Cal-Royal SC8453 Grade 1 Entra...
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$321.05
$231.53
Cal-Royal SC8453 Grade 1, Entrance Mortise Lockset

Cal-Royal SC8453 Grade 1 Entrance Mortise Lockset with Interchangeable Core Prep

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Model: SC8453 SS US26D
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$321.05
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Cal-Royal SC8453 Grade 1 Entrance Mortise Lockset with Interchangeable Core Prep

The Cal-Royal SC8453 is a Grade 1 entrance mortise lockset built for 1 ¾" (44.5mm) thick standard doors with a 2 ¾" (70mm) backset and 3 7/8" (98mm) center-to-center dimension. Constructed with a heavy-duty wrought steel lock case, zinc dichromate plated, this lockset conforms to ANSI A156.13, Grade 1, and is tested to exceed 1,000,000 cycles for long-term commercial reliability. It can retrofit Schlage L9000 Series mortise locks without drilling additional holes, and accepts compatible 6 or 7 pin interchangeable cores from BEST, FALCON, and ARROW.

Key Features

  • Door Thickness Compatibility: Designed for 1 ¾" (44.5mm) thick standard doors, matching the 1-3/4" door thickness range specification.
  • Backset & Center-to-Center: 2 ¾" (70mm) backset only, with 3 7/8" (98mm) center of lever to center of cylinder dimension.
  • Heavy-Duty Durability: Lock body conforms to ANSI A156.13 Grade 1 dimensional and operational performance, exceeding 1,000,000 cycles for high-traffic reliability.
  • Heavy-Duty Construction: Wrought steel lock case with zinc dichromate plating; hardened stainless steel deadbolt with 1" (25.4mm) throw; one-piece stainless steel latch bolt with anti-friction reversible tongue and ¾" (19mm) throw.
  • Field Reversible Lock Hand: Lock bodies are easily field reversible, eliminating the need to specify hand when ordering.
  • Armor Faceplate: Brass or stainless steel faceplate, 8" x 1 7/32" (203mm x 31.3mm), per ANSI Standard A115.1, with brass or stainless steel strike and curved lip with dust box.
  • Cylinder & Interchangeable Core Compatibility: 6-pin solid brass "C" keyway standard; interchangeable core locks accept compatible 6 or 7 pin cores with BEST, FALCON, and ARROW (SFIC).
  • Clutch Lever Design: Outside lever features a free-wheeling clutch design that rotates when locked, decreasing the chance of lever breakage from excessive force.

Certifications & Compliance

  • Meets 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)
  • Commercial/Residential: Commercial
  • Keyed: Yes
  • Electronic: No
  • (CTC) Center-to-Center: 3-7/8"
  • Product Function: Entrance/Office
  • 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 SC8453?

Cal-Royal SC8453 mortise locksets deliver professional-grade reliability with a heavy-duty wrought steel lock case, hardened stainless steel deadbolt, and stainless steel latch bolt rated to exceed 1,000,000 cycles under ANSI A156.13 Grade 1 testing. Engineered for demanding commercial entrance applications where dependable, code-compliant performance is 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)
Commercial/Residential:
Commercial
Lock Type:
Mortise
Keyed:
Yes
Handle Type:
Lever
Lock Function:
Entrance
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
SC8453
(CTC) Center-to-Center:
3-7/8"
Product Function:
Entrance/Office
Door Hand Direction:
Field Reversible
Door Thickness Range:
1-3/4"
Face Plate:
Brass or stainless steel, 8" x 1-7 /32"
Product Substrate:
Steel
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Cal-Royal SC8453 SS US26D – Frequently Asked Questions

