{"id":3872,"date":"2026-04-09T09:14:40","date_gmt":"2026-04-09T07:14:40","guid":{"rendered":"https:\/\/multisecu.fr\/produits-de-serrurerie\/serrure-a-double-panneton-mecanisme-histoire-et-securite\/"},"modified":"2026-10-11T11:24:23","modified_gmt":"2026-10-11T09:24:23","slug":"serrure-a-double-panneton-mecanisme-histoire-et-securite","status":"publish","type":"post","link":"https:\/\/www.multisecu.fr\/en\/produits-de-serrurerie\/serrure-a-double-panneton-mecanisme-histoire-et-securite\/","title":{"rendered":"Double-Bitted Locks: Recognising the Key and Mechanism"},"content":{"rendered":"<article class=\"wp-block-group ms-conseils ms-conseils-article is-layout-flow wp-block-group-is-layout-flow\">\n<section class=\"wp-block-group msc-section msc-hero is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-breadcrumb wp-block-paragraph\"><a href=\"\/en\/\">Home<\/a><span>\/<\/span><a href=\"\/en\/blog-2\/\">Blog<\/a><span>\/<\/span><a href=\"\/en\/category\/glossaire\/\">Locksmith glossary<\/a><\/p>\n\n\n<div class=\"wp-block-group msc-hero-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-hero-copy is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">GLOSSARY \u00b7 MECHANISMS &amp; KEYS<\/p>\n\n\n<h1 class=\"wp-block-heading\">Double-Bitted Locks: Recognising the Key and Mechanism<\/h1>\n\n\n<p class=\"msc-lead wp-block-paragraph\">A double cam key features two parts cut around its shaft. It is associated with certain groove mechanisms, particularly on older locks or equipment from different generations.<\/p>\n\n\n<p class=\"msc-meta wp-block-paragraph\">HISTORY &amp; DEFINITION <span>\u00b7<\/span> 2-MINUTE READ<\/p>\n\n<\/div>\n\n\n<figure class=\"wp-block-image size-full msc-photo msc-hero-photo msc-contain\"><img decoding=\"async\" width=\"1280\" height=\"1280\" src=\"https:\/\/www.multisecu.fr\/wp-content\/uploads\/2026\/10\/mottura-serie-50-double-panneton.jpg\" alt=\"Mottura series 50 double cam lock\" class=\"wp-image-4340\" srcset=\"https:\/\/www.multisecu.fr\/wp-content\/uploads\/2026\/10\/mottura-serie-50-double-panneton.jpg 1280w, https:\/\/www.multisecu.fr\/wp-content\/uploads\/2026\/10\/mottura-serie-50-double-panneton-300x300.jpg 300w, https:\/\/www.multisecu.fr\/wp-content\/uploads\/2026\/10\/mottura-serie-50-double-panneton-1024x1024.jpg 1024w, https:\/\/www.multisecu.fr\/wp-content\/uploads\/2026\/10\/mottura-serie-50-double-panneton-150x150.jpg 150w, https:\/\/www.multisecu.fr\/wp-content\/uploads\/2026\/10\/mottura-serie-50-double-panneton-768x768.jpg 768w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><figcaption class=\"wp-element-caption\">Example of a double-bitted key lock \u00b7 Mottura series 50<\/figcaption><\/figure>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group msc-section msc-story is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-reading is-layout-flow wp-block-group-is-layout-flow\">\n<nav class=\"wp-block-group msc-toc is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">IN THIS GUIDE<\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"#chapitre-1\">What does \u201cpanneton\u201d mean?<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"#chapitre-2\">What appearance alone cannot reveal<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"#chapitre-3\">Maintaining and identifying an existing lock<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><a href=\"#chapitre-4\">Repair or upgrade the locking system<\/a><\/p>\n\n\n<p class=\"msc-toc-back wp-block-paragraph\"><a href=\"\/en\/category\/glossaire\/\">\u2190 All glossary terms<\/a><\/p>\n\n<\/nav>\n\n\n<div class=\"wp-block-group msc-prose is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-takeaway is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">KEY POINTS<\/p>\n\n\n<p class=\"wp-block-paragraph\">The key's shape is insufficient to determine a lock's resistance. The design, reference, and overall condition must be assessed.<\/p>\n\n<\/div>\n\n\n<section id=\"chapitre-1\" class=\"wp-block-group msc-chapter is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading\">What does \u201cpanneton\u201d mean?<\/h2>\n\n\n<p class=\"wp-block-paragraph\">The cam is the part of the key whose shape interacts with the mechanism. On a double-cam key, two sets of cuts are located on either side of the shaft. This design differs from the flat key commonly used with many cylinders.<\/p>\n\n\n<p class=\"wp-block-paragraph\">In a tongue mechanism, the key positions internal components to allow the locking movement. This is the principle of operation: the details vary significantly from one lock to another.