Name: Medeco 11C61 M3 Maxum Commercial Single Cylinder Deadbolt - 6-Pinned, DL Keyway, Classroom Function
Brand: Medeco
SKU: MED-11C611T-26-DLT
Price: 194.08 USD
Availability: InStock

Product Overview
FAQs

Medeco 11C61 M3 Maxum Commercial Single Cylinder Deadbolt — 6-Pinned, DL Keyway, Classroom Function

The Medeco M3 Maxum Commercial Single Cylinder Deadbolt (Model 11C61) is a heavy-duty, high-security bored lockset engineered for maximum resistance against physical and covert attacks. Featuring ANSI/BHMA A156.36 Grade 1 certification and UL 437 listing, this 6-pinned deadbolt with DL Keyway and Classroom Function is built from solid brass construction with hardened steel components. It accommodates doors 1-3/8" to 2-1/2" thick, requires a standard 2-1/8" crossbore and 1" edge bore (ANSI A115.13), and is compatible with Medeco M3, M4, M4 BiLevel, and M4 CLIQ key systems for seamless master-keying integration.

Key Features

Door Thickness Compatibility: Fits doors 1-3/8" to 2-1/2" thick, accommodating a wide range of commercial and residential door constructions.
Standard Door Preparation: Requires a 2-1/8" crossbore and 1" edge bore per ANSI A115.13 for straightforward installation with common door prep.
1" Solid Steel Bolt: Features a 1" solid steel bolt with hardened steel shroud providing robust protection against ice-pick and crowbar attacks.
Solid Brass Construction: Built with solid brass and hardened steel components to resist drilling, picking, bumping, and prying for long-term security performance.
M3 Sidebar Mechanism: Medeco M3 technology utilizes sidebars and hardened inserts — the sidebar prevents key rotation until all elements are perfectly aligned, defeating bumping and picking techniques.
Patented Key Control: Special angle-cut keys require proprietary key machines and blanks, preventing unauthorized duplication and reducing vulnerability to cloning and anti-3D printing attacks.
Master Keying Capability: Compatible with M3, M4, M4 BiLevel, and M4 CLIQ key systems, enabling integration into existing Medeco master key hierarchies across platforms.
Multiple Configuration Options: Available in single-cylinder, double-cylinder, and captive thumbturn configurations for tailored security and egress requirements.

Certifications & Compliance

ANSI/BHMA A156.36 Grade 1 Certified — Highest industry performance standard for deadbolts
UL 437 Listed — High resistance to physical attacks including drilling, picking, and prying
Heavy Duty Duty Level

Technical Specifications

Series: Maxum® Commercial Deadbolt
Cylinder Technology: Medeco M3
Pinning: 6-Pin
Keyway: DL Keyway
Cylinder Format: Fixed Cylinder
Certification: ANSI/BHMA A156.36 Grade 1 rated hardware platform
Door Thickness: Fits doors 1-3/8" to 2-1/2" thick
Door Prep: Standard 2-1/8" crossbore, 1" edge bore (ANSI/BHMA A115.13)
Construction: Solid-brass cylinder construction with hardened steel inserts
Warranty: 2-year manufacturer's warranty

Typical Applications

Commercial Office Buildings
Educational Facilities and Schools
Healthcare Institutions and Hospitals
Retail Establishments
Apartments, Condos, and Multi-Tenant Residential Properties
Restaurants and Hospitality Venues
Residential High-Security Entry Doors

Why Medeco?

Medeco Maxum deadbolts deliver professional-grade security through solid brass construction, hardened steel components, and the patented M3 sidebar mechanism — a combination that resists drilling, picking, bumping, and prying in the most demanding commercial and institutional environments. With ANSI/BHMA A156.36 Grade 1 certification and UL 437 listing, the Maxum is engineered to meet the highest industry standards where dependable, covert-attack-resistant performance is non-negotiable.

