Cal-Royal SC8457 Grade 1 Class...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$349.96
Cal-Royal Cal-Royal SC8457 Grade 1, Classroom Security w/ Deadbolt Mortise Lockset, SS Lever, Satin Chrome SC8457-26D

Cal-Royal SC8457 Grade 1 Classroom Security Deadbolt Mortise Lockset with Interchangeable Core

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Model: SC8457 SS US26D
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$349.96
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Cal-Royal SC8457 Grade 1 Classroom Security Deadbolt Mortise Lockset with Interchangeable Core

The Cal-Royal SC8457 is a Grade 1 classroom security mortise lockset with deadbolt, engineered for doors 1 ¾" (44.5mm) thick standard with a 2 ¾" (70mm) backset and 3 7/8" (98mm) center-to-center dimension. Featuring a heavy-duty wrought steel lock case, hardened stainless steel 1" throw deadbolt, and ¾" throw stainless steel latch bolt, this lockset conforms to ANSI A156.13 Grade 1 standards and exceeds 1,000,000 test cycles. The double-cylinder keyed function with 6-pin solid brass "C" keyway and interchangeable core compatibility with BEST, FALCON, and ARROW makes it ideal for demanding commercial and educational environments.

Key Features

  • Door & Backset Specifications: Designed for 1 ¾" (44.5mm) thick doors standard with a 2 ¾" (70mm) only backset and 3 7/8" (98mm) center-to-center measurement for precise fit.
  • Heavy-Duty Durability: Lock body conforms to ANSI A156.13 Grade 1 operational and dimensional standards, exceeding 1,000,000 cycles for long-term reliability in high-traffic applications.
  • Heavy-Duty Construction: Wrought steel lock case with zinc dichromate plating, hardened stainless steel 1" throw deadbolt, and one-piece stainless steel ¾" throw latch bolt with anti-friction reversible tongue.
  • Armor Faceplate: Brass or stainless steel faceplate measuring 8" x 1 7/32" (203mm x 31.3mm) per ANSI Standard A115.1.
  • Field Reversible Lock Hand: Lock bodies are easily field reversible, eliminating the need to specify handing when ordering.
  • Cylinder & Interchangeable Core Compatibility: 6-pin solid brass "C" keyway standard; interchangeable core locks accept compatible 6 or 7 pin cores from BEST, FALCON, and ARROW (SFIC).
  • Clutch Lever Design: Outside lever features a free-wheeling clutch that rotates when locked, preventing excessive force from being applied and reducing the risk of lever breakage or damage.
  • Retrofit Capability: Can retrofit Schlage L9000 Series mortise locks without drilling additional holes for sectional and escutcheon trims, with no exposed mounting screws on outside or inside trims.

Certifications & Compliance

  • ANSI/BHMA A156.13 Series 1000, Operational & Security Grade 1 Standards
  • UL and cUL Listed to Canadian safety standard for A label (3-hour fire door); stamped letter F and UL symbol on armor faceplate
  • Meets positive pressure requirements UL 10C and UBC 7-2 (1997)
  • Meets ADA requirements, specifically designed for Barrier Free Application

Technical Specifications

  • Product Group: Mechanical Locks
  • Cylinder and Keyways: 6-pin solid brass "C" keyway standard, Interchangeable Core locks will accept compatible 6 or 7 Pin cores with BEST, FALCON and ARROW (SFIC)
  • Product Subgroup: Mortise Locks and Trim
  • Latch Throw: 3/4" (latch), 1" (deadbolt)
  • Keyed Function: Double Cylinder
  • Commercial/Residential: Commercial
  • Keyed: Yes
  • Electronic: No
  • (CTC) Center-to-Center: 3-7/8"
  • Door Hand Direction: Field Reversible
  • Door Thickness Range: 1-3/4"
  • Face Plate: Brass or stainless steel, 8" x 1-7/32"
  • Product Category: Mechanical Locks
  • Backset (Distance): 2-3/4"
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Cal-Royal SC8457?

Cal-Royal SC8457 mortise locksets deliver professional-grade reliability with heavy-duty wrought steel construction and hardened stainless steel components rated to exceed 1,000,000 test cycles under ANSI A156.13 Grade 1 standards. Engineered for demanding classroom and commercial applications where dependable security performance and code compliance are essential.

Product Specs

Product Group:
Mechanical Locks
Cylinder and Keyways:
6-pin solid brass "C" keyway standard, Interchangeable Core locks will accept compatible 6 or 7 Pin cores with BEST, FALCON and ARROW (SFIC)
Grade:
Grade 1
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Subcategory:
Mortise Lockset
ANSI/BHMA:
ANSI Standard A115.1
Latch Throw:
3/4" (latch), 1" (deadbolt)
Keyed Function:
Double Cylinder
Commercial/Residential:
Commercial
Lock Type:
Mortise
Keyed:
Yes
Handle Type:
Lever
Lock Function:
Classroom Security
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
SC8457
(CTC) Center-to-Center:
3-7/8"
Product Function:
Classroom Security
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Face Plate:
Brass or stainless steel, 8" x 1-7 /32"
Product Category:
Mechanical Locks
Product Substrate:
Steel
Backset (Distance):
2-3/4"
Department:
Door Hardware

