{"id":2053,"date":"2021-01-20T15:32:21","date_gmt":"2021-01-20T14:32:21","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=2053"},"modified":"2025-09-29T23:23:35","modified_gmt":"2025-09-29T21:23:35","slug":"galets-cylindriques-zb-extremites-logarithmiques","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/fr\/produits\/rouleaux-et-aiguilles\/galets-cylindriques-zb-extremites-logarithmiques\/","title":{"rendered":"Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Cylindrical_roller_bearing?utm_source=chatgpt.com\">Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques \u2013 Galets \u00e0 faible contrainte de bord pour roulements tol\u00e9rants aux d\u00e9salignements<\/a><\/h2>\n<p>Les Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques sont des galets droits con\u00e7us pour r\u00e9duire les contraintes de bord et am\u00e9liorer la r\u00e9partition des charges en cas de l\u00e9ger d\u00e9salignement. Ils offrent une forte capacit\u00e9 radiale, un faible frottement et des performances stables dans les roulements \u00e0 rouleaux cylindriques et ensembles sur mesure pour des transmissions et syst\u00e8mes de mouvement exigeants.<\/p>\n<h3>\ud83d\udd27 Caract\u00e9ristiques techniques cl\u00e9s<\/h3>\n<ul>\n<li><strong>G\u00e9om\u00e9trie des extr\u00e9mit\u00e9s<\/strong> : ZB = profil logarithmique des deux c\u00f4t\u00e9s afin de minimiser les charges de bord par rapport aux faces plates ou purement cylindriques.<\/li>\n<li><strong>Normes<\/strong> : Dimensions et pr\u00e9cision selon <em>DIN 5402-1<\/em> (galets cylindriques).<\/li>\n<li><strong>Mat\u00e9riaux<\/strong> : Acier \u00e0 roulement 100Cr6 \/ AISI 52100 (1.3505) en standard ; options inox (AISI 420C\/440C) sur demande.<\/li>\n<li><strong>Duret\u00e9 (AISI 52100)<\/strong> : ~60\u201366 HRC apr\u00e8s traitement thermique pour r\u00e9sistance \u00e0 l\u2019usure et stabilit\u00e9.<\/li>\n<li><strong>Surface<\/strong> : OD rectifi\u00e9 de pr\u00e9cision &amp; superfinition ; extr\u00e9mit\u00e9s rectifi\u00e9es selon un contour logarithmique pour un contact optimis\u00e9.<\/li>\n<li><strong>Dimensions typiques<\/strong> : Diam\u00e8tre \u2248 2,0\u201370,0 mm ; Longueur \u2248 4,0\u2013100,0 mm (tailles sp\u00e9ciales selon plan).<\/li>\n<li><strong>Tol\u00e9rances<\/strong> : Tri au micron du diam\u00e8tre\/longueur ; classes de pr\u00e9cision selon DIN 5402-1.<\/li>\n<\/ul>\n<h3>\u2705 Avantages<\/h3>\n<ul>\n<li><strong>Forte capacit\u00e9 radiale<\/strong> avec contraintes de bord r\u00e9duites en cas de d\u00e9salignement.<\/li>\n<li><strong>Moins de frottement &amp; de temp\u00e9rature<\/strong> aux contacts d\u2019extr\u00e9mit\u00e9 gr\u00e2ce au profil logarithmique optimis\u00e9.<\/li>\n<li><strong>Dur\u00e9e de vie accrue<\/strong> par une r\u00e9partition plus homog\u00e8ne des charges et moins de fatigue de contact.<\/li>\n<li><strong>Faux-rond constant<\/strong> via une finition OD de pr\u00e9cision et un tri serr\u00e9.<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Applications typiques des Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques<\/h3>\n<ul>\n<li><strong>Roulements cylindriques<\/strong> (NU, NJ, NUP) pour r\u00e9ducteurs, entra\u00eenements industriels et transmissions lourdes.<\/li>\n<li><strong>Moteurs, pompes, compresseurs<\/strong> sujets \u00e0 un l\u00e9ger d\u00e9salignement ou \u00e0 une flexion d\u2019arbre.<\/li>\n<li><strong>Machines-outils &amp; platines de pr\u00e9cision<\/strong> n\u00e9cessitant un guidage axial stable avec contraintes de bord minimis\u00e9es.<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Grades &amp; dimensions disponibles<\/h3>\n<ul>\n<li><strong>Classes de pr\u00e9cision<\/strong> : <a href=\"https:\/\/www.redhillballs.com\/company\/precision-grades\/\">Selon DIN 5402-1<\/a> ; jeux appari\u00e9s et s\u00e9lections sp\u00e9ciales disponibles.<\/li>\n<li><strong>Plage de diam\u00e8tres<\/strong> : ~2,0\u201370,0 mm ; <strong>Longueur<\/strong> : ~4,0\u2013100,0 mm.<\/li>\n<li><strong>Types associ\u00e9s<\/strong> : <strong>ZB<\/strong> = profil d\u2019extr\u00e9mit\u00e9 logarithmique<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-328\" src=\"\/wp-content\/uploads\/2021\/01\/cylindrical-roller-zb-logarithmic-ends.jpg\" alt=\"\" width=\"400\" height=\"252\" srcset=\"https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/cylindrical-roller-zb-logarithmic-ends.jpg 400w, https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/cylindrical-roller-zb-logarithmic-ends-300x189.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques \u2013 Galets \u00e0 faible contrainte de bord pour roulements tol\u00e9rants aux d\u00e9salignements Les Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques sont des galets droits con\u00e7us pour r\u00e9duire les contraintes de bord et am\u00e9liorer la r\u00e9partition des charges en cas de l\u00e9ger d\u00e9salignement. Ils offrent une forte capacit\u00e9 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9000,"parent":2043,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2053","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques \u2013 Fiabilit\u00e9<\/title>\n<meta name=\"description\" content=\"Galets cylindriques \u00ab ZB \u00bb extr\u00e9mit\u00e9s logarithmiques : robustes, pr\u00e9cis et durables, con\u00e7us pour roulements soumis \u00e0 fortes charges\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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