Manufacturer Resources

Medeco Product Catalog

Product Specs

Product Group:: Mechanical Locks
Series:: Maxum Series
Subcategory:: Bored Locksets
Product Subgroup:: Bored Locksets
Product Type:: Deadbolts
Duty Level:: Heavy Duty
Grade:: Grade 1
Technology:: M3
Keyed:: Yes
Keyed Function:: Single Cylinder
Lock Function:: Deadbolt
Product Attribute:: Deadbolts
Tags:: medeco m3 cam lock, medeco deadbolt, medeco m3, medeco m3 deadbolt
Product Model:: 11C61
Product Function:: Cylinder x Thumbturn
Keyway Options:: DL Keyway
Product Category:: Mechanical Locks
Department:: Door Hardware

Medeco MED-11C611T-26-DLT – Frequently Asked Questions

1) Will the Medeco 11C61 Maxum deadbolt fit a 2-inch thick door?

Yes. The 11C61 Maxum covers 1-3/8 inch through 2-1/2 inch doors, so a 2 inch slab is well inside the range. That upper end is unusual for a bored deadbolt, and it is what lets the Maxum go onto thick custom entries and older solid-core doors that most Grade 1 deadbolts top out below. For comparison, the Dexter DB1000 Grade 1 single cylinder is listed at 1-3/8 to 1-7/8 inches and the Accentra D111 Grade 1 at 1-3/8 to 1-3/4 inches.

2) Does the Medeco 11C61 deadbolt drop into an existing deadbolt prep, or do I have to re-bore the door?

Standard prep. The 11C61 uses a 2-1/8 inch crossbore and a 1 inch edge bore per ANSI A115.13, which is the same prep nearly every commercial bored deadbolt is cut for. If the door already carries a Grade 1 or Grade 2 tubular deadbolt, the holes are almost certainly right and it is a straight swap. You still pick the backset to match what is drilled: 2-3/8 inch and 2-3/4 inch are both offered.

3) Which backset do I order for a Medeco Maxum deadbolt, and what is the faceplate choice about?

Measure from the door edge to the center of the existing bore: 2-3/8 inches on most residential and light commercial doors, 2-3/4 inches on most commercial ones. Then match the latch face to the mortise already cut in the edge, 1 inch or 1-1/8 inch faceplate, or take the drive-in bolt if the edge has no mortise at all. There is also a Less Bolt Assembly option for when you are reusing a bolt already in the door or ordering the trim only.

4) Can a Medeco 11C61 be master keyed into the Medeco system we already run in the building?

It keys into M3, M4, M4 BiLevel, and M4 CLIQ systems, so an existing Medeco hierarchy absorbs it without starting a second system. The cylinder itself is M3, 6-pinned, in the DL keyway, so the change key and any master above it have to be cut on DL. At order time you choose Keyed Different, Keyed Alike, or Key Code, and Key Code is the one to use when you are adding to an existing system and need it cut to a specific bitting.

5) Is the Medeco Maxum deadbolt strong enough for a school or hospital corridor door?

It is built for exactly that duty. ANSI/BHMA A156.36 Grade 1, Heavy Duty, with a 1 inch solid steel bolt and a hardened steel shroud behind it, plus a solid brass cylinder body with hardened inserts against drilling. The 1 inch throw is what gets the bolt deep enough into a commercial strike and frame to matter under a pry attack. It is also UL 437 listed, which is the physical-attack listing covering drilling, picking, and prying.

6) Is a Medeco M3 deadbolt worth it over a standard Grade 1 deadbolt like the Falcon D111?

The difference is key control and pick resistance, not the lock body. The Falcon D111 is Grade 1 Heavy Duty and the Accentra D111 and Delaney LM Series are Grade 1 as well, and any of them will hold a door. What none of them do is stop key copying. The Medeco M3 sidebar will not let the plug rotate until every pin is both elevated and rotated correctly, which defeats bumping and picking, and the angle-cut DL keys need proprietary blanks and machines so nobody duplicates a key at a hardware counter. If your problem is unaccounted-for keys in a building, that is the reason to pay for Medeco. If the problem is just a weak door, a standard Grade 1 solves it.

7) I need a keyed deadbolt with no thumbturn on the inside for a classroom door. Will the 11C61 do that?

