ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Cylindrical Locksets

Updated on November 2, 2018
Tom Rubenoff profile image

Tom has 17 years experience as a commercial locksmith and over 20 years in door hardware distribution.

Sargent 10-Line Cylindrical Lever
Sargent 10-Line Cylindrical Lever | Source
Schlage A Series Knob
Schlage A Series Knob | Source

Cylindrical locks are perhaps the most popular kind of lock. They are widely used in both commercial and residential applications. The term 'cylindrical' describes the shape of the lock chassis.

In the above photos are a cylindrical lever lock and a cylindrical knob lock. Their mechanisms are very similar. Both are available in several functions (detailed later in this article) that make it useful for various applications. Some functions are operated by key and some functions are non-keyed.

Keyed cylindrical locks are easy to identify. Looking at the door from the key side, a person can easily see that the keyhole is located in the lever or knob as opposed to above the lock. That is why cylindrical locks are also often called "key in lever" or "key in knob" locks. On the edge of the door - the part you can't see when the door is closed - you will find the latch. The latch face plate is usually 2-1/4 inches tall by 1-1/8 or 1 inch wide.

Because of the American Disabilities Act (ADA), commercial applications almost always require levers. Levers can also be used in residential applications. Knobs are used almost exclusively in residential applications.

Cylindrical locks are graded for various applications by ANSI.

  • ANSI Grade 1 cylindrical locks are for use in high traffic and/or high abuse applications such as high rise office or residential buildings, factories, warehouses, retail stores and schools.
  • ANSI Grade 2 cylindrical locks are for use primarily in light commercial applications such as small offices or in residential applications.
  • ANSI Grade 3 cylindrical locks are used mainly in residential applications.

Illustrated Cylindrical Lock

Above is an illustration detailing the major components that make up a cylindrical lockset. Knowing the names of these components is helpful when speaking to your security professional. Notice that the lock has relatively few major parts. Over time cylindrical lock design has been improved. Today's cylindrical locks are durable and can last for many years.

Shown below is the key cylinder. Cylindrical lock cylinders are available in all keyways for integration into new and existing key systems. Cylindrical lock cylinders vary between manufacturers. Sometimes a cylinder made by one manufacturer will fit in a lock by another manufacturer, but sometimes not.

Cylindrical lock key cylinder.
Cylindrical lock key cylinder. | Source

Cylindrical Lock Functions

Lock function describes the way a lock works. Below are listed a few common cylindrical Lock functions. Most commercial grade cylindrical lock functions have ANSI number designations which I have included. To simplify the descriptions I will refer to both knobs and levers as 'handles'.

Non-Keyed Functions

  • Passage - ANSI F75

  • Both inside and outside handles always unlocked.

  • Privacy ANSI F76

  • Both inside and outside handles unlocked unless outside handle is locked by pushing button on inside handle. Outside handle unlocked by closing door, turning inside handle, or outside emergency turn slot.

Keyed Functions

  • Entry ANSI F82

  • Button on inside handle locks outside handle. Pushing button allows outside lever to be unlocked by turning inside handle or outside key; pushing and turning button clockwise causes outside handle to remain locked until button is turned counterclockwise and inside handle is turned. Inside handle always unlocked. When outside lever is locked, key retracts latch.

  • Storeroom ANSI F86

  • Outside handle always locked. Key retracts latch. Inside handle always unlocked.

  • Classroom ANSI F84

  • Inside handle always unlocked. Outside handle locked and unlocked by key in outside handle.

Electromechanical Cylindrical Locks:

  • Fail Safe

  • Outside handle locked when power is on. Key retracts latch.

  • Fail Secure

  • Outside handle locked with power is off. Key retracts latch.

Types of Latches

Below is an illustration of the deadlatch belonging to a cylindrical lock. Notice the auxiliary deadlatch, or deadlocking feature. Used mainly on keyed functions, the auxiliary deadlatch remains depressed when the main latch extends into the strike plate, activating a deadlocking feature within the latch that inhibits shimming or jimmying the deadlatch.

Deadlatches are usually (but not always) used with keyed functions. Non-keyed functions such as privacy and passage sets use spring latches, which have no auxiliary deadlatch.

ANSI 161 prep
ANSI 161 prep | Source

Cylindrical Lock Prep

The above illustration shows the door prep for a standard cylindrical lock. In door manufacturer language this is known as ANSI 161 prep. The "bore" is a 2-1/8" hole drilled through the face of the door. The "cross-bore" is a hole drilled from the edge of the door into the bore at the centerline. The edge of the door is mortised, stamped or machined to accommodate the latch face. The distance from the edge of the door to the centerline of the bore is called the "backset". Typical backset for a commercial application cylindrical lock is 2-3/4 inches.

Grade 1 cylindrical levers almost always have through-bolts outside the bore, usually at six and twelve o'clock, while Grade 2 levers sometimes do and Grade 3 levers hardly ever have them.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)