Key duplication is the process of creating a new key that matches an existing key. A locksmith or key-cutting professional uses the original key as a pattern or reference to cut a new key blank into the same shape and configuration.
Key duplication is commonly used when someone needs a spare key for a home, vehicle, cabinet, padlock, or other lock. The process can range from simple mechanical duplication to more specialized cutting methods for modern and high-security keys.
How Does Key Duplication Work?
Traditional key duplication involves placing the original key and a compatible blank into a key-cutting machine. The machine follows the cuts and contours of the original key while a cutting wheel creates corresponding cuts on the blank.
Once cutting is complete, the duplicate key is cleaned and checked to make sure it has the correct profile and can operate the intended lock.
The exact process depends on the type of key. Standard flat keys are generally straightforward to duplicate, while automotive, high-security, dimple, and other specialized keys may require specific equipment.
What Types of Keys Can Be Duplicated?
Many common mechanical keys can be duplicated, although the equipment and method vary by key type.
House Keys
Standard residential keys are among the most commonly duplicated keys. A compatible blank is cut to match the original key.
Commercial Keys
Commercial door keys can also be duplicated, depending on the lock system and key-control restrictions.
Automotive Keys
Many traditional mechanical automotive keys can be duplicated. Modern vehicles may additionally use transponders or electronic components, which can require programming rather than simple mechanical duplication.
Padlock Keys
Keys used with keyed padlocks can often be duplicated when a compatible blank is available.
Cabinet and Cam Lock Keys
Small keys used for cabinets, drawers, mailboxes, and cam locks may also be duplicated using suitable blanks and cutting equipment.
High-Security Keys
High-security keys often use specialized key profiles or cutting patterns. Duplication may require specific machines, authorized blanks, or additional restrictions depending on the lock system.
What Machine Is Used for Key Duplication?
A key duplicating machine, also called a key-cutting machine or key duplicator, is commonly used to duplicate mechanical keys.
Traditional duplicators generally use a guide or tracer to follow the original key while a cutting wheel reproduces its cuts on the blank. Different machines are designed for different key profiles and applications.
Some modern machines use electronic or computerized systems to produce highly precise cuts based on a key code or digital information rather than physically tracing an existing key.
Key Duplication vs. Key Cutting
Although the terms are sometimes used interchangeably, key duplication and key cutting can describe slightly different processes.
Key duplication usually means copying an existing key to create another key with the same configuration.
Key cutting is the broader process of creating the cuts on a key blank. A key can be cut by copying an existing key or by using a key code, code card, or other specifications.
In other words, duplication is one common reason for cutting a key.
What Is the Difference Between Key Duplication and Key Replacement?
Key duplication creates an additional key based on an existing key or its specifications. The original key remains available for use.
Key replacement is a broader term that generally refers to obtaining a new key when the original is lost, damaged, or unavailable. Depending on the lock, a replacement may be created from a key code, lock information, or by other locksmithing methods.
When Is Key Duplication Used?
Key duplication is useful when additional working keys are needed for:
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Homes and apartments
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Offices and commercial buildings
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Vehicles
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Padlocks
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Cabinets and drawers
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Mailboxes
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Lockers
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Equipment and utility locks
It is often a convenient way to provide spare keys to family members, employees, property managers, or other authorized users.
