{"id":4491,"date":"2023-05-02T13:11:27","date_gmt":"2023-05-02T13:11:27","guid":{"rendered":"https:\/\/tribologie-mannheim.de\/four-ball-tester\/"},"modified":"2024-03-12T11:01:08","modified_gmt":"2024-03-12T11:01:08","slug":"four-ball-tester","status":"publish","type":"page","link":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/","title":{"rendered":"Four Ball Tester"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"4491\" class=\"elementor elementor-4491 elementor-4430\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3d73e69 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3d73e69\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-dc88830\" data-id=\"dc88830\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-819b1c0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"819b1c0\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-96e4a50\" data-id=\"96e4a50\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2d91545 elementor-widget elementor-widget-image-carousel\" data-id=\"2d91545\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;navigation&quot;:&quot;none&quot;,&quot;image_spacing_custom&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:7,&quot;sizes&quot;:[]},&quot;autoplay&quot;:&quot;yes&quot;,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;infinite&quot;:&quot;yes&quot;,&quot;speed&quot;:500,&quot;image_spacing_custom_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;image_spacing_custom_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"image-carousel.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-image-carousel-wrapper swiper\" role=\"region\" aria-roledescription=\"carousel\" aria-label=\"Image Carousel\" dir=\"ltr\">\n\t\t\t<div class=\"elementor-image-carousel swiper-wrapper\" aria-live=\"off\">\n\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"1 of 5\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3600-768x513.jpg\" alt=\"_DSC3600\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"2 of 5\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3611-Bearbeitet-768x513.jpg\" alt=\"_DSC3611-Bearbeitet\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"3 of 5\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3602-Bearbeitet-768x513.jpg\" alt=\"_DSC3602-Bearbeitet\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4 of 5\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3576-Bearbeitet-768x513.jpg\" alt=\"_DSC3576-Bearbeitet\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"5 of 5\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3588-768x513.jpg\" alt=\"_DSC3588\" \/><\/figure><\/div>\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-da68ccf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"da68ccf\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-01bcd02\" data-id=\"01bcd02\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ad1a5ec elementor-widget elementor-widget-text-editor\" data-id=\"ad1a5ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<section data-id=\"9bc256d\" data-element_type=\"section\">\n<div>\n<div data-id=\"ee4a898\" data-element_type=\"column\">\n<div>\n<div data-id=\"1d1e171\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-4447 alignleft\" src=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3582-2-scaled-e1682691321226.jpg\" alt=\"\" width=\"334\" height=\"500\" srcset=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3582-2-scaled-e1682691321226.jpg 601w, https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3582-2-scaled-e1682691321226-200x300.jpg 200w\" sizes=\"(max-width: 334px) 100vw, 334px\" \/><span style=\"text-align: right;\">Testing in the Shell Four Ball Tester according to DIN 51 350 is used to determine characteristic values for lubricants with active ingredients that are intended to permit high surface pressure in the mixed friction area between surfaces moving relative to one another (EP additives). In addition, the wear protection behavior (AW behavior) of the lubricants can be tested at lower pressures.<\/span><\/p><p><span style=\"text-align: right;\">The lubricant is tested in a system of four identical balls consisting of one rotating ball (track ball) sliding on three balls (stationary balls). When testing according to part 2 (oils) and 4 (greases), the test load is increased until the balls are welded together. The procedure according to parts 3 and 5 is carried out at lower loads (150 and 300 N, respectively) and is used to determine the VKA wear characteristics. If required, the frictional torque can be recorded continuously.<\/span><\/p><\/div><\/div><\/div><\/div><\/div><\/section>\n<section data-id=\"fdaf5be\" data-element_type=\"section\">\n<div>\n<div data-id=\"d7e74e0\" data-element_type=\"column\">\n<div>\n<div data-id=\"e711187\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n<div>\n<p>The test bench is particularly widespread in the lubricant and additive industry, where it is routinely used for product development and quality control.<\/p>\n<p>A method developed by the company&nbsp;Volkswagen&nbsp;allows statements to be made about protection against pitting (VW standard PV 1444).&nbsp; With a separate shear adapter, the shear strength of polymer-containing lubricants can also be tested in accordance with DIN 51350 Part 6 using a tapered roller bearing.<\/p>\n<p>With the aid of a (nearly) adiabatic test head, it is possible to determine internal and external friction losses in axial deep groove ball bearings (PV 1454). This method is of particular interest for the development and investigation of light-running oils.