Mortise Locks

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Mortise locks are common in older commercial and residential buildings, as well as newer buildings with higher property value, since these locks are more expensive and secure than cylinder locks. Read More…

Mortise Locks Mortise locks are a common and secure method of locking doors and furniture. They are older, and were used before cylinder locks, which gained favor in the 1940s.

Leading Manufacturers

Long Beach, CA  |  800-433-5554

As an ISO certified source for industrial hardware, Sierra Pacific Engineering & Products is a company you can trust in for excellent locks. Quality, service & value are the core to being a top OEM supplier and SPEP offers a wide range of additional products including quarter turn, compression & recessed latches, as well as a complete line of industrial hinges. Please call SPEP today!

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Sierra Pacific Engineering & Products (SPEP) $$$

Clifton, NJ  |  800-524-2575

We will work with you to custom design locks that will fit your needs exactly. We are committed to supplying a wide variety of locks including vending machine locks, cam locks, door locks and a broad selection of others. The average tenure of our engineers is over ten years and we want to put that experience to work for you! To learn more about our company and how to get started, email or call us today!

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Northeast Lock Corp. $$$

Elizabeth, NJ  |  800-834-9017

Maffey’s is a fully licensed locksmith providing functional and user friendly security products such as door and security locks as well as keys. Courteous, reliable and professional, we strive to provide lasting improvements for both home and workplace security. Maffey’s Security Group uses comprehensive planning and the implementation of physical security systems needed to secure your future.

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Maffey's Security Group $$$

Gainesville, GA  |  866-988-5625

At Ranger Lock, we’ve been committed to creating more secure locks and lock guards since we opened the doors to our company all the way back in 2002. One of our most popular products, the ATF-Compliant Lock Box, is consistently a best-seller from the Ranger Lock online store due to its rugged construction and durability. When you need a fully ATF-compliant lock guard, you need the Ranger Lock ATF-Compliant Lock Box.

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Ranger Lock $$$
placeholder image Sierra Pacific Engineering & Products (SPEP) Northeast Lock Corp. Maffey's Security Group Ranger Lock

Mortise locks are often seen in hotels, office buildings and homes of the upper class. Although they are costly, their prestige adds value to a building because they provide superior security over other types of door locks.

Installing mortise locks is difficult, and takes a degree of woodworking skill and much precise measuring. A portion of the door must be carved out to fit the large rectangular body of the locking system. This component houses the locking component, including the handle/lever/doorknob and deadbolt, a thick, solid piece of metal. A metal plate is also installed into the door frame and aligned with the lock body. The turn of a key or lever prompts the bolt, usually made of steel, to slide into the opening in the door frame when it is turned.

Mortise Lock Mortise - Sierra Pacific Engineering and Products

All mortise locks are composed of four basic parts: the lock body, the lock trim, a strike plate and the keyed cylinder. The lock body is the part that is installed into the door frame. The lock trim is the knob/handle that is used to open the door. A strike plate is that which lines the hole in the frame where the deadbolt fits. And the keyed cylinder operates the locking and unlocking function of the lock body.

These components are usually made of metals such as brass, nickel, copper or steel grades. For aesthetics, they are often engraved with detail, polished or plated and come in many different finishes to match the décor of the building.

A mortise lock is stronger and more secure than a cylinder lock for a couple of reasons. First, the lock mechanism is covered on both sides, and only a lever or key on the inside can cause the deadbolt to slide back inside the door component. In addition, the bolt is much longer and thicker.

Because mortise locks are so difficult to install and repair, only an experienced locksmith should work on them. If the latch has weak tension, the pins and springs are probably worn out and should be replaced by a professional.

Mortise Locks Informational Video