Medeco 11R52W Maxum Residentia...
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Medeco Medeco Maxum Residential Double Cylinder Deadbolt, Biaxial, G3 Keyway MED-11R52W

Medeco 11R52W Maxum Residential Double Cylinder Deadbolt, Biaxial, G3 Keyway - UL 437 Listed, BHMA Grade 1

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Model: MED-11R523W-19-G3P
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Medeco 11R52W Maxum Residential Double Cylinder Deadbolt, Biaxial, G3 Keyway — UL 437 Listed & BHMA A156.5 Grade 1 Certified

The Medeco Maxum Residential Double Cylinder Deadbolt (Model 11R52W) is a heavy-duty, high-security deadbolt engineered for residential applications demanding the highest level of protection. Featuring Biaxial cylinder technology with the G3 Keyway, this deadbolt is UL 437 Listed and BHMA A156.5 Grade 1 Certified, delivering unmatched resistance against unauthorized key duplication, bumping, picking, drilling, wrenching, and physical attack. A solid 1" hardened steel bolt housed in heavy-gauge tubular steel fits doors 1 3/8" to 2 1/2" thick, with a standard 2 1/8" crossbore and 1" edge bore (ANSI A115.13 prep) for straightforward installation.

Key Features

  • Solid 1" Hardened Steel Bolt: A full 1" hardened steel bolt in heavy-gauge tubular steel housing provides maximum defense against physical attack, including crowbar and kick-in attempts.
  • Door Thickness Compatibility: Fits doors 1 3/8" to 2 1/2" thick with a standard 2 1/8" crossbore and 1" edge bore (ANSI A115.13 prep) for broad residential compatibility.
  • Medeco 4 (M4) Key Control: Patent-pending Medeco 4 design provides a utility patent protecting against unauthorized key duplication, including deterrence of 3D-printed key copies via a patent-pending movable element in the key.
  • Biaxial Cylinder Technology with G3 Keyway: Rotating pins and special angled key cuts add multiple dimensions of security, dramatically increasing key combinations and enabling some of the largest master key systems in the industry.
  • Drill & Pick Resistance: Hardened steel inserts, strategically placed drill pins, and solid-brass construction provide maximum drill and pick resistance per UL 437 standard.
  • Steel Shroud & High-Security Strike Plate: Steel shroud over bolt protects against "ice pick" type attacks; included high-security strike plate features a special box design with 2" screws anchoring directly to the building structure to prevent kick-in attacks.
  • Master Keying Capabilities: M4 deadbolts can be master keyed into systems including M4, M4 BiLevel, and M4 CLIQ keys and cylinders, supporting extremely large key systems.
  • Available Finishes: Offered in 14 finishes including Bright Brass (05), Satin Brass (06), Antique Brass (09), Satin Brass Blackened (10), Bright Bronze (11), Satin Bronze (12), Oil Rubbed Bronze (13), Bright Nickel (18), Satin Nickel (19), Antique Nickel (20), Black (22), Dark Bronze (24), Bright Chrome (25), and Satin Chrome (26).

Certifications & Compliance

  • UL 437 Listed — Protection against picking and drilling attacks
  • BHMA A156.5 Grade 1 Certified Deadbolt
  • ANSI/BHMA A156.30 Certification — Key control and unauthorized duplication protection
  • ANSI/BHMA A156.36 Grade 1 Listed Cylinders for high security
  • ANSI A115.13 Door Prep Compatibility (2 1/8" crossbore, 1" edge bore)

Technical Specifications

  • Series: Maxum® Residential Deadbolt
  • Cylinder Technology: Medeco Biaxial
  • Pinning: 5 or 6-Pin
  • Keyway: G3 Keyway
  • Certification: ANSI/BHMA A156.36 Grade 1 rated hardware platform
  • Bolt: 1" solid hardened-steel bolt in heavy-gauge steel housing
  • 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

  • Residential Entry Doors Requiring High-Security Key Control
  • Single-Family Homes with Master Key System Requirements
  • Multi-Unit Residential Properties with Controlled Access Needs
  • Upscale Residential Communities Demanding Grade 1 Protection
  • Vacation and Secondary Residences Requiring Unauthorized Duplication Deterrence
  • Home Offices and Private Studios with Sensitive Access Requirements
  • Residential Applications Requiring UL 437 Listed Security Hardware

Why Medeco?

