Gerda PRO System WKM4 Profile Cylinder 30/40 Brass Class D Anti-Drilling EN 1303

Product Overview

The Gerda PRO System (WKM4) 30/40 brass profile cylinder is used in mortise lock doors for enhanced security in residential and commercial settings. Certified to PN-EN 1303:2015-07 by the Institute of Precision Mechanics in Warsaw, this cylinder achieves classification 1 6 0 B 0 C 6 D, offering top levels of mechanical durability, anti-corrosion, and anti-burglary protection even in high-traffic or demanding environments. Approved for use in fire- and smoke-rated doors.

A key differentiator of this model is its class D anti-drilling protection, which ensures resistance to both mechanical and drilling attacks for a minimum of 5?10 minutes, meeting strict site security requirements. This feature lowers risk for facility managers and bulk specifiers tasked with door hardware procurement for secure buildings, making it highly suitable for fire-rated door installations in offices, hotels, and apartment complexes.

Key Features

• Class D anti-drilling ? minimum 5?10 minutes resistance to drilling and mechanical attacks


• PN-EN 1303:2015-07 certified ? tested by Institute of Precision Mechanics, Warsaw


• Cycling durability ? rated for over 100,000 opening/closing cycles with 6 tumbler mechanism


• Key code combinations ? exceeds 2,700,000 code variations for enhanced key security


• Fire door approved ? suitable for fire-rated and smoke-control doors


• Anti-bumping needles ? resists forced entry techniques like bumping and picking


• Dual-diameter locking pins ? additional anti-burglary bar for extra protection

Technical Specifications

• Type: Profile cylinder (WKM4)


• Material: Brass


• Size: 30/40 mm


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


• Certification: Institute of Precision Mechanics, Warsaw


• Number of Tumblers: 6


• Key Combinations: 2,700,000+


• Cycling Durability: 100,000+ cycles


• Corrosion Resistance: Class C (up to -20°C/+80°C)


• Anti-Drilling Protection: Class D


• Included Keys: 5 drilled keys


• Fire Door Suitability: Yes


• Finish: Brass

Applications

Widely used in entrance doors for residential, office, hotel, and institutional buildings requiring certified anti-burglary protection. Compatible with fire-rated and smoke-control doors. Ideal for bulk installation in secure facilities, renovation projects, and OEM door manufacturing where compliance with PN-EN 1303:2015-07 and high mechanical security is required.

Packaging & Shipping

Each cylinder is sealed in a tamper-evident box including 5 drilled keys, code card, mounting screw, and installation instructions. Standard export packaging prevents damage and ensures product integrity. Bulk shipment options are available for large projects.