{"id":26704,"date":"2024-02-16T18:24:29","date_gmt":"2024-02-16T09:24:29","guid":{"rendered":"https:\/\/de.meviy.misumi-ec.com\/info\/?p=26704"},"modified":"2025-05-03T19:58:10","modified_gmt":"2025-05-03T10:58:10","slug":"what-is-positional-accuracy-in-mechanical-design","status":"publish","type":"post","link":"https:\/\/de.meviy.misumi-ec.com\/info\/en\/blog-en\/manufacturing-en\/26704\/","title":{"rendered":"What is Positional Accuracy in Mechanical Design"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"26704\" class=\"elementor elementor-26704\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dee5e7b e-flex e-con-boxed e-con e-parent\" data-id=\"dee5e7b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dfb81f7 elementor-widget elementor-widget-text-editor\" data-id=\"dfb81f7\" 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<p><span style=\"color: #000000; font-size: 14pt;\">Positional accuracy stands as a cornerstone in mechanical design, embodying a fundamental principle that underpins the functionality and efficiency of countless engineered systems. In this blog post, we delve into the intricacies of positional accuracy, exploring its significance, methods of evaluation, and techniques for enhancement.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fafa086 elementor-widget elementor-widget-image\" data-id=\"fafa086\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"819\" height=\"394\" src=\"https:\/\/de.meviy.misumi-ec.com\/info\/wp-content\/uploads\/2024\/02\/Positional-accuracy.webp\" class=\"attachment-large size-large wp-image-26715\" alt=\"an engineer working on a CAD software to optimize positional accuracy\" srcset=\"https:\/\/de.meviy.misumi-ec.com\/info\/wp-content\/uploads\/2024\/02\/Positional-accuracy.webp 819w, https:\/\/de.meviy.misumi-ec.com\/info\/wp-content\/uploads\/2024\/02\/Positional-accuracy-300x144.webp 300w, https:\/\/de.meviy.misumi-ec.com\/info\/wp-content\/uploads\/2024\/02\/Positional-accuracy-768x369.webp 768w\" sizes=\"(max-width: 819px) 100vw, 819px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4628591 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"4628591\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-md\" href=\"https:\/\/meviy.misumi-ec.com\/en_gb-de\/login\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Upload your 3D CAD data<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ac7f7a0 e-flex e-con-boxed e-con e-parent\" data-id=\"ac7f7a0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5e4c305 elementor-widget elementor-widget-heading\" data-id=\"5e4c305\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Positional Accuracy?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45c1f0f elementor-widget elementor-widget-text-editor\" data-id=\"45c1f0f\" 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<p><span style=\"color: #000000; font-size: 14pt;\">Positional accuracy defines the ability of components within a mechanical system to attain and maintain their intended positions relative to one another. It encompasses the precision with which parts align, mate, and interact, ultimately shaping the performance, reliability, and longevity of the overall assembly.<\/span><\/p><p><span style=\"color: #000000; font-size: 14pt;\">Machines are typically composed of multiple parts. Whether it&#8217;s automobiles, home appliances, or even small smartphones, they all consist of numerous components. When assembling these parts, it&#8217;s critical to ensure the accurate positioning of each component relative to others.<\/span><\/p><p>\u00a0<\/p><p><span style=\"color: #000000; font-size: 14pt;\">&#8220;Good positional accuracy&#8221; refers to the ideal positioning of each part relative to others. Conversely, &#8220;poor positional accuracy&#8221; means that the parts are not ideally positioned. Since the dimensions of each part rarely match the ideal size precisely, they often have variations within <a href=\"https:\/\/de.meviy.misumi-ec.com\/info\/en\/blog-en-c\/news-en-c\/26165\/\">tolerance <\/a>ranges. These dimensional variations can lead to misalignment when assembling the parts.<\/span><\/p>\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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-65f4d81 e-flex e-con-boxed e-con e-parent\" data-id=\"65f4d81\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dc1b9b8 elementor-widget elementor-widget-heading\" data-id=\"dc1b9b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The importance of positional accuracy<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49caa94 elementor-widget elementor-widget-text-editor\" data-id=\"49caa94\" 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<p><span style=\"color: #000000; font-size: 14pt;\">So, what happens if the positional accuracy is poor? Let&#8217;s explore some examples of potential issues that may arise:<\/span><\/p><p><span style=\"color: #000000; font-size: 14pt;\">\u00a0<\/span><\/p><p>\u00a0<\/p><ol><li><span style=\"color: #000000; font-size: 14pt;\"><strong>1. Assembly failure<\/strong>: For instance, consider the battery cover of a remote control. If the cover is too large and the casing is too narrow, it won&#8217;t fit properly, resulting in a defective product that cannot be assembled.<\/span><\/li><li><span style=\"color: #000000; font-size: 14pt;\">\u00a0<\/span><\/li><\/ol><ol start=\"2\"><li><span style=\"color: #000000; font-size: 14pt;\"><strong>2. Generation of abnormal noise or wear<\/strong>: Two adjacent gears with the correct center-axis distance can smoothly transmit power. However, if there is a misalignment in the center-axis position, the meshing of gears becomes poor, leading to abnormal noise or wear.<\/span><\/li><li><span style=\"color: #000000; font-size: 14pt;\">\u00a0<\/span><\/li><\/ol><ol start=\"3\"><li><span style=\"color: #000000; font-size: 14pt;\"><strong>3. Damage<\/strong>: Attempting to forcefully assemble poorly positioned parts can result in damage. Even if assembly is successful, there&#8217;s a risk of parts interfering with each other during machine operation, potentially leading to damage.