Rekey
Rekeying alters an existing lock cylinder so it operates with a newly cut key, typically preventing previous keys from functioning without requiring replacement of the door hardware assembly.
6 possible tasks · typical 5-step process
What it is
Lock rekeying involves modifying the internal pin configurations of standard deadbolts, knob locks, lever handles, or commercial mortise cylinders to correspond with an alternate key pattern. This service can encompass physical disassembly, chamber repinning, mechanical lubrication, and operational testing of existing, structurally intact locksets. It typically does not cover repairing fractured or seized internal latch mechanisms, replacing exterior architectural trim, or retrofitting non-standard door cutouts.
What Rekey can include
Pin Tumbler Replacement
Extracting existing bottom key pins and driver pins, then repinning the plug chambers to exact physical depths matching a new key bitting profile.
Master Key System Configuration
Installing split master pins within multi-level lock cylinders, allowing dedicated individual keys for specific entries alongside a universal master key.
Lock Cylinder Inspection and Servicing
Examining the cylinder plug, springs, and housing for mechanical binding, clearing internal brass debris, and applying dry graphite or PTFE lubricant.
Key Bitting and Duplication
Originating new factory-standard operating keys using precise code cutters or duplicating working keys within strict millimeter mechanical tolerances.
Single-Key System Unification
Aligning the internal pin chambers of multiple compatible door locks across an entire facility to turn smoothly on a single, shared key blank.
Multi-Type Cylinder Servicing
Repinning diverse lock configurations, including rim cylinders, mortise cylinders, key-in-knob cylinders, and standard tubular residential-style deadbolts.
How the work is typically performed
- 1
Lock Disassembly and Plug Removal
Technicians typically detach the lock assembly from the door, remove the rear retaining ring or cam, and slide a dedicated plug follower through the housing to extract the internal cylinder plug.
- 2
Chamber Depinning and Spring Inspection
Existing lower pins are removed from the plug chambers, upper driver pins and springs can be examined for wear, and accumulated debris or spent lubricants are cleaned out.
- 3
Pin Loading and Shear Line Verification
Using the designated key as a reference gauge, replacement bottom pins are placed into the plug chambers until each pin rests level with the shear line surface.
- 4
Cylinder Assembly and Rotation Testing
The plug is reinserted into the cylinder housing against spring tension, the retaining clip is secured, and cylinder rotation is checked to verify functional operation with the new key and rejection of the prior key.
- 5
Door Reinstallation and Strike Alignment
The assembled lock is mounted back onto the door and secured, allowing verification that the bolt or latch aligns with the door frame strike plate during regular operation.
Common reasons customers look for this service
- Transfer of occupancy or ownership of a residential or commercial property
- Instances where keys may remain in the possession of former occupants, vendors, or personnel
- Efforts to consolidate multiple disparate door keys into a unified key profile
- Situations involving misplaced or unaccounted-for duplicate keys
- Updating operational keys while retaining existing exterior lock hardware
About Rekey
What is the difference between rekeying a lock and replacing it entirely?
Rekeying retains the existing exterior door handles, latch bolts, and trim while altering only the internal brass pins inside the cylinder to match a new key cut. Complete replacement involves removing the entire hardware assembly and installing a new lockset onto the door.
Can every lock on a property be rekeyed to use the same single key?
Locks can generally share a single key only if their cylinders share compatible keyway profiles, such as matching manufacturer designs. Locks featuring incompatible keyway configurations cannot accept the same physical key blank, which can necessitate separate keys or cylinder replacements to achieve single-key operation.
Does rekeying fix a lock cylinder that sticks or resists turning?
Rekeying may resolve operational resistance if the cause is worn internal pins, an irregular key cut, or chamber debris. If the binding stems from a distorted latch mechanism, internal mechanical failure, or frame misalignment, rekeying the cylinder typically does not correct the underlying issue.
This page provides general information about Rekey for reference only. It is not professional, safety, medical, legal or financial advice, and it does not describe the services of any particular provider. Scope, methods and timing vary by provider and situation. Kuldesac does not perform these services; contact a qualified provider directly to discuss your specific needs.