Marks USA 195RDB Classroom Int...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$407.21
$205.23
Marks USA 195RDB SFIC - Classroom Intruder Clutched Lever Lockset, Small Format IC, Less Core, 2-3/4in Backset, ANSI Strike, Grade 1,

Marks USA 195RDB Classroom Intruder Clutched Lever Lockset, Small Format IC, Less Core, 2-3/4" Backset, Grade 1

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Model: 195RDB/26D
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Marks USA 195RDB Classroom Intruder Clutched Lever Lockset — Small Format IC, Less Core, 2-3/4" Backset, Grade 1

The Marks USA 195RDB is a commercial-grade cylindrical Classroom Intruder Clutched Lever Lockset from the 195 Series, engineered for high-security educational and institutional environments. Featuring a unique stainless steel clutch mechanism and bronze roller bearings, this lockset exceeds BHMA Grade 1 specifications by 300%, achieving over 3.6 million cycles for unmatched long-term durability. Designed for Small Format Interchangeable Core (SFIC) applications and supplied less core, it accommodates a 2-3/4" backset and fits door thicknesses of 1-5/8" to 1-7/8" (use K1904 spacer for 1-3/8" doors). The 195RDB carries a 3-Hour Fire Rating and is UL Listed and ANSI/BHMA certified, making it a trusted solution for life-safety compliance.

Key Features

  • Exceeds BHMA Grade 1 by 300%: Tested to over 3.6 million cycles, far surpassing standard Grade 1 requirements for exceptional longevity in high-traffic applications.
  • Unique Clutch Mechanism: Stainless steel clutch disengages levers from the retractor when locked, allowing levers to swing freely — eliminating lever droop and dramatically reducing internal wear and abuse.
  • Cast Bronze Roller Bearings: Cylindrical lock chassis constructed with cast retractors on bronze roller bearings for smooth, durable operation over millions of cycles.
  • Door Thickness Compatibility: Fits doors 1-5/8" to 1-7/8" thick; K1904 spacer required for 1-3/8" doors. Supports both 2-3/8" and 2-3/4" backsets.
  • Latch Specifications: Latch #1834 with 1-1/8" x 2-1/4" front, 9/16" throw, and stainless steel nose for reliable deadlocking performance.
  • Solid Cast Zamac Levers: Levers feature solid cast zamac construction with 1/2" return, and thru-bolted roses at 3-7/16" diameter with spring-loaded 2-#10 thru-bolts for secure mounting.
  • ANSI Strike Included: Ships with Strike #1135, a 4-7/8" ASA curved lip strike for standard ANSI door prep compatibility.
  • 3-Hour Fire Rated: Meets 3-hour fire rating requirements for use in fire-rated door assemblies in commercial and institutional settings.
  • Marks Lifetime Mechanical Warranty: Backed by Marks USA's Lifetime Mechanical Warranty for long-term confidence and reduced total cost of ownership.

Certifications & Compliance

  • ANSI/BHMA Grade 1 — Exceeds by 300% (3.6 million cycles)
  • UL Listed
  • 3-Hour Fire Rated
  • ADA Compliant
  • Marks Lifetime Mechanical Warranty

Technical Specifications

  • Series: 195 Series
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • ANSI/BHMA: ANSI/BHMA, UL Listed
  • Commercial/Residential: Commercial
  • Function Description: Latch retracted by knobs/levers at all times
  • ADA Compliant: Yes
  • Latch Type Specification: Deadlocking
  • Product Category: Mechanical Locks
  • Department: Door Hardware

Typical Applications

  • K–12 Schools and Educational Facilities (Classroom Intruder / Lockdown Function)
  • Higher Education Campus Buildings
  • Healthcare and Hospital Institutions
  • Government and Municipal Buildings
  • Commercial Office Buildings
  • Multi-Tenant Residential and Mixed-Use Properties
  • Industrial and Warehouse Facilities

Why Marks USA 195RDB?

Marks USA 195 Series locksets are built to outperform industry standards, with the 195RDB's stainless steel clutch and bronze roller bearing chassis tested to over 3.6 million cycles — exceeding BHMA Grade 1 by 300%. Engineered for demanding commercial and institutional environments where security, durability, and life-safety compliance are non-negotiable, the 195RDB delivers a lower-maintenance, longer-lasting solution backed by a Lifetime Mechanical Warranty.

