{"id":3809,"date":"2021-08-16T09:38:19","date_gmt":"2021-08-16T09:38:19","guid":{"rendered":"https:\/\/www.fhopepack.com\/videos\/?p=3809"},"modified":"2026-10-18T04:02:06","modified_gmt":"2026-10-18T04:02:06","slug":"stteel-sheet-inverter-and-turning-machine","status":"publish","type":"post","link":"https:\/\/www.fhopepack.com\/videos\/stteel-sheet-inverter-and-turning-machine\/","title":{"rendered":"Steel sheet inverter and turning machine"},"content":{"rendered":"<blockquote>\n<p><strong>Executive summary<\/strong><\/p>\n<p>A steel sheet inverter and turning machine turns a stack of steel sheet upside down, so the underside can be checked or the stack set down the other way up. Ours is a C-type inverter: a forklift sets the stack in the C, a hydraulic holder presses it from the top, and a geared motor turns the C through 180\u00b0. Our quoted C-type unit takes 4 t and loads of 1,000\u20134,000 mm length. A worked example checks a 3.7 t stack.<\/p>\n<\/blockquote>\n<iframe loading=\"lazy\" width=\"940\" height=\"535\" src=\"https:\/\/www.youtube.com\/embed\/f3b2xgwEYig\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<h2 id=\"table-of-contents\">Table of Contents<\/h2>\n<ul>\n<li><a href=\"#why\">Why steel sheet stacks are inverted<\/a><\/li>\n<li><a href=\"#machine\">C-type steel sheet inverter construction<\/a><\/li>\n<li><a href=\"#turn\">The 180\u00b0 turn, step by step<\/a><\/li>\n<li><a href=\"#specs\">C-type sheet inverter data<\/a><\/li>\n<li><a href=\"#example\">Worked example: a 3.7 t sheet stack<\/a><\/li>\n<li><a href=\"#shipping\">Shipping and installation<\/a><\/li>\n<li><a href=\"#selection-checklist\">Selection checklist<\/a><\/li>\n<li><a href=\"#safety\">Safety: EN 415-10 and ISO 12100<\/a><\/li>\n<li><a href=\"#engineering-faq\">Engineering FAQ<\/a><\/li>\n<li><a href=\"#next-step\">Next step<\/a><\/li>\n<li><a href=\"#related-reading\">Related reading<\/a><\/li>\n<li><a href=\"#sources\">Sources<\/a><\/li>\n<\/ul>\n<h2 id=\"why\">Why steel sheet stacks are inverted<\/h2>\n<p>A stack of cut sheet is inspected from the top. The bottom sheet, where marks and edge damage often hide, cannot be seen without turning the whole stack. Turning by crane means slinging a loose stack and flipping it in the air, which is slow and can let sheets slide.<\/p>\n<p>An inverter turns the stack in a frame, clamped, on the floor. It is also used to swap a damaged pallet or skid, or to present the other face to the next process.<\/p>\n<h2 id=\"machine\">C-type steel sheet inverter construction<\/h2>\n<p>The machine has a blue base and a large yellow C-shaped turning frame on a horizontal axis. Inside the C are the lower table and an upper holder, with hydraulic hoses running to the cylinders. The C opens to one side, so a forklift can set the stack in and take it out. The operator controls it from a panel or remote, standing clear of the frame.<\/p>\n<h2 id=\"turn\">The 180\u00b0 turn, step by step<\/h2>\n<ol>\n<li><strong>Load.<\/strong> The forklift sets the stack on the lower table of the C.<\/li>\n<li><strong>Clamp.<\/strong> The hydraulic holder comes down onto the top of the stack. The pressing force is adjustable.<\/li>\n<li><strong>Turn.<\/strong> The geared motor turns the C at a fixed speed through 180\u00b0, with smooth, vibration-free motion.<\/li>\n<li><strong>Stop.<\/strong> Mechanical and electrical stop blocks end the turn at 180\u00b0.<\/li>\n<li><strong>Release.<\/strong> The holder, now underneath, carries the stack. The clamp opens and the forklift takes the stack out.<\/li>\n<\/ol>\n<p>The forks need a way in on both sides of the turn. The lower table has fork gaps for loading. For unloading after the turn, the stack sits on bearers or a skid, or the holder is given fork gaps too. We agree which at quote.<\/p>\n<p>The turn time is t = 180\u00b0 \u00f7 \u03c9, where \u03c9 is the fixed turning speed in degrees per second; we confirm it at quote for the load.<\/p>\n<p>If power is lost, the position locks automatically and resets softly when power returns.