Heavy-Duty Solid Brass Double Key Cylinder
EN 1303:2015 Certified | Precision Pin-Tumbler Architecture | OEM / Master Key Systems
Technical Overview & Core Specifications
Engineered for commercial perimeter doors and institutional access control, this Double Key Cylinder operates via key from both exterior and interior sides to prevent unauthorized egress bypass. Constructed from extruded solid brass with modular cam integration, it fits standard DIN Euro-profile mortise locks.
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Profile Standards |
Euro Profile (DIN 18252), UK Oval, and US Mortise formats. |
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Length Range |
60 mm (30/30) to 120 mm (60/60) in 5 mm increments. |
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Durability Grade |
Certified to 100,000 operational cycles (EN 1303). |
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Corrosion Performance |
Grade 3 (96-hour neutral salt spray test per ASTM B117). |
Product Configuration Matrix
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Specification Category |
Standard Configuration |
Custom / OEM Options |
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Cylinder Body |
Extruded Solid Brass (CuZn40Pb2) |
Hot-Forged Solid Brass / SS304 Casing |
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Surface Finishing |
Satin Nickel (SN), Polished Brass (PB) |
PVD Black, Antique Bronze, Chrome Plated |
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Pin Architecture |
5 to 6-Pin High-Precision Brass Stack |
Hardened Steel Anti-Drill Pins (1-3 rows) |
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Keyway Profile |
Euro Standard / Schlage C / Kwikset |
Restricted Profile (Patent-Protected Blanks) |
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Key Blanks |
Nickel Silver / Solid Brass (2.2 mm thick) |
Reversible Dimple Keys, Laser Cut |
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Cam Mechanism |
Sintered Steel / Hardened Cast Steel |
Emergency Clutch Function (Danger Function) |
Application & Life-Safety Suitability
Perimeter Glass Doors: Double-keyed operation prevents intruders from breaking glass panels and manually turning an internal thumbturn.
Institutional Facilities (Schools & Hospitals): Integrates into Grand Master Key (GMK) hierarchies to segregate staff access while retaining emergency override.
Multi-Tenant Commercial Buildings: Combines tenant-specific keying with centralized facility management master keys.
Fire-Rated Doors: Complies with fire door integrity requirements when matched with certified DIN mortise locks.
Manufacturing & Quality Control Protocols
Dimensional Machining: Hot forging and high-speed CNC multi-axis milling maintain critical body and plug tolerances within +/- 0.02 mm.
Pin Calibration: Automated pin-sorting equipment calibrates pin lengths to 0.01 mm increments, minimizing friction and key insertion wear.
Attack Resistance: Hardened steel anti-drill pins and fracture-resistant snap-lines are built into the core housing to resist physical forcing.
Validation Testing:
Torque test benches verify breaking and twisting thresholds up to 15 Nm.
Automated picking and tension probes test mechanical pick resistance.
Salt spray chambers verify plating adherence and corrosion limits.
Factory Capabilities & B2B Supply Terms
Monthly Output: 150,000 units across 12 automated CNC assembly lines.
OEM/ODM Customization: Custom laser branding, proprietary keyway profiling, and bespoke packaging for hardware distributors.
Key Coding Security: Encrypted algorithmic database management for Keyed Alike (KA) and Master Key (MK) matrices, ensuring zero key code duplication within designated regional distribution zones.
Regulatory Compliance: CE marked, EN 1303:2015 certified, ISO 9001:2015 quality management system compliant.
Frequently Asked Questions
Q: What is the standard production lead time for bulk and master-keyed orders?
A: Standard catalog orders require 25 to 30 days. Custom master key systems or restricted keyway configurations require 35 to 45 days, which includes pin matrix programming and sample validation testing.
Q: Can cylinders be configured with an emergency function?
A: Yes. An emergency clutch function is available, allowing a key to operate the cylinder from the outside even if another key is inserted and turned inside.
Q: What is the Minimum Order Quantity (MOQ) for custom finishes or branding?
A: The MOQ is 500 units per finish/size for laser marking and custom packaging. For proprietary keyway profiles or master key systems, the MOQ starts at 2,000 units.
Q: How is key code security managed across separate shipments?
A: All key charts and codes are generated via compartmentalized, encrypted software to prevent duplication of Keyed Different (KD) or Master Key (MK) setups across regional client territories.