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Keys may also be made in this fashion without an original as long as the depth of each notch and the type of key blank are known. This is particularly useful for institutions with a great number of locks for which they do not want to maintain a wide variety of archived copies. Code books or on-line resources may be used to program the key clipper/punch settings from the code stamped on the lock, listed in the owner's manual, or available from the vehicle's
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ID before a locksmith will cut additional keys using restricted blanks. Some companies, such as Medeco High
Security Locks, have keyways that are restricted to having keys cut in the factory only. This is done to ensure the highest amount of security. These days, many restricted keys have special in-laid features, such as magnets, different types of metal, or even small computer chips to prevent duplication.
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respectively. The lateral-feed clutch on the top of the machine is then thrown, and the vertical feed rod released into action and power applied through the combination hand-crank power wheel on the right of the machine, until the cutter has passed over the entire length at the blank. A duplicate of the pattern key is obtained in about one minute.
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adjusted to match the corresponding measured depth and a lever is depressed, which cuts the entire notch at once. As the lever is raised the key automatically advances to the next indexed position and the slider is adjusted appropriately to the next measured depth. This cycle is continued until the key is complete.
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A restricted keyblank has a keyway for which a manufacturer has set up a restricted level of sales and distribution. Restricted keys are often protected by patent, which prohibits other manufacturers from making unauthorized productions of the key blank. In many cases, customers must provide proof of
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A "do not duplicate" key (or DND key, for short) is one that has been stamped "do not duplicate", "duplication prohibited" or similar by a locksmith or manufacturer as a passive deterrent to discourage a retail key cutting service from duplicating a key without authorization or without contacting the
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In recent years, dual key cutting machines have come on to the market, enabling cutting of both mortice and cylinder keys on one machine. These machines are primarily manufactured in the Far East and save a key cutter a significant amount of money compared with using two separate dedicated machines.
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Duplicating keys by this process is more labor intense and requires somewhat better trained personnel. However, keys made in this fashion have clean margins and the depth of the notches are not subject to wear induced changes encountered when heavily worn keys are duplicated using a pattern grinder.
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Some common examples of restricted key systems include master key systems, where a single key can open multiple locks within a building, and key control systems which allow for precise tracking of key usage and access control. Overall, restricted keys are an important tool for maintaining security
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In the UK, the majority of the mobile locksmiths will have a dual key cutting machine on their van. The key duplication machine will be able to cut both cylinder and mortise keys, as these are the most popular types of keys in circulation. However, very few will carry a laser key cutting machine,
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Another way to restrict keys is trademarking the profile of the key. For example, the profile of the key can read the name of the manufacturer. The advantage of a trademark is that the legal protection for a trademark can be longer than the legal protection for a patent. However, usually not all
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Rather than using a pattern grinder to remove metal, keys may also be duplicated with a punch machine (the Curtis key clipper is a recognised example). The key to be duplicated is measured for the depth of each notch with a gauge and then placed into a device with a numeric slider. The slider is
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The key to be duplicated is placed in one vise and the blank key to be cut in a corresponding vise under the cutting disk. The vise carriage is then into such position by means of a lateral-feed clutch that the shoulders of both the pattern and blank keys just touch the guide disk and cutter
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system for the owner of the key, such as a maintenance person or security guard, to identify keys that should not be freely distributed or used without authorization. Though it is intended to prevent unauthorized key duplication, copying DND keys remains a common security problem.
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A restricted key is a type of key that is designed to limit access to a specific area or object. These keys are typically used in high-security environments, such as government facilities, military bases, and certain businesses that require strict access control.
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Restricted keys are unique in that they are only able to be duplicated by authorized individuals or locksmiths who have the proper identification and authorization to do so. This helps to ensure that the key cannot be copied or used by unauthorized individuals.
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features of the profile are necessary to create a working key. By removing certain unnecessary features, a non restricted profile can be derived, allowing the production and distribution of non restricted key blanks.
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A machine permitting rapid duplication of flat metal keys, which contributed to the proliferation of their use during the 20th century, may have been first invented in the United States in 1917 (image to the left):
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in a machine, with a blank attached to a parallel vise, and the original key is moved along a guide, while the blank is moved against a blade, which cuts it. After cutting, the new key is deburred: scrubbed with a
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and as a service of the specialized locksmith, though the correct key blank may not be available. More recently, online services for duplicating keys have become available.
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Different key cutting machines are more or less automated, using different milling or grinding equipment, and follow the design of early 20th century key duplicators.
200:; while others are simply stamped "Do Not Duplicate" to advise that key control is requested, but in the US, this disclaimer has no legal weight.
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290:(unless it is an owned key), but there are patent restrictions on some key designs (see "restricted keys"). The
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based on an existing key. Key cutting is the primary method of key duplication: a flat key is fitted into a
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There is no direct legal sanction in the US for someone who copies a key that is stamped
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which, were they not removed, would be dangerously sharp and, further, foul locks.
