{"id":833,"date":"2026-10-11T01:48:45","date_gmt":"2026-10-11T01:48:45","guid":{"rendered":"https:\/\/aft-forge.jk-ideaweb.com\/?post_type=product&#038;p=833"},"modified":"2026-10-19T11:36:41","modified_gmt":"2026-10-19T11:36:41","slug":"spider","status":"publish","type":"product","link":"https:\/\/aft-forge.com\/zh\/product\/spider\/","title":{"rendered":"Spider"},"content":{"rendered":"<div id=\"prodNav\">\n<div class=\"tab-content responsive\" style=\"text-align: left;\">\n<div id=\"contentprod0\" class=\"tab-pane active txtNormal\">\n<h2>Forged Aluminum Bicycle Spider (Stepped): Five-Arm Chainring Carrier with Offset<\/h2>\n<p>The stepped forged aluminum bicycle spider is also a five-arm chainring carrier, but its hub is a deeper cup, the five arms step outward from the cup rim with a height change, and one arm carries an extra extended lug. The three-dimensional form creates an offset between the chainring mounting face and the hub to match the chainline of the crank and frame.<\/p>\n<p>The deep cup and stepped arms make metal flow paths longer and more complex during forging. Al Forge Tech (AFT) plans billet and dies with QForm simulation and hot forges the cup and arms so grain flow turns from the cup wall into each arm. After heat treatment, the center bore, bolt holes and lug features are CNC-machined, and BCD, offset and flatness are verified on CMM.<\/p>\n<h3>\u4e3b\u8981\u529f\u80fd<\/h3>\n<ul>\n<li>Deep cup hub and stepped five arms forged in one piece<\/li>\n<li>3D form provides chainring offset to match chainline<\/li>\n<li>Extended lug machinable as an extra mounting point<\/li>\n<li>BCD, offset and flatness measured on CMM<\/li>\n<\/ul>\n<h2>Forged Aluminum Bicycle Spider (Stepped) Specifications and Manufacturing Capability<\/h2>\n<div class=\"table-container\">\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>\u7522\u54c1\u985e\u5225<\/td>\n<td>Aluminum Forging Bicycle Parts<\/td>\n<\/tr>\n<tr>\n<td>\u7533\u8acb<\/td>\n<td>Chainring carriers for cranksets requiring a specific chainline offset<\/td>\n<\/tr>\n<tr>\n<td>\u4e3b\u8981\u904e\u7a0b<\/td>\n<td>\u9589\u5f0f\u71b1\u935b\u9020\uff08\u71b1\u935b\u9020\u58d3\u6a5f 600T\u20138,000T\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u6750\u8cea<\/td>\n<td>Selected to customer specification; 2xxx, 5xxx, 6xxx and 7xxx series aluminum alloys available (e.g. 2014, 6061, 6082, 7075)<\/td>\n<\/tr>\n<tr>\n<td>\u71b1\u8655\u7406<\/td>\n<td>\u6839\u64da\u5408\u91d1\u8207\u5f37\u5ea6\u8981\u6c42\u800c\u63d0\u4f9b\u7684\u5167\u90e8 T4 \u8655\u7406\u65b9\u6848\uff088 \u5957\uff09\u53ca T6 \u4eba\u5de5\u8001\u5316\u8655\u7406\u65b9\u6848\uff087 \u5957\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u4e8c\u6b21\u52a0\u5de5<\/td>\n<td>CNC \u52a0\u5de5\uff0852 \u53f0\u52a0\u5de5\u4e2d\u5fc3\u300130 \u53f0\u9291\u5e8a\uff09\u3001\u9291\u524a\u3001\u632f\u52d5\u78e8\u524a<\/td>\n<\/tr>\n<tr>\n<td>\u8868\u9762\u8655\u7406<\/td>\n<td>\u6309\u8981\u6c42\u9032\u884c\u967d\u6975\u6c27\u5316\uff08\u5305\u62ec\u786c\u967d\u6975\u6c27\u5316\uff09\u3001\u5674\u5c04\u7c89\u788e\u3001\u96fb\u5b50\u5857\u5c64\u6216\u5857\u6f06\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u6aa2\u67e5<\/td>\n<td>Zeiss CMM (4 units), hardness testers, spectrometer, fluorescent penetrant inspection line<\/td>\n<\/tr>\n<tr>\n<td>\u5c3a\u5bf8\u8207\u516c\u5dee<\/td>\n<td>\u6309\u5ba2\u6236\u63d0\u4f9b2D\/3D\u5716\u7d19<\/td>\n<\/tr>\n<tr>\n<td>\u54c1\u8cea\u7ba1\u7406\u7cfb\u7d71<\/td>\n<td>IATF 16949:2016\u3001ISO 14001:2015<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Forged Aluminum Bicycle Spider (Stepped) Manufacturing Process<\/h2>\n<ol>\n<li><strong>\u7e6a\u5716\u8a55\u4f30\u8207 DFM<\/strong>\u6211\u5011\u78ba\u8a8d\u5408\u91d1\u3001\u8f09\u8377\u65b9\u5411\u548c\u95dc\u9375\u5c3a\u5bf8\uff0c\u7136\u5f8c\u57f7\u884c QForm \u6a21\u64ec\uff0c\u4ee5\u9810\u6e2c\u91d1\u5c6c\u6d41\u52d5\u548c\u7f3a\u9677\u98a8\u96aa\u3002.