Medeco Maxum deadbolts are built to the most rigorous security standards available, combining a solid 1" hardened steel bolt in heavy-gauge tubular steel housing with Biaxial cylinder technology and the patent-pending Medeco 4 key control system. UL 437 Listed and BHMA A156.5 Grade 1 Certified, the Maxum is engineered for residential environments where protection against physical attack, picking, drilling, and unauthorized key duplication is non-negotiable.

Manufacturer Resources

Medeco Product Catalog

Product Specs

Product Group:
Mechanical Locks
Series:
Maxum Series
Subcategory:
Deadbolts
Product Subgroup:
Bored Locksets
Product Type:
Deadbolts
Commercial/Residential:
Residential
Keyed:
Yes
Grade:
Grade 1
Duty Level:
Heavy Duty
Technology:
Biaxial
Keyed Function:
Double Cylinder
Lock Function:
Deadbolt
Product Model:
11R52W
Product Function:
Double Cylinder
Keyway Options:
G3 Keyway
Product Category:
Mechanical Locks
Department:
Door Hardware

Medeco MED-11R523W-19-G3P – Frequently Asked Questions

1) Will the Medeco Maxum 11R52W deadbolt fit a 2-inch thick door?
Yes. The Maxum 11R52W covers doors from 1-3/8 inches up to 2-1/2 inches thick, which is a wider range than most residential deadbolts handle. That takes in standard 1-3/4 inch entry doors, older 1-3/8 inch doors, and thick solid or insulated entry slabs up to 2-1/2 inches. Door prep is the usual 2-1/8 inch crossbore with a 1 inch edge bore, per ANSI A115.13, so an existing bored door normally takes it without new holes.
2) Which backset do I order for the Medeco 11R52W, 2-3/8 or 2-3/4?
Both are offered, each with a 1 inch faceplate, so measure from the door edge to the center of the existing 2-1/8 inch crossbore before ordering. Residential entry doors are commonly 2-3/8 inches; 2-3/4 is the other standard and shows up on heavier or commercial-style prep. Getting this wrong is the most common reason a deadbolt will not drop into an existing hole.
3) Is a double cylinder deadbolt like the Medeco 11R52W legal on a residential exit door?
The 11R52W is key-operated on both sides, with no thumbturn, so a key is required to get out as well as in. That is what people want on a door with glass beside it or a sidelight, because breaking the glass and reaching through does not open it. It also means occupants cannot exit without the key, and many local codes restrict double cylinder hardware on a required egress door in a dwelling. If your opening must permit key-free egress, order a single cylinder version with a thumbturn instead.
4) Can I put the Medeco Maxum on a master key system with my other Medeco locks?
Yes, and that is the main reason locksmiths spec it. The 11R52W uses Medeco Biaxial cylinders in the G3 keyway, with rotating pins and angled key cuts that multiply the available combinations, and M4 deadbolts can be master keyed into systems built on M4, M4 BiLevel, and M4 CLIQ keys and cylinders. That lets one deadbolt sit under an existing top master. Cylinders come 5-pin or 6-pin, so match the pinning to the system you already run.
5) I need a Grade 1 double cylinder deadbolt but not restricted keying. What else is there?
Several. The Design Hardware D1 Series double cylinder is Grade 1 and extra heavy duty, rated for 1-3/4 inch doors. The Dexter DB1000 double cylinder is Grade 1 and covers 1-3/8 to 1-7/8 inch doors. Step down a grade and the Hager 3214 is a Grade 2 double cylinder in the Schlage C keyway for 1-3/8 to 1-3/4 inch doors, which is the easy answer when you want keys cut at any hardware store. The tradeoff is exactly that: none of those give you the patented key control or the UL 437 listing the Maxum carries.
6) My door is thicker than 1-3/4 inches. Which deadbolts actually cover that?
