SEARCH OUR SITE COMMERCIAL SECURITY MECHANICAL SECURITY ELECTRONIC SECURITY ELECTRONIC SECURITY NEWS & ARTICLES SCHLAGE RESIDENTIAL SECURITY SCHLAGE BRAND PRODUCT CATALOGS INGERSOLL RAND BRANDS INGERSOLL RAND MARKET SOLUTIONS       Home > Primus XP > Glossary of Terms Primus XP Glossary of Terms Table of Contents Schlage Key Systems Restricted Key System Patented Restricted Key System Patented Open Key System End User Keyways Schlage Primus Terms Primus Cylinder Side-bit Milling Primus Finger Pin Everest Classic Primus Primus Everest Sidebar General Key System Definitions Open Patented Key Restricted Key High Security Cylinder UL437 High Security Cylinder Standard Key Terms, Symbols and Definitions Change Key File Key Control Key Construction Key Construction Control Key Great Grand Master Key Grand Master Key Master Key Single Keyed Different Special Keying Operation Terms and Symbols Controlled Cross Keying Maison No Master Key Uncontrolled Cross Keying Standard Key System Terms Bitting Bitting List Combination Key Interchange Key Records Key Symbol Key System Schematic Keying Keying Chart Keying Schedule Levels of Keying Proprietary System Restricted Visual Key Control Standard Key, Cylinder and Miscellaneous Definitions Bow Broach Cam Chamber Construction Core Cylinder Indicator Interchangeable Core Cylinder Key Key Blank Key Control Key Section Key Storage Cabinet Keyway Lock Block Multiple Keyway Multi-Section Blank Plug Sectional Key Blank Sectional Keyway System Shear Line Side Bar Schlage Key Systems Back to Top Restricted Key System - A restricted key system is a key system and corresponding key blanks whose sale is limited by its distribution. Note that a restricted key system is not necessarily a patented key system. Examples of Schlage restricted key systems are Quad key sections. Patented Restricted Key System - A patented restricted key system is protected by legally enforceable patent protection from "look alike" key blanks and cylinders being manufactured and sold into the market. Example of Schlage patented restricted key systems are Everest D, Everest B and Primus XP. Note that not all patented restricted key systems are high security or UL437 listed. Schlage offers all types of patented restricted key systems according to the customer's needs. Patented Open Key System - A patented key system where the sales of keys and components are not restricted in any way. End User Keyways - Keyways and related products that are sold to end users for their exclusive use. End user keyways are not available for resale and are not used by commercial locksmiths. Schlage Primus Terms Back to Top Primus Cylinder - Primus is a patented sidebar cylinder and key designed for key control, pick resistance and attack resistance. Primus is Schlage's highest security cylinder and is available in two families of keyways, Classic and Everest. Side-bit Milling - A secondary milling on the key into the keyway that can have multiple unique patterns and operate through a corresponding secondary set of pins (finger pins) within the cylinder. Primus Finger Pin - A unique L-shaped pin that needs to be swiveled and raised by the corresponding side-bit milling for operation of the lock. Everest - One of Schlage's keyways with a patented undercut groove. It is available as full size and SFIC cylinders. Classic Primus - One of Schlage's Classic keyways cylinder that contains the Primus locking mechanism as a secondary locking feature. Primus Everest - An Everest cylinder that contains the Primus locking mechanism as a secondary locking feature. Side Bar - A secondary locking device in a cylinder. General Key System Definitions Back to Top Open - A Non Patented Key System has usually been manufactured for many years and offers no protection from key duplication. Patented Key - A patented key is protected by legally enforceable patent protection from "look alike" key blanks being manufactured and sold into the market. Restricted Key - A restricted key is a key or corresponding key blank whose sale is limited by its distribution. Note that a restricted key is not necessarily a patented key. High Security Cylinder - A High Security cylinder offers a greater degree of resistance to picking, key duplication, drilling or other forms of forcible entry. Note that not all High Security Cylinders are UL437 listed. UL437 High Security Cylinder - A High Security Cylinder that meets UL437 requirements. Standard Key Terms, Symbols and Definitions Back to Top Key Term and Symbol Definition Change Key (CK) A key operating only one cylinder or one group of cylinders keyed alike in a keying system. Symbol Examples: AA1 1st Change under MK   A1 1st Change under GMK   GGMK1 1st Change under GGMK File Key A key, of any type, attached to a permanent tag and kept on file in a key storage cabinet. This key is to be checked out for use in special circumstances only and not leave the facility. Control Key (CONTROL) A key to remove or install an interchangeable or removable core. Symbol Example: CONTROL GGMK Operates all symbols in a system unless otherwise specified by level. Can be used at CK, MK or GMK. Construction Key A key to be used by the trades during the construction phase of a project. Symbol Examples: ICA Construction System A   ICB Construction System B   ICC Construction System C Construction Control Key A key used to operate designated cylinders during the construction phase of a project. Symbol Examples: ICA Construction System A   ICB Construction System B   ICC Construction System C Great Grand Master Key (GGMK) A key operating two or more separate groups of cylinders, each operated by a different grand master key. Symbol Example: GGMK Operates all symbols in keying system unless otherwise specified. Grand Master Key (GMK) A key operating two or more separate groups of cylinders, each operated by a different master key. Symbol Examples: A 1st GMK under GGMK   B 2nd GMK under GGMK   C 3rd GMK under GGMK Master Key (MK) A key operating all master keyed locks or cylinders in a group, each lock or cylinder is usually operated by it's own change key. Symbol Examples: AA 1st MK under GMK A   AB 2nd MK under GMK A   AC 3rd MK under GMK A Single Keyed Different (SKD) Indicates that a cylinder is not operated by any other key other but it is still part of the key system. Symbol Examples: SKD1 1st operation by itself   SKD2 2nd operation by itself   SKD3 3rd operation by itself Special Keying Operation Terms and Symbols Back to Top Operating Symbol Term Definition Controlled Cross Keying (X__ __ __) Caution - Limit Use A condition where two or more different change keys, under the same master key and in numerical order, operate one cylinder by design. This operation has an individual change key and should be used in extreme controlled circumstances only. Symbol Examples: XAA1 Symbol designation for Cross Keying   Must specify operation: XAA1 To be operated by AA2, AA, A, GGMK Maison (X __ __ __ X) Caution - Limit Use A lock or cylinder operated by specially designated keys within the key system. No individual operating key. Symbol Examples: X1X 1st symbol designation "To Be Operated" by key symbols designated.   