<\/p>\n<h2 id=\"specs\">C-type sheet inverter data<\/h2>\n<p>From our quotation for a C-type steel sheet inverter for 180\u00b0 turning:<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left\">Item<\/th>\n<th style=\"text-align: left\">Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left\">Max. load<\/td>\n<td style=\"text-align: left\">4 t<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Load size<\/td>\n<td style=\"text-align: left\">L 1,000\u20134,000 \u00d7 W 800\u20131,500 \u00d7 H 80\u2013400 mm<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Drive<\/td>\n<td style=\"text-align: left\">3.0 kW turning gear motor + 2.2 kW hydraulic unit (5.2 kW)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Loading<\/td>\n<td style=\"text-align: left\">forklift<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Clamping<\/td>\n<td style=\"text-align: left\">hydraulic top press-down holder, adjustable force<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Clamp opening<\/td>\n<td style=\"text-align: left\">set by hand to the stack height; the cylinder stroke then does the clamping<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Footprint and height (L \u00d7 W \u00d7 H)<\/td>\n<td style=\"text-align: left\">about 3,000 \u00d7 2,200 \u00d7 2,200 mm<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Weight of the machine<\/td>\n<td style=\"text-align: left\">about 2.5 t<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Safety<\/td>\n<td style=\"text-align: left\">E-stop, sensors, guards, stop blocks, power-loss position lock<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The cylinders are double acting, the hydraulic system works up to 18 MPa, and the lower table has fork gaps for loading. Wire colours and sizes in the cabinet follow EN 60204-1.<\/p>\n<h2 id=\"example\">Worked example: a 3.7 t sheet stack<\/h2>\n<p>Illustrative stack: 2,500 \u00d7 1,250 \u00d7 150 mm of steel sheet.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left\">Check<\/th>\n<th style=\"text-align: left\">Calculation<\/th>\n<th style=\"text-align: left\">Result<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left\">Volume<\/td>\n<td style=\"text-align: left\">2.5 \u00d7 1.25 \u00d7 0.15 m<\/td>\n<td style=\"text-align: left\">\u2248 0.47 m\u00b3<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Mass<\/td>\n<td style=\"text-align: left\">0.47 m\u00b3 \u00d7 7,850 kg\/m\u00b3<\/td>\n<td style=\"text-align: left\">\u2248 3.68 t<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Against 4 t rating<\/td>\n<td style=\"text-align: left\">3.68 \u00f7 4<\/td>\n<td style=\"text-align: left\">\u2248 92%<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Size<\/td>\n<td style=\"text-align: left\">2,500 \/ 1,250 \/ 150 mm<\/td>\n<td style=\"text-align: left\">inside 1,000\u20134,000 \/ 800\u20131,500 \/ 80\u2013400 mm<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left\">Out-of-balance torque, 50 mm off-centre<\/td>\n<td style=\"text-align: left\">3,680 \u00d7 9.81 \u00d7 0.05<\/td>\n<td style=\"text-align: left\">\u2248 1.8 kN\u00b7m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Result.<\/strong> The stack fits, at about 92% of the rated load. Placing it centred in the C matters: every 50 mm off-centre adds about 1.8 kN\u00b7m that the drive has to hold through the turn. For stacks near the limit, or longer than 4,000 mm, we size a heavier frame.<\/p>\n<h2 id=\"shipping\">Shipping and installation<\/h2>\n<p>For larger inverters we make the turning structure in two parts so the machine fits in a 40 ft high-cube container. On site, the two parts are joined and locked, the power is connected and the machine is ready to run.<\/p>\n<h2 id=\"selection-checklist\">Selection checklist<\/h2>\n<ol>\n<li>Stack length, width, height and weight.<\/li>\n<li>Sheet thickness and surface finish.<\/li>\n<li>Loading: forklift, crane or conveyor.<\/li>\n<li>Turns per hour.<\/li>\n<li>Space and floor at the site.<\/li>\n<li>Voltage and control: panel or remote.