Cylinder (lock body) The cylinder, or lock body, is the part of the door lock where the key is inserted. When locked, the cylinder is attached to a series of spring-actuated pins that prevent the cylinder from rotating. That said, many door knobs have a secondary locking mechanism integrated into the latch assembly called a locking latch or plunger. From the backrest to the hole, from the impact plate to the spindle, we'd like to help you understand some of the most common terms and help you discover the sometimes mysterious and sometimes confusing world of door hardware.
It's actually easier than it seems. Once you get the hang of it, your knowledge of the parts of a door lock will help you tackle your home's hardware upgrades with ease. We'll also provide you with a practical understanding of the different types of door locks and the security options available to you. The shaft is the bar that connects the knobs or levers through the door to operate the locking mechanism.
Like a front plate, the locking plate is a metal plate that is attached to the door frame and has a hole (or holes) to house the lock bolt. The closing plate protects the door frame and adds security to the opening. The cylinder is the part of the lock that you interact with the most. This is the part that has the keyhole and the glass that contains the pins and leaves we talked about earlier.
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