<\/li>\n<li><strong>\u8a2d\u8a08\u8207\u88fd\u9020<\/strong>\u9291\u5200\u7d44\u6578\uff08\u4f8b\u5982\uff0c\u963b\u65b7\u5200\u548c\u5b8c\u6210\u5200\uff09\u8996\u96f6\u4ef6\u7684\u8907\u96dc\u7a0b\u5ea6\u800c\u5b9a\uff0c\u9291\u5200\u8f2a\u5ed3\u5247\u4f7f\u7528\u4fbf\u651c\u5f0f3D\u6383\u63cf\u5100\u9032\u884c\u6aa2\u67e5\u3002.<\/li>\n<li><strong><a href=\"https:\/\/aft-forge.com\/zh\/forging-service\/hot-forging-service\/\">\u71b1\u935b\u9020<\/a><\/strong>600T\u20138,000T \u71b1\u935b\u9020\u58d3 Presses \u7684\u9589\u5f0f\u6210\u5f62\u6280\u8853\u5275\u9020\u51fa\u6301\u7e8c\u7684\u6676\u7c92\u6d41\uff0c\u4e26\u9075\u5faa\u96f6\u4ef6\u7684\u8f2a\u5ed3\u3002.<\/li>\n<li><strong>\u71b1\u8655\u7406<\/strong>T4 \u6eb6\u6db2\u8655\u7406\u548c T6 \u4eba\u5de5\u8001\u5316\u8655\u7406\u5747\u5728\u5ee0\u5167\u9032\u884c\uff0c\u53c3\u6578\u7531\u5408\u91d1\u548c\u5f37\u5ea6\u8981\u6c42\u8a2d\u5b9a\u3002.<\/li>\n<li><strong><a href=\"https:\/\/aft-forge.com\/zh\/forging-service\/aluminum-cnc-machining-services\/\">CNC\u52a0\u5de5<\/a> \u4ee5\u53ca\u5b8c\u6210<\/strong>\u5b54\u3001\u87ba\u7d0b\u548c\u63a5\u5408\u9762\u5747\u7d93\u904e\u6a5f\u68b0\u52a0\u5de5\uff0c\u7136\u5f8c\u6839\u64da\u9700\u8981\u9032\u884c\u62cb\u5149\u3001\u632f\u52d5\u62cb\u5149\u3001\u5674\u4e38\u6216\u967d\u6975\u6c27\u5316\u8655\u7406\u3002.<\/li>\n<li><strong>\u6aa2\u67e5\u8207\u904b\u8f38<\/strong>\u5c3a\u5bf8\u3001\u786c\u5ea6\u53ca\u5316\u5b78\u6210\u5206\u5747\u901a\u904e CMM\u3001\u786c\u5ea6\u6e2c\u8a66\u5100\u53ca\u5206\u5149\u5149\u5ea6\u5100\u9032\u884c\u9a57\u8b49\uff0c\u4e14\u6240\u6709\u6279\u6b21\u7684\u7522\u54c1\u5747\u9075\u7167 IATF 16949 \u7684\u6a19\u6e96\u9032\u884c\u8ffd\u8e64\u3002.<\/li>\n<\/ol>\n<h2>\u5e38\u898b\u554f\u984c<\/h2>\n<h3>What is spider offset, and what does it affect?<\/h3>\n<p>Offset is the axial distance between the chainring mounting face and the hub or crank mounting face. It sets the chainring&#8217;s lateral position on the bike, that is, the chainline. An incorrect chainline increases chain angle across the cassette, affecting shifting and wear. The stepped spider forges the required offset directly, reducing the need for spacers or extra machining.<\/p>\n<h3>What needs attention when forging a stepped spider?<\/h3>\n<p>The deep cup and stepped arms force material to travel a longer path, risking laps at cup-wall corners or underfill at the arm tips. AFT simulates metal flow with QForm first, adjusts billet, preform and die design based on the results, and confirms complete form through first-, middle- and last-piece checks.<\/p>\n<h3>Can you assess forging feasibility while the Forged Aluminum Bicycle Spider (Stepped) is still in design?<\/h3>\n<p>\u662f\u7684\u3002Al Forge Tech \u4e3b\u8981\u4f5c\u70ba OEM \u4f9b\u61c9\u5546\u63d0\u4f9b\u670d\u52d9\uff0c\u6211\u5011\u7684\u5de5\u7a0b\u5e2b\u53ef\u4ee5\u5728\u69cb\u601d\u6216\u7e6a\u5716\u968e\u6bb5\u5c31\u8a2d\u8a08\u7684\u53ef\u751f\u7522\u6027\uff08DFM\uff09\u63d0\u4f9b\u610f\u898b\uff0c\u4f8b\u5982\u8abf\u6574\u8584\u908a\u7de3\u3001\u6025\u5207\u7684\u5207\u9762\u8b8a\u5316\u6216\u8a2d\u8a08\u89d2\u5ea6\uff0c\u4ee5\u907f\u514d\u6b98\u6599\u548c\u672a\u586b\u5145\u5340\u57df\u3002QForm \u6a21\u64ec\u80fd\u53ca\u65e9\u9810\u6e2c\u91d1\u5c6c\u6d41\u52d5\uff0c\u4e26\u8207\u6211\u5011\u5df2\u6709\u7684\u6a21\u5177\u8a2d\u8a08\u7d93\u9a57\u9032\u884c\u4ea4\u53c9\u6838\u5c0d\u3002.