{"id":29275,"date":"2026-10-07T11:49:35","date_gmt":"2026-10-07T09:49:35","guid":{"rendered":"https:\/\/csci3d.fr\/?p=29275"},"modified":"2026-10-07T12:07:02","modified_gmt":"2026-10-07T10:07:02","slug":"velo-ancien-et-impression-3d-redonner-vie-aux-pieces-introuvables","status":"publish","type":"post","link":"https:\/\/csci3d.fr\/en\/velo-ancien-et-impression-3d-redonner-vie-aux-pieces-introuvables\/","title":{"rendered":"V\u00e9lo ancien et impression 3D : redonner vie aux pi\u00e8ces introuvables"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Vous avez un vieux Peugeot, un Mercier ou un Motob\u00e9cane dans le garage ? Vous connaissez sans doute ce moment : tout est en place, le cadre est beau, la transmission fonctionne\u2026 sauf cette petite pi\u00e8ce qui est us\u00e9e, cass\u00e9e ou tout simplement introuvable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les marques ont disparu ou chang\u00e9 de catalogue, les stocks neufs sont \u00e9puis\u00e9s, et les pi\u00e8ces d&rsquo;occasion sont ch\u00e8res ou en mauvais \u00e9tat. Les petites pi\u00e8ces, souvent en plastique, sont les premi\u00e8res \u00e0 l\u00e2cher avec les ann\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C&rsquo;est l\u00e0 que l&rsquo;impression 3D devient int\u00e9ressante pour la restauration. Pas pour remplacer l&rsquo;acier ou l&rsquo;alu des pi\u00e8ces nobles, mais pour refaire ces pi\u00e8ces secondaires, ces outils et ces accessoires qu&rsquo;on ne trouve plus ou qui n&rsquo;ont jamais exist\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Trois produits d\u00e9j\u00e0 disponibles<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Depuis quelque temps, je d\u00e9veloppe chez CSCI3D une petite gamme d\u00e9di\u00e9e aux v\u00e9los anciens.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Des galets de d\u00e9railleur pour Simplex et Sachs-Huret<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les galets (ou \u00ab roulettes \u00bb) de d\u00e9railleur s&rsquo;usent, se fendent, et se trouvent mal. J&rsquo;en propose deux mod\u00e8les, vendus par paire et imprim\u00e9s en nylon noir, une mati\u00e8re r\u00e9sistante \u00e0 l&rsquo;usure et au frottement de la cha\u00eene :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>le <a href=\"https:\/\/csci3d.fr\/en\/product\/galet-derailleur-simplex-10-dents\/\">galet de d\u00e9railleur Simplex 10 dents<\/a> (al\u00e9sage 11&nbsp;mm, \u00e9paisseur 9&nbsp;mm) ;<\/li>\n\n\n\n<li>le <a href=\"https:\/\/csci3d.fr\/en\/product\/galet-derailleur-sachs-huret-10-dents\/\">galet de d\u00e9railleur Sachs-Huret 10 dents<\/a> (al\u00e9sage 10&nbsp;mm, \u00e9paisseur 9&nbsp;mm).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ils conviennent aux v\u00e9los de type Peugeot, Mercier, Gitane, Motob\u00e9cane et bien d&rsquo;autres.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-rotated.jpg\"><img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-768x1024.jpg\" alt=\"\" class=\"wp-image-28316\" srcset=\"https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-768x1024.jpg 768w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-225x300.jpg 225w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-1152x1536.jpg 1152w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-9x12.jpg 9w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-700x933.jpg 700w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/06\/Pignon-derailleur-derailleur-sachs-huret-rotated.jpg 1200w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a><\/figure>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Un outil de positionnement de patins de frein Mafac<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">R\u00e9gler des patins sur un frein \u00e0 tirage central demande de la patience : il faut les placer \u00e0 la bonne hauteur, \u00e0 la bonne distance de la jante, et de fa\u00e7on sym\u00e9trique. <a href=\"https:\/\/csci3d.fr\/en\/product\/outil-positionnement-patin-frein-mafac\/\">Mon outil de positionnement<\/a> s&rsquo;ins\u00e8re entre la jante et les patins, et une petite presse \u00e0 vis permet de les serrer en position. Les patins se retrouvent \u00e0 1&nbsp;mm de la jante, en l\u00e9ger V, pour un freinage optimal.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il s&rsquo;adapte aux jantes de 18 \u00e0 23\u00a0mm de large gr\u00e2ce aux cales fournies. Il est imprim\u00e9 en PETG bleu avec de la visserie inox, et convient aux Mafac Racer, Raid, Comp\u00e9tition, Gold, Top 63, etc. Il est vendu seul, en presse seule, ou en pack des deux outils. