 1 certification with all standard trims for maximum durability and security.
  • Patented Construction: Pre-assembled components with patented design make installation fool-proof while ensuring reliable long-term performance.
  • Anti-Friction Latch Design: 1" x 5/8" one-piece anti-friction reversible latch with auxiliary deadlatch provides smooth operation and enhanced security.
  • Classroom Function: Key outside retracts latchbolt with trim outside locked at all times, while trim inside always retracts latchbolt for proper classroom security protocol.
  • Fire-Rated Applications: UL and cUL listed with ANSI/UL 10C positive pressure fire test certification for fire doors and windstorm applications.
  • Manufacturer Warranty: 10 Year warranty coverage for added confidence and protection in demanding educational environments.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Educational Facilities and Classrooms
  • Commercial Office Buildings
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties
  • Fire-Rated Door Applications
  • Windstorm-Resistant Installations

Why Choose Sargent Quality?

Sargent mortise locksets deliver professional-grade reliability with patented design and construction rated for Grade 1 operational and security performance. 10 Year warranty coverage provides long-term protection for demanding commercial applications. Engineered for fire doors and windstorm applications where dependable classroom security and code compliance are essential.

Product Specs

Series:
7800 Series
Product Group:
Mechanical Locks
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Subcategory:
Mortise Locks and Trim
Commercial/Residential:
Commercial
Lock Function:
Classroom
Keyed Function:
Mortise Lock
Lock Type:
Mortise
Product Model:
7837
Product Function:
Classroom
Product Category:
Mechanical Locks
Department:
Door Hardware