Door thickness is where most deadbolts run out first. The Medeco Maxum 11R52W goes to 2-1/2 inches, the widest range in the group. The Corbin Russwin DL3011 Grade 1 cylindrical deadlock covers 1-3/4 to 2-1/4 inches. The Deltana 7312KA2 double cylinder covers 1-3/8 to 2 inches at Grade 3. Most of the rest, including the Dexter DB2000 and the Hager 3215, stop at 1-3/4 inches and will not make up the extra thickness.
7) Can I retrofit the Medeco 11R52W into a door that already has a deadbolt?
Usually yes, and that is the point of the ANSI A115.13 prep: a 2-1/8 inch crossbore with a 1 inch edge bore is the standard bored deadbolt prep, so the Maxum drops into a door already cut for one. Two things to verify first: the backset of the existing hole, since the deadbolt is ordered as either 2-3/8 or 2-3/4, and the door thickness, which must land between 1-3/8 and 2-1/2 inches. The included box strike will want a deeper jamb mortise than a thin residential strike, so plan on chiseling the jamb.
8) What is the closest Grade 1 double cylinder deadbolt to the Medeco 11R52W Maxum if high-security key control is not required?
The Design Hardware D1 Series double cylinder deadbolt (D1-D) is a Grade 1 double cylinder deadbolt rated extra heavy duty for doors 1-3/4 inch thick. The Medeco 11R52W Maxum is also a Grade 1 double cylinder deadbolt, but it runs a Medeco Biaxial cylinder in the G3 keyway with UL 437 listing and fits doors 1-3/8 inch to 2-1/2 inch. If the opening needs key duplication control and drill and pick resistance, the Maxum is the one that carries it; if the requirement is only a Grade 1 keyed-both-sides bolt on a standard 1-3/4 inch door, the D1 Series covers that function.
9) Which double cylinder deadbolt should I use on a thick door that the Dexter DB1000 will not fit?
The Dexter DB1000 double cylinder deadbolt (DB1000-DCT) is a Grade 1 double cylinder unit for doors 1-3/8 inch to 1-7/8 inch thick, so a door above 1-7/8 inch is outside its range. The Medeco 11R52W Maxum is a Grade 1 double cylinder deadbolt that fits doors 1-3/8 inch to 2-1/2 inch thick using a standard 2-1/8 inch crossbore and 1 inch edge bore, which covers heavier entry doors in the same bored prep.
10) I need a keyed deadbolt with a thumbturn inside instead of a key both sides - what takes the place of the Medeco 11R52W?
The Medeco 11R52W Maxum is a double cylinder deadbolt, keyed on both sides. Where egress or code requires an inside thumbturn, the Falcon D111 is a Grade 1 heavy duty cylinder x thumbturn deadbolt with adjustable backset, the Delaney LM Series 301702 is a Grade 1 cylinder x thumbturn deadbolt supplied less core in dull chrome US26D, and the Deltana CL200LM is a Grade 1 single cylinder deadbolt. All three keep Grade 1 while turning the interior side to a thumbturn.
11) The drawing calls for a fire rated deadbolt - does the Medeco 11R52W Maxum meet that, or should I look at a Hager?
The Medeco 11R52W Maxum is certified BHMA A156.5 Grade 1 and UL 437 Listed for pick and drill resistance, and it is designated for residential use. Where the opening needs a fire rating, the Hager 3214 double cylinder deadbolt carries a fire rating and fits doors 1-3/8 inch to 1-3/4 inch with the Schlage C keyway. Match the deadbolt to whichever the drawing is actually calling out - the attack and key control listings or the fire rating.
12) I want to standardize a whole building on one keyway - does the Medeco Maxum or a Schlage C keyway deadbolt make more sense?
The Medeco 11R52W Maxum uses the Medeco Biaxial cylinder in the G3 keyway and can be master keyed into M4, M4 BiLevel, and M4 CLIQ systems, which is the route when the facility wants one restricted key hierarchy across units. If the building is already standardized on a conventional Schlage C keyway, the Hager 3215 single cylinder deadbolt and Hager 3118 Grade 1 classroom deadbolt with 6-pin cylinder both run Schlage C and fit doors 1-3/8 inch to 1-3/4 inch. The choice is whether the site is keying to a restricted system or matching an existing conventional keyway.
