A master key system works by using specialized lock cylinders that contain extra sets of pins, called "master pins," which allow both the master key and individual keys to open the lock.
Here's a breakdown of the process:
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Standard Lock Cylinders: In a regular lock, a single set of pins aligns when the correct key is inserted, allowing the cylinder to turn.
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Master Pins Added: In a master key system, additional "master pins" are inserted into the lock cylinder. This creates multiple shear points.
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Shear Points Explained: The shear point is the point where the cylinder can turn. In a standard lock, there's only one shear point when the correct key aligns the pins. In a master key system, master pins create an additional shear point.
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Individual Key Operation: Each individual key will align one of the shear points, allowing it to open its specific lock.
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Master Key Operation: The master key is cut to align a different shear point created by the master pins. Because it aligns a different set of pin positions, the master key can open all locks within the system.
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Duplication Considerations: The master key can be duplicated like any other key, assuming proper authorization and the availability of a matching key blank.
In summary, a master key system utilizes master pins within the lock cylinders to create multiple shear points. Each individual key will align one of these shear points to open its specific lock, while the master key aligns another, allowing it to open all locks in the system.