<\/p>\n<p>The determination of electrical parameters in the Four Ball Tester (similar to the so-called GESA adapter of the University of Kaiserslautern) is currently gaining great importance. Impedance measurement can be used to determine how a lubricant behaves electrically in an axial deep groove ball bearing. Another method investigates at which voltages current passage occurs and thus damage to the rolling bearings.<\/p>\n<p>With a special adapter developed at the institute, almost all plain and roller bearings up to an&nbsp;outside diameter of 80 mm can be tested under axial load. In addition, the&nbsp;contact resistance between the test specimens can be measured and recorded during all tests.<\/p>\n<p>All measurement data is recorded. These adapters and modifications have upgraded the VKA to a very universally applicable modern test instrument.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2ab96e0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2ab96e0\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-25c0d51\" data-id=\"25c0d51\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e248844 elementor-tabs-view-horizontal elementor-widget elementor-widget-tabs\" data-id=\"e248844\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"tabs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-tabs\">\n\t\t\t<div class=\"elementor-tabs-wrapper\" role=\"tablist\" >\n\t\t\t\t\t\t\t\t\t<div id=\"elementor-tab-title-2371\" class=\"elementor-tab-title elementor-tab-desktop-title\" aria-selected=\"true\" data-tab=\"1\" role=\"tab\" tabindex=\"0\" aria-controls=\"elementor-tab-content-2371\" aria-expanded=\"false\">Load collective<\/div>\n\t\t\t\t\t\t\t\t\t<div id=\"elementor-tab-title-2372\" class=\"elementor-tab-title elementor-tab-desktop-title\" aria-selected=\"false\" data-tab=\"2\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2372\" aria-expanded=\"false\">Standards<\/div>\n\t\t\t\t\t\t\t\t\t<div id=\"elementor-tab-title-2373\" class=\"elementor-tab-title elementor-tab-desktop-title\" aria-selected=\"false\" data-tab=\"3\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2373\" aria-expanded=\"false\">Measurements<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<div class=\"elementor-tabs-content-wrapper\" role=\"tablist\" aria-orientation=\"vertical\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-tab-title elementor-tab-mobile-title\" aria-selected=\"true\" data-tab=\"1\" role=\"tab\" tabindex=\"0\" aria-controls=\"elementor-tab-content-2371\" aria-expanded=\"false\">Load collective<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-2371\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"tabpanel\" aria-labelledby=\"elementor-tab-title-2371\" tabindex=\"0\" hidden=\"false\"><\/p>\n<p><strong>Friction conditions<\/strong><\/p>\n<p style=\"padding-left: 40px;\">Boundary friction, mixed friction and elastohydrodynamics<\/p>\n<p><strong>Contact geometry<\/strong><\/p>\n<p style=\"padding-left: 40px;\">Point contact<\/p>\n<p><strong>Movement types<\/strong><\/p>\n<p style=\"padding-left: 40px;\">Gliding, rolling<\/p>\n<p><strong>Rotary speed<\/strong><\/p>\n<p style=\"padding-left: 40px;\">10 &#8230; 5.800 1\/min<\/p>\n<p><strong>Load<\/strong><\/p>\n<p style=\"padding-left: 40px;\">100 &#8230; 12.000 N<\/p>\n<p><strong>Temperature<\/strong><\/p>\n<p style=\"padding-left: 40px;\">-20 &#8230; 150 \u00b0C<\/p>\n<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-tab-title elementor-tab-mobile-title\" aria-selected=\"false\" data-tab=\"2\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2372\" aria-expanded=\"false\">Standards<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-2372\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"tabpanel\" aria-labelledby=\"elementor-tab-title-2372\" tabindex=\"0\" hidden=\"hidden\"><p><strong>DIN 51 350<\/strong>: Pr\u00fcfung von Schmierstoffen &#8211; Pr\u00fcfung im Vierkugel-Apparat<\/p>\n<p><strong>DIN 51 350\/2<\/strong>: Bestimmung der Schwei\u00dfkraft von fl\u00fcssigen Schmierstoffen<\/p>\n<p><strong>DIN 51 350\/3<\/strong>: Bestimmung von Verschlei\u00dfkennwerten fl\u00fcssiger Schmierstoffe<\/p>\n<p><strong>DIN 51 350\/4<\/strong>: Bestimmung der Schwei\u00dfkraft von konsistenten Schmierstoffen<\/p>\n<p><strong>DIN 51 350\/5<\/strong>: Bestimmung von Verschlei\u00dfkennwerten f\u00fcr konsistente Schmierstoffe<\/p>\n<p><strong>DIN 51 350\/6<\/strong>: Bestimmung der Scherstabilit\u00e4t von polymerhaltigen Schmier\u00f6len<\/p>\n<p><strong>ASTM D 2783-82<\/strong>: Measurement of EP-Properties of Lubricating Fluids<\/p>\n<p><strong>ASTM D 2783-82<\/strong>: Measurement of EP-Properties of Lubricating Grease<\/p>\n<p><strong>ASTM D 4172-82: <\/strong>Wear Preventive Characteristics of Lubricating Fluids<\/p>\n<p><strong>ASTM D 2266-86: <\/strong>Wear Preventive Characteristics of Lubricating Grease<\/p>\n<p><strong>IP 239 \/ 85: <\/strong>EP-Properties: Friction and Wear Tests for Lubrications<\/p>\n<p><strong>CEC L-45-T-93: <\/strong>Viscosity Shear Stability of Transmission Lubricants<\/p>\n<p><b>EN ISO 20623:2018: <\/b>Determination of the extreme pressure (EP) and anti-wear properties of lubricants &#8211; Four-ball method (European conditions)<\/p>\n<h4>Other tests<\/h4>\n<ul>\n<li>Determination of electrical characteristics in an axial roller bearing in the VKA (NA 062-06-53 AA); so-called &#8220;GESA adapter&#8221;<\/li>\n<li>Determination