A maglock (electromagnetic lock or magnetic lock) is a locking device that consists of an electromagnet coil and an armature plate.
There are generally two main types of Mag locks the "direct pull" and the "shear".
Direct pull: Magnet resists the forces pulling the armature directly opposite of the magnetic attraction.
Direct pull: 400 series
Mag lock has an internal coil, which when energized creates a a magnetic field.
Mag locks are typically mounted to the frame header on the secure side of an out swing door.
The armature plate is a ferrous metal plate that is mounted on the door in alignment with the mag head.
When the Mag coil is energized it will bond to the armature. The magnetic field is relatively strong but the boding strength is actually achieved by the surface area of the magnet and the armature.
:
Shear Lock: GF3000 Series
Mag head draws the armature together to create a mechanical interlock.
This mechanical interlock provides the holding force and resists motion that is perpendicular (Shear action) to the angle of attraction between the mag and armature.
Information on Allegion Maglocks can be found here.
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