This allows the door to be unlocked from the inside with the turn of the knob or lever while the exterior knob or lever would require a key. When the top lock button is pressed, the outside knob won’t turn, but the inside knob will. Lock buttons are installed on the side of the door in the faceplate and can be used to control how the door functions. When the knob or handle is turned, the spring retracts allowing the latch to be pushed into the door. The interior door knob or handle controls the latch bolt from the inside. The other spring pushes the lever down to keep the deadbolt locked into place. One spring pushes the latch bolt out, so it can remain locked in the strike plate. There are usually two springs built into mortise locks. The spindle operates the latch bolt when the knob or handle is turned. The spindle is the square bar that connects to the handle or knob and passes through the spindle hole on the mortise lock. Rotating the knob toward the closest edge of the door engages the deadbolt, while rotating it in the opposite direction disengages it. There are over 49 functions available on Schlage mortise locks, compared to over 29 functions for Schlage cylindrical locks. Mortise lock bodies can accommodate standard locking functions as well as deadbolts, thumbturns, indicators, and other options. There are parallel vertical sections on the left and right that fit into rectangular holes cut into the jamb. Upon looking at the door from the front, you will notice the body’s square section attached to the door facing. The lock body, which is shaped like a letter T, is slid into the door and protects the lock components. The lock body is the metal case that houses the lock mechanisms for a mortise lock. They also have more trim and lever styles, resulting in greater design flexibility. Compared to cylindrical locks, mortise locks have a distinctive look and are equipped with more working mechanisms. A mortise is a hole or recess in which the lock is inserted. In this blog, we list the parts of a mortise lock and cylindrical locks and explain each one’s contribution to the entire assembly.Ī mortise lock is installed into a rectangular pocket cut into a door edge. There are two main types of locks manufactured today: mortise locks and cylindrical locks.

No matter how simple it appears on the outside, a door knob consists of several parts that all work together to form a secure point between the inside of your home and the outside world.Īt Access Residential Hardware, we sell door knobs that range in complexity from traditional knobs and levers to modern keyless solutions. If you want to replace your old door knob or repair the existing one, it helps to know the various components that make up its assembly.

Parts of a deadbolt lock diagram