Medeco 100100 Original Mortise Cylinder, 1" 5-Pin DL Keyway with Patented Key Control, Compatible with Standard Yale and Adams Rite

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.