Electromagnetic locks (maglocks) are among the most popular and reliable access control solutions available. While their basic operating principle is straightforward, improper installation can lead to severe security vulnerabilities, reduced holding force, and costly callbacks.
Understanding the most frequent maglock installation mistakes allows installers to ensure long-term performance and maintain physical security.
Choosing the wrong holding force for the location
A common error is installing a maglock with inappropriate holding force for the door’s specific security level and environment.
- Internal Doors: Standard internal office doors generally require 600 lb (300 kg) of holding force to remain securely closed. High-security areas (e.g., server rooms, archive spaces) require 1200 lb (500 kg) or specialized architectural magnetic handles.
- External Perimeter Doors: A 600 lb (300 kg) “mini-mag” alone is insufficient for primary outdoor security. External doors exposed to high intrusion risks should use higher-capacity magnets, often backed by mechanical key locks for after-hours security.
Using standard maglocks as shearlocks
Maglocks produce magnetic fields that hold the armature plate perpendicular to the magnet face. Applying shear force (sliding force across the face) significantly degrades holding strength.
- The Risk: Installing a standard surface maglock facing straight down or up creates a scenario where an intruder can force the door open by sliding the armature plate off the magnet.
- The Solution: If the locking mechanism must mount horizontally overhead or in the floor, specify a shearlock. Shearlocks combine magnetic force with physical metal pins to withstand lateral shear forces.
Neglecting routine surface maintenance
Maglocks are not “fit-and-forget” devices. Dust and environmental debris naturally accumulate on the mating surfaces.
- Metallic Contamination: In commercial and industrial environments, airborne metallic dust particles stick to the magnet’s surface.
- The Impact: Accumulated debris prevents full, flat contact between the magnet face and the armature plate, drastically lowering effective holding force.
- Best Practice: Regularly wipe down the mating surfaces with a clean, soft cloth and mild detergent to preserve holding capacity.
Essential Pro-Tips for reliable maglock installation
To avoid preventable failures and ensure safety during and after fitting, follow these critical installation practices:
Use security ropes during installation
Safety ropes (steel tethers) hold the heavy magnet in place while mounting. This prevents the unit from slipping or falling, protecting both the installer and the hardware from accidental damage.
Apply threadlock to all fixings
Constant door movement creates micro-vibrations that loosen mounting bolts over time. Applying a thread-locking compound (such as Threadlock) locks screws securely in place. (Note: Avoid permanent compounds like Studlock unless you intend to make the installation permanent and non-removable).
Quick reference: Maglock troubleshooting & error prevention
| Installation Mistake | Operational Impact | Recommended Solution |
|---|---|---|
| Undersized Magnet | Inadequate holding force for high-security areas | Upgrade to 500 kg+ or architectural handles |
| Shear Force Mounting | Susceptible to physical bypass by sliding the plate | Install dedicated shearlocks with mechanical pins |
| Dirty Mating Surfaces | Reduced magnetic bond strength | Periodically clean magnet and armature face |
| Loose Mounting Bolts | Alignment failure caused by door vibrations | Apply thread-locking compound to fixings |
Summary: delivering reliable access control
Avoiding these common errors ensures that electromagnetic locking systems perform reliably, maintain specified holding force, and pass long-term safety inspections. Selecting the correct magnet strength, honoring installation angles, and securing fixings safeguards both the building perimeter and the installer’s reputation.