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locked. This can be problematic in applications where locks are required to be fail open, in the event of an emergency. Pre-load can have a serious impact of the longevity of a lock. If the locking mechanism becomes damaged as a result of pre-load, the number of cycles it is able to perform can be dramatically reduced, leading to a replacement lock being required to ensure correct operation. When locks are subject to continuous pre-load, the likelihood


of breakage increases and if pre-load is not resolved, the same situation will occur repeatedly. This results in down time and ultimately lost revenue both through the unit being out of action but additionally through the added cost of replacement locks. Even if excessive force doesn’t immediately damage the lock, it can accelerate wear and tear on its components, reducing its lifespan and making the lock more prone to future failures.


HOW TO PREVENT PRE-LOAD To prevent pre-load from causing damage to an electric lock, it is important to be aware of all the impacting factors to ensure their proper operation and longevity. Pressure and preload issues can cause malfunctions and, in some cases, damage to the lock mechanism or electronics. Preload can be reduced by:


Proper Installation: Ensuring the lock is installed correctly. Poor installation can lead to preload issues. If a lock is retrofitted, it is important to have a properly designed mounting plate to ensure that the lock sits perfectly.


Regular Maintenance: Regularly inspecting the lock and surrounding components to check for signs of wear, misalignment, or damage, and ensuring any issues are addressed promptly, can prevent them from worsening. Routine maintenance on the lock, including cleaning and lubrication, can prevent the accumulation of dirt and debris that could create pressure on the locking mechanism.


Proper Sizing and Alignment: Ensuring that the lock, strike plate, and any related hardware are properly sized and aligned will reduce unnecessary pressure on the locking mechanism.


Avoid Over-Tightening: When installing the lock or related hardware, avoid over-tightening screws and bolts which can cause pressure on the lock.


Misalignment: Pre-load pressure can cause misalignment between the lock and the strike, preventing it from engaging or disengaging correctly. In some cases, this may lead to situations where the lock cannot be controlled electronically. These have wider implications within the application, for example,


If the strike can’t engage, an operator may not be able to close a vending machine door after refilling, or a customer may not be able to receive their parcels from a locker if pre-load stops the lock from opening. This improper lock operation will affect visibility into the lock door and latch monitoring functionality. Depending on the application, a lock can be set to remain closed (fail locked) or, remain open (fail open) in the event of a power outage. If pre-load is an issue the lock may not be able to perform this operation, therefore, a vending machine which is set to be fail locked in the event of a malfunction, may be left with the door open and vulnerable to theft. This can also be applied to applications where a door is required to be fail open, thereby leaving doors


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Anti-Tampering Measures: Implementing security measures to deter tampering or attempts to force the lock may deter actions which can create pressure on the lock. This may include the use of, access control systems, and proper door reinforcement.


Use Quality Components: Choosing high-quality electronic locks with durable and reliable components. Cheap or poorly manufactured locks are more likely to develop pressure and preload issues.


Overall, pre-load is a vital consideration when it comes to electric


locks, as it can impact functionality and therefore effectiveness and longevity. Not every lock is built to withstand pre-load and it’s an important consideration. By taking steps to prevent and address pre-load, it is possible to ensure that an electronic lock will function properly and providing a reliable, durable solution for many years.


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