Manufacturer Resources

Marks USA Product Catalog

Product Specs

Series:
195 Series
Latch Throw:
9/16"
Grade:
Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Cylindrical Locks
Subcategory:
Cylindrical Locks
ANSI/BHMA:
ANSI/BHMA, UL Listed
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Function Description:
Latch retracted by knobs/levers at all times
Front Size:
1-1/8” x 2-1/4”
ADA Compliant:
Yes
Product Attribute:
Cylindrical Locks
Product Function:
Classroom
Latch Type Specification:
Deadlocking
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Marks USA 195RDB/26D – Frequently Asked Questions

1) Will the Marks USA 195RDB fit a 1-3/4 inch commercial door?
Yes. The 195RDB covers doors 1-5/8" to 1-7/8" thick, so a standard 1-3/4" commercial door lands mid-range with no spacer. For an older 1-3/8" interior door you need the K1904 spacer to make it up. It bores for a 2-3/4" backset and thru-bolts through the rose with 2-#10 spring-loaded bolts.
2) What does the classroom intruder function on the Marks 195RDB actually do during a lockdown?
A classroom intruder lock is keyed from inside the room, so a teacher locks the corridor side without stepping into the hallway. On the 195RDB the inside lever always retracts the latch, so egress is never blocked even when the outside is locked. It is supplied less core for small format interchangeable core, so your keying decides who can unlock it from the corridor.
3) The 195RDB ships less core - what cylinder do I have to order with it?
You supply the core. The 195RDB is built for Small Format Interchangeable Core and ships without one, so order SFIC cores in your facility keyway and keying (grand master, master, or keyed alike across the wing). That is deliberate on institutional jobs: the lock goes in and the school or campus locksmith cores it to the existing system.
4) Will the Marks 195RDB drop into my existing ANSI 161 door prep and strike?
It ships with Strike #1135, a 4-7/8" ASA curved lip strike, which is the standard ANSI frame prep on commercial openings. The latch is #1834 with a 1-1/8" x 2-1/4" front and a 9/16" throw, deadlocking, so if your frame already carries a 4-7/8" ASA strike and the door is bored 2-3/4" backset it goes back in without new prep.
5) Can I use the Marks 195RDB on a 90-minute or 3-hour fire rated classroom door?
The 195RDB carries a 3-hour fire rating and is UL Listed, so it is good on fire door assemblies up to and including 3-hour openings, which covers the 45, 60, and 90 minute doors below it. It is also ANSI/BHMA certified Grade 1 and ADA compliant, which is the other half of what a code official looks at on a classroom or corridor door.
6) My doors are 1-3/8 inch or thicker than 1-7/8 inch - what Grade 1 cylindrical lock works instead?
Outside 1-5/8" to 1-7/8", the 195RDB needs the K1904 spacer at 1-3/8" and will not cover thicker doors at all. For a wider range in Grade 1, the Dorma C150 covers 1-3/8" to 2-1/4" in entry/office and the Dorma C853 covers the same range keyed single cylinder. The Cal-Royal CAL20 and CAL30 span 1-3/8" to 2" in Grade 1 privacy and passage. None of those are classroom intruder function, so you lose the inside-key lockdown.
7) What is the closest equivalent to the Marks USA 195RDB for a classroom intruder opening that needs electronic credentials instead of a key?
The TownSteel XCE-9000 is a Grade 1 electronic classroom intruder cylindrical lockset with a keypad, fitting doors 1-3/4 inch to 2 inch. The Marks USA 195RDB is the mechanical route to the same classroom intruder function, a Grade 1 cylindrical lockset prepped for a small format interchangeable core and supplied less core, with a 2-3/4 inch backset. The XCE-9000 replaces the key with a code at the door; the 195RDB keeps credentialing in the keying system.
8) Which classroom lock works on a 1-3/4 inch door where RFID credentials are required?
The TownSteel FCE-4000 is a Grade 1 RFID electronic intruder classroom cylindrical lockset for 1-3/4 inch doors, and the FCE-2000 is a Grade 1 standalone motorized cylindrical lockset with RFID in the classroom function, also for 1-3/4 inch doors. Both read a card at the door. The Marks USA 195RDB covers the same classroom function mechanically and fits doors 1-5/8 inch to 1-7/8 inch, with a K1904 spacer for 1-3/8 inch doors.
9) What is the difference between the Marks USA 195RDB and the Schlage XE360M for a classroom door?
