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Medeco 105500T M3 Standard 6-Pin Mortise Cylinder, 2"–5" Length, Straight Cam, DL KeywayThe Medeco 105500T is an M3 technology, 6-pin mortise cylinder engineered for high-security commercial...
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Medeco 100100 Original Mortise Cylinder — 1" 5-Pin DL Keyway with Patented Key Control
The Medeco 100100 Original Mortise Cylinder is a high-security, 5-pin, 1" brass mortise cylinder engineered for commercial-grade access control. Featuring threaded exterior shell construction, this cylinder is designed to screw directly into other manufacturers' mortise lock cases — including standard Yale and Adams Rite hardware — with a rear cam that operates the lock mechanism and a set screw that secures the cylinder in place. UL 437 listed for drill and pick resistance, the Medeco 100100 delivers exceptional physical attack protection and patented key control through the Medeco 4 (M4) platform.
Key Features
- 1" Mortise Cylinder Format: Threaded exterior shell designed to screw into compatible mortise lock cases from Yale, Adams Rite, and other standard manufacturers for broad retrofit compatibility.
- 5-Pin DL Keyway Configuration: Utilizes a 5-pin tumbler system with Medeco's DL keyway, requiring Medeco-specific key blanks and a special key cutting machine to prevent unauthorized duplication.
- Patented Key Control (M4): Medeco 4 (M4) technology protects against unauthorized key duplication, providing utility-patented key control for enhanced security management.
- UL 437 Listed — Drill & Pick Resistance: Certified to UL 437 standards, the cylinder withstands drilling, picking, bumping, and other forms of physical attack for maximum security assurance.
- Sidebar Picking & Bump Protection: The M4 sidebar mechanism prevents key rotation until the key is elevated, rotated, and aligned in the correct position, offering robust protection against bumping and picking attacks.
- Master Key System Compatible: Can be masterkeyed into a system containing M4 BiLevel cylinders, supporting complex keying hierarchies for commercial facilities.
- Brass Construction: Manufactured from brass for long-lasting durability and corrosion resistance in demanding commercial door hardware applications.
- Retrofits Existing Hardware: M4 cylinders are available in a wide variety of formats, making it straightforward to upgrade existing hardware on the market today without full lock replacement.
Certifications & Compliance
- UL 437 Listed — Drill and Pick Resistance
- Commercial Grade Application
Technical Specifications
- Product Type: Standard Mortise Cylinder
- Pinning: 5-Pin
- Length: 1"
- Compatibility: Standard Yale and Adams Rite mortise hardware
- Certification: UL 437 Listed (M4)
- Construction: Precision-machined solid brass
- Warranty: 2-year manufacturer's warranty
Typical Applications
- Commercial Office Buildings
- Educational Facilities
- Healthcare Institutions
- Government and Municipal Buildings
- Retail Establishments
- Multi-Tenant Residential Properties
- Industrial and Warehouse Facilities
Why Medeco?
Medeco mortise cylinder products are built from brass and certified to UL 437 for drill and pick resistance, delivering professional-grade security for the most demanding commercial applications. The M4 platform's sidebar mechanism and patented key control technology ensure that only authorized keys can operate the lock, making the Medeco 100100 an ideal choice for facilities requiring both physical attack resistance and strict key management control.
Manufacturer Resources
Medeco Product Catalog
Product Specs
- Subcategory:
- Mortise
- Product Group:
- Parts and Accessories
- Product Subgroup:
- Cylinders
- Product Type:
- Mortise Cylinder
- Cylinder and Keyways:
- DL Keyway, 5-Pin
- Commercial/Residential:
- Commercial
- Lock Type:
- Mortise
- Product Model:
- MED-100100
- Product Category:
- Parts and Accessories
- Product Substrate:
- Brass
- Department:
- Door Hardware
Medeco 100100-26-00P-Z01 – Frequently Asked Questions
1) Will a Medeco 100100 mortise cylinder screw into my existing Yale or Adams Rite mortise lock?
Yes. The Medeco 100100 is a 1 inch threaded-shell mortise cylinder built to thread directly into other manufacturers' mortise lock cases, including standard Yale and Adams Rite hardware. You do order for one or the other though: the cylinder is supplied in a CT-Z01 Standard Yale version and a CT-Z02 Adams Rite version, and the difference is the rear cam that drives the lock mechanism. Pick the cam that matches the case you are putting it into. The cylinder is held in the case by a set screw once threaded to depth.
2) What is the difference between the CT-Z01 and CT-Z02 options on the Medeco 100100 cylinder?
They are cam options, not sizes. CT-Z01 is the Standard Yale configuration and CT-Z02 is the Adams Rite configuration. Both are the same 1 inch 5-pin DL keyway brass cylinder underneath. Adams Rite cases (the usual aluminum storefront and narrow stile hardware) take a different cam than a standard Yale mortise case, so the wrong choice threads in fine but will not throw the lock. Confirm which case is in the door before you order.