13) Which deadbolt do I use where no key is wanted on the inside for egress?
The Medeco 11R52W Maxum is keyed on both sides, which is not the right choice where an occupant must exit without a key. The Arrow E60 is a Grade 2 non-keyed exit deadlock, blank plate outside by thumbturn inside, for doors 1-3/8 inch to 1-3/4 inch, and the Callan 205S is a Grade 3 one-sided half-bore deadbolt. Both remove the outside keyed operation the Maxum provides.
14) What is the difference between ordering the Medeco 11R52W pinned versus sub-assembled?
Pinned means the cylinder arrives combinated and ready to hang. Sub-assembled means it ships without being pinned to a combination, which is what a locksmith with a Medeco license wants when the cylinder has to be cut into an existing G3 keyway or master key system in-house. If nobody on your side pins Medeco cylinders, order pinned. You also choose the keying arrangement: keyed different, keyed alike across a group of doors, or to a specific key code you supply.
15) Does the Medeco Maxum deadbolt come with a strike plate, or do I need to buy one?
A high-security strike plate is included. It uses a box design with 2 inch screws that anchor through the jamb into the framing rather than stopping at the trim, which is what actually resists a kick-in. The bolt itself is a solid 1 inch hardened steel bolt in a heavy-gauge tubular steel housing, with a steel shroud over the bolt against ice-pick attacks. Buy the strike separately only if you are replacing a damaged jamb strike on another door.
16) Is the Medeco 11R52W actually pick and drill resistant, or is that just marketing?
It is UL 437 Listed, which is the test standard for resistance to picking and drilling, and it carries BHMA A156.5 Grade 1 certification as a deadbolt. The hardware also holds ANSI/BHMA A156.30 for key control against unauthorized duplication and A156.36 Grade 1 for high security cylinders. Physically that comes from hardened steel inserts, placed drill pins, and solid brass cylinder construction. The patent-pending Medeco 4 design carries a utility patent restricting key duplication, including a movable element in the key that deters 3D-printed copies.
17) Is the Medeco Maxum too much lock for a rental unit, and what would I use instead?
For a rental turn where you rekey between tenants and nobody is running a key control program, the Maxum is more lock than the job needs, and its restricted keys mean you cannot cut a spare at a big-box store. A Cal-Royal CB160 Grade 2 single cylinder with a tamper-resistant cylinder guard or a Dexter DB2000 Grade 2 covers a standard 1-3/8 to 1-3/4 inch door. Where the Maxum earns its place is a portfolio you want on one master key system with keys that cannot be copied by a departing tenant or contractor.
18) What is a lighter-duty double cylinder deadbolt alternative to the Medeco Maxum 11R52W?
The Dexter DB2000 double cylinder deadbolt (DB2000-DCT) is a Grade 2 double cylinder deadbolt for doors 1-3/8 inch to 1-3/4 inch, and the Delaney LU Series double cylinder deadbolt is Grade 2 in a stainless steel US32D finish. The Medeco 11R52W Maxum is Grade 1 with a Biaxial cylinder in the G3 keyway. The Grade 2 units answer the same keyed-both-sides function on a standard residential door; the Maxum adds the higher grade and the restricted keyway.
19) Is the Baldwin Reserve Double Cylinder Contemporary Round Deadbolt the same thing as the Medeco 11R52W?