1) Will the Cal-Royal SC8453 mortise lock replace a Schlage L9000 mortise lock without new door prep?
It drops into an existing Schlage L9000 Series mortise prep with no additional holes drilled. The 2-3/4 inch backset and 3-7/8 inch center of lever to center of cylinder dimension are what make that work, so the existing pocket, cylinder hole and trim holes line up. If you are swapping out L9000s across a building, that is the retrofit path.
2) What door thickness does the Cal-Royal SC8453 mortise lockset fit?
1-3/4 inch doors, which is the standard commercial door thickness. It is a single-thickness lock, so a 1-3/8 inch older interior door or a thick 2 inch or 2-1/2 inch door is outside what the SC8453 covers. On thicker openings a Hager 3800 Series mortise lock covers 1-3/4 to 2-1/2 inches, though those are passage and office functions rather than a keyed entrance.
3) Do I have to specify handing when ordering the Cal-Royal SC8453?
No. The lock body is field reversible, so one part number covers left and right hand openings and you set the hand at the door. That matters if you are stocking spares for a building with mixed handing, you carry one lock instead of two. The anti-friction tongue on the latch bolt reverses with it.
4) Does the Cal-Royal SC8453 take BEST small format interchangeable cores?
The interchangeable core version accepts compatible 6 or 7 pin SFIC cores from BEST, FALCON and ARROW, so it drops into an existing small format masterkey system without rekeying the building. Standard, non-IC locks ship with a 6-pin solid brass C keyway cylinder. Cores are a separate line item, the lock is prepped for them.
5) Will the Cal-Royal SC8453 latch into my existing ANSI mortise strike?
The latch bolt throws 3/4 inch and the deadbolt throws 1 inch, standard mortise throws, and the armor faceplate measures 8 x 1-7/32 inches per ANSI Standard A115.1. If the frame was prepped to A115.1 for a mortise lock, the faceplate and strike locations line up. A brass or stainless strike with a curved lip and dust box comes with it, so you can replace the frame strike at the same time rather than reusing a worn one.
6) I have a residential 2-1/2 inch backset mortise lock, can I use the Cal-Royal SC8453 to replace it?
No. The SC8453 is 2-3/4 inch backset only, so a door bored for a 2-1/2 inch backset puts the cylinder and lever in the wrong place and the lock will not line up. For those openings the Baldwin 6301 entry/apartment mortise lock bodies are 2-1/2 inch backset, in knob by knob or lever by lever, for 1-3/4 inch and over. Measure from the door edge to the center of the lever before you order either one.
7) I need a storeroom mortise lock, not an office function - what should I order instead of the Cal-Royal SC8453?
The SC8453 is an Entrance/Office function lock, which means the inside lever is always free and the outside lever can be left unlocked. A storeroom function keeps the outside lever permanently locked and key-only. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever. The Baldwin 6310 is an entrance/storeroom mortise lock body with a 2-1/2 inch backset for doors 1-3/8 inch and over, available knob by knob, with the 6310190RRLS as a right hand reverse lever by lever version. Note the backset difference: the SC8453 is 2-3/4 inch only, so a 2-1/2 inch Baldwin body will not drop into the same door prep.
8) What mortise lock should I use instead of the Cal-Royal SC8453 if the door needs a keypad or card credential?
The SC8453 is a mechanical, non-electronic lockset. For credentialed access on a mortise prep, the Dormakaba E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card lock in the E-Plex 5X86 Series, back to back. The Schlage CO-100 is a Grade 1 heavy duty standalone electronic mortise lock with a keypad reader for 1-3/4 inch doors, in privacy function. The Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock with 300 user codes in classroom function, though it is built for 1-5/8 inch to 1-7/8 inch doors. The BEST 45HZ EZ Series is an electronic keypad mortise lock with key override, which keeps a mechanical key path like the SC8453 has.
9) Which mortise lock replaces a Cal-Royal SC8453 on a behavioral health or ligature-resistant opening?
The SC8453 uses a projecting lever with a free-wheeling clutch, which is not appropriate where ligature resistance is required. 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, and the MRX-A-01 is the same passage function in a satin stainless steel ligature resistant arch trim, also 1-3/4 inch. Both share the SC8453's 1-3/4 inch door thickness. For a hospital opening that needs no locking at all, the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset in the 195 Series, ligature resistant and ADA compliant in satin stainless steel - the SC8453 also meets ADA requirements, so either works on a barrier-free door.
10) I need the mortise lock to release on an access control signal - what takes the place of a Cal-Royal SC8453?