No. The 11C61 is cylinder outside by thumbturn inside, so the inside is always operable by hand. For a keyed-outside, blank-plate-inside deadlock, look at the Corbin Russwin DL2211, a Grade 1 cylindrical deadlock in classroom function with cylinder by blank for 1-3/4 inch doors, or the DL3211 in the same cylinder-by-blank arrangement. If you want no key at all and only an inside turn, the Arrow E60 is a non-keyed Grade 2 exit deadlock, blank plate by thumbturn, for 1-3/8 to 1-3/4 inch doors.

8) I have a door thicker than 1-3/4 inches and my current deadbolt will not fit. What are my options?

The Medeco 11C61 Maxum runs to 2-1/2 inches, which is the widest range of anything comparable and usually the answer on a thick custom or historic entry. If you do not need high-security keying, the Corbin Russwin DL3011 Grade 1 cylindrical deadlock is listed for 1-3/4 to 2-1/4 inch doors. Most other Grade 1 and Grade 2 deadbolts, including the Dexter DB2000 and the Hager 3215, stop at 1-3/4 inches and will not reach.

9) What is the closest Grade 1 classroom-function deadbolt to the Medeco 11C61 if a Medeco key system is not required?

The Falcon D111 is the nearest straight equivalent. It is a Grade 1 classroom-function deadbolt with cylinder x thumbturn operation and a heavy duty rating, matching the 11C61 Maxum on grade, function, and duty level. The difference is the cylinder platform: the 11C61 runs Medeco M3 technology with a DL keyway, so it keys into an existing M3 or M4 hierarchy, while the D111 uses standard Falcon cylinders. On a school or office where the opening needs Grade 1 classroom operation but there is no Medeco master key system to join, the D111 covers the same function.

10) Is there a Grade 1 single cylinder deadbolt that keys into a Schlage C system instead of a proprietary keyway?

The Hager 3118 is a Grade 1 classroom deadbolt with a Schlage C keyway and a 6-pin cylinder, fitting doors 1-3/8 inch to 1-3/4 inch and carrying a fire rating. It is the option when a facility standardizes on Schlage C and every other cylinder on site is cut to that section. The Medeco 11C61 Maxum is also 6-pinned but runs the DL keyway on the M3 platform, which means patented key control and restricted blanks rather than an open commercial section. Note the door range: the 3118 stops at 1-3/4 inch, while the 11C61 covers 1-3/8 inch to 2-1/2 inch.

11) What deadbolt should be used on a door thicker than 2-1/4 inches if the Medeco 11C61 is not the right cylinder platform?

For thick doors, the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock rated for doors 1-3/4 inch to 2-1/4 inch, which is the widest range among the Grade 1 commercial deadbolts here apart from the Medeco 11C61 Maxum itself, which takes 1-3/8 inch to 2-1/2 inch. Most Grade 1 alternatives cap at 1-3/4 inch: the Design Hardware D1 Series is fixed at 1-3/4 inch, and the Dexter DB1000 tops out at 1-7/8 inch. On heavy commercial or institutional doors past 1-7/8 inch, the choice narrows to the 11C61 or the DL3011.

12) The 11C61 has a thumbturn inside. What takes its place when the opening needs a key on both sides?

The Medeco 11C61 Maxum is a single cylinder deadbolt, cylinder outside and thumbturn inside. Where the interior side must also be keyed, the Design Hardware D1 Series is a Grade 1 extra heavy duty double cylinder deadbolt for 1-3/4 inch doors, and the Dexter DB1000 double cylinder is Grade 1 for doors 1-3/8 inch to 1-7/8 inch. Double cylinder on an egress door is governed by the life safety code for the occupancy, so confirm the AHJ allows it before specifying either one.

13) Which deadbolts ship without a cylinder so an existing core can be installed?

The Medeco 11C61 Maxum is a fixed cylinder deadbolt with the M3 cylinder built in and pinned to the DL keyway, so it is not a less-core body. For a shop pinning its own cores, the Arrow E61 26D IC is a Grade 2 single cylinder deadlock with SFIC prep and no core supplied for doors 1-3/8 inch to 1-3/4 inch, the Delaney LM Series is a Grade 1 single cylinder less core deadbolt in dull chrome US26D, and the Deltana CL200LAIC is a Grade 2 single deadbolt with interchangeable core prep on a 2-3/4 inch backset. Those three take a core from your existing system; the 11C61 brings the Medeco cylinder with it.

