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Glossary of Terms

Rabbeted Door

(n.) A door having and edge contoured with an offset creating two surfaces which form an overlap at the abutting edge.
Source: Lock Industry Standards and Training (LIST) Council

Rabbeted Lock

(n.) A lock with a face or front which is specially formed to use in a rabbeted door.
Source: Lock Industry Standards and Training (LIST) Council

Radio Frequency Identification

(n.) An identification technology using short range radio frequency transmission.
Source: Lock Industry Standards and Training (LIST) Council

Radiused Blade Bottom

(n.) The bottom of a key blade which has been radiused to conform to the curvature of the cylinder plug it is designed to enter.
Source: Lock Industry Standards and Training (LIST) Council

Rail

(n.) The horizontal construction member located on the top and bottom of a door.
Source: Lock Industry Standards and Training (LIST) Council

Rake (Rake & Hang)

(n.) A picking technique that attempts to use quick withdrawal of the pick to set the tumblers.
Source: Lock Industry Standards and Training (LIST) Council

Random Master Keying

(n.) Any undesirable process used to master key which uses unrelated keys to create a system.
Source: Lock Industry Standards and Training (LIST) Council

Rap

(v.) 1. To unlock a plug from its shell by striking sharp blows to the spring side of the cylinder while applying tension to the plug.
(v.) 2. To unlock a padlock shackle from its case by striking sharp blows to the sides in order to disengage the locking dogs.
Source: Lock Industry Standards and Training (LIST) Council

Ratchet Lock

(n.) A lock which adjusts to fit different applications by sliding one part through another, held by a pawl engaging one of several cogs.
Source: Lock Industry Standards and Training (LIST) Council

Rated

(adj.) Of or pertaining to a product's compliance with one or more recognized standards such as UL.
Source: Lock Industry Standards and Training (LIST) Council

Read

(v.) To decode a lock combination visually without disassembly of the lock or cylinder.
Source: Lock Industry Standards and Training (LIST) Council

Read Key

(n.) A key which allows access to the sales and/or customer data on certain types of cash control equipment (e.g., cash register).
Source: Lock Industry Standards and Training (LIST) Council

Reader

(n.) A device used in an access control system to interrogate an electronic, magnetic or optical type of credential.
Source: Lock Industry Standards and Training (LIST) Council

Rear Drive

(adj.) Of or pertaining to a combination lock with the wheel pack located between the dial and the drive cam.
Source: Lock Industry Standards and Training (LIST) Council

Recombinate

(v.) To change the combination of a lock, cylinder or key.
Source: Lock Industry Standards and Training (LIST) Council

Record Safe

(n.) A safe whose primary purpose is to preserve paper documents against fire.
Source: Lock Industry Standards and Training (LIST) Council

Recore

(v.) To rekey by installing a different core.
Source: Lock Industry Standards and Training (LIST) Council

Redundant Button

(n.) A secondary release switch for an egress device to allow unlocking in case of a malfunction of the primary release switch.
Source: Lock Industry Standards and Training (LIST) Council

Register Groove

(n.) The reference point in the milling of a key blade from which some manufacturers index the bitting depths, and which indexes the key blade in a keyway.
Source: Lock Industry Standards and Training (LIST) Council

Register Number

(n.) 1. A reference number, typically assigned by the lock manufacturer to an entire master key system.
(n.) 2. A blind code assigned by some lock manufacturers to higher level keys in a master key system.
Source: Lock Industry Standards and Training (LIST) Council

Rekey

(v.) To change the existing combination of a cylinder or lock.
Source: Lock Industry Standards and Training (LIST) Council

Relock Trigger

(n.) The part of a safe relocking device which causes the mechanism to activate.
Source: Lock Industry Standards and Training (LIST) Council

Relocking Device

(n.) Any device intended to prevent normal opening of a safe as a result of an attack, two types are typically used, internal and external.
Source: Lock Industry Standards and Training (LIST) Council

Remote Release

(n.) A mechanism for permitting the unlocking of any lock device at a distance from the device.
Source: Lock Industry Standards and Training (LIST) Council

Removable Core

(n.) A key removable core which can only be installed in one type of cylinder housing; e.g., rim cylinder or mortise cylinder or key-in-knob lock.
Source: Lock Industry Standards and Training (LIST) Council

