{"id":2688,"date":"2026-08-26T10:38:41","date_gmt":"2026-08-26T02:38:41","guid":{"rendered":"https:\/\/cnsandcasting.com\/?post_type=product&#038;p=2688"},"modified":"2026-08-26T10:38:42","modified_gmt":"2026-08-26T02:38:42","slug":"tractor-three-point-hitch-lower-link-arm-c45e-casting-ningbo-ruican","status":"publish","type":"product","link":"https:\/\/cnsandcasting.com\/ru\/product\/tractor-three-point-hitch-lower-link-arm-c45e-casting-ningbo-ruican\/","title":{"rendered":"Tractor Three-Point Hitch Lower Link Arm"},"content":{"rendered":"<p class=\"code-line\" dir=\"auto\" data-line=\"88\">The lower link arms of a tractor&#8217;s three-point hitch are the primary structural members transmitting draft forces from mounted implements to the tractor chassis. They are subject to shock loading, bending, and torsional stress every time an implement hits a rock or the hitch is raised with a full load \u2014 which is why cast lower link arms with correct geometry and sound metallurgy consistently outperform fabricated plate weldments in fatigue life.<\/p>\n<p class=\"code-line\" dir=\"auto\" data-line=\"90\">Ningbo Ruican produces three-point hitch lower link arms by investment casting in C45E (AISI 1045 equivalent) medium carbon steel. The process reproduces the complex curved profile, progressive section changes, and integrated boss features of the original design in a single casting \u2014 no welds, no stress concentration at joints, no multi-part assembly.<\/p>\n<p class=\"code-line\" dir=\"auto\" data-line=\"92\">After casting, link arms are normalized, shot blasted, and CNC machined at the pin eyes and bushing bores to guarantee correct clearances for Category 1, 2, or 3 hitch geometry. Threaded features and wear bushings can be supplied fitted per customer requirement. Compatible with tractors from 25 HP compact models to 200 HP agricultural and utility tractors, for both OEM production lines and aftermarket distributors.<\/p>\n<h3 id=\"key-specifications-1\" class=\"code-line\" dir=\"auto\" data-line=\"94\">Key Specifications<\/h3>\n<table class=\"code-line\" dir=\"auto\" data-line=\"95\">\n<thead class=\"code-line\" dir=\"auto\" data-line=\"95\">\n<tr class=\"code-line\" dir=\"auto\" data-line=\"95\">\n<th>Parameter<\/th>\n<th>Specification<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"code-line\" dir=\"auto\" data-line=\"97\">\n<tr class=\"code-line\" dir=\"auto\" data-line=\"97\">\n<td>Material<\/td>\n<td>C45E medium carbon steel (AISI 1045 \/ DIN 1.1191 equivalent)<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"98\">\n<td>Manufacturing Process<\/td>\n<td>Water glass or silica sol investment casting + CNC machining<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"99\">\n<td>Heat Treatment<\/td>\n<td>Normalized (160\u2013210 HB); induction hardening of bores on request<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"100\">\n<td>Casting Tolerance<\/td>\n<td>ISO 8062 CT5\u2013CT6<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"101\">\n<td>Hitch Categories<\/td>\n<td>Category 1, 2, and 3 (DIN 9674 \/ ASAE S217)<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"102\">\n<td>Finish<\/td>\n<td>Shot blasted, black primer or e-coat per specification<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"103\">\n<td>Inspection<\/td>\n<td>CMM verification of pin-eye center distance, EN 10204 3.1 certificate<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"104\">\n<td>MOQ<\/td>\n<td>Flexible \u2014 from 100-piece aftermarket runs to full OEM volumes<\/td>\n<\/tr>\n<tr class=\"code-line\" dir=\"auto\" data-line=\"105\">\n<td>Optional Features<\/td>\n<td>Fitted bronze or hardened steel bushings, sway-limit chains, ball ends<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 id=\"why-lower-link-arms-fail--and-how-casting-prevents-it\" class=\"code-line\" dir=\"auto\" data-line=\"107\">Why Lower Link Arms Fail \u2014 and How Casting Prevents It<\/h3>\n<p class=\"code-line\" dir=\"auto\" data-line=\"108\">Field failures in lower link arms almost always start at weld toes or at abrupt section transitions in fabricated designs. Investment casting allows the arm to be shaped with generous fillets and tapered sections that follow the stress flow, and the wrought-like grain structure of a steel casting in C45E provides consistent strength along the full length of the arm. For aftermarket distributors, this means measurably fewer warranty claims on the most-abused part of the hitch.