{"id":274,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/torsional-analysis\/"},"modified":"2026-05-23T22:39:51","modified_gmt":"2026-05-23T22:39:51","slug":"torsional-analysis","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/hy\/glossary\/torsional-analysis\/","title":{"rendered":"What is Torsional Analysis? Twisting Vibration Assessment"},"content":{"rendered":"<h1>Understanding Torsional Analysis<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/balanset-1\/\" title=\"Portable balancer &#038; Vibration analyzer Balanset-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A full kit portable balancer and vibration analyzer\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/hy\/product-category\/devices\/\" rel=\"tag\">Devices<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/hy\/product\/balanset-1\/\" title=\"Portable balancer &#038; Vibration analyzer Balanset-1A\">Portable balancer &#038; Vibration analyzer Balanset-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span>1,975.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"Add to cart: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/vibration-sensor\/\" title=\"Vibration sensor\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A vibration sensor close-up\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/hy\/product-category\/parts\/\" rel=\"tag\">Parts<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/hy\/product\/vibration-sensor\/\" title=\"Vibration sensor\">Vibration sensor<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span>90.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"Add to cart: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optical Sensor (Laser Tachometer)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Optical Sensor (Laser Tachometer)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/hy\/product-category\/parts\/\" rel=\"tag\">Parts<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/hy\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optical Sensor (Laser Tachometer)\">Optical Sensor (Laser Tachometer)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span>124.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"Add to cart: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/balanset-4\/\" title=\"Balanset-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Vibromera rotor balancing kit: carry case, multi-channel signal conditioner, handheld analyzer, magnetic base, vibration sensors, and coiled cables.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/hy\/product-category\/devices\/\" rel=\"tag\">Devices<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/hy\/product\/balanset-4\/\" title=\"Balanset-4\">Balanset-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span>6,803.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"Add to cart: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Add to cart<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/hy\/product\/magnet-stand\/\" title=\"Magnetic Stand Insize-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Magnet base.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/hy\/product-category\/parts\/\" rel=\"tag\">Parts<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/hy\/product\/magnet-stand\/\" title=\"Magnetic Stand Insize-60-kgf\">Magnetic Stand Insize-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">&euro;<\/span>46.00<\/span> + VAT (if applicable)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/hy\/wp-json\/wp\/v2\/glossary\/274?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Add to cart\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Add to cart\" class=\"fas fa-cart-plus\" 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class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p><strong>Torsional analysis<\/strong> is the measurement, evaluation, and modelling of <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/torsional-vibration\/\">torsional vibration<\/a> \u2014 twisting oscillations about the shaft axis \u2014 in the drive trains of rotating machinery. Unlike <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/lateral-vibration\/\">lateral vibration<\/a> (bending), which is read directly by standard <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/accelerometer\/\">accelerometers<\/a> bolted to a bearing housing, torsional motion produces no sideways displacement at all and is therefore invisible to ordinary <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/vibration-analysis\/\">vibration analysis<\/a>. Detecting it demands specialised techniques \u2014 strain gauges, dual tachometers, or laser <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/laser-vibrometry\/\">vibrometry<\/a> \u2014 together with analysis to find torsional natural frequencies and assess <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/fatigue\/\">fatigue<\/a> risk in shafts, couplings, and gears.