Dortronics Provides A New Way To Electronically Secure Storefront Doors

With a concealed locking mechanism and concealed fasteners on the exterior of the door, the Dortronics ML-1100 Series Mortise Lock & Pull stands up to high use, abuse and vandalism.

The electromagnet was slid into position, making sure the centerline mounting hole was in position. Some filing was required to properly locate the electromagnet.

When the alignment was correct, we used a self-centering drill bit to locate and drill two pilot holes for each mounting block. We enlarged the holes to accommodate the security Torx head mounting screws in the mounting blocks placed within the jamb. Any burrs created from drilling the holes were removed to ensure the blocks mounted flush. The mounting blocks were installed into the jamb using the provided screws.

Next, four handle mounting holes were drilled. To provide maximum holding force, the two outside holes away from the magnet and the two center holes were drilled. A custom made drill fixture was used to ensure the holes were drilled straight. The four 5/16” diameter holes were drilled through both the front and rear of the stile. On the interior side, a countersink was used to recess the screw heads.

The electromagnet was installed into the jamb. The four stainless steel mounting screws were started before any screw was tightened. Depending upon the application, thread locker may be recommended to thwart the screws from being removed.

The next step was to mount the handle assembly. Four long stainless steel Torx head screws were provided. Thread locker was used to ensure the handle mounting screws do not loosen.

Four washers were used to set the depth of the armature, positioned on the mounting screw between the armature and the handle to raise the armature. Washers were removed to lower the armature.

The handle should be flush with the front of the jamb when the electromagnet is powered. This will minimize the possibility of separating the armature from the electromagnet and gaining access.

When the armature is in position, powering the magnet will draw the armature flush, securing the door in the closed position. Since electromagnets are fail safe devices, power is required to keep the door locked.

In addition to finish options for the ML-1100, the Magnetic Bond Sensor (MBS) option provides a signal when the lock is properly energized and the magnetic field is holding the armature flush.

The Dortronics ML-1100 Series Mortise Lock & Pull provides your customers with another choice for electronically securing storefront aluminum glass doors.

For more information, contact your local locksmith distributor or Dortronics. Telephone: 800-906-0137. Web Site:

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