Schlage ND78 Grade 1 Double Cy...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$917.51
$578.03
Schlage ND78 Grade 1 Double Cylinder Classroom Security, Cylindrical Lock, Rhodes Lever, Less Cylinders, 2-3/4" Backset

Schlage ND78 Grade 1 Double Cylinder Classroom Security, Cylindrical Lock, Rhodes Lever, Less Cylinders, 2-3/4" Backset

(No reviews yet) Write a Review

Model: ND78-CD-RHO-626
From the ND-Series Collection
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$917.51
$578.03
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Schlage ND78 Grade 1 Double Cylinder Classroom Security, Cylindrical Lock, Rhodes Lever, Less Cylinders, 2-3/4" Backset

Schlage Lock Company ND Series

Beyond grade 1 performance is the hallmark of the mechanical and electrified ND series locks. These locks are put through extreme levels of testing and are proven to withstand 3,100 in-lb. of abusive lever torque-more than 2-1/2 times the grade 1 standard requirement. Offset lever pull testing up to 1,600 lbs. assures you of the lock’s superb resistance against pry bar attacks. More than strong, ND series is built to last and shows nearly zero droop or wobble after 16 million cycles. All ND series locks including electronic functions, ligature-resistant trims, and ground-breaking, high-visibility status indication trims use the common cylindrical ANSI 161L door preparation making them easily interchangeable. They are ideal for all new construction and retrofit applications where grade 1 strength and security are desired.

Features:

  • No access with minimum 3,100 in-lbs of lever torque (2.6x BHMA, for general abuse)
  • No access with minimum 1,600 lbs of offset lever pull (8x BHMA, for pry-bar attacks)
  • No access with minimum 100 vertical impacts (20x BHMA, for sledgehammer attacks)
  • Near-zero droop and wobble beyond 16 million cycles (after 16x BHMA) – without the use of set screws or O-rings
  • Latch retraction with up to 200 pound preload (4x BHMA) for confident operation in warped and preloaded doors
  • Cast steel spindle construction exceeding 16 million cycles
  • Withstood aggressive Schlage development testing including lever-snap and abusive cycling
  • 31 mechanical functions
  • 6 wired functions with:
    • Autodetecting 12-24V DC input
    • Switch-selectable EL/EU operation
    • Modular request to exit (RX)
    • 0.230A max/0.010A holding current
  • Available in 10 finishes, 5 lever designs, and 2 rose designs
  • Multiple key systems available – open, patented, restricted, geographic exclusive, UL437
  • Support for 10 non-Schlage cylinders including Best, Corbin Russwin, Medeco, Sargent and Yale
  • Certifications: Exceeds BHMA A156.2 requirements for grade 1 cylindrical locks. Exceeds BHMA A156.25 requirements for indoor electrified locks.

 

Specifications:

  • Material: Modular design of zinc and steel components plated for corrosion protection
  • Door thickness: Standard: 1-5⁄8" (41 mm) to 2-1⁄8" (54 mm) Optional: 1-3⁄8“ (35 mm) - 6" (152 mm) EE, EO, EI, ED configurations
  • Handing: Non-handed
  • Backset: Standard: 2-3⁄4" (70 mm). Optional: 2-3⁄8", 3-3⁄4”, 5” (60, 92, 127 mm)
  • Latch bolt: Standard: 1⁄2" (12 mm) throw spring latch or deadlatch (stainless steel). Optional: 3⁄4" (19 mm) throw anti-friction deadlatch available for pairs of doors
  • Strike: Standard: ANSI curved lip: 1-1⁄4" x 4-7⁄8" x 1-3⁄16" (32 mm x 124 mm x 30 mm). Optional: T Strike, ANSI strikes with alternative lip lengths, dust box options.
  • Keying Formats:
    • Standard: 6-pin Conventional cylinder with two patented keys
    • Optional: FSIC, SFIC, and 7-pin SL cylinder formats plus less cylinder options made to fit non-Schlage cylinders from Best, Corbin Russwin, Medeco, Sargent and Yale.
  • Access security:
    • Standard: 6-pin, patented Everest 29 S123 keyway
    • Optional: Open, restricted, Primus, master keying, and construction keying
  • Input voltage: Autodetecting 12-24V DC, +/- 10%
  • Operating mode: Fail safe or fail secure via switch on chassis
  • Current draw: 0.23 amps maximum; 0.01 amps holding
  • Request to Exit: Modular - 3A @ 125VAC / 2A @ 30VDC
  • Wired electrified:
  • Warranty: 10years mechanical, 1 year wired electrified.