<\/p>\n<p>The discipline is critical for reciprocating-engine drives, long drive shafts, high-power gearboxes, and variable-frequency-drive (VFD) motor systems, where torsional vibration can cause sudden, catastrophic shaft or coupling failure even when lateral <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/vibration-severity\/\">vibration severity<\/a> looks perfectly acceptable. It is a specialised but essential capability for preventing the kind of unexpected breakage that ordinary monitoring never sees coming.<\/p>\n<h2>1. Why Torsional Analysis Is Needed<\/h2>\n<h3>Torsional versus Lateral Vibration<\/h3>\n<p>The two motions are mechanically independent, and that independence is the whole reason a separate discipline exists:<\/p>\n<ul>\n<li><strong>Lateral:<\/strong> bending, side-to-side motion of the shaft and bearings \u2014 easily captured with a standard accelerometer or <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/proximity-probe\/\">proximity probe<\/a>.<\/li>\n<li><strong>Torsional:<\/strong> twisting about the rotational axis, with no lateral displacement to detect, leaving it invisible to conventionally mounted sensors.<\/li>\n<li><strong>Independence:<\/strong> a machine can suffer severe torsional vibration while showing low lateral levels, and vice versa \u2014 the two do not track one another.<\/li>\n<li><strong>Damage:<\/strong> torsional vibration can fracture shafts and couplings with no warning whatsoever from lateral measurements, which is precisely why it is so dangerous.<\/li>\n<\/ul>\n<h3>Characteristic Failure Modes<\/h3>\n<p>Because torsional excitation imposes cyclic shear stress on the drive line, its failures have a recognisable signature:<\/p>\n<ul>\n<li><strong>Shaft fatigue fractures:<\/strong> typically a clean break oriented at roughly 45\u00b0 to the shaft axis, the plane of maximum shear stress.<\/li>\n<li><strong>Coupling element failure:<\/strong> cracked gear teeth in gear couplings, or torn flexible elements in elastomeric and disc couplings.<\/li>\n<li><strong>Gear tooth breakage:<\/strong> driven by oscillating, reversing tooth loads rather than steady torque.<\/li>\n<li><strong>Key and keyway damage:<\/strong> fretting and loosening as the joint is worked back and forth by the alternating twist.<\/li>\n<\/ul>\n<h2>2. Measurement Techniques<\/h2>\n<p>Because there is no convenient surface to point a sensor at, four practical methods have emerged, trading accuracy against cost and frequency range.<\/p>\n<h3>Strain Gauge Method<\/h3>\n<p>The most direct route \u2014 measuring torsional stress at its source:<\/p>\n<ul>\n<li>Strain gauges are bonded at 45\u00b0 to the shaft axis, the orientation that captures maximum shear stress.<\/li>\n<li>They read the shear strain produced by twisting, which converts directly to torque and alternating stress.<\/li>\n<li>A rotating shaft demands either slip rings or wireless <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/telemetry\/\">telemetry<\/a> to get the signal off the spinning member.<\/li>\n<li>It is the most accurate method, but also the most complex and expensive, so it lives mostly in research and development work.<\/li>\n<\/ul>\n<h3>Dual Tachometer Method<\/h3>\n<ul>\n<li>Two optical sensors \u2014 typically two <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/laser-tachometer\/\">laser tachometers<\/a> \u2014 are aimed at different axial locations on the shaft.<\/li>\n<li>The instrument measures the instantaneous <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/phase\/\">phase<\/a> difference between the two stations.<\/li>\n<li>That phase difference is the angular twist of the shaft between them, which is the torsional vibration itself.<\/li>\n<li>It is non-contact and genuinely practical in the field, but usually limited to low-frequency torsional content, below roughly 100 Hz.<\/li>\n<\/ul>\n<h3>Laser Torsional Vibrometer<\/h3>\n<ul>\n<li>A specialised laser Doppler system aimed at the shaft surface.<\/li>\n<li>It measures angular-velocity fluctuations directly, with no shaft preparation.<\/li>\n<li>Non-contact, with a wide usable frequency range.<\/li>\n<li>Powerful, but expensive instrumentation reserved for demanding investigations.