14) Is there a Grade 1 deadbolt alternative to the Medeco 11C61 with a fire rated latch?

The Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch, cylinder x thumbturn. The Hager 3118 Grade 1 classroom deadbolt also carries a fire rating and fits doors 1-3/8 inch to 1-3/4 inch. The Medeco 11C61 Maxum is Grade 1 heavy duty and UL 437 listed, which is the attack resistance listing for the cylinder covering drilling, picking, and prying. The two listings answer different questions on a submittal, so a fire door assembly that also needs high security key control should be checked against both requirements.

15) Is there a Grade 1 deadbolt with an adjustable backset instead of ordering a fixed backset?

The Falcon D111 is a Grade 1 heavy duty classroom deadbolt with an adjustable backset, which covers 2-3/8 inch and 2-3/4 inch prep from one part number. The Accentra D111 is a Grade 1 single cylinder deadbolt supplied with a fixed 2-3/8 inch backset for doors 1-3/8 inch to 1-3/4 inch. The Medeco 11C61 Maxum is ordered to the backset: 2-3/8 inch or 2-3/4 inch, each with a 1 inch or 1-1/8 inch faceplate or a drive-in bolt. For a locksmith carrying stock to an unmeasured opening, the adjustable D111 avoids the callback; for a specified job the 11C61 is pinned to the exact prep on the door.

16) What does single cylinder mean on the 11C61, and is a thumbturn deadbolt allowed on my exit door?

Cylinder outside, thumbturn inside. Someone on the secure side throws and retracts the bolt by hand with no key, which is what most egress paths require. If you need to stop a burglar reaching through adjacent glass and turning it, that calls for a double cylinder instead, keyed both sides, and many jurisdictions restrict that on a required exit. Medeco also builds the Maxum in double cylinder and captive thumbturn versions for those openings.

17) What is the difference between the Pinned, Sub-Assembled, and Sub-Assembled No Slider options on a Medeco deadbolt?

Pinned means the cylinder arrives keyed and ready to hang. Sub-Assembled ships the cylinder unpinned so a Medeco-authorized locksmith pins it on site into your system, which is how most shops running their own Medeco keying order it. Sub-Assembled, No Slider leaves the slider out as well for shops that pin and assemble the full cylinder themselves. If nobody on your side is licensed to pin Medeco, order Pinned and give the key code.

18) Do I need a separate lockset with the Medeco Maxum deadbolt, or does it latch the door on its own?

A deadbolt only, with no latch and no handle. It secures the door but does nothing to hold it closed, so the opening also needs a knob, lever, or passage latch, or an existing one already in the lower bore. On a standard two-bore commercial door the Maxum takes the upper 2-1/8 inch bore and the lockset takes the lower one. If you would rather have one unit doing both, the Falcon H2101 is an interconnected entrance lock with a single cylinder deadbolt built in.

19) What is a lighter-duty alternative to the Medeco 11C61 Maxum deadbolt for an interior or low-traffic opening?

Stepping down from Grade 1, the Falcon D211 is a Grade 2 classroom-function deadbolt with single cylinder operation and a medium duty rating, keeping the same cylinder x thumbturn action as the 11C61 Maxum. Going lighter still, the Cal-Royal ED500 is a Grade 3 single cylinder deadbolt with an adjustable backset for doors 1-3/8 inch to 1-3/4 inch, and the Cal-Royal LSD is Grade 3 with an ADA ergonomic thumbturn. The 11C61 stays the choice where Grade 1 heavy duty and the M3 sidebar cylinder are called for; on a back-of-house or interior door the Grade 2 and Grade 3 options carry the same cylinder x thumbturn function.

20) Will an electronic deadbolt do the same job as the Medeco 11C61 Maxum?