Both are double cylinder deadbolts, so they perform the same keyed-both-sides function, but they are not the same part. The Baldwin Reserve Double Cylinder Contemporary Round Deadbolt is a decorative-trim double cylinder unit, as is the Baldwin Reserve Contemporary Square version. The Medeco 11R52W Maxum is a Grade 1 double cylinder deadbolt built on the Biaxial cylinder in the G3 keyway with UL 437 listing and a 1 inch hardened steel bolt. If the specification calls out a restricted keyway and key control, the Baldwin Reserve units will not satisfy it.
20) What double cylinder deadbolt fits a door up to 2 inches thick if I do not need Grade 1?
The Deltana 7312KA2 is a Grade 3 double cylinder deadbolt covering doors 1-3/8 inch to 2 inch. The Medeco 11R52W Maxum is a Grade 1 double cylinder deadbolt covering 1-3/8 inch to 2-1/2 inch, so it reaches further up the thickness range and carries the higher grade along with the Biaxial G3 cylinder.
21) What double cylinder deadbolt should I look at for a commercial cylindrical deadlock opening rather than a residential entry?
The Medeco 11R52W Maxum is designated for residential applications. For a commercial cylindrical deadlock, the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock in cylinder x blank for doors 1-3/4 inch to 2-1/4 inch, and the DL3211 is the Grade 1 cylindrical deadlock for 1-3/4 inch doors. Those are keyed one side with a blank plate opposite, so confirm the opening does not require key operation from both sides before substituting.
22) Is an electronic deadbolt a drop-in replacement for the Medeco 11R52W Maxum?
No. The Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote, and the Codelocks CL2210 is an electronic mortise deadbolt - both change how the door is operated and, in the CL2210 case, the door prep as well. The Medeco 11R52W Maxum is a mechanical Grade 1 double cylinder deadbolt keyed on both sides in a standard 2-1/8 inch crossbore with 1 inch edge bore, so it stays within the existing bored prep and the existing key system.
23) Will the Medeco Maxum finish match the rest of the hardware in my building?
Twelve finishes are offered: Antique Nickel (20), Bright Brass (605), Satin Brass (606), Antique Brass (609), Satin Brass Blackened (610), Satin Bronze (612), Dark Bronze Oil-Rubbed (613), Satin Nickel (619), Flat Black (622), Dark Bronze (624), Bright Chrome (625), and Satin Chrome (626). For matching a fleet of doors, 626 satin chrome and 619 satin nickel are the two that pair with most existing commercial and residential trim.
24) Is the Baldwin 8BR0618001 deadbolt spacer an alternative to the Medeco 11R52W Maxum deadbolt?
No. The Baldwin Reserve 8BR0618001 is a deadbolt spacer - a component listed under the double cylinder function but not a working lock. The Medeco 11R52W Maxum is the complete double cylinder deadbolt itself, with the 1 inch hardened steel bolt, cylinder, and high-security strike plate. The same distinction applies to the BEST 8T T Series tubular deadbolt tube component, which is the tube assembly rather than a finished deadbolt.
25) What is a double cylinder deadbolt with a decorative or contemporary look next to the Medeco 11R52W Maxum?
The Emtek 8323 Modern Disc double cylinder deadbolt is a brass disc-trim double cylinder unit, the Baldwin Estates 8011 is a contemporary 1-5/8 inch double cylinder deadbolt, and the Callan 210S is a Grade 3 double cylinder deadbolt. All four, including the Medeco 11R52W Maxum, are keyed on both sides; the Maxum is the Grade 1 unit with the Biaxial G3 high-security cylinder and is offered in 12 finishes including 613 Dark Bronze Oil-Rubbed, 622 Flat Black, and 605 Bright Brass if the goal is matching existing trim without giving up the grade.
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Does the Medeco MED-11R523W-19-G3P come with a warranty?
Absolutely. The Medeco MED-11R523W-19-G3P is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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