{"id":20650,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/rotor-eccentricity\/"},"modified":"2026-07-03T09:55:02","modified_gmt":"2026-07-03T09:55:02","slug":"rotor-eccentricity","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/ca\/glossary\/rotor-eccentricity\/","title":{"rendered":"What is Rotor Eccentricity? Geometric Imbalance"},"content":{"rendered":"<h1>Understanding Rotor Eccentricity<\/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\/ca\/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\/ca\/product\/balanset-1\/\" title=\"Portable balancer &amp; 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\/ca\/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\/ca\/product\/balanset-1\/\" title=\"Portable balancer &amp; Vibration analyzer Balanset-1A\">Portable balancer &amp; 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\">\u20ac<\/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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Afegeix a la cistella\" 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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d s&#039;ha afegit a la vostra cistella\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Afegeix a la cistella<\/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\/ca\/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\/ca\/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\/ca\/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\/ca\/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\">\u20ac<\/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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Afegeix a la cistella\" 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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d s&#039;ha afegit a la vostra cistella\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Afegeix a la cistella<\/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\/ca\/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\/ca\/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\/ca\/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\/ca\/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\">\u20ac<\/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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Afegeix a la cistella\" 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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d s&#039;ha afegit a la vostra cistella\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Afegeix a la cistella<\/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\/ca\/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\/ca\/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\/ca\/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\/ca\/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\">\u20ac<\/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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Afegeix a la cistella\" 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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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=\"Afegeix a la cistella: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d s&#039;ha afegit a la vostra cistella\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Afegeix a la cistella<\/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\/ca\/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\/ca\/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\/ca\/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\/ca\/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\">\u20ac<\/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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?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\" 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loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Balanset-1A kit contents with interface unit, sensors, tachometer and accessories\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1024x683.webp 1024w, 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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\/ca\/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\/ca\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamic balancer \u201cBalanset-1A\u201d OEM\">Dynamic balancer \u201cBalanset-1A\u201d OEM<\/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\">\u20ac<\/span>1,735.00<\/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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?add-to-cart=4193\" data-quantity=\"1\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Afegeix a la cistella\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Afegeix a la cistella\" 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=\"\/ca\/wp-json\/wp\/v2\/glossary\/20650?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"Afegeix a la cistella: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d s&#039;ha afegit a la vostra cistella\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Afegeix a la cistella<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" 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>Rotor eccentricity<\/strong> \u2014 also called <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/eccentricity\/\">eccentricity<\/a> or geometric runout \u2014 is a condition in which the geometric centre of a <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/rotor\/\">rotor<\/a> or rotor component does not coincide with the axis of rotation defined by the supporting bearings. This offset means that, even when the mass is perfectly distributed, the rotor&#8217;s outer surface runs &#8220;off-centre,&#8221; forcing the centre of mass to orbit the rotation axis as the rotor spins and generating <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/vibration\/\">vibration<\/a> that looks, in the spectrum, identical to mass <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/unbalance\/\">unbalance<\/a>. Eccentricity is especially common in electric motors (rotor-to-bore offset), in pumps and fans (impeller mounting offset), and in any assembled rotor where stacked manufacturing tolerances accumulate into geometric runout. It is a significant concern in precision machinery, where tight concentricity is essential.