The cylinder is the part that contains the code for the key and determines whether the door locks and unlocks.
Turn part of a lock door.
The cylinder contains a series of pins that are shifted into place with the key specific to that particular cylinder.
The cylinder or lock body is the part of the door lock where you insert the key.
If a cylinder is sticking has a key broken off in it.
When the key is inserted it allows the lock body to turn.
Box strike plate.
The lock cylinder is the meat of the door lock.
The lock engages a bolt inside the door.
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The lock cylinder or key cylinder is the body of the lock where you insert a key and adjust the lock pins before you engage or disengage the lock.
If you need a new lock because you lost the key to the door you may opt for re keying the cylinder rather than replacing it.
The spindle is the bar that connects knobs or levers through the door and operates the lock mechanism.
Parts of a traditional lock cylinder lock body.
When you unlock your front door you turn the key inside of the lock cylinder.