X2X 2nd symbol designation "To Be Operated" by key symbols designated.   Must specify operation: X1X To be operated by AA1, AA2, AA3, AA4, AA5, AA, A and GGMK. No Master Key NMK Cylinder keyed alike to another except MK does not operate. Symbol Example: AA1 (NMK)   Uncontrolled Cross Keying (X__ __ __) DO NOT USE A condition where two or more different CK's, MK's or GMK's, are requested to operate an individual lock or cylinder. This results in an empty keyed cylinder and unauthorized key operation. Symbol Examples: XAA1 Symbol designation for Cross Keying   Must specify operation: XAA1 To be operated by AA2, BA5, CC13, A, B, C, and GGMK Standard Key System Terms Back to Top Key System Term Definition Bitting 1. The numbers that represent the depth of the key cuts. 2. The actual cut or combination of a key. Bitting List A listing of the key combinations used within a key system Combination The group of numbers representing the bitting of a key or the tumblers in a lock or cylinder. Key Interchange An undesirable condition where a key unintentionally operates a cylinder of lock. Commonly found when using "Uncontrolled Keying". Key Records Records including some or all of the following: bitting list, Key System Schematic, end user, number of keys or cylinders issued, names of person to whom the keys were issued, hardware or keying schedule. Key Symbol A designation used for a key combination in the standard key coding system. Example: AA1, AA, A Key System Schematic A visual chart depicting the key system. Keying Any specification for how a cylinder is, or a group of cylinders are, combinated. Keying Chart See "Bitting List" Keying Schedule A detailed specification of the keying system listing how all cylinders are to be keyed and the quantities, markings, and shipping instructions of all the keys and or cylinders to be provided. Levels of Keying The divisions of a key system into hierarchies of access. Proprietary System A system used with a keyway, key section or special key millings assigned exclusively to one or more end users by the lock manufacturer. It may also be patent protected by law from duplication to ensure the integrity or the system for aftermarket manufacturers. Restricted A keyway and corresponding key blank whose sale is limited by the lock manufacturer to reduce unauthorized key duplication. However, "Restricted" does not stop aftermarket manufactures keyblank manufacturers from producing and selling the keyblanks to other forms of distribution. Visual Key Control The markings of keys and/or cylinders with standard key symbols Standard Key, Cylinder and Miscellaneous Definitions Back to Top Term Definition Bow The part of the key used as a grip or handle. Broach The cut of the keyway into the cylinder plug with a broaching tool. Cam An actuator attached to the rear end of a cylinder and operated by the key. Chamber A cavity in a cylinder plug or shell which houses the tumblers. Construction Core An interchangeable core designed for use during the construction phase of a project. The cores are normally keyed alike and replaced by the permanently keyed cores at the completion of construction. Cylinder A complete operating unit, usually consisting of a plug, shell, tumblers, springs, cam or tailpiece and all other necessary operating part. Indicator A device providing visual evidence that the lock is "locked" or in a shut out mode. Interchangeable Core Cylinder A cylinder containing both the upper pin chamber and plug in an integral unit removable by a special control key and interchangeable with other cores in the system. Key A properly milled device used to operate a corresponding cylinder. Key Blank Milled material to the size and configuration to allow its entry into the keyway of a specific locking device. A key blank has not yet been cut with the combinations to allow operation of the cylinder or lockset. Key Control A method or procedure limiting unauthorized acquisition of a key and/or controlling distribution of authorized keys. This includes a systematic method of recording and tracking of the keys issued to end users. Key Section The cross section configuration of a key blade as viewed from the tip toward the bow. Key Storage Cabinet A secured cabinet used to store "File" or spare keys Keyway Broaching in a cylinder plug. Lock Block A key capturing device containing 2 cylinders. When key A is inserted into cylinder A and rotated, key B can be removed from cylinder B trapping key A in cylinder A. After use, key B is reinserted into cylinder B and rotated to its starting position allowing key A to be removed and trapping key B. Multiple Keyway Plugs with a different keyway broaching or key section with higher level keys milled to operate more than one keyway. Multi-Section Blank A key milled to enter more than one key broaching in a multiple keyway system. Plug The part of the cylinder containing the keyway broaching and tumblers chambers manufactured to correspond with the cylinder shell. Sectional Key Blank See Multi-Sectional Blank Sectional Keyway System See Multi Keyway Section Shear Line The location in the cylinder where the tumblers will line up when the proper key is inserted and permit the plug to be actuated. Side Bar A secondary locking device in a cylinder.

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