Sargent 7837-OB-26D-LC – Frequently Asked Questions

1) How does the Sargent 7837 classroom function actually work on a classroom door?
The 7837 is a classroom function mortise lock, which means the outside knob stays locked at all times and is unlocked or the latch retracted only with a key from the outside. The inside knob always retracts the latchbolt, so anyone in the room can leave without a key. That is the standard classroom protocol: a teacher locks or unlocks the corridor side from the hallway with the key, and free egress is never blocked.
2) Can the Sargent 7837 mortise lock go on a labeled fire door?
Yes. The 7837 is UL and cUL listed and carries ANSI/UL 10C positive pressure fire test certification, so it is suitable for fire rated door openings. It is also listed for windstorm applications.
3) What size mortise front and strike does the Sargent 7837 need in the door prep?
The lock body uses an 8 inch by 1-1/4 inch front, which is the standard Sargent mortise pocket prep, and it ships with a 1-1/4 inch strike lip. The latch is a 1 inch by 5/8 inch one-piece anti-friction unit with an auxiliary deadlatch. If your existing pocket was cut for an 8 x 1-1/4 front, the 7837 drops into it.
4) Do I have to order the Sargent 7837 handed?
No. The latch is a one-piece anti-friction reversible type, so the same lock body serves either hand and you reverse it in the field rather than specifying left or right on the order.
5) What is the difference between the Sargent 7804 body only and the 7804-OB-LC?
The 7804 Body Only is the bare mortise lock case with no trim and no cylinder, which is what you buy when you are reusing existing knobs and roses or keeping a spare case on the shelf. The 7804-OB-LC comes less cylinder with O-rose and B-knob trim, so you get the knob and rose but still supply your own mortise cylinder to match your keying. Both are offered in 26D satin chromium plated over nickel.
6) Does the Sargent 7837 classroom lockset come with a cylinder?
No. Both configurations are supplied less cylinder, so you add a mortise cylinder in your own keyway and have it keyed into the building system. For a school standardizing on one master key, that is usually what you want anyway. Plan on a mortise cylinder with the correct cam for a Sargent mortise case.
7) Is the Sargent 7837 rated heavy enough for a school corridor?
It is certified to ANSI/BHMA A156.13 Series 1000 at Operational Grade 1 and Security Grade 1 with all standard trims. Series 1000 is the mortise lock standard and Grade 1 is the highest commercial tier, which is the level normally specified for education, healthcare and government corridor traffic.
8) We want a classroom lock the teacher can lock from inside the room during a lockdown. Does the 7837 do that?
The Sargent 7837 is keyed from the outside only; the inside trim always retracts the latchbolt and does not lock the corridor side. For inside-the-room securing, look at the Marks USA LA318GJ classroom security indicator mortise lockset, a Grade 1 lock for 1-3/4 inch doors with ANSI strike and a steel escutcheon, the BEST 45HCA heavy duty mortise lockbody with intruder function, or the TownSteel FME-4000 electronic intruder classroom mortise lock with RFID.
9) I need a classroom mortise lock with credential access instead of a key. What should I use?
For classroom function with electronic credentials, the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID, and the FME-4000 adds electronic intruder classroom operation with RFID; both are listed for 1-3/4 inch doors. Alarm Lock also offers keypad classroom mortise locks: the DL3500CR Grade 1 with 300 user codes and the DL2700CR Trilogy T2, both for 1-5/8 to 1-7/8 inch doors. The Sargent 7837 is a mechanical key-operated classroom lock with no electronic credential reading.
10) What is the closest mechanical Grade 1 classroom mortise lock to the Sargent 7837 from another manufacturer?
The Corbin Russwin ML2003 is the nearest straight equivalent: a Grade 1 mortise lockset in the ML2000 Series with classroom function, listed for 1-3/4 inch doors. The Cal-Royal NM8070 is another mechanical Grade 1 classroom mortise lockset with an auxiliary deadlatch for 1-3/4 inch doors. All three share the classroom operation the Sargent 7837 provides, where the key outside retracts the latchbolt and the inside trim always retracts it.
11) Does the Sargent 7837 work on an aluminum storefront door like an Adams Rite prep?
The Sargent 7837 uses an 8 inch by 1-1/4 inch front with standard mortise door preparation, which suits hollow metal and wood commercial doors rather than narrow aluminum stile preps. For aluminum storefront, the Alarm Lock DL1300NW Trilogy Networx wireless electronic mortise lock is built for Adams Rite deadlatches, and the Dormakaba E-Plex 2066 electronic pushbutton mortise lock is listed for wide stile.
12) If the classroom door needs to be released remotely from an access control panel, is the 7837 the right lock?
No. The Sargent 7837 is a mechanical classroom lock keyed from the outside with no electrical function. For remote release, the Command Access ML190 is a heavy-duty motorized mortise lock with field selectable fail safe or fail secure operation on 24VDC in storeroom function, the BEST 45HW is a wired electromechanical mortise lock with 12V/24V operation, and the Schlage L9092EU with 03A trim is an electric lock/unlock outside lever mortise lock with request to exit on 12/24VDC for 1-3/4 inch doors.
13) Is a knob or a lever better for a classroom lock?
The 7837 as configured here uses a B-knob on an O-rose. Knobs are still common on older school stock, but if your facility is standardizing to accessible hardware, a lever is the usual call. Cross-brand, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset, and the Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with auxiliary deadlatch, both for 1-3/4 inch doors.
14) I need the same Sargent 7800 body but a storeroom or office function instead of classroom. Can I use the 7837?
No, the function is built into the case. The 7837 is classroom only. Storeroom keeps the outside trim locked with the key retracting the latch and no way to leave it unlocked; office lets you leave the outside trim free during business hours. Cross-brand, the Accentra 8805FL is a Grade 1 storeroom mortise lock, the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset, and the Cal-Royal NM8050 is the Grade 1 office/entrance version.
15) Will the Sargent 7837 latch reliably into a misaligned frame on a door with a closer?
The latch is a one-piece anti-friction design, which reduces drag as the latch bolt hits the strike lip and helps the door pull in on a closer without sticking. The 1-1/4 inch strike lip carries the latch across the stop. There is also an auxiliary deadlatch that deadlocks the main latch when the door is closed, so the latch cannot be shimmed or loided from the corridor side.
16) The opening needs to stay locked to the outside at all times with no unlocking from inside the room. Is the 7837 right, or is there a better choice?
The Sargent 7837 classroom function keeps the outside trim locked at all times and requires the key to retract the latchbolt from outside, so it already suits a permanently secure corridor side. If you want that behavior in a storeroom-labeled lock instead, the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option.
17) Can I use a passage mortise lock in place of the Sargent 7837?
No. The Sargent 7837 is a keyed classroom lock where the key outside retracts the latchbolt and the outside trim stays locked. Passage mortise locks such as the Falcon MA101 Grade 1 heavy-duty passage lock, the Schlage PM010 Grade 1 passage latch, and the Hager 3810S Grade 1 passage lock with rose and 2-3/4 inch backset are non-keyed and never secure the opening. They fit similar mortise preps but provide latching only.
18) What is the difference between ordering the Sargent 7837 body only and buying a complete mortise lockset from another brand?
The Sargent 7837 is offered as a 7804 body only and as a 7804-OB-LC less cylinder with O-rose and B-knob, both in 26D satin chromium plated over nickel, so trim and cylinder are ordered around the body. Comparable peers sold as complete locksets include the Cal-Royal NM8070 Grade 1 classroom mortise lockset and the Corbin Russwin ML2003 Grade 1 classroom lockset. The BEST 45H series is likewise a mortise lock body, sold as a heavy duty public entrance lockbody with field reversible operation.
19) For a restroom or dorm room instead of a classroom, what mortise lock replaces the 7837?
The 7837 is a classroom-function lock and gives no inside privacy control. For privacy openings, the Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock with a 2-3/4 inch backset for 1-3/4 to 2 inch doors.
20) Which mortise lock should I spec for a fire-rated classroom door if not the 7837?
The Sargent 7837 is UL and cUL listed with ANSI/UL 10C positive pressure fire test certification for fire doors, so it already meets a fire-rated classroom opening. Among peers carrying a fire rating, the Falcon MA101 Grade 1 heavy-duty mortise lock is fire rated but is passage function, and the Schlage Electronics LEMD-GRW Grade 1 ENGAGE wireless mortise lock with 125kHz proximity reader carries a 3 hour rating.
21) Are Emtek mortise entrance locksets an alternative to the Sargent 7837?
They are not a substitute. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan mortise entrance locksets are dummy function, meaning no latching or keyed operation. The Sargent 7837 is a keyed classroom lock with a one-piece anti-friction reversible latch and auxiliary deadlatch, ANSI/BHMA A156.13 Series 1000 Grade 1.
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Does the Sargent 7837-OB-26D-LC come with a warranty?
Absolutely. The Sargent 7837-OB-26D-LC is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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