<\/p>\n<h3 id=\"why-choose-ningbo-ruican-1\" class=\"code-line\" dir=\"auto\" data-line=\"110\">Why Choose Ningbo Ruican<\/h3>\n<ul class=\"code-line\" dir=\"auto\" data-line=\"111\">\n<li class=\"code-line\" dir=\"auto\" data-line=\"111\"><strong>17+ years<\/strong>\u00a0supplying hitch and linkage components to agricultural machinery OEMs<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"112\"><strong>IATF 16949 certified<\/strong>\u00a0\u2014 process discipline that carries over to every farm equipment program<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"113\"><strong>Full-range hitch hardware:<\/strong>\u00a0lower links, lift rods, top links, ball joints, and yokes from one supplier<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"114\"><strong>Kitted aftermarket solutions:<\/strong>\u00a0matching left\/right arm pairs packed as ready-to-sell sets<\/li>\n<li class=\"code-line\" dir=\"auto\" data-line=\"115\"><strong>Drawings or samples accepted:<\/strong>\u00a0we reverse-engineer from used parts when drawings are unavailable<\/li>\n<li dir=\"auto\" data-line=\"115\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" data-attachment-id=\"2127\" data-permalink=\"https:\/\/cnsandcasting.com\/ru\/?attachment_id=2127\" data-orig-file=\"https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?fit=1024%2C1536&amp;ssl=1\" data-orig-size=\"1024,1536\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"\u8be6\u60c5\u9875\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?fit=683%2C1024&amp;ssl=1\" class=\"alignleft size-full wp-image-2127\" src=\"https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?resize=1024%2C1536&#038;ssl=1\" alt=\"\u8be6\u60c5\u9875\" width=\"1024\" height=\"1536\" srcset=\"https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?w=1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?resize=200%2C300&amp;ssl=1 200w, https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?resize=683%2C1024&amp;ssl=1 683w, https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?resize=768%2C1152&amp;ssl=1 768w, https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?resize=8%2C12&amp;ssl=1 8w, https:\/\/i0.wp.com\/cnsandcasting.com\/wp-content\/uploads\/2026\/08\/%E8%AF%A6%E6%83%85%E9%A1%B5.png?resize=600%2C900&amp;ssl=1 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The lower link arms of a tractor&#8217;s three-point hitch are the primary structural members transmitting draft forces from mounted implements to the tractor chassis. They are subject to shock loading, bending, and torsional stress every time an implement hits a rock or the hitch is raised with a full load \u2014 which is why cast [&hellip;]<\/p>\n","protected":false},"featured_media":2693,"template":"","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":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","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":""}},"jetpack_publicize_message":"{title}\r\n\r\n{excerpt}\r\n\r\n{url}","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false},"product_brand":[],"product_cat":[1392],"product_tag":[],"class_list":["post-2688","product","type-product","status-publish","has-post-thumbnail","product_cat-agricultural-machinery-parts","desktop-align-center","tablet-align-left","mobile-align-left","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tractor Three-Point Hitch Lower Link Arm - Ruican Machinery<\/title>\n<meta name=\"description\" content=\"Three-point hitch lower link arms for tractors from 25 to 200 HP. C45E carbon steel investment castings with machined bushing bores, IATF 16949 factory.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cnsandcasting.com\/ru\/product\/tractor-three-point-hitch-lower-link-arm-c45e-casting-ningbo-ruican\/\" \/>\n<meta property=\"og:locale\" content=\"ru_RU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tractor Three-Point Hitch Lower Link Arm - Ruican Machinery\" \/>\n<meta property=\"og:description\" content=\"Three-point hitch lower link arms for tractors from 25 to 200 HP. 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