Cal-Royal SC8457 SS US26D – Frequently Asked Questions

1) Will the Cal-Royal SC8457 mortise lock drop into a door already prepped for a Schlage L9000?
Yes. The SC8457 retrofits Schlage L9000 Series mortise locks without drilling additional holes, for both sectional and escutcheon trims. It shares the standard mortise prep numbers: 2-3/4 inch backset, 3-7/8 inch center-to-center, and an 8 x 1-7/32 inch armor faceplate per ANSI A115.1. Neither the outside nor inside trim has exposed mounting screws.
2) Do I have to specify handing when ordering the SC8457 mortise lock?
No. The lock body is field reversible, so one part number covers left and right hand openings and the hand is set at install. That matters for a facility stocking spares: one lock on the shelf fits any door in the building.
3) Will the SC8457 latch into my existing ANSI strike?
It should. The latch bolt throws 3/4 inch and the deadbolt throws 1 inch, on a 2-3/4 inch backset with 3-7/8 inch center-to-center between latch and deadbolt, which is the standard ANSI mortise layout. The armor front is 8 x 1-7/32 inches per ANSI A115.1, so a frame already cut for an ANSI mortise strike takes it. The latch has an anti-friction reversible tongue.
4) Can I key the Cal-Royal SC8457 into my existing BEST small format interchangeable core system?
Yes. The interchangeable core version accepts compatible 6 or 7 pin SFIC cores from BEST, FALCON, and ARROW, so it folds into a masterkey system you already run. Ordered without IC, it comes with a 6-pin solid brass C keyway cylinder as standard. It is a double cylinder keyed function, meaning key operation on both sides of the deadbolt.
5) Is the Cal-Royal SC8457 fire rated for a 3-hour door?
It is UL and cUL Listed to the Canadian safety standard for A label, which is a 3-hour fire door, and the armor faceplate carries the stamped letter F and the UL symbol so an inspector can verify it in place. It also meets positive pressure requirements under UL 10C and UBC 7-2 (1997), and meets ADA requirements for barrier free application.
6) What is the closest mechanical alternative to the Cal-Royal SC8457 classroom mortise lock?
The Corbin Russwin ML2003 is the nearest straight mechanical equivalent. Both are Grade 1 mortise locksets with a classroom function on 1-3/4 inch doors. The Cal-Royal SC8457 is a classroom security lock with a deadbolt, a 1 inch stainless deadbolt throw plus a 3/4 inch latch throw, and a double cylinder keyed function; the ML2003 is a keyed mortise classroom lockset in the ML2000 Series. If the opening needs the auxiliary deadbolt, the SC8457 is the one that carries it.
7) I need classroom security but the school wants keypad or credential access instead of keys. What should I look at?
The Cal-Royal SC8457 is a purely mechanical lockset - it is keyed with a 6-pin solid brass C keyway and no electronics. For credential-based classroom openings, the TownSteel FME-2000 is a Grade 1 heavy duty mortise lockset with a classroom function and RFID technology for 1-3/4 inch doors, and the TownSteel FME-4000 is an electronic intruder classroom mortise lockset with RFID on the same door thickness. Alarm Lock also offers the DL3500CR, a Grade 1 electronic mortise lock with classroom function and 300 user codes, though it is built for 1-5/8 to 1-7/8 inch doors.
8) Our doors are 1-5/8 inch - can we still use the SC8457?
The Cal-Royal SC8457 is built for 1-3/4 inch doors. If the leaf is thinner, the Alarm Lock DL2700CR covers 1-5/8 to 1-7/8 inch doors as a Grade 1 classroom function electronic mortise lock with weatherproof design, and the DL3500CR covers the same 1-5/8 to 1-7/8 inch range with 300 user codes. Both keep the classroom function on a door the SC8457 is not dimensioned for.
9) We use Baldwin 6310 mortise bodies on our residential-style entrances. Can the SC8457 go on those doors?
Check the backset before you order. The Baldwin 6310 entrance/storeroom mortise lock body uses a 2-1/2 inch backset on doors 1-3/8 inch and over, and the 6301 entry/apartment body is also 2-1/2 inch backset. The Cal-Royal SC8457 is a 2-3/4 inch backset only, on 1-3/4 inch doors, so the mortise pocket and cylinder hole locations will not line up with an existing Baldwin 2-1/2 inch prep without rework.
10) What does classroom security function mean on the SC8457, and is it the right function for a lockdown policy?
Classroom security with deadbolt means the door can be secured from inside without the teacher stepping into the corridor, using the key rather than a corridor-side operation. The 1 inch hardened stainless steel deadbolt provides the secure throw. If your district has moved to an electronic lockdown standard instead, the TownSteel FME-2000 and FME-4000 are Grade 1 classroom mortise locksets with RFID, and the Alarm Lock DL3500CR is a Grade 1 classroom-function electronic mortise lock with keypad.
11) Is the SC8457 durable enough for a high-traffic school corridor?
The lock body conforms to ANSI/BHMA A156.13 Series 1000 Grade 1 operational and security standards and exceeds 1,000,000 test cycles. Construction is a wrought steel case with zinc dichromate plating, a hardened stainless steel deadbolt and a one-piece stainless steel latch. The outside lever uses a free-wheeling clutch that spins when the lock is secured, so someone yanking on a locked door does not snap the lever or transfer force into the lock body.