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d.jpg\"><img decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d-768x1024.jpg\" alt=\"\" class=\"wp-image-29262\" style=\"width:768px;height:auto\" srcset=\"https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d-768x1025.jpg 768w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d-225x300.jpg 225w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d-1151x1536.jpg 1151w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d-9x12.jpg 9w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d-700x934.jpg 700w, https:\/\/csci3d.fr\/wp-content\/uploads\/2026\/08\/Montage-outil-positionnement-frein-mafac-Csci3d.jpg 1200w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a><\/figure>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi l&rsquo;impression 3D fonctionne bien pour le v\u00e9lo ancien<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Les petites s\u00e9ries sont possibles.<\/strong> Une pi\u00e8ce dont il y a besoin de dix exemplaires par an n&rsquo;int\u00e9resse aucun industriel. Pour l&rsquo;impression 3D, c&rsquo;est un cas normal.<\/li>\n\n\n\n<li><strong>Le choix de la mati\u00e8re est adapt\u00e9 \u00e0 l&rsquo;usage.<\/strong> Nylon pour les pi\u00e8ces qui frottent, des filament charg\u00e9 de fibre de carbone pour des pi\u00e8ces r\u00e9sistantes ou du PETG qui peut servir pour des pi\u00e8ces ayant moins de contraintes par exemple.<\/li>\n\n\n\n<li><strong>On peut s&rsquo;adapter \u00e0 la pi\u00e8ce d&rsquo;origine.<\/strong> Une cote \u00e0 reprendre, un al\u00e9sage diff\u00e9rent, une variante : tout se r\u00e8gle dans le dessin 3d du fichier.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Et vous, que vous manque-t-il ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ces trois produits sont n\u00e9s de besoins que j&rsquo;ai rencontr\u00e9s. Mais chaque v\u00e9lo ancien a ses particularit\u00e9s, et je suis certain que vous en connaissez d&rsquo;autres.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quelques pistes, pour vous donner des id\u00e9es : une pi\u00e8ce plastique cass\u00e9e sur un d\u00e9railleur, un cache ou un embout disparu, une bague ou une entretoise, un outil de r\u00e9glage sp\u00e9cifique, un support ou une fixation d&rsquo;accessoire d&rsquo;\u00e9poque\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Si vous cherchez une pi\u00e8ce ou un outil que vous ne trouvez plus, \u00e9crivez moi.<\/strong> Dites moi pour quel v\u00e9lo et quel composant, et si possible joignez une photo avec les dimensions principales (ou la pi\u00e8ce d&rsquo;origine, m\u00eame ab\u00eem\u00e9e). Je vous dirai si c&rsquo;est r\u00e9alisable en impression 3D, avec quelle mati\u00e8re et pour quel prix. Si la pi\u00e8ce int\u00e9resse d&rsquo;autres passionn\u00e9s, elle pourra rejoindre la boutique. Avant de r\u00e9aliser cette pi\u00e8ce il faudra passer par un dessin 3d obligatoirement. Il faudra id\u00e9alement me fournir une pi\u00e8ce \u00e0 copier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 <a href=\"https:\/\/csci3d.fr\/en\/contact\/\">Me contacter via le formulaire<\/a> ou par e-mail : <a href=\"mailto:contact@csci3d.fr\">contact@csci3d.fr<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Et si vous avez d\u00e9j\u00e0 essay\u00e9 de refaire une pi\u00e8ce de votre c\u00f4t\u00e9, ou si vous avez des astuces de restauration \u00e0 partager, les commentaires sont ouverts.<\/p>","protected":false},"excerpt":{"rendered":"<p>Vous avez un vieux Peugeot, un Mercier ou un Motob\u00e9cane dans le garage ? Vous connaissez sans doute ce moment : tout est en place, le cadre est beau, la transmission fonctionne\u2026 sauf cette petite pi\u00e8ce qui est us\u00e9e, cass\u00e9e ou tout simplement introuvable. Les marques ont disparu ou chang\u00e9 de catalogue, les stocks neufs [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":29262,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[137],"tags":[],"class_list":["post-29275","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-accessoire-velo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>V\u00e9lo ancien et impression 3D : redonner vie aux pi\u00e8ces introuvables - CSCI3D<\/title>\n<meta name=\"description\" content=\"Galets de d\u00e9railleur, outil de r\u00e9glage de patins Mafac\u2026 CSCI3D imprime en 3D des pi\u00e8ces pour v\u00e9los anciens. 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