<\/p>\n\n<\/section>\n\n\n<section id=\"chapitre-2\" class=\"wp-block-group msc-chapter is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading\">What appearance alone cannot reveal<\/h2>\n\n\n<p class=\"wp-block-paragraph\">A large key is not necessarily more resistant to replication or forced entry. Conversely, apparent age does not justify replacing the entire mechanism.<\/p>\n\n\n<p class=\"wp-block-paragraph\">The brand, reference, protections, and any applicable certifications are more reliable indicators. It is also important to examine the lock's mounting, the condition of the strike plates, and the door's solidity.<\/p>\n\n<\/section>\n\n\n<section id=\"chapitre-3\" class=\"wp-block-group msc-chapter is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Maintaining and identifying an existing lock<\/h2>\n\n\n<p class=\"wp-block-paragraph\">A worn, bent key or a mechanism that sticks requires a check. Avoid applying excessive force. Keep a good condition sample and request reproduction conditions appropriate to the brand.<\/p>\n\n\n<p class=\"wp-block-paragraph\">For initial identification, photograph the housing, the door edge, and any markings. Detailed key views should only be sent to the relevant professional and must not be published online. Do not disassemble a complex housing to manually identify the reference.<\/p>\n\n<\/section>\n\n\n<section id=\"chapitre-4\" class=\"wp-block-group msc-chapter is-layout-flow wp-block-group-is-layout-flow\">\n<h2 class=\"wp-block-heading\">Repair or upgrade the locking system<\/h2>\n\n\n<p class=\"wp-block-paragraph\">A repair may be considered when compatible parts are available and the overall system remains viable. Some installations allow an upgrade to a different system; this depends on the lock and the door type.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Replacement is therefore neither automatic nor universal. MULTISECU checks dimensions, operation, and security requirements before proposing a solution. A conversion must preserve door usage and comply with installed component conditions.<\/p>\n\n<\/section>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group msc-section msc-related is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">FIND OUT MORE<\/p>\n\n\n<h2 class=\"wp-block-heading\">Related guides.<\/h2>\n\n\n<div class=\"wp-block-group msc-related-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-related-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">GLOSSARY \u00b7 HISTORY<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/www.multisecu.fr\/en\/blog\/histoire-de-la-serrure\/\">The History of Locks: From Mechanical to Electronic Access <span aria-hidden=\"true\">\u2197<\/span><\/a><\/h3>\n\n\n<p class=\"wp-block-paragraph\">To protect a passage, reserve access, or preserve belongings: these needs have accompanied the evolution of the lock. Its history can be read through the materials, mechanisms, and the way a key is recognised.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group msc-related-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">GLOSSARY \u00b7 TYPES OF INSTALLATION<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/www.multisecu.fr\/en\/blog\/types-serrures\/\">Mortice, rim or full-length covered lock: recognise the fitting type <span aria-hidden=\"true\">\u2197<\/span><\/a><\/h3>\n\n\n<p class=\"wp-block-paragraph\">A lock can be described by how it operates, how many locking points it has and how it is fitted. Mortice, rim and covered multipoint locks differ primarily in how the mechanism is installed and enclosed on the door.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group msc-related-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">Cylinders &amp; keys<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/www.multisecu.fr\/en\/conseils\/choisir-son-cylindre-de-serrure\/\">Choosing the Right Lock Cylinder <span aria-hidden=\"true\">\u2197<\/span><\/a><\/h3>\n\n\n<p class=\"wp-block-paragraph\">The right cylinder is one that matches your lock, your dimensions, and your usage. Before comparing brands, gather the information that ensures a reliable choice.<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group msc-section msc-call-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-call is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group msc-call-copy is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"msc-kicker wp-block-paragraph\">MULTISECU ADVICE<\/p>\n\n\n<h2 class=\"wp-block-heading\">Have a project or a lock<br>you would like us to check?