 

Lever Styles:

  • ATH: Athens Width: 4.56". Projection: 3.31"
  • BRK: Boardwalk Width: 4.94". Projection: 3.06"
  • BRW: Broadway Width: 4.50". Projection: 3.06"
  • LAT: Latitude Width: 4.50". Projection: 3.13"
  • LON: Longitude Width: 4.94". Projection: 3.13"
  • OME: Omega Width: 5.06". Projection: 3.31"
  • RHO: Rhodes Width: 4.56". Projection: 2.94"
  • SPA: Sparta Width: 4.94". Projection: 3.50"
  • TLR: Tubular Width: 4.94". Projection: 3.00"
  • Rose Standard: Diameter: 3.44"
  • Return to door meets 1⁄2" requirement for Boardwalk (BRK), Longitude (LON), Omega (OME), Rhodes (RHO), Sparta (SPA) and Tubular (TLR) levers.

 

Mechanical Non-Keyed Functions:

  • ND10: Passage latch
    • ANSI F75
    • Levers both sides; springlatch
    • Latch retracted by lever from either side at all times
    • Inside lever always free for immediate egress
  • ND12: Exit lock
    • ANSI F89
    • Levers both sides; deadlatch
    • Outside lever always fixed; latch retracted by inside lever
    • Inside lever always free for immediate egress
  • ND25: Exit lock with exterior blank plate
    • Blank plate outside; lever inside; deadlatch
    • Latch retracted by inside lever
    • Inside lever always free for immediate egress
  • ND30: Patio lock
    • ANSI F77
    • Lever outside; push button in lever inside; springlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button on inside lever
    • Rotating inside lever retracts latch and releases button unlocking outside lever; closing door also unlocks preventing lockout
    • Inside lever always free for immediate egress
  • ND40: Bath/bedroom privacy lock
    • ANSI F76
    • Lever with emergency release recessed slot outside; push button in lever inside; springlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button on inside lever
    • Rotating inside lever retracts latch and releases button unlocking outside lever; closing door also unlocks preventing lockout
    • Emergency unlock: an emergency key (sold separate) or small, flat screwdriver inserted in outside lever and turned releases button to unlock
    • Inside lever always free for immediate egress
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacer kits allow application to doors 1-3/8" to 1-11/16".
    • To order an emergency key use part number 35-270
  • ND44: Hospital privacy lock
    • Emergency turn in lever outside; push button in lever inside; springlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button on inside lever
    • Rotating inside lever retracts latch and releases button unlocking outside lever; closing door also unlocks preventing lockout
    • Emergency unlock: rotating emergency turn in outside lever releases button to unlock
    • Inside lever always free for immediate egress
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacer kits allow application to doors 1-3/8" to 1-11/16".
  • ND45: Time out lock with Vandlgard
    • Spring-loaded push button in lever outside; lever inside; springlatch
    • In unlocked state latch is retracted by either lever
    • Caretaker side:pushing and holding button enables Vandlgard® feature; detention side lever will rotate without engaging latch
    • Releasing manually held button enables inside lever to re-engage with latch and open the door
  • ND170: Single dummy trim
    • Fixed lever one side only; no latch or chassis
    • Used for door pull or matching inactive trim
  • ND172: Double dummy trim
    • Fixed levers-both sides; no latch or chassis
    • Used for door pull or matching inactive trim
    • Note: Latch cover plates available. Order part number 47269199.

