The High Security Mortise Lock delivers reliable protection and consistent mechanical performance for demanding door applications. Manufactured with solid SUS304 stainless steel for the roller bolt, deadbolt, forend, and strike plate, it provides strong resistance to wear, corrosion, and long-term usage. Certified to BS EN12209 and DIN 18251 Grade 3 standards, the lock has passed 200000 operation cycles, ensuring durability in high-traffic environments. Fire resistance reaches 260 minutes under EN1634, while corrosion resistance achieves 240 hours according to EN1670, supporting use in both safety-critical and exposed conditions. Suitable for wooden doors, metal doors, fire-rated doors, interior and exterior doors, as well as swing doors, this mortise lock offers a dependable solution for commercial and residential security needs.

1. 200,000-Cycle Verification

The DDML010 High Security Mortise Lock complies with BS EN 12209 and DIN 18251 Grade 3 and has completed 200,000 mechanical operating cycles. Its roller bolt and deadbolt are tested through repeated retraction and locking movements, making the lock suitable for frequently accessed building entrances. The verified grade supports sample evaluation, technical approval, and project inspection.

2. 260-Minute Fire Test

Tested for 260 minutes in accordance with EN 1634, the lock can be specified for compatible timber or metal fire door assemblies. Its SUS304 roller bolt, deadbolt, forend, and strike plate maintain functional engagement under fire-test conditions. The High Security Mortise Lock can be included in fire door hardware schedules for hotels, offices, and public facilities.

3. 240-Hour Corrosion Test

DDML010 has completed 240 hours of corrosion-resistance testing to EN 1670, supporting use in door areas exposed to humidity, temperature changes, or frequent cleaning. The roller bolt, deadbolt, forend, and strike plate are manufactured from SUS304 stainless steel. This material selection helps limit corrosion that could affect lock movement, appearance, and long-term maintenance planning.

4. Two Center Distances

The High Security Mortise Lock offers 50mm, 55mm, and 60mm backsets, together with 72mm or 85mm center distances. These combinations accommodate different cylinder positions, lever arrangements, and door preparation standards. Square or radius forends and strike plates are available, helping door manufacturers reduce slot modification during standardized production and volume installation.

5. Roller Bolt Operation

The SUS304 roller bolt travels smoothly along the strike plate as the door closes, making it suitable for swing doors that require frequent access or controlled closing resistance. It is paired with a solid SUS304 deadbolt for positive locking. SSS, PSS, PVD, PB, AB, and AC finishes allow coordination across a complete architectural door hardware schedule.

1. Hotel Public Areas

Hotel lobbies, conference zones, banquet rooms, and floor corridors experience repeated door operation throughout the day. The roller bolt supports a smoother closing movement in these high-traffic areas. The High Security Mortise Lock has completed 200,000 operating cycles and 240 hours of corrosion testing, while six finish choices coordinate with levers, hinges, and door closers.

2. Office Fire Doors

Stairwells, service areas, and escape routes in office buildings often use timber or metal fire doors. DDML010 has completed a 260-minute fire test to EN 1634 and complies with BS EN 12209 and DIN 18251 Grade 3. Three backsets and two center distances help consultants, door manufacturers, and contractors match different door specifications.

3. Coastal Commercial Buildings

Door hardware in coastal shopping centers, resorts, and waterfront offices may face prolonged exposure to humid air. The High Security Mortise Lock has passed a 240-hour corrosion-resistance test under EN 1670, with key exposed parts made from SUS304 stainless steel. Square and radius forend options support different door preparations while maintaining a coordinated architectural finish.

4. Hospitals and Schools

Hospital departments, classrooms, and public corridors require locks that can handle concentrated traffic and repeated operation. DDML010 fits wooden, metal, interior, exterior, fire-rated, and swing doors. Buyers can select a 72mm or 85mm center distance according to the door design. Its roller bolt can work with a door closer to support controlled closing and standardized maintenance.