Gerda PRO System WKM4 Cylinder Insert 40/50mm Satin Nickel EN 1303 Class 6 D

Product Overview

Gerda PRO System Cylinder Insert (WKM4) is a high-security anti-burglary cylinder designed for use with mortise locks in residential, commercial, and fire-rated door settings. It is certified to PN-EN 1303:2015-07 and tested by the Institute of Precision Mechanics in Warsaw, achieving class 6 D for top-tier security, mechanical durability, and resistance against forced entry. Satin nickel finish provides corrosion resistance across a wide temperature range from -20°C to +80°C.

This insert features certified protection against drilling, bumping, and picking, setting it apart from standard cylinders. Its combination of steel-reinforced anti-drill elements and additional top pins addresses procurement risks related to compliance for fire and smoke doors. Particularly recommended for facility managers and door manufacturers requiring units for bulk installation in fire-rated or smoke-control assemblies.

Key Features

• Anti-drill protection ? internal cylinder shielded by hardened steel plate (Class D certified)


• Anti-bumping ? special pins and needle system prevent unauthorized key manipulation


• Mechanical durability ? 6 tumblers, tested for over 100,000 operating cycles (Class 6)


• Certified security ? PN-EN 1303:2015-07 classification 1 6 0 B 0 C 6 D


• Wide temperature range ? operates reliably from -20°C to +80°C (Class C)


• Fire and smoke door approved ? suitable per IMP certification and national requirements


• Over 2,700,000 key code combinations ? enhanced resistance to unauthorized duplication

Technical Specifications

• Cylinder Length: 40/50 mm


• Finish: Satin Nickel


• Number of Tumblers: 6


• Key Combinations: >2,700,000


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


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


• Certification: Institute of Precision Mechanics (IMP), Warsaw


• Resistance to Drilling: Class D (5/10 min)


• Mechanical Durability: >100,000 cycles


• Corrosion Resistance: Class C


• Approved for: Fire and smoke-control doors


• Included Accessories: 5 drilled keys, code card, fixing screw

Applications

Used in residential and commercial buildings, this cylinder insert is intended for security upgrades of mortise locks on exterior and interior doors. Its certifications allow installation on fire-rated and smoke-control doors in multi-family housing, offices, hotels, and industrial facilities. Suitable for OEM manufacturing and bulk procurement projects where compliance to PN-EN 1303 and IMP certification is required.

Packaging & Shipping

Each unit is packed in a sealed box containing the cylinder insert, 5 drilled keys, a code card, fixing screw, and full documentation. Tamper-evident packaging ensures compliance and original security integrity during shipping. Bulk orders are available for facility and OEM buyers.