 

Mechanical Keyed Functions:

  • ND25 x 70: Classroom exit lock
    • ANSI F113
    • Blank plate outside; lever with cylinder inside; deadlatch
    • In unlocked state latch is retracted by inside lever
    • Outside always secure; inside lever is made inoperative by key inside
    • Key inside retracts latch and unlocks inside lever
  • ND25 x 80: Storeroom exit lock
    • ANSI F112
    • Blank plate outside; lever with cylinder inside; deadlatch
    • Outside always secure; inside lever is always fixed
    • Key inside retracts latch but does not unlock lever
  • ND50: Entrance/office lock
    • ANSI F82
    • Lever with key cylinder outside; push button in lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button on inside lever; key outside does not lock
    • Key outside or rotating inside lever retracts latch and releases button unlocking outside lever
    • Inside lever always free for immediate egress
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacer kits allow application to doors 1-3/8" to 1-11/16".
  • ND53: Entrance lock
    • ANSI F109
    • Lever with key cylinder outside; push/turn button in lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button or pushing and turning button on inside lever; key outside does not lock
    • Pushed button unlocking: key outside or rotating inside lever retracts latch and releases button unlocking outside lever Pushed/turned button unlocking: key outside or rotating inside lever retracts latch but does not unlock outside lever; rotate inside button to start position to allow button release and unlocking by key or by rotating inside lever
    • Inside lever always free for immediate egress
    • Caution: Egress without fully releasing the push/turn button can result in lock-out situations.
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacer kits allow application to doors 1-3/8" to 1-11/16".
  • ND60 with XN12-001: Vestibule lock with interior unlocking only
    • Lever outside; lever with key cylinder inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is locked or unlocked by key inside
    • Inside lever always free for immediate egress
  • ND70: Classroom lock, exterior lockdown only
    • ANSI F84
    • Lever with key cylinder outside; lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is locked or unlocked by key outside
    • Inside lever always free for immediate egress
  • ND73: Corridor lock
    • ANSI F90
    • Lever with key cylinder outside; push button in lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button on inside lever or by key outside
    • When locked by pushed button: rotating inside lever retracts latch and releases button unlocking outside lever; closing door also unlocks preventing lock-out When locked by key: rotating inside lever retracts latch but outside lever remains fixed until unlocked by key outside
    • Inside lever always free for immediate egress
  • ND80: Storeroom lock
    • ANSI F86
    • Lever with key cylinder outside; lever inside; deadlatch
    • Outside lever always fixed; latch retracted by inside lever
    • Key in outside lever retracts latch only
    • Inside lever always free for immediate egress
  • ND81: Accessible storeroom lock
    • ANSI F86
    • Lever with key cylinder outside; lever inside; deadlatch
    • Outside lever is always fixed when key is not present; latch retracted by inside lever
    • Key outside turned counter-clockwise retracts latch; 180-degree clockwise rotation of key allows outside lever to retract latch
    • Inside lever always free for immediate egress
  • ND85: Faculty restroom lock
    • ANSI F93
    • Lever with conventional indicator cylinder outside; push button in lever inside; deadlatch
    • Entrance by key only; outside lever always fixed; latch retracted by inside lever
    • Push button on inside lever activates a locking pin that extends from the cylinder face to prohibit use of operating keys and indicate that the room is in use
    • Turning inside lever or closing door releases the locking pin and push button to allow normal use of operating keys
    • Emergency unlock: use of an emergency key (sold separate) is required to override the locking pin and unlock from the outside when push button is activated
    • Inside lever always free for immediate egress
    • Note: Available with Conventional KIL indicator cylinder only. To order a spanner key to enable lockout feature use part number 35-251.
    • To order an emergency key use part number 35-102.
  • ND91: Vandlgard entrance/office lock
    • ANSI F82
    • Lever with key cylinder outside; push button in lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside is made inoperative by pushing button on inside lever; key outside does not lock, Vandlgard allows outside lever to rotate freely when locked
    • Key outside or rotating inside lever retracts latch and releases button unlocking outside lever
    • Inside lever always free for immediate egress
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacer kits allow application to doors 1-3/8" to 1-11/16".
  • ND92: Vandlgard entrance lock
    • ANSI F109
    • Lever with key cylinder outside; push/turn button in lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button or pushing and turning button on inside lever; key outside does not lock, Vandlgard® allows outside lever to rotate freely when locked
    • Pushed button unlocking: key outside or rotating inside lever retracts latch and releases button unlocking outside lever Pushed/turned button unlocking: key outside or rotating inside lever retracts latch but does not unlock outside lever; rotate inside button to start position to allow button release and unlocking by key or by rotating inside lever
    • Inside lever always free for immediate egress
    • Caution: Egress without fully releasing the push/turn button can result in lock-out situations.
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacerkits allow application to doors 1-3/8" to 1-11/16".

