{"id":843,"date":"2026-10-11T01:51:49","date_gmt":"2026-10-11T01:51:49","guid":{"rendered":"https:\/\/aft-forge.jk-ideaweb.com\/?post_type=product&#038;p=843"},"modified":"2026-10-19T12:03:12","modified_gmt":"2026-10-19T12:03:12","slug":"seat-post","status":"publish","type":"product","link":"https:\/\/aft-forge.com\/ja\/product\/seat-post\/","title":{"rendered":"\u30b7\u30fc\u30c8\u30dd\u30b9\u30c8"},"content":{"rendered":"<h2 style=\"text-align: left;\">Forged Aluminum Bicycle Seat Post: Shaft and Saddle Clamp Head in One Piece<\/h2>\n<p style=\"text-align: left;\">The forged aluminum bicycle seat post connects the saddle to the frame. It is a long slender tube with a bent saddle clamp head at the top for mounting the saddle rail clamp. A one-piece seat post forms the shaft and clamp head together, with no welded or bolted-on head, giving a simple, light structure.<\/p>\n<p style=\"text-align: left;\">The bent clamp head carries the bending load from the rider&#8217;s weight and is the most heavily stressed area of the post. Al Forge Tech (AFT) forges the head so grain flow turns continuously from shaft into head, avoiding the heat-affected weakening of a welded head. After heat treatment, the clamp bore, threads and shaft diameter are machined, and anodizing or shot blasting can be applied for appearance and corrosion resistance.<\/p>\n<h3 style=\"text-align: left;\">\u4e3b\u306a\u6a5f\u80fd<\/h3>\n<ul style=\"text-align: left;\">\n<li>Shaft and saddle clamp head formed in one piece, no weld<\/li>\n<li>Continuous grain flow through the bent head under bending load<\/li>\n<li>Clamp bore, threads and shaft diameter machined<\/li>\n<li>Anodized or shot-blasted finish<\/li>\n<\/ul>\n<h2 style=\"text-align: left;\">Forged Aluminum Bicycle Seat Post Specifications and Manufacturing Capability<\/h2>\n<div class=\"table-container\" style=\"text-align: left;\">\n<table class=\"table table-bordered table-striped\">\n<thead>\n<tr>\n<th>\u5546\u54c1<\/th>\n<th>\u8a73\u7d30<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u88fd\u54c1\u30ab\u30c6\u30b4\u30ea\u30fc<\/td>\n<td>Aluminum Forging Bicycle Parts<\/td>\n<\/tr>\n<tr>\n<td>\u7533\u8acb<\/td>\n<td>Seat posts for bicycles and e-bikes<\/td>\n<\/tr>\n<tr>\n<td>\u4e3b\u306a\u30d7\u30ed\u30bb\u30b9<\/td>\n<td>\u9589\u578b\u71b1\u9593\u935b\u9020\uff08\u71b1\u9593\u935b\u9020\u30d7\u30ec\u30b9\uff1a600T\uff5e8,000T\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u7d20\u6750<\/td>\n<td>\u304a\u5ba2\u69d8\u306e\u4ed5\u69d8\u306b\u5408\u308f\u305b\u3066\u9078\u629e\u53ef\u80fd\u30022xxx\u30015xxx\u30016xxx\u30017xxx \u30b7\u30ea\u30fc\u30ba\u306e\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u5408\u91d1\uff08\u4f8b\uff1a2014\u30016061\u30016082\u30017075\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u71b1\u51e6\u7406<\/td>\n<td>\u5408\u91d1\u304a\u3088\u3073\u5f37\u5ea6\u8981\u4ef6\u306b\u3088\u308b\u793e\u5185T4\u51e6\u7406\uff088\u30e6\u30cb\u30c3\u30c8\uff09\u304a\u3088\u3073T6\u4eba\u5de5\u8001\u5316\uff087\u30e6\u30cb\u30c3\u30c8\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u4e8c\u6b21\u52a0\u5de5<\/td>\n<td>CNC\u52a0\u5de5\uff0852\u53f0\u306e\u52a0\u5de5\u30bb\u30f3\u30bf\u30fc\u300130\u53f0\u306e\u65cb\u76e4\uff09\u3001\u30d0\u30ea\u53d6\u308a\u3001\u632f\u52d5\u4ed5\u4e0a\u3052<\/td>\n<\/tr>\n<tr>\n<td>\u8868\u9762\u4ed5\u4e0a\u3052<\/td>\n<td>