3) Is a 1 inch mortise cylinder long enough for my door, or do I need a longer one?
One inch is the base mortise cylinder length and it suits a standard mortise lock case with no thick decorative trim stacked on the face. If the door carries a heavy escutcheon, an armored front, or a thick wrap, the 1 inch body can end up sitting proud or not reaching the cam properly, and you want a longer cylinder instead. The rule of thumb: the cylinder face should finish flush to slightly proud of the trim, never recessed. Measure from the outside face of the finished trim to the cam seat in the case before committing to 1 inch.
4) Can the Medeco 100100 be keyed into an existing Medeco master key system?
It can be masterkeyed into a system that contains M4 BiLevel cylinders, so a facility already standardized on the Medeco 4 platform can bring these into the same hierarchy rather than running a second set of keys. It is a 5-pin DL keyway, so the system it joins has to be a DL keyway system. Master keying is set up when the cylinder is pinned, not in the field.
5) Why can't a hardware store copy a Medeco DL key, and what does that mean for managing my building?
The DL keyway runs on Medeco's M4 platform, which is a utility patented key control system. Blanks are restricted to Medeco and cutting them takes a special key cutting machine, so a tenant or employee cannot walk into a hardware counter and run a duplicate. For a property manager or a facility with turnover, that is the whole point: the key count stays what your records say it is, and rekeying is driven by your decision rather than by an uncontrolled copy showing up.
6) Is the Medeco 100100 mortise cylinder UL 437 listed for drill and pick resistance?
Yes, UL 437 listed for drill and pick resistance on the M4 platform. That covers drilling, picking and bumping attack. The M4 sidebar adds a second layer: the key has to be elevated, rotated and aligned before the plug will turn at all, which is what defeats bumping. For a spec that calls for a high security cylinder with a listed attack rating, this one carries it on paper.
7) Do I have to replace the whole mortise lock to upgrade to high security Medeco keys?
No. The 100100 is a cylinder-only swap: back out the set screw, unthread the existing 1 inch mortise cylinder, thread this one in and reset the screw. The lock case, trim and door prep stay where they are. M4 cylinders come in a range of formats specifically so existing hardware can be upgraded without a full lock replacement, which is how a facility converts a building of mixed hardware onto one key system over time instead of all at once.
8) What finishes does the Medeco 100100 mortise cylinder come in?
Fourteen finishes, and they run across both the Yale and Adams Rite cam versions: 605 Bright Brass, 606 Satin Brass, 609 Antique Brass, 610 Satin Brass Blackened, 611 Bright Bronze, 612 Satin Bronze, 613 Dark Bronze Oil-Rubbed, 618 Bright Nickel, 619 Satin Nickel, 20 Antique Nickel, 622 Flat Black, 624 Dark Bronze, 625 Bright Chrome and 626 Satin Chrome. That range covers matching an existing opening, whether the rest of the trim is 626 satin chrome on commercial aluminum or 613 oil-rubbed on a hospitality entry.
9) Will a 5-pin Medeco DL cylinder work on the same key as my 6-pin Medeco cylinders?
Not automatically. The 100100 is a 5-pin cylinder in the DL keyway, and pin count and keyway both have to line up with the system you are joining. Where it does slot in cleanly is a system built with M4 BiLevel cylinders, which it can be masterkeyed into. If your existing Medeco stock is a different keyway or pin count, have your locksmith or Medeco dealer confirm the system before ordering, because the pinning is set at the factory or at the bench, not on the door.
10) What is a mortise cylinder and how is it different from a rim cylinder?
A mortise cylinder like the Medeco 100100 has a threaded body that screws into the lock case itself and turns a cam on the back to drive the lock. A rim cylinder instead mounts through the door from the inside with a tailpiece and screws, and is what sits behind a rim exit device or a surface-mounted deadlock. They are not interchangeable. If you are looking at the edge of the door and the lock body is buried inside a pocket in the door, that is a mortise case and this is the cylinder for it.
11) Do I need anything else to install the Medeco 100100, or will it come with the key?
The cylinder is supplied pinned and keyed on the Medeco DL keyway with its keys, and it is held in the lock case by a set screw, so the mechanical install needs nothing more than a screwdriver and the correct cam version for your case. What it does not include is the lock case, trim, or any additional key blanks. Extra keys have to be cut on Medeco equipment with restricted blanks, so plan the key count with your order rather than expecting to add copies locally later.
12) Is the Medeco 100100 suitable for a high traffic commercial entrance?
It is a commercial-grade cylinder, machined from solid brass, which is what gives it wear life and corrosion resistance on an exterior or high cycle opening. The usual homes for it are office buildings, schools, healthcare, government and municipal work, retail, multi-tenant residential, and industrial or warehouse facilities. Brass is also what lets the plated finishes hold up rather than flaking off a pot metal body.
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Does the Medeco 100100-26-00P-Z01 come with a warranty?
Absolutely. The Medeco 100100-26-00P-Z01 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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