dormakaba GROOM GR-3500 Door Closer Sliding Rail EN 3-5 Black Asymmetrical Gear

Product Overview

The dormakaba GROOM GR-3500 door closer with a sliding rail is suitable for hinge-side frame mounting or on the non-hinge side of the door leaf, offering smooth and adjustable closing for doors up to 1250 mm wide. Certified for use on fire-rated and smoke-control doors, it is particularly applicable in commercial and institutional environments with demanding safety requirements and where reliable door automation is needed. The closer accommodates openings up to 180° for hinge-side installations and provides finely controlled closing between 180° and 0°.

What sets the GR-3500 G version apart is its asymmetrical gear transmission, which greatly reduces opening resistance compared to standard rack-and-pinion models. This feature minimizes user effort and meets accessibility expectations in public and high-traffic spaces, while also reducing wear on door hardware. It is well-suited for bulk procurement in offices, educational facilities, and healthcare buildings where both code compliance and user comfort are priorities.

Key Features

• Adjustable closing force EN 3-5 ? supports doors up to 1250 mm wide for flexible deployment in commercial settings


• Sliding rail system ? ensures discreet appearance and smooth operation without visible fasteners


• 180° hinge-side opening angle ? suitable for large passageways in high-traffic areas


• Asymmetrical gear transmission ? significantly easier door opening for barrier-free access requirements


• Antiwind function with adjustable opening damping ? protects door and hinges from uncontrolled slamming between 70°-180°


• Thermo-valve technology ? stable operation across varying temperatures throughout the year


• Front-facing access to adjustment valves ? simplifies on-site commissioning and ongoing maintenance

Technical Specifications

• Closing Force: EN 3-5 (adjustable)


• Maximum Door Width: 1250 mm


• Maximum Opening Angle: 180° (hinge side)


• Closing Speed Regulation Range: 180°-7°


• Latching Action Adjustment Range: 7°-0°


• Opening Damping (Antiwind) Regulation: 70°-180°


• Certification: Fire-rated and smoke-control door approved


• Gear Type: Asymmetrical gear


• Thermal Valves: Yes


• Color: Black

Applications

Intended for use on single or double fire-rated, smoke-control, and large commercial doors in office buildings, schools, hospitals, public buildings, and industrial facilities. Suitable for barrier-free access projects due to reduced opening force. Also applicable for renovations and retrofits where both accessibility and code compliance are required.

Packaging & Shipping

Standard export packaging. Each unit includes the GR-3500 door closer body in black, sliding rail, mounting hardware, and a user manual with adjustment instructions.