<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Present your requirement and installation. In Annecy and the surrounding areas, we help you distinguish between adjustment, repair, and replacement.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"\/en\/contact\/\">Tell us what you need \u2197<\/a><\/div>\n\n\n<div class=\"wp-block-button is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link wp-element-button\" href=\"\/en\/tarifs\/\">View prices<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n<\/article>","protected":false},"excerpt":{"rendered":"<p>A double cam key features two parts cut around its shaft. It is associated with certain groove mechanisms, particularly on older locks or equipment from different generations.<\/p>","protected":false},"author":5,"featured_media":4340,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,23],"tags":[],"class_list":["post-3872","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossaire","category-produits-de-serrurerie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Double-Bitted Locks: Recognising the Key and Mechanism | MULTISECU<\/title>\n<meta name=\"description\" content=\"Double cam key and tongue lock: identify this family of mechanisms, understand its operation and prepare an appropriate replacement.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.multisecu.fr\/en\/produits-de-serrurerie\/serrure-a-double-panneton-mecanisme-histoire-et-securite\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Double-Bitted Locks: Recognising the Key and Mechanism | MULTISECU\" \/>\n<meta property=\"og:description\" content=\"Double cam key and tongue lock: identify this family of mechanisms, understand its operation and prepare an appropriate replacement.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.multisecu.fr\/en\/produits-de-serrurerie\/serrure-a-double-panneton-mecanisme-histoire-et-securite\/\" \/>\n<meta property=\"og:site_name\" content=\"MULTISECU Serrurier Annecy\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-09T07:14:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-11T09:24:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/multisecu.fr\/wp-content\/uploads\/2026\/10\/mottura-serie-50-double-panneton.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"1280\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Romain ROSA\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Romain ROSA\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.multisecu.fr\\\/produits-de-serrurerie\\\/serrure-a-double-panneton-mecanisme-histoire-et-securite\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.multisecu.fr\\\/produits-de-serrurerie\\\/serrure-a-double-panneton-mecanisme-histoire-et-securite\\\/\"},\"author\":{\"name\":\"Romain ROSA\",\"@id\":\"https:\\\/\\\/www.multisecu.fr\\\/#\\\/schema\\\/person\\\/c4360f76348cbf8ab4a182754e6bcef3\"},\"headline\":\"Serrure \u00e0 double panneton : reconna\u00eetre la cl\u00e9 et le m\u00e9canisme\",\"datePublished\":\"2026-04-09T07:14:40+00:00\",\"dateModified\":\"2026-10-11T09:24:23+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.multisecu.fr\\\/produits-de-serrurerie\\\/serrure-a-double-panneton-mecanisme-histoire-et-securite\\\/\"},\"wordCount\":718,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.multisecu.fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.multisecu.fr\\\/produits-de-serrurerie\\\/serrure-a-double-panneton-mecanisme-histoire-et-securite\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.multisecu.fr\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/mottura-serie-50-double-panneton.jpg\",\"articleSection\":[\"Petit Glossaire de Serrurerie\",\"Produits de serrurerie\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.multisecu.fr\\\/produits-de-serrurerie\\\/serrure-a-double-panneton-mecanisme-histoire-et-securite\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.multisecu.fr\\\/produits-de-serrurerie\\\/serrure-a-double-panneton-mecanisme-histoire-et-securite\\\/\",\"url\":\"https:\\\/\\\/www.multisecu.fr\\\/produits-de-serrurerie\\\/serrure-a-double-panneton-mecanisme-histoire-et-securite\\\/\",\"name\":\"Serrure \u00e0 double panneton : reconna\u00eetre la cl\u00e9 et le m\u00e9canisme - 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