The Schlage XE360M is a Grade 1 wireless tubular lock with a smart mobile reader, offline push button function, in a classroom/storeroom function for 1-3/4 inch doors. The Marks USA 195RDB is a cylindrical lockset, Grade 1, classroom function, with a deadlocking latch carrying a 9/16 inch throw and a 1-1/8 inch by 2-1/4 inch front. A tubular chassis and a cylindrical chassis are different door preps, so the two are not interchangeable in an existing bore without confirming the prep.
10) Can an Orca OCL250 or a Dorma CL701 be used in place of a Marks USA 195RDB?
No. The Orca OCL250 is a Grade 2 medium duty entrance cylindrical lockset and the Dorma CL701 is a Grade 2 single dummy non-keyed lever lockset in the CL700 Series with a passage function. The Marks USA 195RDB is a Grade 1 classroom function lockset with a deadlocking latch. A dummy lever has no latch at all, and an entrance function does not provide classroom locking, so neither carries the function a classroom intruder opening is specified for.
11) Which electronic cylindrical locks accept the same small format interchangeable core keying as the Marks USA 195RDB?
The Alarm Lock Trilogy T2 DL2700 is a Grade 1 standalone electronic cylindrical lock with a digital keypad, 100 user codes, and IC/SFIC compatibility, fitting doors 1-5/8 inch to 1-7/8 inch. The BEST 9KZ EZ Series is an electronic keypad cylindrical lock with a key override function. The Marks USA 195RDB is prepped for a small format interchangeable core and ships less core, so a facility standardizing on one SFIC keyway can carry it across both mechanical and keypad openings.
12) What should be used on a classroom door that needs to report to an access control system rather than stand alone?
The Schlage NDEB is a Grade 1 heavy duty ENGAGE Series cylindrical lock with a 2.4 GHz Bluetooth Low Energy reader, mobile enabled and multi-function, for doors 1-5/8 inch to 2 inch. The Alarm Lock T3 DL3075 is a Grade 1 electronic cylindrical lock with an audit trail and keypad access. The Marks USA 195RDB is a mechanical Grade 1 classroom lockset and does not record or transmit door activity, so an opening with an audit or credential-management requirement is served by the electronic peers.
13) Why does the Marks 195 clutch matter on a high-abuse school door?
When the lock is secured, a stainless steel clutch disconnects the lever from the retractor, so a student hanging on the outside lever just spins it instead of loading the chassis. That is what kills lever droop, the most common failure on school corridor hardware. The chassis runs cast retractors on bronze roller bearings and tested past 3.6 million cycles, over three times the BHMA Grade 1 requirement.
14) Should I use a mechanical classroom intruder lock like the Marks 195RDB or go electronic?
Mechanical is the right call when you want no batteries, no programming, and no audit requirement, and when the room keys into an existing SFIC system. Go electronic if you need remote or credential lockdown and audit: ZenSupply carries the TownSteel XCE-9000 Series, a Grade 1 electronic classroom intruder cylindrical lockset with keypad for 1-3/4" to 2" doors, and the TownSteel FCE-4000 Series RFID electronic intruder classroom lockset for 1-3/4" doors. Those need power and a programming workflow the 195RDB does not.
15) Is the Marks 195RDB lever ADA compliant for a classroom door?
Yes, the 195RDB is ADA compliant. The lever operates without grasping or twisting and the inside lever always retracts the latch, so a single motion gets someone out of the room regardless of the lock state. The lever carries a 1/2" return, the detail that keeps clothing and mobility equipment from catching on the end of the lever.
16) Can I standardize a whole school on the Marks 195 Series and keep one key system?
Yes, and that is the case for it. The 195RDB is a bored cylindrical lock on a 2-3/4" backset with a 4-7/8" ASA strike, so every classroom door with standard ANSI prep takes the same lock. Less core means every opening gets a core from your existing small format system, and Grade 1 commercial rating with 3.6 million cycles carries the traffic on corridor doors. Order the same finish across the building, US26D or US10B.
17) If the door does not need to lock, what takes the place of a 195RDB in the same opening?
For an opening that only needs the latch held and released, the Cal-Royal CAL30 is a Grade 1 extra heavy duty passage lockset in the Calypso Series, fitting doors 1-3/8 inch to 2 inch. The Marks USA 195RDB is a classroom function lock for openings that must be secured from the corridor side; a passage lockset has no keyed control, so it is only a substitute where lockdown is not part of the requirement.
18) What Grade 1 lock covers a restroom or office door on the same project as the 195RDB classrooms?