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u967d\u6975\u9178\u5316\uff08\u786c\u967d\u6975\u9178\u5316\u3092\u542b\u3080\uff09\u3001\u30b7\u30e7\u30c3\u30c8\u30d6\u30e9\u30b9\u30c8\u3001\u96fb\u5b50\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u307e\u305f\u306f\u5857\u88c5<\/td>\n<\/tr>\n<tr>\n<td>\u691c\u67fb<\/td>\n<td>\u30b6\u30a4\u30c4CMM\uff084\u53f0\uff09\u3001\u786c\u5ea6\u8a08\u3001\u5206\u5149\u8a08\u3001\u86cd\u5149\u900f\u904e\u691c\u67fb\u30e9\u30a4\u30f3<\/td>\n<\/tr>\n<tr>\n<td>\u5bf8\u6cd5\u3068\u516c\u5dee<\/td>\n<td>\u9867\u5ba2\u3054\u3068\u306b2D\/3D\u56f3\u9762<\/td>\n<\/tr>\n<tr>\n<td>\u54c1\u8cea\u30b7\u30b9\u30c6\u30e0<\/td>\n<td>IATF 16949:2016\u3001ISO 14001:2015<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"text-align: left;\">Forged Aluminum Bicycle Seat Post Manufacturing Process<\/h2>\n<ol style=\"text-align: left;\">\n<li><strong>\u30c9\u30ed\u30fc\u30a4\u30f3\u30b0\u30ec\u30d3\u30e5\u30fc\u3068DFM<\/strong>\u5408\u91d1\u3001\u8377\u91cd\u65b9\u5411\u3001\u91cd\u8981\u306a\u5bf8\u6cd5\u3092\u78ba\u8a8d\u3057\u3001\u305d\u306e\u5f8c QForm \u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3057\u3066\u91d1\u5c5e\u6d41\u52d5\u3068\u6b20\u9665\u30ea\u30b9\u30af\u3092\u4e88\u6e2c\u3057\u307e\u3059\u3002.<\/li>\n<li><strong>\u30c7\u30b6\u30a4\u30f3\u3068\u88fd\u9020<\/strong>\u30c0\u30a4\u30bb\u30c3\u30c8\u306e\u6570\uff08\u4f8b\u3048\u3070\u3001\u30d6\u30ed\u30c3\u30ab\u30fc\u30c0\u30a4\u3068\u30d5\u30a1\u30a4\u30cb\u30c3\u30b7\u30e3\u30fc\u30c0\u30a4\uff09\u306f\u90e8\u54c1\u306e\u8907\u96d1\u3055\u306b\u5408\u308f\u305b\u3066\u8a08\u753b\u3055\u308c\u3066\u304a\u308a\u3001\u30c0\u30a4\u306e\u5f62\u72b6\u306f\u643a\u5e2f\u578b3D\u30b9\u30ad\u30e3\u30ca\u30fc\u3067\u78ba\u8a8d\u3055\u308c\u307e\u3059\u3002.<\/li>\n<li><strong><a href=\"https:\/\/aft-forge.com\/ja\/msg\/what-is-hot-forging.html\/\">\u71b1\u9593\u935b\u9020<\/a><\/strong>600T\uff5e8,000T\u306e\u71b1\u9593\u935b\u9020\u30d7\u30ec\u30b9\u3067\u306e\u9589\u578b\u6210\u5f62\u306b\u3088\u308a\u3001\u90e8\u54c1\u306e\u5f62\u72b6\u306b\u6cbf\u3063\u305f\u9023\u7d9a\u3057\u305f\u7c92\u72b6\u6d41\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002.<\/li>\n<li><strong>\u71b1\u51e6\u7406<\/strong>T4\u6eb6\u6db2\u51e6\u7406\u3068T6\u4eba\u5de5\u8001\u5316\u306f\u793e\u5185\u3067\u5b9f\u65bd\u3055\u308c\u3001\u5408\u91d1\u304a\u3088\u3073\u5f37\u5ea6\u8981\u4ef6\u306b\u3088\u3063\u3066\u8a2d\u5b9a\u3055\u308c\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002.<\/li>\n<li><strong><a href=\"https:\/\/aft-forge.com\/ja\/msg\/aluminum-cnc-machining-services.html\/\">CNC\u52a0\u5de5<\/a> \u305d\u3057\u3066\u4ed5\u4e0a\u3052<\/strong>\u7a74\u3001\u30b9\u30ec\u30c3\u30c9\u3001\u63a5\u5408\u9762\u306f\u6a5f\u68b0\u52a0\u5de5\u3055\u308c\u3001\u305d\u306e\u5f8c\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30d0\u30ea\u53d6\u308a\u3001\u632f\u52d5\u4ed5\u4e0a\u3052\u3001\u30b7\u30e7\u30c3\u30c8\u30d6\u30e9\u30b9\u30c8\u3001\u307e\u305f\u306f\u967d\u6975\u9178\u5316\u304c\u884c\u308f\u308c\u307e\u3059\u3002.