The SC8453 is a mechanical entrance lock with no electrical function. For an access-controlled opening, the Schlage L9092EU with 03A trim is a heavy duty corridor function mortise lock for 1-3/4 inch doors, keyed outside, with electric lock/unlock on the outside lever, request to exit, and 12/24VDC operation - the same 1-3/4 inch door the SC8453 fits. The Command Access ML190 Series is a heavy duty motorized mortise lock in storeroom function with field selectable EL or EU operation on 24VDC, so the fail-safe or fail-secure decision can be made in the field rather than at order time.
11) Can I put a Cal-Royal SC8453 in an aluminum storefront or a glass door?
No. The SC8453 is a mortise lockset for 1-3/4 inch thick standard doors with a 2-3/4 inch backset and an 8 inch by 1-7/32 inch armor faceplate, which is a hollow metal or wood door prep, not a narrow aluminum stile. For aluminum storefront, the Alarm Lock DL1300NW Trilogy Networx wireless electronic mortise lock is made for Adams Rite deadlatches, and the Dormakaba E-Plex 2066 Series electronic pushbutton keyless mortise lock is a wide stile device. For an all-glass door, the Kaba Ilco BR Series is a glass door bottom rail lock.
12) Which mortise lock should I standardize on across a school if some doors need RFID credentials and others stay mechanical?
The Cal-Royal SC8453 covers the mechanical side: Grade 1 commercial, entrance/office function, 1-3/4 inch doors, 2-3/4 inch backset, and it accepts BEST, FALCON and ARROW interchangeable cores so all the mechanical openings key alike. For the credentialed doors, the TownSteel FME-2000 Series is a Grade 1 heavy duty mortise lockset with RFID in classroom function for 1-3/4 inch doors, and the FME-4000 Series is the electronic intruder classroom mortise lockset with RFID, also Grade 1 heavy duty for 1-3/4 inch doors. The Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a mobile-enabled deadbolt with LED in Greenwich trim, right hand. All three carry the same 1-3/4 inch door thickness as the SC8453, so one door prep spans the mechanical and credentialed openings.
13) What is the difference between entrance/office function and storeroom function on a mortise lock?
The SC8453 is an entrance/office lock, so the outside lever can be left unlocked for business hours and locked when you want key-only access, and it carries a deadbolt with a 1 inch throw for securing the opening at close. A storeroom function is the other choice, outside lever always locked, key every time, no thumbturn decision for staff to get wrong. If that is what the opening needs, the Accentra 8805FL is a Grade 1 storeroom mortise lock. Offices, tenant suites and main entries usually want entrance function; supply rooms and electrical closets want storeroom.
14) What trim do I have to pick when ordering a Cal-Royal SC8453, and what do the letters mean?
Two choices go on the order. First the trim, fourteen options across sectional and wide escutcheon styles: AE, AS, GE, GS, HE, HS, JE, JS, SE, SS, TE, TS, WE and WS. The letter pairs run E for escutcheon and S for sectional, so the same lever design is available either way, escutcheon for a full plate covering the older prep, sectional for a cleaner rose look. Second the finish, five of them: US3 polished brass, US4 satin brass, US10B antique bronze oiled, US26D satin chrome and US32D satin stainless steel. All of it is lever trim, no knob option.
15) Is the Cal-Royal SC8453 ADA compliant for a barrier free opening?
Yes, it meets ADA requirements and is built for barrier free application. The lever trim is what does it, no tight grasping or wrist twisting to operate, which is the requirement on accessible routes. All fourteen trim options are lever, so any configuration you order stays compliant.
16) Is the Cal-Royal SC8453 heavy duty enough for a high traffic building entrance?
It is tested to exceed 1,000,000 cycles under ANSI A156.13 Grade 1, the top operational and security grade in the Series 1000 mortise standard. The case is wrought steel with zinc dichromate plating, the deadbolt is hardened stainless, and the latch bolt is one-piece stainless. The outside lever uses a free wheeling clutch that spins when the lock is locked, which is the detail that matters on a school or apartment entry, someone yanking a locked lever turns it harmlessly instead of snapping the spindle.
17) Does the Cal-Royal SC8453 mortise lock need any wiring or power?
No, it is fully mechanical. Nothing to wire, no batteries, no access control panel, and nothing that fails when the power drops. If the opening needs credentials or audit trail instead, the electrified mortise options are a different animal, the Schlage L9092EU with request-to-exit on 12/24VDC for a wired access control tie-in, or the TownSteel FME-2000 Series Grade 1 RFID mortise lockset for standalone card access on a 1-3/4 inch door.
18) Can I standardize a whole building on the Cal-Royal SC8453 mortise lockset?
For entrance and office openings, yes, and the interchangeable core prep is what makes it practical, one core system from BEST, FALCON or ARROW across every door, rekey by pulling cores instead of pulling locks. Field reversible bodies mean you stock one lock for the whole building regardless of hand. Where you need other functions on the same prep, the SC8453 will not cover them, a Falcon MA101 handles Grade 1 heavy duty passage on hall and closet doors, and a Sargent 7925 covers corridor and dormitory function with a single cylinder deadbolt.