It is a different category of lock, not a drop-in. The 11C61 Maxum is a mechanical Grade 1 deadbolt with an M3 sidebar cylinder and a thumbturn, and it carries no batteries or credentials. The Codelocks CL2200 is a medium duty electronic surface deadbolt, the Codelocks CL2210 is an electronic mortise deadbolt, the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override, and the Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote. Those manage access by code or credential and change how the door is administered. Where the requirement is key control and physical attack resistance on a patented key system, the mechanical 11C61 is the match.

21) Are the Emtek and Baldwin deadbolts a substitute for a Medeco 11C61 on a commercial opening?

They serve a different opening. The Emtek 2050 and 2051 are European mortise deadbolts with an integrated roller latch, and the Emtek #11 Tuscany is a lost wax cast bronze deadbolt; the Baldwin Estate 8011 is a 1-5/8 inch double cylinder deadbolt and the Baldwin Reserve line runs contemporary round and square double cylinder trim. Those are decorative and, in the Emtek mortise case, need a mortise pocket rather than a bored door. The Medeco 11C61 Maxum is a bored lockset installed in a standard 2-1/8 inch crossbore with a 1 inch edge bore per ANSI A115.13, carrying Grade 1 certification and heavy duty rating for commercial and institutional traffic.

22) Which of these parts look like deadbolt substitutes but will not lock a door on their own?

Several items in the same family are components, not complete locks. The Arrow 460 is a mortise lock strike with latchbolt and deadbolt cutouts and a straight lip for a 1-3/4 inch door, the BEST 8T is a T Series tubular deadbolt tube component, and the Baldwin Reserve 8BR0618001 is a deadbolt spacer for double cylinder trim. The DynaLock 1300 Series is a heavy duty mortise electric deadbolt that throws from a power supply and access control input rather than a key. If the requirement is a complete keyed deadbolt, the Medeco 11C61 Maxum is the bored deadbolt with cylinder, thumbturn, and bolt assembly, and the bolt itself is selectable by backset and faceplate or ordered less bolt assembly when the existing bolt is being reused.

23) What is the difference between the Medeco 11C61 and a Grade 2 commercial deadbolt like the Arrow DBX61 or Hager 3215?

Grade level and cylinder platform. The Arrow DBX61 is a Grade 2 single cylinder deadbolt with cylinder x thumbturn operation, and the Hager 3215 is a Grade 2 single cylinder deadbolt with a 1 inch throw for doors 1-3/8 inch to 1-3/4 inch. The Medeco 11C61 Maxum is ANSI/BHMA A156.36 Grade 1 with a heavy duty rating, a 1 inch solid steel bolt with a hardened steel shroud, and a 6-pin M3 sidebar cylinder on the DL keyway with patented key control. All three throw a bolt from a key outside and a turn inside; the 11C61 adds the higher grade certification and the restricted key system.

24) Can I get Medeco Maxum deadbolts to match the existing finishes across a building?

Thirteen finishes are offered on the Maxum deadbolt, covering the standard BHMA commercial numbers: 626 satin chrome and 625 bright chrome, 605 bright brass and 606 satin brass, 609 antique brass, 611 bright bronze, 612 satin bronze, 613 dark bronze oil-rubbed and 624 dark bronze, 618 bright nickel, 619 satin nickel, 20 antique nickel, and 622 flat black. For a multi-tenant or office retrofit, 626 is the usual match to existing commercial lever and deadbolt trim.

25) What single cylinder deadbolt matches the Medeco 11C61 on grade but comes in a narrower finish range?

The Deltana CL200LM is a Grade 1 single cylinder deadbolt with cylinder x thumbturn operation, and the Delaney LM Series Grade 1 single cylinder is offered in dull chrome US26D. Both hold Grade 1 like the Medeco 11C61 Maxum. Where the specification calls for a finish to match existing trim across a floor, the 11C61 runs thirteen finishes from 605 bright brass and 606 satin brass through 613 dark bronze oil-rubbed, 622 flat black, and 626 satin chrome, so a fleet standardizing on an unusual finish has more to select from.

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Does the Medeco MED-11C611T-26-DLT come with a warranty?

Absolutely. The Medeco MED-11C611T-26-DLT is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.

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Medeco 11C61 M3 Maxum Commercial Single Cylinder Deadbolt - 6-Pinned, DL Keyway, Classroom Function