<\/p>\n<h2>1. Definition and Why It Mimics Unbalance<\/h2>\n<p>The defining feature of eccentricity is that it is a <em>geometric<\/em> defect with <em>dynamic<\/em> consequences. A perfectly balanced disc whose bore is offset from its outer rim will still throw its mass centre into an orbit once it spins, and the resulting once-per-revolution force is indistinguishable, on a single spectrum line, from genuine unbalance. This is what makes eccentricity such a frequent source of confusion on the shop floor: the cure for unbalance \u2014 adding weights \u2014 only partly helps, because the underlying geometry has not changed. Distinguishing the two correctly is the key to choosing the right repair.<\/p>\n<h2>2. Types of Rotor Eccentricity<\/h2>\n<h3>1. Static eccentricity (parallel offset)<\/h3>\n<ul>\n<li><strong>Description:<\/strong> the rotor centre is offset from the rotational axis but remains parallel to it.<\/li>\n<li><strong>Geometry:<\/strong> a constant radial offset along the rotor length.<\/li>\n<li><strong>Effect:<\/strong> creates effective mass unbalance, since the geometric centre no longer equals the rotational centre.<\/li>\n<li><strong>Common in:<\/strong> single-disc components such as impellers and pulleys.<\/li>\n<li><strong>Correction:<\/strong> often correctable by <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/balancing\/\">equilibri<\/a> or remounting.<\/li>\n<\/ul>\n<h3>2. Dynamic eccentricity (angular offset)<\/h3>\n<ul>\n<li><strong>Description:<\/strong> the rotor centreline lies at an angle to the rotation axis.<\/li>\n<li><strong>Geometry:<\/strong> runout that varies along the rotor length.<\/li>\n<li><strong>Effect:<\/strong> creates <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/couple-unbalance\/\">couple unbalance<\/a> and a varying runout.<\/li>\n<li><strong>Common in:<\/strong> long rotors built up over multiple assembly stages.<\/li>\n<li><strong>Correction:<\/strong> requires realignment or specialised balancing.<\/li>\n<\/ul>\n<h3>3. Compound eccentricity<\/h3>\n<ul>\n<li>A combination of parallel and angular offset.<\/li>\n<li>The most common real-world condition.<\/li>\n<li>Produces a complex runout pattern.<\/li>\n<li>Requires careful analysis to separate it from other faults such as a <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/bent-shaft\/\">bent shaft<\/a>.<\/li>\n<\/ul>\n<h2>3. Common Causes<\/h2>\n<h3>Manufacturing tolerances<\/h3>\n<ul>\n<li><strong>Bore runout:<\/strong> a bearing bore not concentric with the outer diameter.<\/li>\n<li><strong>Shaft runout:<\/strong> machining inaccuracies in the shaft journals.<\/li>\n<li><strong>Stack-up:<\/strong> several components assembled so their tolerances accumulate.<\/li>\n<li><strong>Casting variations:<\/strong> core shift producing uneven wall thickness.<\/li>\n<\/ul>\n<h3>Assembly errors<\/h3>\n<ul>\n<li><strong>Off-centre mounting:<\/strong> an impeller or rotor component not centred on the shaft.<\/li>\n<li><strong>Cocked installation:<\/strong> a component tilted during press-fitting.<\/li>\n<li><strong>Key\/keyway issues:<\/strong> an oversized keyway or an eccentrically installed key.<\/li>\n<li><strong>Thermal-fit problems:<\/strong> shrink- or expansion-fit assembly that introduces an offset.<\/li>\n<\/ul>\n<h3>Operational causes<\/h3>\n<ul>\n<li><strong>Bearing wear:<\/strong> excessive <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/bearing-clearance\/\">clearance<\/a> lets the shaft run off-centre.<\/li>\n<li><strong>Shaft bending:<\/strong> a permanent or <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/thermal-bow\/\">thermal bow<\/a> that creates effective eccentricity.<\/li>\n<li><strong>Plastic deformation:<\/strong> overload causing permanent distortion of the shaft or a component.<\/li>\n<li><strong>Looseness:<\/strong> a component worked loose and shifted out of position.<\/li>\n<\/ul>\n<h2>4. Effects and Symptoms<\/h2>\n<h3>Vibration symptoms<\/h3>\n<ul>\n<li><strong>1\u00d7 synchronous vibration:<\/strong> the primary symptom, appearing identical to mass unbalance.<\/li>\n<li><strong>High <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/run-out\/\">runout<\/a>:<\/strong> measurable radial runout even at slow-roll speeds.<\/li>\n<li><strong>Constant phase:<\/strong> unlike some faults, the <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/phase\/\">phase<\/a> is typically stable.<\/li>\n<li><strong>Speed-squared response:<\/strong> vibration grows with the square of speed, exactly as unbalance does \u2014 a hallmark of <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/centrifugal-force\/\">centrifugal force<\/a> driving the response.<\/li>\n<\/ul>\n<h3>Electrical effects (motors and generators)<\/h3>\n<ul>\n<li><strong>Air-gap variation:<\/strong> an eccentric rotor creates a non-uniform <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/air-gap\/\">air gap<\/a>.<\/li>\n<li><strong>Unbalanced magnetic pull (UMP):<\/strong> asymmetric magnetic forces, driven by <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/magnetic-pull\/\">magnetic pull<\/a>.<\/li>\n<li><strong>Current fluctuations:<\/strong> varying reluctance affects current draw.<\/li>\n<li><strong>Overheating:<\/strong> localised heating at the minimum air-gap position.<\/li>\n<li><strong>Electromagnetic noise:<\/strong> vibration and hum at line-related frequencies \u2014 often at twice line frequency, with pole-pass sidebands when the eccentricity rotates with the shaft.<\/li>\n<\/ul>\n<h3>Mechanical stress<\/h3>\n<ul>\n<li>Increased bearing loads from the unbalance-like forces.<\/li>\n<li>Cyclic bending stress in the shaft.