Removable Cylinder

(n.) A cylinder which can be removed from a locking device by a key and/or tool.
Source: Lock Industry Standards and Training (LIST) Council

Removable Dial

(n.) A combination lock actuator that may be taken from the lock when not in use.
Source: Lock Industry Standards and Training (LIST) Council

Removable Shackle

(adj.) Referring to a type of padlock which is unlocked by removing the shackle from the case.
Source: Lock Industry Standards and Training (LIST) Council

Removal Key

(n.) The part of a two-piece key which is used to remove its counterpart from a keyway.
Source: Lock Industry Standards and Training (LIST) Council

Renter's Key

(n.) A key which must be used together with a guard key, prep key or electronic release to unlock a safe deposit lock. It is usually different for every unit within an installation.
Source: Lock Industry Standards and Training (LIST) Council

Repin

(v.) To replace pin tumblers, with or without changing the existing combination.
Source: Lock Industry Standards and Training (LIST) Council

Reset Code

(n.) In an electronic lock, a factory-set or user-set code or combination that will restore all factory default settings except the current reset code and the audit trail.
Source: Lock Industry Standards and Training (LIST) Council

Reset Key

(n.) 1. A key used to set some types of cylinders to a new combination. Many of these cylinders require the additional use of tools and/or the new operating key to establish the new combination.
(n.) 2. A key which allows the tabulations on various types of cash control equipment (e.g., cash registers) to be cleared from the records of the equipment.
Source: Lock Industry Standards and Training (LIST) Council

Resettable Tumbler

(n.) A tumbler which can have its reference position altered by reorientation within the cylinder without disassembly.
Source: Lock Industry Standards and Training (LIST) Council

Resistor Pellet

(n.) The encapsulated resistor with exposed contacts installed in a key, such as that for VATS.
Source: Lock Industry Standards and Training (LIST) Council

Restraint

(n.) A device designed with a shackle that restricts the movement or actions of a person, such as handcuffs.
Source: Lock Industry Standards and Training (LIST) Council

Restricted

(adj.) Of or pertaining to a keyway and corresponding key blank whose sale and/or distribution is limited by the lock manufacturer in order to reduce unauthorized key proliferation.
Source: Lock Industry Standards and Training (LIST) Council

Retainer

(n.) A component which is clipped, staked, or driven in place to maintain the working relationship of other components.
Source: Lock Industry Standards and Training (LIST) Council

Retainer Pin

(n.) 1. A component seated on a spring, in the end of a plug, that interacts with a retainer cap to keep it in place.
(n.) 2. Any non-threaded rod that maintains the relationship of two or more different parts.
Source: Lock Industry Standards and Training (LIST) Council

Retrofit Lever

(n.) A lever handle designed to replace the knob of a lockset.
Source: Lock Industry Standards and Training (LIST) Council

Return

(n.) 1. The extension of a cam which bends back towards the mounting surface and the measurement of the remaining distance from the mounting surface to the end of the cam.
(n.) 2. The distance from a door face to the tip end of a lever handle.
Source: Lock Industry Standards and Training (LIST) Council

Reveal

(n.) The distance measured from the trim surface of the jamb to the leading face of the door on the stop side when closed.
Source: Lock Industry Standards and Training (LIST) Council

Reverse Bevel

(adj.) Pertaining to the bevel of a door which swings towards the outside.
Source: Lock Industry Standards and Training (LIST) Council

Reverse Keyway

(n.) A keyway shape that is a mirror image of another.
Source: Lock Industry Standards and Training (LIST) Council

Reverse Strike

(n.) A strike used for rim mounted hardware used on reverse bevel doors.
Source: Lock Industry Standards and Training (LIST) Council

Reversible

(adj.) Pertaining to hardware that is manufactured in a way, which allows field assembly or adjustment to accommodate installation on doors with different orientations.
Source: Lock Industry Standards and Training (LIST) Council

Reversible Key

(n.) A usually symmetrical key which may be inserted either way up to operate a lock.
Source: Lock Industry Standards and Training (LIST) Council

RF

(abb.) Radio Frequency
Source: Lock Industry Standards and Training (LIST) Council

