Components & reference points
Lock and cylinder: the difference
The lock is the mechanism that controls the door closure. The cylinder, also known as the lock cylinder, is the component that receives the key and enables the command of this mechanism.
THE KEY POINT TO REMEMBER
Changing keys does not always require replacing the entire lock.
The role of the lock
The lock case contains the components that move the bolts. It may be recessed into the door or fitted to its surface. Strikes fixed to the frame receive the locking bolts.
A multipoint lock links several anchoring points to a single command. Its condition and adjustment directly affect the ease of closure.
The role of the cylinder
The cylinder mechanically identifies the correct key and transmits its rotation via a cam or an appropriate drive mechanism. Many models can be replaced independently of the lock case.
Not all cylinders rely on the same technology. The profile, lengths, drive mechanism, and functions must match the lock. The number of pins alone does not reflect its security.
Which component needs to be replaced?
After a key loss or move-in, replacing the cylinder may be sufficient to eliminate access with old keys, provided the rest of the mechanism is in good condition.
A jammed handle, a bolt that no longer retracts or a broken operating rod may require a lock case repair instead. A door that is difficult to close may simply need adjustment.
A comprehensive review of the protection
The lock, cylinder, door furniture, and frame work together. A reinforced cylinder that is misaligned or excessively oversized remains poorly protected.
For an A2P lock, replacement must adhere to the certified configuration. Key reproduction conditions also depend on the selected system and the manufacturer's requested documentation.
IN IMAGES
MULTISECU ADVICE
Uncertain about your lock?
A photo of the mechanism, along with some details about your door: we help you identify the right solution.