ASSA ABLOY One System 72/55 Main Lock EN 12209 Stainless Steel Fire Door 20x235mm

Product Overview

The ASSA ABLOY One System 72/55 main lock with 20/235 mm rounded stainless steel faceplate is designed for fire-rated doors in commercial and public buildings. It features an 8 mm spindle hole for standard lever handle sets and complies with EN 12209, ensuring performance and safety in demanding environments. The lock undergoes testing for up to 1,000,000 operating cycles, meeting durability requirements for high-traffic applications.

Distinctive among category peers, this lock incorporates mounting holes with specialized notching to enhance resistance against screw loosening, reducing maintenance interruptions in busy installations. This makes it particularly suitable for specification in fire-door scenarios within hotels, offices, and institutional facilities requiring long-life mechanical reliability and EN 12209 compliance.

Key Features

• Stainless steel faceplate ? corrosion-resistant and durable, sized 20/235 mm with rounded profile


• Fire door compatible ? engineered for certified fire-rated door systems


• EN 12209 certified ? meets European mechanical lock safety standards


• 1,000,000 cycle tested ? verified long-term durability for high-traffic environments


• Universal handing ? suitable for both left- and right-handed door installations


• Anti-manipulation latch ? advanced construction prevents forced entry attempts


• Special fastening notch ? mounting holes designed to increase screw resistance to self-loosening

Technical Specifications

• Lock Type: Main lock for fire doors


• Spindle Hole: 8x8 mm


• Faceplate Material: Stainless steel


• Faceplate Dimensions: 20x235 mm, rounded


• Backset: 55 mm


• Center Distance: 72 mm


• Handing: Universal (P/L)


• Certification: EN 12209


• Tested Cycles: 1,000,000

Applications

Designed for fire-rated doors in commercial buildings, hotels, office complexes, and institutional settings. Suitable for installations where EN 12209 certification is a procurement requirement. Compatible with both left- and right-hand doors, OEM fire-door manufacturing, and bulk projects needing durable mechanical locks for intensive service.

Packaging & Shipping

Standard export packaging. Each unit includes the main lock body, mounting hardware, and installation instructions. Bulk packaging for OEM and large construction orders available on request.