 

Mechanical Keyed Functions:

  • ND94: Vandlgard classroom lock, exterior lockdown only
    • ANSI F84
    • Lever with key cylinder outside; lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is locked or unlocked by key outside; Vandlgard allows outside lever to rotate freely when locked
    • Inside lever always free for immediate egress
  • ND96: Vandlgard storeroom lock
    • ANSI F86
    • Lever with key cylinder outside; lever inside; deadlatch
    • Outside lever always inoperative; Vandlgard allows outside lever to rotate freely when locked
    • Key in outside lever retracts latch only
    • Inside lever always free for immediate egress
  • ND97: Vandlgard corridor lock
    • ANSI F90
    • Lever with key cylinder outside; push button in lever inside; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by pushing button on inside lever or by key outside; Vandlgard allows outside lever to rotate freely when locked
    • When locked by pushed button: rotating inside lever retracts latch and releases button unlocking outside lever; closing door also unlocks preventing lock-out When locked by key: rotating inside lever retracts latch but outside lever remains fixed until unlocked by key outside
    • Inside lever always free for immediate egress

 

Mechanical Keyed, Double Cylinder Functions:

  • ND60: Vestibule lock
    • ANSI F88
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by key inside; key outside does not lock
    • Key outside retracts latch but cannot unlock outside lever; only key inside unlocks
    • Inside lever always free for immediate egress
    • Note: Available with optional instruction rose identifying key rotation direction for rapid lockdown. 626 finish only.
    • To order with instruction rose specify function and note XN12-035 as a special option
  • ND66: Store lock
    • ANSI F91
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state latch is retracted by either lever
    • Key in either lever locks or unlocks both levers
    • Caution: Double cylinder locks on any door, in any structure which is used for egress are a life safety hazard in times of emergency and their use is not recommended. Installation should be in accordance with existing codes only.
  • ND70 x 80: Classroom by storeroom lock
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state inside lever is always fixed; latch retracted by outside lever
    • Outside lever is locked or unlocked by key outside; key inside retracts latch but does not unlock either lever
    • Caution: Double cylinder locks on any door, in any structure which is used for egress are a life safety hazard in times of emergency and their use is not recommended. Installation should be in accordance with existing codes only
  • ND72 with XN12-002: Communicating lock
    • ANSI F80
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state latch is retracted by either lever
    • Key in either lever makes inoperative only that lever
    • Key in either lever retracts the latch and unlocks only that lever
    • Caution: Double cylinder locks on any door, in any structure which is used for egress are a life safety hazard in times of emergencyand their use is not recommended. Installation should be in accordance with existing codes only.
    • To order, specify function and note XN12-002 as a special option.
  • ND72 with XN12-003: Vandlgard communicating lock
    • ANSI F80
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state latch is retracted by either lever
    • Key in either lever makes inoperative only that lever; Vandlgard allows locked lever to rotate freely when locked
    • Key in either lever retracts the latch and unlocks only that lever
    • Caution: Double cylinder locks on any door, in any structure which is used for egress are a life safety hazard in times of emergency and their use is not recommended. Installation should be in accordance with existing codes only.
    • To order, specify function and note XN12-003 as a special option.
  • ND78: Classroom security lock (180-degree lockdown)
    • ANSI F110
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by rotating key in either lever 180 degrees counterclockwise and returning to start position
    • Unlock outside lever by rotating key 180 degrees clockwise in either lever and returning to start position
    • Inside lever always free for immediate egress
    • Locks ordered in 626 finish come standard with instruction rose (47342586) identifying key rotation direction for rapid lockdown. Other finishes receive a standard rose.
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacer kits allow application to doors 1-3/8" to 1-11/16".
  • ND82: Institution lock
    • ANSI F87
    • Lever with key cylinder both sides; deadlatch
    • Both levers are always fixed
    • Key in either lever retracts latch only
    • Caution: Double cylinder locks on any door, in any structure which is used for egress are a life safety hazard in times of emergency and their use is not recommended. Installation should be in accordance with existing codes only.
  • ND93: Vandlgard vestibule lock
    • ANSI F88
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by key inside; key outside does not lock; Vandlgard allows outside lever to rotate freely when locked
    • Key outside retracts latch but cannot unlock outside lever; only key inside unlocks
    • Inside lever always free for immediate egress
    • Note: Available with optional instruction rose identifying key rotation direction for rapid lockdown. 626 finish only.
    • To order with instruction rose specify function and note XN12-035 as a special option.
  • ND98: Vandlgard classroom security lock (180-degree lockdown)
    • ANSI F110
    • Lever with key cylinder both sides; deadlatch
    • In unlocked state latch is retracted by either lever
    • Outside lever is made inoperative by rotating key in either lever 180 degrees counterclockwise and returning to start position; Vandlgard allows outside lever to rotate freely when locked
    • Unlock outside lever by rotating key 180 degrees clockwise in either lever and returning to start position
    • Inside lever always free for immediate egress
    • Locks ordered in 626 finish come standard with instruction rose (47342586) identifying key rotation direction for rapid lockdown. Other finishes receive a standard rose.
    • Note: Locks ordered with indicator trim fit 1-3/4" doors. Sold separate spacer kits allow application to doors 1-3/8" to 1-11/16".