<\/li>\n<\/ol>\n<h2 id=\"safety\">Safety: EN 415-10 and ISO 12100<\/h2>\n<p>We design the inverter to EN 415-10 and assess its risks to ISO 12100. The turning C, the clamp and the load are the hazards. The operator works from the panel or remote, outside the swing of the C. Stop blocks, sensors and the power-loss lock keep the frame from moving unexpectedly. Guards and CE documents are agreed per project, from either party, to suit local law.<\/p>\n<h2 id=\"engineering-faq\">Engineering FAQ<\/h2>\n<p>Q: What stops sheets sliding during the turn?\nA: The hydraulic holder presses the stack from the top through the whole turn, with the force set to the load.<\/p>\n<p>Q: What happens on a power failure?\nA: The position locks automatically, and resets softly when power returns.<\/p>\n<p>Q: Can it take a crane load instead of a forklift?\nA: The standard C is forklift-loaded; other loading is designed per project.<\/p>\n<p>Q: Which standard applies?\nA: EN 415-10 for the machine, with ISO 12100 for the risk assessment.<\/p>\n<h2 id=\"next-step\">Next step<\/h2>\n<ol>\n<li><strong>Send stack sizes and weights<\/strong> to info@fhopepack.com.<\/li>\n<li><strong>We size<\/strong> the C frame and drive.<\/li>\n<li><strong>We reply within 24 hours<\/strong> with a drawing and quotation.<\/li>\n<\/ol>\n<h2 id=\"related-reading\">Related reading<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.fhopepack.com\/Mechanical\/Load-Inverter.html\">Load inverter (product)<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/videos\/mechanical-inverter-180-and-rotator\/\">Mechanical inverter 180\u00b0 and rotator<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/videos\/steel-sheet-pallet-inverter\/\">Steel sheet pallet inverter<\/a><\/li>\n<li><a href=\"https:\/\/www.fhopepack.com\/videos\/steel-sheet-upender-for-180-degree-safety-turning\/\">Steel sheet upender for 180\u00b0 safety turning<\/a><\/li>\n<\/ul>\n<h2 id=\"sources\">Sources<\/h2>\n<ul>\n<li>FHOPE C-type steel sheet inverter quotation (technical data)<\/li>\n<li>FHOPE project notes on two-part shipping and installation<\/li>\n<li>Our sheet inverter shown above<\/li>\n<li>Worked example: illustrative figures; steel density 7,850 kg\/m\u00b3<\/li>\n<li>Standards: EN 415-10; ISO 12100:2010<\/li>\n<\/ul>\n<p><strong>Last reviewed:<\/strong> 2026-10-18<\/p>","protected":false},"excerpt":{"rendered":"<p>Executive summary A steel sheet inverter and turning machine turns a stack of steel sheet upside down, so the underside can be checked or the stack set down the other way up. Ours is a [&hellip;]<\/p>","protected":false},"author":1,"featured_media":3810,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Steel Sheet Inverter and Turning Machine | FHOPE","_seopress_titles_desc":"Our C-type steel sheet inverter turns sheet stacks 180\u00b0 with a hydraulic top holder: 4 t data, a 3.7 t stack example, shipping in two parts, EN 415-10.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"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":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","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":""}},"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[290,194],"tags":[259,439,440],"class_list":["post-3809","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pallet-inverter","category-tilterupender","tag-pallet-inverter","tag-steel-sheet-inverter","tag-steel-sheet-turning"],"_links":{"self":[{"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/posts\/3809","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/comments?post=3809"}],"version-history":[{"count":7,"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/posts\/3809\/revisions"}],"predecessor-version":[{"id":17023,"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/posts\/3809\/revisions\/17023"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/media\/3810"}],"wp:attachment":[{"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/media?parent=3809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/categories?post=3809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fhopepack.com\/videos\/wp-json\/wp\/v2\/tags?post=3809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}