<\/li>\n<li><strong>\u691c\u67fb\u3068\u767a\u9001<\/strong>\u5bf8\u6cd5\u3001\u786c\u5ea6\u3001\u5316\u5b66\u7d44\u6210\u306fCMM\u3001\u786c\u5ea6\u8a08\u3001\u5206\u5149\u8a08\u3092\u7528\u3044\u3066\u78ba\u8a8d\u3055\u308c\u3001\u30ed\u30c3\u30c8\u306e\u30c8\u30ec\u30fc\u30b5\u30d3\u30ea\u30c6\u30a3\u306fIATF 16949\u306b\u5f93\u3063\u3066\u7ba1\u7406\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/li>\n<\/ol>\n<div id=\"prodNav\">\n<div class=\"tab-content responsive\">\n<div id=\"contentprod0\" class=\"tab-pane active txtNormal\">\n<h2 style=\"text-align: left;\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<h3 style=\"text-align: left;\">How does a one-piece seat post differ from one with a welded head?<\/h3>\n<p style=\"text-align: left;\">A welded-head post has the clamp head welded to the shaft, and the weld and heat-affected zone are usually weaker than the base metal, right where bending load is highest. A one-piece post is formed from a single piece of material with continuous grain flow through the bend and no weld, giving a simpler structure and eliminating welding and straightening steps.<\/p>\n<h3 style=\"text-align: left;\">Can the seat post diameter be customized to the frame?<\/h3>\n<p style=\"text-align: left;\">Yes. Diameter, length, clamp head angle and setback can all be developed to the brand&#8217;s drawing. AFT evaluates the forming method by shaft length and wall thickness, finish-machines the diameter after heat treatment and checks diameter tolerance and straightness with CMM and gauges to ensure the fit with the frame&#8217;s seat tube.<\/p>\n<h3 style=\"text-align: left;\">How does a forged aluminum Forged Aluminum Bicycle Seat Post compare with casting or machining from billet?<\/h3>\n<p style=\"text-align: left;\">Forging shapes aluminum in the solid state under pressure, so the grain flow follows the part contour and the porosity and shrinkage common in castings are avoided. Compared with machining from solid billet, a near-net-shape forging removes less material and shortens machining time. For a Forged Aluminum Bicycle Seat Post under repeated loads, forging balances strength and weight; the final choice still depends on design loads and volume.<\/p>\n<h3 style=\"text-align: left;\">How do you keep the Forged Aluminum Bicycle Seat Post consistent from lot to lot?<\/h3>\n<p style=\"text-align: left;\">Al Forge Tech runs incoming (IQC), in-process (IPQC) and final (FQC) inspection under IATF 16949:2016, supported by 4 Zeiss CMMs, hardness testers, a spectrometer and a fluorescent penetrant inspection line. First, middle and last pieces of every lot are checked against the die; when wear causes dimensional drift, the die is reworked to keep the Forged Aluminum Bicycle Seat Post stable across lots.<\/p>\n<h3 style=\"text-align: left;\">Can you assess forging feasibility while the Forged Aluminum Bicycle Seat Post is still in design?<\/h3>\n<p style=\"text-align: left;\">\u306f\u3044\u3002Al Forge Tech\u306f\u4e3b\u306bOEM\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u3068\u3057\u3066\u6d3b\u52d5\u3057\u3066\u304a\u308a\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u306f\u30b3\u30f3\u30bb\u30d7\u30c8\u307e\u305f\u306f\u56f3\u9762\u6bb5\u968e\u3067\u8a2d\u8a08\u9069\u5408\u6027\u8a55\u4fa1(DFM)\u306e\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u8584\u3044\u808b\u9aa8\u306e\u8abf\u6574\u3001\u6025\u306a\u65ad\u9762\u5909\u66f4\u3001\u304a\u3088\u3073\u30e9\u30c3\u30d7\u3084\u30a2\u30f3\u30c0\u30fc\u30d5\u30a3\u30eb\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u8a2d\u8a08\u3055\u308c\u305f\u89d2\u5ea6\u306e\u8abf\u6574\u306a\u3069\u304c\u542b\u307e\u308c\u307e\u3059\u3002QForm\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306f\u91d1\u5c5e\u6d41\u52d5\u3092\u65e9\u671f\u306b\u4e88\u6e2c\u3057\u3001\u305d\u306e\u7d50\u679c\u306f\u5f53\u793e\u306b\u3088\u308b\u91d1\u578b\u8a2d\u8a08\u7d4c\u9a13\u3068\u6bd4\u8f03\u3055\u308c\u307e\u3059\u3002.