{"id":14826,"date":"2021-06-10T16:23:24","date_gmt":"2021-06-10T16:23:24","guid":{"rendered":"https:\/\/www.core-sensing.de\/2021\/06\/10\/strain-gauges-in-bores-of-pipes-and-hollow-shafts\/"},"modified":"2026-03-13T14:41:28","modified_gmt":"2026-03-13T14:41:28","slug":"strain-gauges-in-bores-of-pipes-and-hollow-shafts","status":"publish","type":"post","link":"https:\/\/www.core-sensing.de\/en\/2021\/06\/10\/strain-gauges-in-bores-of-pipes-and-hollow-shafts\/","title":{"rendered":"Strain gauges in bores of pipes and hollow shafts"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"14826\" class=\"elementor elementor-14826 elementor-8477\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3bb4c138 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3bb4c138\" 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-16cbf73d\" data-id=\"16cbf73d\" 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-663c5019 elementor-widget elementor-widget-text-editor\" data-id=\"663c5019\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><\/p><p>Measuring forces and torques on rotating components is often a major challenge, especially when high speeds or environmental influences occur simultaneously. Measuring inside a hollow shaft is a very good alternative to established external strain gauge application. We describe the basics of strain gauges, advantages and disadvantages, and the possibility of cost-effectively measuring in the bore using new technologies.  &nbsp;<\/p><p>In industrial drives in mechanical engineering, many rotating components are made of pipes or hollow shafts. The measurement data from these components is of crucial relevance, as these are dynamically stressed machine elements such as couplings, screw spindles, and cardan shafts. <\/p><h2>Strain gauge application as a simple &amp; smart solution<\/h2><p>Stress detection is possible through the application of strain gauges (SGs). These can be bonded to the component using cold- or heat-curing adhesives and provide precise data, which can be further processed in a measuring amplifier thanks to the linear relationship between component and strain gauge elongation. This makes strain gauges an intelligent and simple solution. <\/p><h3>Disadvantages of classic strain gauge application<\/h3><p>However, classic strain gauge application has a decisive disadvantage: <span style=\"color: var( --e-global-color-fbd81fe ); font-family: var( --e-global-typography-53af910-font-family ), Sans-serif; font-size: var(--nd-global-font-size-copy); letter-spacing: var( --e-global-typography-53af910-letter-spacing ); word-spacing: var( --e-global-typography-53af910-word-spacing );\">Harsh environmental conditions usually prevail on dynamic machine elements. Lubricating oils, dirt, but also mechanical influences during assembly make the application of strain gauges difficult and usually prevent their use. Furthermore, high centrifugal forces act on electronics and cables on rotating shafts.<\/span><\/p><p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20129c40 elementor-widget elementor-widget-text-editor\" data-id=\"20129c40\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><\/p><h2>Strain gauges inside the components<\/h2><p style=\"color: #162837; font-family: 'Futura PT', sans-serif; letter-spacing: normal; word-spacing: 0px; --nd-magic-var: no; font-size: 19.8px;\">One solution is to place the strain gauges inside the pipes or hollow shafts. The machine element thus protects the sensor from environmental influences, and centrifugal forces are reduced by decreasing the distance to the axis of rotation.<\/p><p style=\"color: #162837; font-family: 'Futura PT', sans-serif; letter-spacing: normal; word-spacing: 0px; --nd-magic-var: no; font-size: 19.8px;\">As with external strain gauge application, a pair of strain gauges must be positioned and bonded very precisely. However, the necessary preparation of the bonding point, the application of contact pressure, and especially the soldering is hardly possible inside pipes and hollow shafts.<\/p><p style=\"color: #162837; font-family: 'Futura PT', sans-serif; letter-spacing: normal; word-spacing: 0px; --nd-magic-var: no; font-size: 19.8px;\">For diameters that are too small (&lt;70 mm), the application of strain gauges on the inside is almost impossible, as this can only be done with great effort and with the help of special tools using a prepared strain gauge. Economic efficiency is rarely achieved in these cases. <\/p><p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2bfee0ef elementor-widget elementor-widget-text-editor\" data-id=\"2bfee0ef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><\/p><h3>Precise measurement data from inside the component<\/h3><p>However, the advantages of internal application cannot be denied. Usually, the outer surfaces of the machine elements are also active surfaces and therefore cannot be used. This creates the first opportunity to obtain precise and direct measurement data. In addition, the lower centrifugal forces and protection from environmental influences offer great benefits for many companies. This benefit lies primarily in improved process monitoring.  <\/p><h3>coreIN &#8211; the integrated sensor solution<\/h3><p>The integrated sensor solution from core sensing offers the possibility of correctly and easily detecting the load in the component for both small and large internal diameters. In the diameter range from 14 mm (special sizes on request), we offer sensor elements that can be integrated into the interior of the pipe and safely and reliably detect the loads there. &nbsp;<\/p><p><\/p>\t\t\t\t\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-084751e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"084751e\" 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-50 elementor-top-column elementor-element elementor-element-1c02b0d\" data-id=\"1c02b0d\" 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-56eb4dc elementor-widget elementor-widget-text-editor\" data-id=\"56eb4dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Further information on coreIN can be found here:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f8d8d07 elementor-widget elementor-widget-text-editor\" data-id=\"f8d8d07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"color: #162837; font-family: 'Futura PT', sans-serif; letter-spacing: normal; word-spacing: 0px; --nd-magic-var: no; font-size: 19.8px;\">Alternatively, we are also able to apply strain gauges from the inside or outside. Both with cold and hot application. <\/p><p style=\"color: #162837; font-family: 'Futura PT', sans-serif; letter-spacing: normal; word-spacing: 0px; --nd-magic-var: no; font-size: 19.8px;\">Simply contact us!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-f104aa3\" data-id=\"f104aa3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\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<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Proven strain gauge technology for measuring forces and torques in pipes and hollow shafts: challenges, fundamentals, and solution concepts. <\/p>\n","protected":false},"author":3,"featured_media":14827,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[38],"tags":[],"class_list":["post-14826","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sensor-expertise"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Strain gauges in bores of pipes and hollow shafts - staging.core-sensing<\/title>\n<meta name=\"description\" content=\"Proven strain gauge technology for measuring forces and torques in pipes and hollow shafts | Intelligent sensor technology for measurement tasks.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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