of friction and wear as a function of load, temperature, sliding speed and lubricant<\/li>\n<li>Determination of the steady-state temperature and frictional torque of tapered roller and thrust ball bearings as a function of load, temperature, sliding speed and lubricant (VW PV 1454)<\/li>\n<li>Ball-on-three-plates test (BOTP)<\/li>\n<li>VKA pitting test (VW PV 1444)<\/li>\n<\/ul>\n<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-tab-title elementor-tab-mobile-title\" aria-selected=\"false\" data-tab=\"3\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2373\" aria-expanded=\"false\">Measurements<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-2373\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"tabpanel\" aria-labelledby=\"elementor-tab-title-2373\" tabindex=\"0\" hidden=\"hidden\"><ul>\n<li>Wear<\/li>\n<li>Welding force<\/li>\n<li>Frictional torque<\/li>\n<li>Lubricant temperature<\/li>\n<li>Contact resistance<\/li>\n<li>Impedance (up to 10 MHz)<\/li>\n<\/ul>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p> &#8230; <a title=\"Four Ball Tester\" class=\"read-more\" href=\"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/\" aria-label=\"Read more about Four Ball Tester\">Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","footnotes":""},"class_list":["post-4491","page","type-page","status-publish"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Four Ball Tester - Tribologie Mannheim<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Four Ball Tester - Tribologie Mannheim\" \/>\n<meta property=\"og:description\" content=\"... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/\" \/>\n<meta property=\"og:site_name\" content=\"Tribologie Mannheim\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-12T11:01:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3600-scaled-e1683034436976-768x575.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/\",\"url\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/\",\"name\":\"Four Ball Tester - Tribologie Mannheim\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/tribologie-mannheim.de\\\/wp-content\\\/uploads\\\/2023\\\/04\\\/DSC3600-scaled-e1683034436976-768x575.jpg\",\"datePublished\":\"2023-05-02T13:11:27+00:00\",\"dateModified\":\"2024-03-12T11:01:08+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/#primaryimage\",\"url\":\"https:\\\/\\\/tribologie-mannheim.de\\\/wp-content\\\/uploads\\\/2023\\\/04\\\/DSC3600-scaled-e1683034436976-768x575.jpg\",\"contentUrl\":\"https:\\\/\\\/tribologie-mannheim.de\\\/wp-content\\\/uploads\\\/2023\\\/04\\\/DSC3600-scaled-e1683034436976-768x575.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/four-ball-tester\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/start\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Four Ball Tester\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/\",\"name\":\"Tribologie Mannheim\",\"description\":\"Kompetenzzentrum Tribologie Mannheim\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/tribologie-mannheim.de\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Four Ball Tester - Tribologie Mannheim","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/","og_locale":"en_US","og_type":"article","og_title":"Four Ball Tester - Tribologie Mannheim","og_description":"... Read more","og_url":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/","og_site_name":"Tribologie Mannheim","article_modified_time":"2024-03-12T11:01:08+00:00","og_image":[{"url":"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3600-scaled-e1683034436976-768x575.jpg","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/","url":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/","name":"Four Ball Tester - Tribologie Mannheim","isPartOf":{"@id":"https:\/\/tribologie-mannheim.de\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/#primaryimage"},"image":{"@id":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/#primaryimage"},"thumbnailUrl":"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3600-scaled-e1683034436976-768x575.jpg","datePublished":"2023-05-02T13:11:27+00:00","dateModified":"2024-03-12T11:01:08+00:00","breadcrumb":{"@id":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/#primaryimage","url":"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3600-scaled-e1683034436976-768x575.jpg","contentUrl":"https:\/\/tribologie-mannheim.de\/wp-content\/uploads\/2023\/04\/DSC3600-scaled-e1683034436976-768x575.jpg"},{"@type":"BreadcrumbList","@id":"https:\/\/tribologie-mannheim.de\/en\/four-ball-tester\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/tribologie-mannheim.de\/en\/start\/"},{"@type":"ListItem","position":2,"name":"Four Ball Tester"}]},{"@type":"WebSite","@id":"https:\/\/tribologie-mannheim.de\/en\/#website","url":"https:\/\/tribologie-mannheim.de\/en\/","name":"Tribologie Mannheim","description":"Kompetenzzentrum Tribologie Mannheim","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/tribologie-mannheim.de\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/pages\/4491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/comments?post=4491"}],"version-history":[{"count":5,"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/pages\/4491\/revisions"}],"predecessor-version":[{"id":4822,"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/pages\/4491\/revisions\/4822"}],"wp:attachment":[{"href":"https:\/\/tribologie-mannheim.de\/en\/wp-json\/wp\/v2\/media?parent=4491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}