<\/p>\n<h2 style=\"text-align: left;\">Request a Quote for the Forged Aluminum Bicycle Seat Post<\/h2>\n<p style=\"text-align: left;\">Developing a new Forged Aluminum Bicycle Seat Post or converting an existing part to aluminum forging? Send us your 3D\/2D drawings, alloy and temper, annual volume and finishing requirements. Our engineering team will reply with a feasibility review, die plan and quotation.<\/p>\n<ul style=\"text-align: left;\">\n<li>\u30aa\u30f3\u30e9\u30a4\u30f3\u306e\u304a\u554f\u3044\u5408\u308f\u305b\uff1a <a href=\"https:\/\/aft-forge.com\/ja\/contact-us\/\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a><\/li>\n<li>\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9: <a href=\"mailto:aft@aft-forge.com.tw\">aft@aft-forge.com.tw<\/a><\/li>\n<\/ul>\n<p style=\"text-align: left;\">\u985e\u4f3c\u306e\u30d1\u30fc\u30c4\u3092\u6bd4\u8f03\u3059\u308b\u306b\u306f\u3001\u95b2\u89a7\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/aft-forge.com\/ja\/bicycle-parts-bike-parts\/\">Aluminum Forging Bicycle Parts<\/a>\u00a0\u305d\u3057\u3066\u79c1\u305f\u3061\u306e <a href=\"https:\/\/aft-forge.com\/ja\/category\/applications\/\">\u81ea\u52d5\u8eca\u7528\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u935b\u9020\u7528\u9014<\/a>, \u307e\u305f\u306f\u3001\u3053\u3061\u3089\u3092\u3054\u89a7\u304f\u3060\u3055\u3044 <a href=\"https:\/\/aft-forge.com\/ja\/about-us\/\">\u4f1a\u793e\u7d39\u4ecb<\/a> \u5f53\u793e\u306e\u8a2d\u5099\u304a\u3088\u3073\u8a8d\u8a3c\u306b\u3064\u3044\u3066\u3002.<\/p>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Forged Aluminum Bicycle Seat Post: Shaft and Saddle Clamp Head in One Piece The forged aluminum bicycle seat post connects the saddle to the frame. It is a long slender tube with a bent saddle clamp head at the top for mounting the saddle rail clamp. A one-piece seat post forms the shaft and clamp head together, with no welded or bolted-on head, giving a simple, light structure. The bent clamp head carries the bending load from the rider&#8217;s weight and is the most heavily stressed area of the post. Al Forge Tech (AFT) forges the head so grain flow turns continuously from shaft into head, avoiding the heat-affected weakening [&hellip;]<\/p>\n","protected":false},"featured_media":844,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[24],"product_tag":[],"class_list":["post-843","product","type-product","status-publish","has-post-thumbnail","product_cat-bicycle-parts-bike-parts","first","instock","taxable","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/product\/843","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/comments?post=843"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/media\/844"}],"wp:attachment":[{"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/media?parent=843"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/product_brand?post=843"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/product_cat?post=843"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/aft-forge.com\/ja\/wp-json\/wp\/v2\/product_tag?post=843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}