Leading Mortise Lock Manufacturers

A mortise lock is a lock requiring a pocket—the mortise—to be cut into a piece of furniture or the edge of a door into which the lock is to be fitted. Mortise locks are typically found on older, pre-bored cylindrical lock structures worldwide; however, they are increasingly used in high-end commercial and residential construction. In addition, the style is prevalent in domestic buildings of most eras. 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.

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.

Sierra Pacific Engineering & Products (SPEP) $$$

At Capitol, we are committed to providing maximum value to our customers. Our “Lean Thinking” approach offers advantages in the areas of quality, service cost and shorter lead-times. Our facilities are totally integrated, from customer contact and quotation, through to design, tool manufacturing, secondary machining, finishing and assembly, all under one roof.

Capitol Industries Inc. $$$

We are your leading supplier and manufacturer of security locks. We are ISO 9000 certified and guarantee you will receive the highest quality security locks on the market. Our product listings include key switches, padlocks, weather-resistant locks, handles, handle locks, accessories, and more. Our security locks serve a variety of industries. Contact us today for your highest-quality security...


VSI is North America`s largest producer of vehicle locks for the heavy truck market. Earning their position as a leader in lock & key solutions, VSI designs, produces & sells mechanical locks to major domestic truck suppliers & their international affiliates for production & aftermarket. VSI’s locks meet exact specifications and follow AIAG guidelines for quality & customer satisfaction.

VSI, LLC $$$
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placeholder image Sierra Pacific Engineering & Products (SPEP) Capitol Industries Inc. MEI LOCK & SECURITY VSI, LLC

Mortise locks are constructed from various mechanical components that have oddly weird shapes and are housed in a box made of thick gauge steel with circular and square holes that almost appear to be part of a secret code. The "body" of mortise locks is enigmatically concealed inside a recess carved into the edge of the door. As a result, mortise lock installation is often NOT a DIY project.

Although mortise locks are supposedly stronger than bored cylindrical locks, door construction may be compromised by a mortise lock cut. However, their adaptability provides more leverage than cylindrical locks, lasts longer, and allows for more architectural compliance with existing security systems. In addition, older houses may have mortise locks normally opened with a skeleton key.

Mortise Lock


A mortise lockset is made for doors with mortise locks, which entail installing a box lock into a deep slot, or "mortise," in the door's edge. Mortise lock sets come with a backplate, door knob, box lock, and all the necessary hardware and come in various traditional designs.

A non-locking spring latch operated by a door handle is an option for mortise locks. Sash locks are used for locks like these. A deadlock is a basic design without a handle or latch. Deadlocks, often a pin tumbler rim lock, are frequently used as a secure fallback to spring non-deadlocking latches.

Lever locks have historically been used as a mechanism in mortise locks and are still used often today. Aged mortise locks could have used warded lock mechanisms. Although, European parlance refers to lever keys, which has confused the general public.

The lock body, which is installed inside the mortise cut in the door, the lock trim, which can be chosen from a variety of designs of levers, doorknobs, handle sets, and pulls, the strike plate (or box keep), which reinforces and lines the cavity in the door jamb or frame where the bolt fits, and the keyed cylinder, which controls the lock body's locking and unlocking function, are the components that make up a typical mortise lock installation.

Design of Mortise Locks

The four fundamental components of a mortise lock are the lock body, lock trim, strike plate, and keyed cylinder. The component that is fitted into the door frame is the lock's body. The knob or handle used to open the door is the lock trim. The piece that lines the lock hole in the frame is known as a strike plate. Additionally, the lock body's locking and unlocking mechanisms are controlled by the keyed cylinder. Typically, these parts are made of metals like brass, nickel, copper, or steel types.

They come in various finishes to match the structure’s design and are frequently engraved with fine detail, polished, or plated for aesthetic purposes. For a few reasons, a mortise lock is more durable and reliable than a cylinder lock. First, only a lever or key inside can make the deadbolt slide back within the door component because the lock mechanism is concealed on both sides. The bolt is also significantly thicker and longer. Only a skilled locksmith should operate on mortise locks since they are challenging to install and fix. Also, worn pins and springs should be replaced by a professional.

Magnetic Mortise Lock

Application of Mortise Locks

Hotels, offices, and affluent houses frequently have mortise locks installed. Even though they are expensive, their prestige increases a building's worth because they offer greater protection than other kinds of door locks. The most frequent door-locking and door-unlocking operations in schools and hospitals include entrances, classroom security, office passages, and storerooms. Unfortunately, although the placement of the latches and the bolt (if present) can provide some hints, it is typically impossible to tell how a mortise lock works simply by looking at the trim.

Mortise lock installation is challenging and requires some carpentry expertise and meticulous measuring. First, a door section must be removed to accommodate the substantially rectangular body of the locking system. This component houses the locking mechanism, which includes the doorknob, handle, lever, and thick, sturdy deadbolt. Next, a metal plate is lined up with the lock body and fitted into the door frame. The bolt, often composed of steel, slides into the opening in the door frame when the key or lever is twisted.

Mechanical Mortise Lock

Reasons to Purchase Mortise Locks

Mortise lock purchasers have very clear motivations, which are not at all obscure. They choose them for the following reasons:

  • Mortise locks offer trustworthy security.
  • Their structure already has mortise locks.
  • Their architects specify mortise locks.
  • Mortise locks withstand repeated use and abuse.
Mechanical Mortise Lock

Choosing the Right Mortise Lock Manufacturer

To make sure you have the most beneficial outcome when purchasing mortise locks from mortise lock manufacturers, it is important to compare at least five manufacturers using our mortise lock directory. Each mortise lock manufacturer has a business profile page that highlights their areas of experience and capabilities and a contact form to directly communicate with the manufacturer for more information or request a quote. Review each mortise lock company website using our patented website previewer to get an idea of what each business specializes in, and then use our simple RFQ form to contact multiple mortise lock manufacturers with the same form.

Mortise Locks Informational Video


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