<\/li>\n<\/ul>\n<h3>Motor Current Analysis<\/h3>\n<ul>\n<li>Torsional vibration of a motor-driven train modulates the load and therefore creates small fluctuations in the motor current.<\/li>\n<li>Analysing the motor-current <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/spectrum\/\">spectrum<\/a> reveals those fluctuations indirectly.<\/li>\n<li>It is fully non-invasive \u2014 no sensor goes near the shaft at all.<\/li>\n<li>Best treated as a screening tool that flags a problem worth confirming with a direct method.<\/li>\n<\/ul>\n<h2>3. Analytical Torsional Analysis<\/h2>\n<p>Measurement tells you what a machine is doing now; modelling tells you what it will do across its whole speed range, and lets engineers design the problem out before metal is cut.<\/p>\n<h3>Mathematical Modelling<\/h3>\n<ul>\n<li>The drive train is reduced to a lumped-mass torsional model \u2014 discs of inertia connected by torsional springs (the shaft sections and couplings).<\/li>\n<li>From it, the torsional natural frequencies are calculated.<\/li>\n<li>The model predicts the response to each excitation source and identifies torsional <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/critical-speed\/\">critical speeds<\/a> and <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/resonance\/\">resonances<\/a>.<\/li>\n<\/ul>\n<h3>Excitation Sources<\/h3>\n<p>Torsional resonances only become dangerous when something drives them at the right frequency. The usual culprits are:<\/p>\n<ul>\n<li><strong>Reciprocating engines:<\/strong> firing pulses from each cylinder create strong torsional excitation at engine orders.<\/li>\n<li><strong>Gear mesh:<\/strong> tooth engagement produces an oscillating torque at the <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/gear-mesh-frequency\/\">gear mesh frequency<\/a>.<\/li>\n<li><strong>VFDs:<\/strong> PWM switching produces harmonics that can land on a torsional mode.<\/li>\n<li><strong>Electrical:<\/strong> motor <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/pole-pass-frequency\/\">pole-passing<\/a> and <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/slip-frequency\/\">slip frequencies<\/a> add further torsional forcing.<\/li>\n<\/ul>\n<h3>The Campbell Diagram for Torsion<\/h3>\n<p>The standard graphical tool for tying frequencies to speed is the <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/campbell-diagram\/\">Campbell diagram<\/a>:<\/p>\n<ul>\n<li>Torsional natural frequencies are plotted against running speed.<\/li>\n<li>Excitation order lines (1\u00d7, 2\u00d7, firing order, mesh order) are overlaid.<\/li>\n<li>Where an order line crosses a natural frequency, a torsional critical speed exists \u2014 an interference point to be avoided.<\/li>\n<li>The picture then guides the choice of operating speeds and any restricted bands. You can sketch the same interference map for a given drive line with the <a href=\"https:\/\/vibromera.eu\/hy\/calculators\/campbell-diagram-calculator\/\">Campbell Diagram Calculator<\/a>.<\/li>\n<\/ul>\n<h2>4. Critical Applications<\/h2>\n<p>Torsional analysis is not needed everywhere, but in a handful of machine families it is effectively mandatory.<\/p>\n<ul>\n<li><strong>Reciprocating-engine drives:<\/strong> diesel generator sets, gas-engine compressors, and marine propulsion, where large torque pulsations make analysis unavoidable.<\/li>\n<li><strong>Long drive shafts:<\/strong> rolling-mill drives, marine propeller shafts, and paper-machine drives, where sheer length lowers torsional stiffness and drops natural frequencies into the operating range.<\/li>\n<li><strong>High-power gearboxes:<\/strong> wind-turbine gearboxes and industrial reducers above about 1,000 HP, where gear-mesh excitation can ring a torsional mode.<\/li>\n<li><strong>VFD motor systems:<\/strong> a fast-growing concern as drives proliferate, because PWM harmonics can excite torsional resonances that a fixed-speed motor never would.<\/li>\n<\/ul>\n<h2>5. Interpreting the Results<\/h2>\n<p>A torsional study produces three deliverables that together decide whether a drive train is safe to run.<\/p>\n<h3>Torsional Natural Frequencies<\/h3>\n<ul>\n<li>Identified from measurement, calculation, or both.<\/li>\n<li>Compared against every credible excitation frequency.<\/li>\n<li>Checked for adequate separation \u2014 a comfortable margin between mode and forcing frequency across the operating range.<\/li>\n<\/ul>\n<h3>Stress Levels<\/h3>\n<ul>\n<li>Alternating shear stress is calculated from the measured torsional amplitude.<\/li>\n<li>It is compared with the material&#8217;s endurance (fatigue) limit.