Understanding how locks work is the first step in appreciating the importance of proper security. Let’s take a closer look at the internal workings of a lock.
Internal Parts of a Lock
To grasp how lock rekeying works, it’s helpful to understand the basic structure of a lock cylinder. While designs may vary, most standard locks used in homes and businesses share common components.
Components of a Lock
The lock housing is the outer casing that encases and supports the cylinder. The cylinder, often called the plug, fits securely within this housing and is held in place by a clip, cam, or nut to prevent it from being removed.
Both the lock housing and the cylinder feature holes that accommodate “bottom pins,” which interact with the key.
How a Key Works
When a key is inserted, its unique cuts raise the bottom pins (shown in green) to align with the cylinder’s shear line, allowing it to rotate and unlock the door.
Role of Lock Pins
Lock pins play a crucial role in determining which key will operate the lock.
Inside the lock housing are additional pins known as top pins. When a key is not inserted, these top pins rest in the cylinder holes, blocking the shear line and preventing the cylinder from rotating.
Preventing Unauthorized Access
When the correct key is inserted, it raises the bottom pins so they sit flush with the cylinder, enabling rotation. However, if an incorrect key is used, some pins will be positioned below the shear line while others remain above it. This misalignment blocks the shear line, preventing the cylinder from turning and keeping the lock secure.
Internal Mechanism
The bottom pins, top pins, and springs are held in place either internally or by a spring cap, ensuring that everything stays intact. This design prevents tools like screwdrivers from easily opening the lock, maintaining its security.
We often don’t appreciate the complexity of our home or business security mechanisms, but rely on them for much! If you’re considering upgrading your locks or need assistance with any locksmith issues in Atlanta, reach out to our team at Sandy Springs Locksmith.