For privacy openings, the Cal-Royal CAL20 is a Grade 1 extra heavy duty privacy lock in the Calypso Series for doors 1-3/8 inch to 2 inch. For entrance and office openings, the Dorma C150 is a Grade 1 heavy-duty cylindrical lock in the entry/office function for doors 1-3/8 inch to 2-1/4 inch, and the Dorma C853 is a Grade 1 entry keyed single cylinder lever lockset in the C800 Series. The Marks USA 195RDB carries the classroom function in that same Grade 1 tier.
19) Is the Alarm Lock DL4100 or the Schlage CO-100 an alternative to a 195RDB classroom lock?
They serve a different opening. The Alarm Lock Trilogy 4100 is a Grade 1 electronic cylindrical lock with a privacy function and keypad for doors 1-5/8 inch to 1-7/8 inch, and the Schlage CO-100 is a Grade 1 heavy duty standalone electronic cylindrical lock in the privacy function for 1-3/4 inch doors. Both are privacy locks. The Marks USA 195RDB is a classroom function lock, which is the function specified when a corridor door must be secured against entry rather than occupied-signaled.
20) What is the difference between the Marks USA 195RDB and the SDC Electra 7200 for a secured classroom?
The SDC Electra 7200 Series is a solenoid controlled cylindrical lock running on dual voltage 12/24VDC for doors 1-3/4 inch to 2 inch, so it is released by a remote signal and requires power and wiring to the door. The SDC E75 Series is battery powered with keypad access control for doors 1-3/4 inch to 2-1/8 inch. The Marks USA 195RDB is a mechanical classroom lockset with a 2-3/4 inch backset and needs no power at the opening.
21) Will a Kwikset SmartCode 912TNL work on a commercial classroom opening instead of a Marks USA 195RDB?
The Kwikset 912TNL ZW500 SmartCode is an electronic Tustin lever with Z-Wave technology, keyed one side, for doors 1-3/8 inch to 2 inch. The Marks USA 195RDB is a commercial Grade 1 classroom lockset that is UL Listed and ANSI/BHMA certified and ADA compliant. An opening specified to a commercial grade and fire-rated assembly is served by the 195RDB; the SmartCode is a keyed-one-side residential-style lever with home automation control.
22) Which lockset suits a thin door that the Marks USA 195RDB will not fit without a spacer?
The Lockey 1600 heavy duty mechanical keyless knob lock and the Lockey 2830 mechanical pushbutton keyless knob lock both fit doors 1-1/8 inch to 2 inch, and the 2830 carries an auto-locking passage function. The Marks USA 195RDB fits 1-5/8 inch to 1-7/8 inch and needs the K1904 spacer at 1-3/8 inch. Note that the Lockey units are knob locks with a keyless pushbutton, not a lever lockset, so ADA lever operation is not part of them.
23) How does the Stanley QCL150 compare with the Marks USA 195RDB on strike and latch prep?
The Stanley Security QCL150 is a Grade 2 entry lever in the QCL100 Series with a Sierra bent lever and rose, less cylinder, a square 2-3/4 inch backset latch and a 4-7/8 inch by 1-1/4 inch ASA strike. The Marks USA 195RDB also runs a 2-3/4 inch backset and ships with a 4-7/8 inch ASA curved lip strike, with a 1-1/8 inch by 2-1/4 inch latch front and 9/16 inch throw. The two differ in function and grade: the QCL150 is an entrance lever, the 195RDB is a Grade 1 classroom lockset.
24) What is the difference between the Marks USA 195RDB and the Accentra nexTouch NTB613 or CENTRIOS CEB100?
The Accentra nexTouch NTB613 is a Grade 1 cylindrical keypad lock with pushbutton entry in the nexTouch Series, and the CENTRIOS CEB100 is a Grade 1 smart Bluetooth cylindrical lock in the privacy function. Both credential at the door itself. The Marks USA 195RDB is a mechanical Grade 1 cylindrical classroom lockset supplied less core for a small format interchangeable core, so access stays under the building's key system rather than a code or phone.
25) What finishes does the Marks USA 195RDB lever lockset come in?
Two: US26D satin chrome and US10B oil-rubbed dark bronze. US26D is the usual institutional match on schools and healthcare corridors where the rest of the hardware is satin chrome or brushed stainless; US10B suits dark bronze door and frame packages. Levers are solid cast zamac with a 1/2" return on a 3-7/16" thru-bolted rose.
How fast can I get the Marks USA 195RDB/26D 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 Marks USA 195RDB/26D come with a warranty?
Absolutely. The Marks USA 195RDB/26D 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 Marks USA 195RDB/26D?
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
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