RFID

(abb.) Radio Frequency Identification
Source: Lock Industry Standards and Training (LIST) Council

RH

(abb.) Right Hand
Source: Lock Industry Standards and Training (LIST) Council

RHR

(abb.) Right Hand Reverse Bevel
Source: Lock Industry Standards and Training (LIST) Council

RHVD

(abb.) Right Hand Vertical Down
Source: Lock Industry Standards and Training (LIST) Council

RHVU

(abb.) Right Hand Vertical Up
Source: Lock Industry Standards and Training (LIST) Council

Right Hand (Man Door)

(adj.) Pertaining to an inward swinging door with hinges on the right side, using the outside of the door as reference.
Source: Lock Industry Standards and Training (LIST) Council

Right Hand Reverse Bevel (Door)

(adj.) Pertaining to a right handed door which swings outward.
Source: Lock Industry Standards and Training (LIST) Council

Rim Cylinder

(n.) A cylinder typically used with surface applied locks and attached with a back plate and machine screws. It has a tailpiece to actuate the lock mechanism.
Source: Lock Industry Standards and Training (LIST) Council

Rim Exit Device

(n.) An exit device mounted on the door surface.
Source: Lock Industry Standards and Training (LIST) Council

Rim Lock

(n.) A lock designed to be mounted on the surface or rim of a door or object.
Source: Dictionary.com
(n.) A lock or latch typically mounted on the surface of a door or drawer.
Source: Lock Industry Standards and Training (LIST) Council

Rim Vertical Rod Exit Device

(n.) A vertical rod exit device mounted on the door surface.
Source: Lock Industry Standards and Training (LIST) Council

Ring Key

(n.) A key attached to a ring to be worn on the finger.
Source: Lock Industry Standards and Training (LIST) Council

RL

(abb.) The title "Registered Locksmith" as awarded by ALOA.
Source: Lock Industry Standards and Training (LIST) Council

RLD

(abb.) Relocking Device
Source: Lock Industry Standards and Training (LIST) Council

RM

(abb.) Row Master Key
Source: Lock Industry Standards and Training (LIST) Council

Root Depth

(n.) The dimension from the bottom of a cut on a key to the bottom of the blade.
Source: Lock Industry Standards and Training (LIST) Council

Rose

(n.) A usually circular escutcheon.
Source: Lock Industry Standards and Training (LIST) Council

Rotary File Cutter

(n.) A key machine cutter with very fine teeth which are formed by stamping, such as a file.
Source: Lock Industry Standards and Training (LIST) Council

Rotary Tumbler

(n.) A circular tumbler with one or more gates. Rotation of the proper key aligns the tumbler gates at a sidebar, fence or shackle slot.
Source: Lock Industry Standards and Training (LIST) Council

Rotating Constant Method

(n.) A method used to progress key bittings in a master key system, wherein at least one cut in each key is identical to the corresponding cut in the top master key. The identical cut(s) is moved to different locations in a logical sequence until each possible planned position has been used.
Source: Lock Industry Standards and Training (LIST) Council

Rotating Constant

(n.) One or more cut(s) in a key of any level which remain constant throughout all levels and are identical to the top master key cuts in their corresponding positrons. The positions where the top master key cuts are held constant may be moved, always in a logical sequence.
Source: Lock Industry Standards and Training (LIST) Council

Round Back

(adj.) Pertaining to a rim cabinet lock whose mounting flanges and case form the general shape of a circle when viewed from the back.
Source: Lock Industry Standards and Training (LIST) Council

Round Cornered Latch

(adj.) Of or pertaining to a latch mounting plate with radiused corners.
Source: Lock Industry Standards and Training (LIST) Council

Rounded Front

(n.) A lock front or face plate that is radiused to match the edge of the door.
Source: Lock Industry Standards and Training (LIST) Council

Row Master Key

(n.) The one-pin master key for all combinations listed on the same line across a page in the standard progression format.
Source: Lock Industry Standards and Training (LIST) Council

RS-485

(std.) An Electronics Industry Association (EIA) standard for serial multipoint communications commonly used in online access control systems for distances up to 4000 feet.
Source: Lock Industry Standards and Training (LIST) Council