Cylinder lock

Europrofile Cylinder set with 2 double cylinders and one single cylinder (left) and also the screw to secure the cylinder

A cylinder lock is a lock constructed with a cylinder that a locksmith can easily unscrew to facilitate rekeying.[1] The cylinder may contain any of a variety of locking mechanisms, including the pin tumbler lock, the wafer tumbler lock and the disc tumbler lock.

The first main advantage to a cylinder lock, also known as a profile cylinder lock, is that the cylinder may be changed without altering the boltwork hardware. Removing the cylinder typically requires only loosening a set screw, then unscrewing the cylinder from the boltwork. The second is that it is usually possible to obtain, from various lock manufacturers, cylinders in different formats that can all be used with the same type of key. This allows the user to have keyed-alike, and master-keyed systems that incorporate a wide variety of different types of lock, such as nightlatches, deadbolts and roller door locks. Typically, padlocks can also be included, although these rarely have removable cylinders.

Standardised types of cylinder include key-in-knobset cylinders, rim (also known as nightlatch) cylinders, Ingersoll format cylinders, American, and Scandinavian round mortise cylinders, and Scandinavian oval cylinders. There are also standardised cross-sectional profiles for lock cylinders that may vary in length - for example to suit different door thicknesses. These profiles include the europrofile (or DIN standard), the British oval profile and the Swiss profile.

Cruciform pin-tumbler locks may also use interchangeable cylinders, as do a few sophisticated lever locks.

Individually keyed system (KD)
With an individually keyed system, each cylinder can be opened by its unique key.

Keyed alike (KA)
This system allows for a number of cylinders to be operated by the same key. It is ideally suited to residential and commercial applications such as front and back doors.

Master keyed (MK)
A master-keyed system involves each lock having its own individual key which will not operate any other lock in the system, but where all locks can be operated by a single master-key. This is usually applied in commercial environments.

Grand master keyed (GMK)
This is an extension of the master-keyed system where each lock has its own individual key and the locks are divided into 2 or more groups. Each lock group is operated by a master-key and the entire system is operated by one grand master-key. This is ideally utilized in complex commercial systems.

Common entrance suite / Maison keying (CES)
This system is widely used in apartments, office blocks and hotels. Each apartment (for example) has its own individual key which will not open the doors to any other apartments, but will open common entrance doors and communal service areas. It is often combined with a Master Keyed system in which said key is kept by the landlord.

References

  1. ^ Practical Course in Modern Locksmithing. Nelson-Hall Publishing Company. 1943. ISBN 0911012060. 

External links


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • cylinder lock — noun a lock in which a cylinder rotates to move a bolt; tumblers are pins; inserting the key lifts and aligns the pins to free the cylinder to rotate • Hypernyms: ↑lock • Part Meronyms: ↑pin, ↑pin tumbler …   Useful english dictionary

  • cylinder lock —   n.    any lock that is operated by a cylinder key …   Locksmith dictionary

  • cylinder lock — /ˈsɪləndə lɒk/ (say siluhnduh lok) noun a lock for an entrance door, opened by key from the outside and by a knob from the inside …   Australian English dictionary

  • cylinder lock — Linus Yale …   Inventors, Inventions

  • Cylinder — most commonly refers to: Cylinder (geometry), a three dimensional geometric shape Cylinder may also refer to: Contents 1 Science and technology 1.1 Information storage …   Wikipedia

  • lock — lock1 lockless, adj. /lok/, n. 1. a device for securing a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a key, dial, etc. 2. a contrivance… …   Universalium

  • Lock (device) — A lock is a mechanical fastening device which may be used on a door, vehicle, or container, restricting access to the area or property enclosed. Commonly, it can be released by using a key or combination.History of locksSecuring one s property… …   Wikipedia

  • lock cylinder — A cylinder in the middle of a cylinder lock that is prevented from turning (locked) by a number of pins (typically five) which penetrate down through the wall of the cylinder. The cylinder is turned by inserting a key which pushes the spilt pins… …   Dictionary of automotive terms

  • cylinder — [1] The round chamber or hole in the cylinder block that houses the pistons and where combustion takes place. Also called bore or barrel. [2] Any tube like device. [3] A device which converts fluid power into linear mechanical force and motion.… …   Dictionary of automotive terms

  • Lock bumping — is a lock picking technique for opening a pin tumbler lock using a specially crafted bump key . One bump key will work for all locks of the same type.HistoryIn the 1970s, locksmiths in Denmark shared a technique for knocking on a lock cylinder… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.