<\/li>\n<li>Reduced clearance at the minimum-gap locations.<\/li>\n<li>A risk of <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/rotor-rub\/\">rubs<\/a> where clearances are tightest.<\/li>\n<\/ul>\n<h2>5. Diagnosis and Differentiation<\/h2>\n<h3>Eccentricity versus mass unbalance<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Feature<\/th>\n<th>Mass unbalance<\/th>\n<th>Eccentricity<\/th>\n<\/tr>\n<tr>\n<td>Vibration frequency<\/td>\n<td>1\u00d7 running speed<\/td>\n<td>1\u00d7 running speed<\/td>\n<\/tr>\n<tr>\n<td>Slow-roll runout<\/td>\n<td>Minimal<\/td>\n<td>High (proportional to eccentricity)<\/td>\n<\/tr>\n<tr>\n<td>Response to balancing<\/td>\n<td>Vibration reduced<\/td>\n<td>Limited improvement (adds mass unbalance to compensate)<\/td>\n<\/tr>\n<tr>\n<td>Electrical effects<\/td>\n<td>None<\/td>\n<td>Air-gap variation, UMP (in motors\/generators)<\/td>\n<\/tr>\n<tr>\n<td>Correction<\/td>\n<td>Add balance weights<\/td>\n<td>Remount component, replace if a manufacturing defect<\/td>\n<\/tr>\n<\/table>\n<p>The single most useful discriminator is slow-roll runout: pure mass unbalance produces almost none, whereas eccentricity shows high runout even at a crawl. This is why a careful runout check is the first step whenever a 1\u00d7 problem refuses to balance out.<\/p>\n<h3>Diagnostic tests<\/h3>\n<h4>Runout measurement<\/h4>\n<ul>\n<li>Measure radial runout with a dial indicator or a <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/proximity-probe\/\">proximity probe<\/a>.<\/li>\n<li>Rotate the shaft slowly (&lt; 100 RPM).<\/li>\n<li>High runout \u2014 typically &gt; 0.05 mm (about 2 mils) \u2014 indicates eccentricity or a bent shaft.<\/li>\n<li>Runout that persists when the shaft is barely turning confirms a geometric, not a dynamic, issue.<\/li>\n<\/ul>\n<h4>Balancing-response test<\/h4>\n<ul>\n<li>Attempt balancing with <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/trial-weight\/\">trial weights<\/a>.<\/li>\n<li>Eccentricity limits the achievable balance quality.<\/li>\n<li>Acceptable vibration may be reached, but only with unusually large correction weights.<\/li>\n<li>Those weights &#8220;chase&#8221; the geometric offset rather than correcting a genuine mass distribution, leaving a high <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/residual-unbalance\/\">residual unbalance<\/a> mechanism in place.<\/li>\n<\/ul>\n<h2>6. Correction Methods<\/h2>\n<h3>Mechanical correction<\/h3>\n<ul>\n<li><strong>Remount the component:<\/strong> remove and reinstall it with better concentricity.<\/li>\n<li><strong>Machine the surfaces:<\/strong> re-bore bearing fits or remachine the shaft to improve runout.<\/li>\n<li><strong>Replace the component:<\/strong> where the fault is a manufacturing defect, replacement may be the only option.<\/li>\n<li><strong>Shim adjustment:<\/strong> reposition assembled components with shims.<\/li>\n<\/ul>\n<h3>Balancing compensation<\/h3>\n<ul>\n<li>Add balance weights to create a counteracting unbalance.<\/li>\n<li>This reduces vibration but does not fix the geometry.<\/li>\n<li>It is acceptable when the eccentricity is within tolerance and vibration is reduced adequately.<\/li>\n<li>For precision applications, the limitation should be formally documented.<\/li>\n<\/ul>\n<h3>For electric motors and generators<\/h3>\n<ul>\n<li>Reposition the rotor to minimise air-gap variation.<\/li>\n<li>In severe cases, re-boring the stator or full replacement is required.<\/li>\n<li>Electromagnetic compensation is sometimes possible with advanced drive controls.<\/li>\n<\/ul>\n<p>In the field, the practical question is usually &#8220;can I balance this out, or is it geometric?&#8221; A portable two-channel analyser such as the <a href=\"https:\/\/vibromera.eu\/ca\/producte\/balanset-1\/\">Balanset-1A<\/a> answers it efficiently: by measuring the 1\u00d7 amplitude and phase before and after a trial weight, it reveals how the rotor actually responds to added mass, while the same setup confirms whether large, &#8220;chasing&#8221; correction weights are needed \u2014 the tell-tale signature that eccentricity, not simple unbalance, is the root cause. Used alongside a slow-roll runout check, it lets an engineer decide between balancing compensation and a mechanical fix with confidence. Where the offset turns out to be true geometric <a href=\"https:\/\/vibromera.eu\/ca\/glossary\/misalignment\/\">misalignment<\/a> of an assembled rotor, realignment rather than weights is the answer.<\/p>\n<p>Rotor eccentricity is a geometric imperfection with dynamic consequences that closely mimic mass unbalance, yet it carries distinct diagnostic fingerprints \u2014 persistent slow-roll runout, stable phase, and, in machines, air-gap effects. Recognising it through runout measurement and understanding why balancing alone cannot fully cure it leads to the correct response: mechanical correction where feasible, or documented acceptance with balance compensation where geometric modification is impractical.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/ca\/glossary\/\">\u2190 Back to Main Index<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Learn about rotor eccentricity, the offset between geometric and rotational centers causing vibration similar to unbalance, common in motors, generators, and impellers.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-20650","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/glossary\/20650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/glossary\/20650\/revisions"}],"predecessor-version":[{"id":102160,"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/glossary\/20650\/revisions\/102160"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/media?parent=20650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/categories?post=20650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/ca\/wp-json\/wp\/v2\/tags?post=20650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}