Gerda PRO System X WKM4Z Cylinder Lock Insert 30/40 Nickel Class D Attack Resistant

Product Overview

The Gerda PRO System X (WKM4Z) cylinder lock insert with 30/40 dimensions and gear, finished in nickel, is designed as an anti-burglary security component for mortise locks in high-security environments. Extensively tested by the Instytut Mechaniki Precyzyjnej and compliant with PN-EN 1303:2015-07, this cylinder holds mechanical, security, and corrosion resistance certifications at the highest available classification, and is accepted for use in fire-rated and smoke-control doors.

The standout feature of this insert is its unmatched class D attack resistance (5/10 minutes drilling and mechanical attack protection), providing extended defense time against intrusions that mitigates major risks for facility managers and B2B buyers responsible for high-value or regulatory-driven security projects. This performance, along with the included anti-bumping, anti-lockpicking, and precision-manufactured anti-drill elements, makes this SKU especially suited for commercial or institutional bulk procurement where certified, tamper-resistant door hardware is mandatory.

Key Features

• Class D attack resistance ? withstands 5/10 minutes of drilling and mechanical force attacks per certification


• Highest mechanical durability ? over 100,000 operating cycles per PN-EN 1303:2015-07 standard


• Advanced key code security ? over 2,700,000 possible key combinations offer elevated access control


• Anti-bumping and anti-lockpicking ? additional upper pins and special internal elements block common break-in methods


• Certified for fire and smoke doors ? suitable for integration in fire-protection certified entryways


• Operating temperature -20°C to +80°C ? ensures consistent performance in both heated and unheated buildings


• Corrosion resistance class C ? withstands harsh and high-humidity environments

Technical Specifications

• Model: WKM4Z


• Lock Type: Cylinder lock insert with gear


• Dimensions: 30/40 mm


• Material/Finish: Nickel


• Certification: PN-EN 1303:2015-07 (classification: 1 6 0 B 0 C 6 D)


• Attack resistance: Class D (5/10 min drilling/mechanical attack)


• Security grade: Class 6 (highest)


• Key code combinations: >2,700,000


• Number of pins: 6


• Durability: >100,000 cycles


• Operating temperature: -20°C to +80°C


• Corrosion resistance: Class C (highest)


• Key type: Dimple keys (set of 5 included)


• Packaging: Sealed box with tamper-evident sealing


• Fire and smoke door approval: Yes

Applications

Used in commercial, industrial, and institutional buildings, the Gerda PRO System X WKM4Z cylinder is intended for high-security doors?including those in offices, public agencies, banks, and critical infrastructure?requiring anti-burglary, certified inserts. Its fire and smoke door approvals allow for application in fire-rated door assemblies and emergency escape routes. Suited for bulk procurement in new builds or retrofitted security upgrades where compliance with EN 1303 and attack resistance are required.

Packaging & Shipping

Each unit is sealed in a tamper-evident box and includes the cylinder insert, five dimple keys, code card, mounting screw, and user documentation. Packaging prevents unauthorized access and supports audit trails for certified installations.