<\/span><\/li><\/ol>\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\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b04d929 e-flex e-con-boxed e-con e-parent\" data-id=\"b04d929\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a7a4657 elementor-widget elementor-widget-heading\" data-id=\"a7a4657\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Methods for Improving Positional Accuracy<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-541d902 elementor-widget elementor-widget-text-editor\" data-id=\"541d902\" 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<p><span style=\"color: #000000; font-size: 14pt;\">Let&#8217;s discuss three methods for improving positional accuracy.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e513c3 elementor-widget elementor-widget-heading\" data-id=\"2e513c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Designing Shapes for Positioning:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-99c3936 elementor-widget elementor-widget-text-editor\" data-id=\"99c3936\" 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<p><span style=\"color: #000000; font-size: 14pt;\">Positioning shapes are designed to guide parts to the correct positions. For example, if there is a hole in one part and a protrusion in the mating part, inserting the protrusion into the hole aligns the parts correctly. These holes are called positioning holes, and the protrusions are called bosses. Positioning is crucial for assembling parts and is a commonly used design feature.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37e4b01 elementor-widget elementor-widget-heading\" data-id=\"37e4b01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Tightening Dimensional Tolerances on Drawings:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d39c233 elementor-widget elementor-widget-text-editor\" data-id=\"d39c233\" 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<p><span style=\"color: #000000; font-size: 14pt;\">This method aims to reduce variations in part dimensions. It&#8217;s a simple approach that&#8217;s often used since it can be implemented with drawing instructions alone. However, tightening tolerances for entire parts can significantly increase costs. Therefore, it&#8217;s common to impose strict dimensional tolerances only on the parts that determine positioning, like the positioning holes and bosses mentioned earlier. Care must be taken not to exceed the feasible tolerances for machining.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c99a70b elementor-widget elementor-widget-heading\" data-id=\"c99a70b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Fixture Assembly:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e543421 elementor-widget elementor-widget-text-editor\" data-id=\"e543421\" 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<p><span style=\"color: #000000; font-size: 14pt;\">Using fixtures during assembly is another method. Fixtures secure two parts in ideal positions during assembly, contributing to improved positional accuracy. While fixtures require sufficient precision, they simplify tasks and can increase work efficiency. However, it&#8217;s important to note that if a product is disassembled, reassembly may not be possible without the fixture.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-349b9c4 elementor-widget elementor-widget-heading\" data-id=\"349b9c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-82ecc90 elementor-widget elementor-widget-text-editor\" data-id=\"82ecc90\" 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<p><span style=\"color: #000000; font-size: 14pt;\">Considering positional accuracy in mechanical design is fundamental and critical. It affects both assembly and functionality since machines consist of various combinations of parts. When designing machines, it&#8217;s essential to be mindful of positional accuracy from the outset. The poor positional accuracy may cause noise, tears and other damage as well as assembly failures. There are several ways to improve poor positional accuracy.<\/span><\/p>\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\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Positional accuracy stands as a cornerstone in mechanical design, embodying a fundamental principle that underpins the functionality and efficiency of countless engineered systems. In this blog post, we delve into the intricacies of positional accuracy, exploring its significance, methods of evaluation, and techniques for enhancement. Upload your 3D CAD data What is Positional Accuracy? Positional accuracy defines the ability of components within a mechanical system to attain and maintain their intended positions relative to one another. It encompasses the precision with which parts align, mate, and interact, ultimately shaping the performance, reliability, and longevity of the overall assembly. Machines are typically composed of multiple parts. Whether it&#8217;s automobiles, home appliances, [&hellip;]<\/p>\n","protected":false},"author":59,"featured_media":26715,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[202],"tags":[184,185,182],"class_list":["post-26704","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-manufacturing-en","tag-cad","tag-cad-design","tag-component-design"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Positional Accuracy in Mechanical Design<\/title>\n<meta name=\"description\" content=\"Unlock the secrets of mechanical design by unraveling the essence of this engineering concept of positional accuracy.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/de.meviy.misumi-ec.com\/info\/en\/blog-en\/manufacturing-en\/26704\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Positional Accuracy in Mechanical Design\" \/>\n<meta property=\"og:description\" content=\"Unlock the secrets of mechanical design by unraveling the essence of this engineering concept of positional accuracy.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/de.meviy.misumi-ec.com\/info\/en\/blog-en\/manufacturing-en\/26704\/\" \/>\n<meta property=\"og:site_name\" content=\"meviy Europe - 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