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locksmith or manufacturer who originally cut the key. More importantly, this is a
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A minuteKEY fully-automated self-service key duplication kiosk at a
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Process of advanced security key copying on professional duplicator.
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Certain keys are designed to be difficult to copy, for
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Process of creating a new key based on an existing key
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deals with United States
Department of Defense keys.
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which is sometimes needed to cut high security keys.
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Mechanical key duplicating machine invented in 1917
49:. Unsourced material may be challenged and removed.
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302:deals with United States Post Office keys, and
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401:The Complete Book of Locks and Locksmithing.
181:Key duplication is available in many retail
327:and controlling access to sensitive areas.
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132:Video showing the process of cutting a key
167:, either built into the machine, or in a
109:Learn how and when to remove this message
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375:"Four things to know about key codes"
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154:refers to the process of creating a
47:adding citations to reliable sources
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13:
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353:"Curtis#15 parts (new and used)"
292:Associated Locksmiths of America
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34:needs additional citations for
1026:Glossary of locksmithing terms
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345:
1:
960:Perimeter intrusion detection
338:
939:Miniature snap-action switch
686:Time-delay combination locks
7:
1041:John M. Mossman Lock Museum
1031:Electromagnetic door holder
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899:Closed-circuit television
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602:
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783:Kensington Security Slot
696:Tubular pin tumbler lock
399:Phillips, Bill. (2005).
239:"Man And His Machines",
1000:Vandal-resistant switch
954:Passive infrared sensor
884:Alarm monitoring center
681:Rotary combination lock
530:Components and hardware
1056:Lock Museum of America
572:Bored cylindrical lock
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1084:Category:Locksmithing
995:Ultrasonic transducer
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965:Photoelectric sensor
919:Glass break detector
818:Real-estate lock box
717:Electromagnetic lock
589:Single-point locking
542:Interchangeable core
465:Fundamental concepts
355:. Hawley Lock Supply
253:Do not duplicate key
43:improve this article
1061:Musée de la Serrure
914:Fingerprint scanner
823:Steering-wheel lock
758:Chubb detector lock
666:Magnetic keyed lock
594:Three-point locking
243:XXXIII:6 April 1917
701:Wafer tumbler lock
661:Lever tumbler lock
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1036:Exit control lock
763:Child safety lock
656:Disc tumbler lock
507:Physical security
282:U.S. restrictions
267:Gillette, Wyoming
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58:"Key duplication"
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949:Occupancy sensor
808:Power door locks
741:Other lock types
710:Electronic locks
676:Combination lock
651:Pin tumbler lock
639:Mechanical locks
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1046:Key to the City
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975:Pressure switch
944:Motion detector
871:Security alarms
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727:Electric strike
722:Electronic lock
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487:Key duplication
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458:security alarms
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394:Further reading
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377:. CLK Supplies
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314:Restricted key
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304:18 U.S.C.
296:18 U.S.C.
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1019:Miscellaneous
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497:Master keying
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492:Key relevance
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409:0-07-144829-2
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204:Other methods
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169:bench grinder
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60: –
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54:Find sources:
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38:
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32:This article
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26:
21:
20:
1141:Locksmithing
1112:
1100:
1088:
970:Piezo switch
879:Alarm device
846:Lock bumping
838:Lock picking
798:Luggage lock
748:Bicycle lock
732:Keycard lock
625:Skeleton key
577:Mortise lock
557:Key retainer
486:
454:lock picking
450:locksmithing
400:
379:. Retrieved
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357:. Retrieved
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171:, to remove
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99:January 2021
96:
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41:Please help
36:verification
33:
1066:Puzzle lock
1051:Lock Museum
985:Reed switch
894:Card reader
803:Night latch
753:Bramah lock
646:Warded lock
482:Key control
381:12 November
359:12 November
308:§ 1386
300:§ 1704
275:key control
194:key control
929:Key switch
778:Door chain
610:Berlin key
339:References
196:, such as
165:wire brush
69:newspapers
909:Dual loop
889:Car alarm
851:Locksport
773:Dead bolt
768:Crash bar
691:Time lock
630:Smart key
547:Key blank
1135:Category
990:Tripwire
861:Snap gun
856:Slim Jim
828:The Club
788:Knox Box
620:Keychain
582:Rim lock
552:Key code
512:Rekeying
502:Password
237:—
671:Padlock
615:Car key
567:Lockset
562:Lockrod
537:Bitting
263:Menards
83:scholar
934:Keypad
456:, and
407:
306:
298:
198:Medeco
85:
78:
71:
64:
56:
1107:Locks
956:(PIR)
793:Latch
446:Locks
173:burrs
90:JSTOR
76:books
1119:Book
1095:Keys
603:Keys
405:ISBN
383:2019
361:2019
160:vise
62:news
265:in
215:VIN
156:key
45:by
1137::
452:,
448:,
217:.
438:e
431:t
424:v
411:.
385:.
363:.
112:)
106:(
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97:(
87:·
80:·
73:·
66:·
39:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
