THERE ARE MANY THINGS WE LOSE SLEEP OVER. THE DIFFERENCE BETWEEN A CYLINDRICAL DOOR LOCK AND A MORTISE DOOR LOCK IS NOT ONE OF THEM.
But, a broken lock or a lost key can cause some red-eyed mornings. Replacing the lock solves both of these problems. And when it comes time to replace hardware, it is critical to know the difference between mortise and cylindrical locks. Here are some important keys to knowing the difference between the locks.
CYLINDRICAL DOOR LOCK – THE “PLAIN JANE” OF ALL DOOR LOCKS
The cylindrical lock has the tumbler and keyhole in handle of the door. It is likely the lock on your office or bathroom door. A cylindrical lock is installed through a door with each knob or lever on opposite sides.
PREPPED HOLES ALLOW FOR EASY INSTALLATION
Doors often come prepped for a cylindrical lock with the standard 2 1/8 inch hole through the door. Some locks feature additional bolt holes for added security.
The second, smaller hole is bored into the side of door. This hole is used for the latch bolt that will lock the door. Installation of a cylindrical lock is quick because the only tool it requires is a drill. Once the holes are drilled, snap the knobs into place and it should be good to go!
A Cylindrical door lock is the least expensive because of its quick assembly. Surprisingly, this lock was only invented in the last century. So, although it is the most basic of locks, it hasn’t been around for long.
MORTISE LOCK – THE CLASSIC YET STURDY ALTERNATIVE
In contrast, a mortise lock has the most “classic lock”. On this lock, the handle and lock are separated. Normally the locks sit directly above the handle. An example of a mortise lock is a dead bolt lock on the front door of your home.
The installation of a mortise door lock requires a mortise cut within the door. Drilling or cutting into the door is therefore more complex than a prepped cylindrical lock. Professionals often use a mortising jig to make this precise cut.
Though the installation of this lock can weaken the structure of a timber door, it adds strength and versatility to the lock. You are able to choose almost any keyway and have the option of including a deadbolt.
A mortise lock enables greater return spring, meaning the knob or handle returns easily to its original position. Due to the return spring, mortise locks are more durable than cylindrical locks.
The next time a key disappears or a door lock jams, make sure you choose your lock based on the holes the door is prepped with. If you are deciding between a Mortise lock and a cylindrical lock, consider the traffic and how often the lock will be used.