Finishes:

  • 605/US3 - Bright brass
  • 606/US4 - Satin brass
  • 612/US10 - Satin bronze
  • 613/US10B - Oil rubbed bronze
  • 619/US15 - Satin nickel
  • 622/US19 - Matte black
  • 625/US26 - Bright chrome
  • 626/US26D - Satin chrome
  • 626AM - Satin chrome, antimicrobial
  • 643e/716 - Aged bronze

Manufacturer Resources

Product Specs

Series:
ND Series
Grade:
Grade 1
Duty Level:
Heavy Duty
Handle Type:
Lever
Keyed Function:
Double Cylinder
Standard Latch:
13-247: Deadlatch - 2-3/4" Backset - Square corner, 1-1/8" x 2-1/4"
Standard Strike:
10-025: ANSI, no box, 1-1/4" x 4-7/8" (1-3/16" Lip length)
Subcategory:
Cylindrical Lever Locks
ANSI/BHMA:
F110
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Leversets
Keyed:
Yes
Electronic:
No
Commercial/Residential:
Commercial
Function Description:
Both levers fixed. Entrance by key in either lever.
Lock Type:
Cylindrical
Lock Function:
Classroom Security (180-Degree Lockdown)
Product Attribute:
Cylindrical Locks
IMAP Policy:
Yes
Product Model:
ND78
Collection:
ND-Series
Product Function:
Classroom Security
Door Hand Direction:
Non-Handed
Product Substrate:
Zinc and Steel
Product Category:
Mechanical Locks
Department:
Door Hardware