<\/li>\n<li>The fraction of fatigue life being consumed per hour or per start is estimated.<\/li>\n<li>A verdict follows: are the stresses acceptable for the required service life?<\/li>\n<\/ul>\n<h3>Damping<\/h3>\n<ul>\n<li>Measured from the sharpness of the response at each torsional resonance.<\/li>\n<li>Torsional <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/damping\/\">damping<\/a> is typically very low \u2014 often under 1% of critical.<\/li>\n<li>Low damping means tall, narrow resonance peaks and large amplification if an excitation order coincides with a mode.<\/li>\n<\/ul>\n<h2>6. Mitigation Strategies<\/h2>\n<p>When analysis flags a problem, three levers are available, and they are usually applied in this order of preference.<\/p>\n<h3>Frequency Separation<\/h3>\n<ul>\n<li>Move the torsional naturals clear of every excitation frequency.<\/li>\n<li>Adjust shaft diameter or length, or change coupling torsional <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/stiffness\/\">stiffness<\/a>, to retune the modes.<\/li>\n<li>Alter inertias \u2014 for example by adding a flywheel \u2014 to shift natural frequencies.<\/li>\n<\/ul>\n<h3>Adding Damping<\/h3>\n<ul>\n<li>Fit a torsional damper (viscous or friction type) to bleed energy from the resonance.<\/li>\n<li>Specify high-damping flexible couplings in place of stiff ones.<\/li>\n<li>Both reduce the amplification at resonance even when perfect separation is impossible.<\/li>\n<\/ul>\n<h3>Operating-Speed Changes<\/h3>\n<ul>\n<li>Avoid continuous running at identified torsional critical speeds.<\/li>\n<li>Define and enforce restricted speed bands the machine passes through quickly.<\/li>\n<li>On a VFD, tune the drive to minimise excitation at the troublesome harmonics.<\/li>\n<\/ul>\n<h2>7. Torsional Analysis Within a Field Programme<\/h2>\n<p>Torsional work is specialised, but it does not stand alone \u2014 it sits alongside the routine balancing and lateral-vibration checks that keep a drive train healthy, and a clean lateral picture is the baseline against which a torsional anomaly stands out. In day-to-day field practice an engineer first confirms that the rotor itself is well balanced and that 1\u00d7 <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/unbalance\/\">unbalance<\/a> is under control, because residual unbalance and <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/misalignment\/\">misalignment<\/a> add their own torque variation to the line. A portable two-channel instrument such as the <a href=\"https:\/\/vibromera.eu\/hy\/product\/balanset-1\/\">Balanset-1A<\/a> handles that lateral side on-site \u2014 measuring 1\u00d7 amplitude and phase, balancing the rotor in its own bearings, and verifying <a href=\"https:\/\/vibromera.eu\/hy\/glossary\/residual-unbalance\/\">residual unbalance<\/a> \u2014 so that any remaining twisting energy can be attributed cleanly to true torsional sources rather than to a lateral fault masquerading as one. With the rotor balanced and aligned, a dedicated torsional measurement (dual tachometer or strain gauge) can then isolate the real torsional behaviour.<\/p>\n<p>In short, torsional analysis is a specialised vibration discipline aimed at twisting oscillations that can cause catastrophic failures invisible to standard lateral monitoring. Though it demands purpose-built measurement and modelling, it is indispensable for reciprocating-engine drives, long shafts, high-power gearboxes, and VFD systems, where torsional vibration carries real reliability and safety risk.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/hy\/glossary\/\">\u2190 Back to Main Index<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Learn about torsional analysis, measuring and evaluating twisting oscillations in shafts and drive trains to prevent fatigue failures in couplings, gears, and shafts.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[114,109],"tags":[],"class_list":["post-274","glossary","type-glossary","status-publish","hentry","category-analysis","category-glossary"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/glossary\/274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/glossary\/274\/revisions"}],"predecessor-version":[{"id":101315,"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/glossary\/274\/revisions\/101315"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/media?parent=274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/categories?post=274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/hy\/wp-json\/wp\/v2\/tags?post=274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}