12) What trim and finish choices do I need to pick when ordering the Cal-Royal SC8457?
Two decisions. Trim comes in fourteen sectional and wide escutcheon designations: AE, AS, GE, GS, HE, HS, JE, JS, SE, SS, TE, TS, WE and WS. Finish is one of five: US3 polished brass, US4 satin brass, US10B antique bronze oiled, US26D satin chrome, and US32D satin stainless steel. Handing is not a choice, since the body reverses in the field, and the armor faceplate is brass or stainless steel.
13) How does the Cal-Royal SC8457 compare to a Corbin Russwin ML2003 classroom mortise lock?
Both are Grade 1 mortise locks for 1-3/4 inch doors with a classroom function. The difference to weigh is the deadbolt and the keying: the SC8457 is a classroom security lockset with a 1 inch deadbolt, double cylinder keyed, and accepts BEST, FALCON and ARROW small format interchangeable cores. If you are matching an existing Corbin Russwin ML2000 Series opening across a building, the ML2003 keeps you on one series.
14) The opening does not need classroom function - it is a storeroom door. What mortise lock should I use instead of the SC8457?
For a storeroom opening, the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever. The BEST 45H Series heavy duty mortise lock body covers public entrance function and is field reversible, as is the Cal-Royal SC8457, whose lock body is field reversible so handing does not have to be specified. Reserve the SC8457 for openings where the classroom security function and its deadbolt are actually called for.
15) What is the difference between the Cal-Royal SC8457 and the Sargent 7925 for a dormitory corridor door?
The Sargent 7925 is a Grade 1 heavy duty corridor/dormitory function mortise lock in the 7900 Series, supplied with rose trim and a single cylinder deadbolt. The Cal-Royal SC8457 is Grade 1 classroom security with a double cylinder keyed function and a 1 inch deadbolt, and is offered with sectional or wide escutcheon trims. For a dormitory exit opening the 7925 function is the match; for a classroom the SC8457 is.
16) We need a non-keyed mortise lock for an interior door in the same building as our SC8457 classrooms. What matches?
For non-keyed openings, the Hager 3810E is a Grade 1 passage mortise lock with escutcheon and a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors, and the 3810S is the same passage lock with a rose. The Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset, and the 3850E is a Grade 1 non-keyed office function with lever and escutcheon. All share the 2-3/4 inch backset the Cal-Royal SC8457 uses, so prep stays consistent across the run of doors.
17) The SC8457 retrofits Schlage L9000 mortise locks - what if I need an electrified version on one of those openings?
The Cal-Royal SC8457 retrofits Schlage L9000 Series mortise locks without drilling additional holes for sectional and escutcheon trims, but it is mechanical only. For an electrified opening in the same family, the Schlage L9092EU with 03A trim is a heavy duty corridor function mortise lock, keyed outside, with electric lock/unlock outside lever, request to exit, and 12/24VDC operation on 1-3/4 inch doors. Command Access ML190 is another route, a heavy duty motorized storeroom mortise lock with field selectable EL/EU operation at 24VDC.
18) Is a TownSteel MRX-L-01 an alternative to the Cal-Royal SC8457 for a behavioral health facility?
For a ligature-resistant opening it is the better fit, but it is not a functional swap. The TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset with a passage function for 1-3/4 inch doors, and the MRX-A-01 is the same passage function with ligature-resistant arch trim. The Cal-Royal SC8457 is a keyed classroom security lockset with a deadbolt on the same 1-3/4 inch door - it locks, where the MRX passage functions do not. Marks USA also offers the 5PDN, a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel.
19) What looks like a mortise lockset but will not replace the Cal-Royal SC8457?
Several items in the mortise family are trim or components, not locking locksets. The Schlage L0170 is a Grade 1 mortise half dummy trim, non-keyed, for 1-3/4 inch doors. The Emtek 3102 Memphis, 3104 Hamilton, and 3106 Manhattan are dummy mortise entrance locksets. Sargent 130KB and 130W are mortise thumbturns. The Cal-Royal SC8457 is a keyed Grade 1 classroom security lockset with a 1 inch deadbolt and 3/4 inch latch, so none of those will secure the opening.
20) Is the Cal-Royal SC8457 suitable for a residential apartment door?
It is a commercial-duty lockset, built for offices, schools, healthcare, retail, industrial, multi-tenant residential and government buildings. On a decorative residential entrance you would be better served by an ornamental mortise body such as the Baldwin 6301 entry/apartment lock, which uses a 2-1/2 inch backset and covers 1-3/4 inch and over doors. Note that 2-1/2 inch backset is a different door prep from the SC8457's 2-3/4 inch.
How fast can I get the Cal-Royal SC8457 SS US26D delivered?
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Does the Cal-Royal SC8457 SS US26D come with a warranty?
Absolutely. The Cal-Royal SC8457 SS US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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