Schlage ND78-CD-RHO-626 – Frequently Asked Questions

1) How does the Schlage ND78 classroom security lock actually lock down a classroom door?
The ND78 has a key cylinder in both levers. A teacher inside rotates the key 180 degrees counterclockwise and returns it to the start position, which makes the outside lever inoperative, so nobody can enter without a key. Rotating the key 180 degrees clockwise the same way unlocks it again. The inside lever always retracts the latch for immediate egress, so the room can be locked without anyone stepping into the corridor. It is the ANSI F110 classroom security function.
2) Does the ND78 ship with cylinders, or do I have to order them separately?
This ND78 is the less-cylinder version, so the two cylinders are not included and must be supplied or ordered separately. The chassis accepts Schlage conventional 6-pin, FSIC, SFIC and 7-pin SL formats, and the less-cylinder build is also made to fit non-Schlage cylinders from Best, Corbin Russwin, Medeco, Sargent and Yale, which is how facilities keep the lock on an existing master key system.
3) Do I need to order the ND78 handed, and will it work on either door swing?
No handing to specify. The ND78 is non-handed, so the same lock works on a left or right hand door and you do not need to know the swing before you order.
4) Is the ND78 a double cylinder lock, and is that a life safety problem on an egress door?
It is a double cylinder lock, keyed in both levers, but unlike the other double cylinder ND functions it keeps the inside lever always free for immediate egress. That is the difference between the ND78 and functions like the ND66 store lock, ND82 institution lock or ND70 x 80, where both levers can be fixed and Schlage warns against use on egress doors. If you need free egress from inside, the ND78 is the double cylinder function that provides it.
5) Can I swap an existing ND series lock on the door for an ND78 without redoing the prep?
Yes. Every ND series lock, mechanical, electrified, ligature-resistant trim and indicator trim, uses the common cylindrical ANSI 161L door preparation, so they are interchangeable in the same opening. Changing a corridor ND73 or storeroom ND80 over to an ND78 for classroom lockdown is a chassis and trim swap, not a new door prep. Confirm the backset matches, since the standard latch here is 2-3/4 inch.
6) What is the closest equivalent to the Schlage ND78 classroom security lock from another manufacturer?
The Dexter C1000 Series classroom security cylindrical lever lock is the nearest match. Like the ND78, it is a Grade 1 keyed cylindrical lever lock built for the classroom security function, where the lock is secured by key without opening the door. The Dexter C1000 classroom security lock lists a door thickness range of 1-3/8 inch to 1-3/4 inch and uses a clutching lever, while the ND78 is a non-handed Grade 1 cylindrical lock carrying ANSI/BHMA F110.
7) Is a double-keyed institution lock the same thing as the ND78 classroom security lock?
No. The ND78 keeps the inside lever always free for egress and uses the key only to lock or unlock the outside lever. An institution or asylum function keeps both levers fixed at all times so a key is required from either side to get in or out. The Dexter C1000 Series asylum lock is the Grade 1 version of that function, carrying ANSI F87 with a 1-3/8 inch to 2 inch door thickness range, and the Arrow MK33-BD-CS is a Grade 2 asylum cylindrical lock with a ball knob and Schlage C keyway. Those are appropriate only where code permits keyed egress.
8) What is the difference between the Schlage ND70 classroom lock and the ND78 classroom security lock?
The ND70 (ANSI F84) is keyed on the outside only, so the door can only be locked from the corridor side with a key. The ND78 (ANSI F110) has cylinders in both levers, so staff can lock the outside lever from inside the room with a 180-degree key turn. If your goal is lockdown from inside the classroom, the ND78 is the function you want. If you also want the outside lever to spin freely when locked to survive abuse, the ND98 is the Vandlgard version of the same F110 function.
9) Does the ND78 come with the lockdown instruction rose?
In 626 finish, yes. ND78 locks ordered in 626 satin chrome come standard with the instruction rose, part 47342586, which shows the key rotation direction for rapid lockdown. Other finishes get a standard rose instead. For a school where staff need to act fast under stress, that rose is a reason to specify 626.
10) Is the ND78 electrified, and what if I need an access controlled version?