19) Is there a cheaper non-keyed mortise lock than the Cal-Royal SC8453 for doors that do not need to lock?
The SC8453 is keyed with a 6-pin solid brass C keyway, so it is more lock than a corridor or closet door needs. For openings with no locking requirement, the Hager 3810E is a Grade 1 passage mortise lock with a 2-3/4 inch backset and escutcheon trim for doors 1-3/4 inch to 2-1/2 inch, and the 3810S is the same passage lock with rose trim instead. The Falcon MA101 is a Grade 1 heavy duty mortise passage lock in the MA Series that is field reversible and fire rated. The Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors. The Hager backset matches the SC8453 at 2-3/4 inch, so it uses the same door prep.
20) Can I use a Sargent 130KB thumbturn or a Sargent 4874 deadbolt in place of a Cal-Royal SC8453?
No - those are different devices. The SC8453 is a complete keyed mortise lockset with lever trim, a 3/4 inch latch throw and a 1 inch deadbolt throw in one lock case. The Sargent 130KB is a standard duty mortise thumbturn in the 8200 Series and the 130W is a mortise thumbturn with a round backplate in the 7800 Series - both are trim pieces that turn a deadbolt, not lock bodies. The Sargent 4874 is a double cylinder mortise deadbolt in the 4870 Series with a 2-3/4 inch backset; it throws a bolt but carries no latch and no lever, so it cannot latch the door on its own. The Kaba Ilco 185 Series is likewise a deadbolt function mortise lock with no handing.
21) The Cal-Royal SC8453 takes BEST interchangeable cores - what BEST mortise lock bodies compare to it?
The SC8453 accepts compatible 6 or 7 pin interchangeable cores from BEST, FALCON and ARROW, so a facility already keyed to BEST SFIC can run it alongside BEST hardware. On the BEST side, the 45H Series heavy duty mortise lock body is a public entrance function with field reversible operation, matching the SC8453's field reversible lock hand. The 45HCA Series heavy duty mortise lockbody in the 40H Series is an intruder function, which locks the corridor side from inside the room - a different security behavior from an entrance/office lock. For powered openings, the BEST 45HW Series is a heavy duty wired electromechanical mortise lock running 12V or 24V.
22) What is the difference between the Cal-Royal SC8453 and a Sargent 7925 dormitory mortise lock for a multi-family corridor door?
Both are Grade 1 mortise locks for corridor duty, but they behave differently at the door. The SC8453 is an Entrance/Office function with a 1 inch deadbolt throw and a 3/4 inch latch throw, field reversible, on a 2-3/4 inch backset. The Sargent 7925 is a heavy duty Grade 1 corridor/dormitory exit function mortise lock in the 7900 Series with rose trim and a single cylinder deadbolt. The dormitory exit function is the one to look at when the resident must be able to retract the deadbolt and latch together from inside on one motion. The SC8453 comes in sectional and wide escutcheon trims rather than rose only, which matters if the other doors on the floor already carry escutcheon trim.
23) Is the Schlage L0170 a substitute for a Cal-Royal SC8453 on the inactive leaf of a pair of doors?
For an inactive leaf that only needs a pull, the Schlage L0170 is the right kind of part: a Grade 1 heavy duty non-keyed half dummy trim in the L Series, dummy function, for 1-3/4 inch doors - the same door thickness the SC8453 is built for. It is trim with no lock case, so it will not latch. Worth noting on a pair: the SC8453 retrofits Schlage L9000 Series mortise locks without drilling additional holes, so a building already trimmed in Schlage L Series can carry the SC8453 on the active leaf and L0170 half dummy on the inactive leaf.
24) What is the equivalent of a Cal-Royal SC8453 for a bathroom or private office that needs privacy, not keyed entrance?
The SC8453 is keyed with an entrance/office function, which is more than a bathroom door needs. The Hager 3840S is a Grade 1 privacy mortise lock with a 2-3/4 inch backset in privacy/bed/bath function, for doors 1-3/4 inch to 2 inch - the same 2-3/4 inch backset as the SC8453. For a non-keyed office door, the Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon, non-keyed, also 2-3/4 inch backset, for doors 1-3/4 inch to 2-1/2 inch. The 3850E escutcheon trim is worth noting against the SC8453, which is available in sectional and wide escutcheon trims.
25) The opening is already prepped for a mortise lock but the customer wants a cylindrical lock - what changes?
A cylindrical lock will not go into a mortise pocket. The Cal-Royal SC8453 is a mortise lock type with a 2-3/4 inch backset and an 8 inch by 1-7/32 inch armor faceplate cut into the door edge. The Schlage PC10 is a Grade 1 passage cylindrical lock, non-keyed with rose, for 1-3/4 inch doors - a bored prep, not a pocket. The Schlage PM010 is the mortise equivalent in the same non-keyed passage role, Grade 1 for 1-3/4 inch doors, and is what drops into a door already cut for the SC8453 family.
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Does the Cal-Royal SC8453 SS US26D come with a warranty?
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