<\/p>\n<h3>Is heat treatment for the Forged Aluminum Bicycle Spider (Stepped) done in-house?<\/h3>\n<p>Yes. Al Forge Tech operates 8 T4 solution treatment units and 7 T6 artificial aging units on site, so the Forged Aluminum Bicycle Spider (Stepped) can be solution treated, quenched and aged in the same facility before machining and inspection. Keeping heat treatment in-house removes inter-plant transport, reduces lead-time risk and keeps lot traceability within one quality system. Parameters are set according to the alloy grade and your specification.<\/p>\n<h3>Can Al Forge Tech supply the Forged Aluminum Bicycle Spider (Stepped) from forging through machining?<\/h3>\n<p>Yes. Forging, heat treatment, CNC machining, surface finishing and inspection are integrated in one facility: 52 CNC machining centers (40 four-axis and 12 4.5-axis), 30 lathes (14 with robotic loading), plus broaching, burnishing and centerless grinding. The Forged Aluminum Bicycle Spider (Stepped) can be delivered as a forged blank, semi-finished or fully machined part.<\/p>\n<h2>Request a Quote for the Forged Aluminum Bicycle Spider (Stepped)<\/h2>\n<p>Developing a new Forged Aluminum Bicycle Spider (Stepped) 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>\n<li>\u7dda\u4e0a\u67e5\u8a62\uff1a <a href=\"https:\/\/aft-forge.com\/zh\/contact-us\/\">\u806f\u7d61\u6211\u5011<\/a><\/li>\n<li>\u96fb\u5b50\u90f5\u4ef6\uff1a <a href=\"mailto:aft@aft-forge.com.tw\">aft@aft-forge.com.tw<\/a><\/li>\n<\/ul>\n<p>\u82e5\u8981\u6bd4\u8f03\u76f8\u4f3c\u7684\u96f6\u4ef6\uff0c\u8acb\u700f\u89bd <a href=\"https:\/\/aft-forge.com\/zh\/bicycle-parts-bike-parts\/\">Aluminum Forging Bicycle Parts<\/a>\u00a0\u4ee5\u53ca\u6211\u5011\u7684 <a href=\"https:\/\/aft-forge.com\/zh\/category\/applications\/\">\u6c7d\u8eca\u92c1\u5408\u91d1\u935b\u9020\u61c9\u7528<\/a>, \u6216\u53c3\u89c0 <a href=\"https:\/\/aft-forge.com\/zh\/about-us\/\">\u516c\u53f8\u7c21\u4ecb<\/a> \u95dc\u65bc\u6211\u5011\u7684\u8a2d\u5099\u8207\u8a8d\u8b49\u3002.<\/p>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Forged Aluminum Bicycle Spider (Stepped): Five-Arm Chainring Carrier with Offset The stepped forged aluminum bicycle spider is also a five-arm chainring carrier, but its hub is a deeper cup, the five arms step outward from the cup rim with a height change, and one arm carries an extra extended lug. The three-dimensional form creates an [&hellip;]<\/p>\n","protected":false},"featured_media":834,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[24],"product_tag":[],"class_list":["post-833","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\/zh\/wp-json\/wp\/v2\/product\/833","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/comments?post=833"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/media\/834"}],"wp:attachment":[{"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/media?parent=833"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/product_brand?post=833"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/product_cat?post=833"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/aft-forge.com\/zh\/wp-json\/wp\/v2\/product_tag?post=833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}