No, the ND78 is a mechanical lock with no electronics. If the opening needs power, the ND series includes six wired functions with autodetecting 12-24V DC input, switch-selectable EL/EU fail safe or fail secure operation set on the chassis, modular request to exit rated 3A at 125VAC or 2A at 30VDC, and 0.23 amp maximum with 0.01 amp holding current. Those electrified versions exceed BHMA A156.25 for indoor electrified locks and use the same 161L prep.
11) Can I get the ND78 keyed into our existing master key system?
Yes. Schlage ND locks support open, patented, restricted, geographic exclusive and UL437 key systems, plus Primus, master keying and construction keying. The standard Schlage cylinder is a 6-pin patented Everest 29 S123 keyway. Because this is the less-cylinder build, you can also install cylinders from Best, Corbin Russwin, Medeco, Sargent or Yale to stay on a system you already run.
12) We need a storeroom door, not a classroom lockdown. What is the alternative to the ND78?
The ND78 locks and unlocks the outside lever with a 180 degree key rotation from either side and is not the right function for a door that should simply stay locked outside at all times. For that, the Cal-Royal AG05 is a Grade 2 storeroom lever lockset with a deadlocking latchbolt and a 1-3/8 inch to 1-3/4 inch door thickness range, and the Hager 2580 is a Grade 2 storeroom cylindrical lock with the Withnell lever covering 1-3/8 inch to 2 inch doors.
13) What Grade 1 lever lock should I put on the non-keyed doors in the same corridor as the ND78?
To keep the same Grade 1 heavy duty level on doors that do not need a cylinder, the Falcon K101 is a Grade 1 non-handed passage cylindrical lock, fire rated, with a 1-3/8 inch to 2-1/4 inch door thickness range, and the Falcon T101 is a Grade 1 heavy duty passage lever with pressure release technology. The Corbin Russwin CL3110 is a Grade 1 vandal resistant passage lever, fire rated, for 1-3/4 inch to 2 inch doors. The ND78 itself is the keyed Grade 1 classroom security lock in the run.
14) Can an electrified lever lock do what the ND78 does for classroom lockdown?
They solve lockdown differently. The ND78 is a mechanical, non-electronic lock that is secured by turning a key 180 degrees in either lever. An electrified option such as the Corbin Russwin CL33903 is a Grade 1 fail safe cylindrical lever lock operating on 12V AC/DC for 1-3/4 inch to 2 inch doors, which means lockdown is commanded from an access control system rather than by key at the door.
15) Is a keypad leverset a substitute for the ND78 on a classroom door?
Not for the same job. The ND78 is a mechanical double cylinder lock rated Grade 1, with key cylinders in both levers for lockdown from inside or outside. Keypad products such as the Delaney LP250 electronic keypad leverlock, Grade 2, or the Lockey 1150 heavy duty mechanical keypad lever set with double combination for 1-1/8 inch to 2 inch doors control entry by code rather than by key, and do not provide the two-sided keyed lockdown.
16) I need a matching dummy or passage lever for the inactive leaf next to my classroom security door. What are my options?
Within the ND series, ND170 is a single dummy trim (fixed lever one side, no latch or chassis) and ND172 is a double dummy with fixed levers both sides; latch cover plates for the dummy are part 47269199. For passage on an adjacent door, ND10 is the ANSI F75 passage latch. If you are matching in a different brand, the BEST 9K Series 1DT single dummy trim and the Accentra 455LN Augusta are Grade 1 dummy levers, and the Falcon K101 is a Grade 1 passage lever for 1-3/8 to 2-1/4 inch doors.
17) What matching dummy trim goes with a Grade 1 lever lock like the ND78 on an inactive leaf?
The ND78 is a keyed cylindrical lever lock, so an inactive leaf needs separate dummy trim. Grade 1 options include the BEST 9K Series 1DT single dummy trim cylindrical lever lock, heavy duty and non-keyed, and the Accentra 455LN Augusta heavy duty Grade 1 single dummy. A Grade 2 alternative is the BEST 7KC Series single dummy trim, which is medium duty.
18) For an office or entrance door that does not need classroom security, what is a lighter-duty lever than the ND78?
The ND78 is a Grade 1 heavy duty commercial lock. Where a lower grade suits the traffic, the Falcon B511CP6D is a Grade 2 medium duty cylindrical lever with entry/office function, the Hager 2525 is a Grade 2 commercial cylindrical entry lock for 1-3/8 inch to 2 inch doors, and the Cal-Royal AUS00 is a Grade 3 entrance/office lever with a solid brass forged body for 1-3/8 inch to 1-3/4 inch doors.
How fast can I get the Schlage ND78-CD-RHO-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 Schlage ND78-CD-RHO-626 come with a warranty?
Absolutely. The Schlage ND78-CD-RHO-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 Schlage ND78-CD-RHO-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 Schlage ND78-CD-RHO-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.

Videos

!