{"id":160,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/magnetic-pull\/"},"modified":"2026-07-03T09:54:32","modified_gmt":"2026-07-03T09:54:32","slug":"magnetic-pull","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/yo\/glossary\/magnetic-pull\/","title":{"rendered":"What is Magnetic Pull? Unbalanced Magnetic Force in Motors"},"content":{"rendered":"<h1>Understanding Magnetic Pull in Electric Motors<\/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\/yo\/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\/yo\/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\/yo\/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\/yo\/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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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\/yo\/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\/yo\/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\/yo\/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\/yo\/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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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\/yo\/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\/yo\/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\/yo\/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\/yo\/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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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\/yo\/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\/yo\/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\/yo\/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\/yo\/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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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\/yo\/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\/yo\/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\/yo\/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\/yo\/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=\"\/yo\/wp-json\/wp\/v2\/glossary\/160?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>Magnetic pull<\/strong> \u2014 also called unbalanced magnetic pull, or UMP \u2014 is a net radial electromagnetic force that develops in electric motors and generators when the <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/air-gap\/\">air gap<\/a> between rotor and stator is not uniform. When the rotor sits off-centre in the stator bore, the gap narrows on one side and widens on the other. Because magnetic attraction varies inversely with the square of the gap, the force on the narrow-gap side is far stronger, producing a net pull that drags the rotor toward that side. The result is a coupling between mechanical <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/eccentricity\/\">eccentricity<\/a> and electromagnetic force that, left unchecked, can feed on itself.<\/p>\n<p>Magnetic pull typically generates <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/vibration\/\">vibration<\/a> at line-related frequencies \u2014 most characteristically at twice the electrical line frequency (120 Hz on 60 Hz supplies, 100 Hz on 50 Hz supplies) when the eccentricity is static \u2014 can deflect the rotor significantly, accelerates <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/bearing-wear\/\">bearing wear<\/a>, and in severe cases ends in catastrophic rotor-to-stator contact. Understanding it is central to diagnosing <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/motor-defects\/\">motor faults<\/a> correctly.<\/p>\n<h2>1. Physical Mechanism<\/h2>\n<h3>Uniform air gap (normal condition)<\/h3>\n<ul>\n<li>Rotor centred in the stator bore.<\/li>\n<li>Air gap equal around the full circumference (typically 0.3\u20131.5 mm).<\/li>\n<li>Magnetic forces on opposite sides balance and cancel.<\/li>\n<li>Net radial force \u2248 zero.<\/li>\n<li>Minimal electromagnetic vibration.<\/li>\n<\/ul>\n<h3>Eccentric air gap (UMP condition)<\/h3>\n<p>When the rotor runs off-centre:<\/p>\n<ol>\n<li><strong>Gap asymmetry:<\/strong> one side narrows (e.g. 0.5 mm) while the opposite side widens (e.g. 1.0 mm).<\/li>\n<li><strong>Inverse-square law:<\/strong> magnetic force \u221d 1\/gap\u00b2, so the force on the narrow side is much greater.<\/li>\n<li><strong>Net force:<\/strong> the unbalanced forces no longer cancel, leaving a net pull toward the narrow-gap side.<\/li>\n<li><strong>Magnitude:<\/strong> can reach hundreds to thousands of pounds even in moderately sized motors.<\/li>\n<li><strong>Direction:<\/strong> always toward the side with the smallest gap.<\/li>\n<\/ol>\n<h3>Why twice the line frequency?<\/h3>\n<p>A strong 2\u00d7 line-frequency component is the classic signature of UMP caused by a fixed (static) eccentricity:<\/p>\n<ul>\n<li>A balanced three-phase supply produces a rotating magnetic field of essentially constant magnitude \u2014 the field itself does not simply pulsate.<\/li>\n<li>However, the radial magnetic (Maxwell) force at any fixed point on the stator is proportional to the local flux density squared (B\u00b2); because the flux density at that point alternates at line frequency, the local radial force pulsates at 2\u00d7 line frequency.<\/li>\n<li>With a uniform gap those force pulsations are symmetric around the bore and largely cancel; a static eccentricity breaks the symmetry, leaving a net pulsating force \u2014 and vibration \u2014 at 2\u00d7f.<\/li>\n<li>60 Hz motor \u2192 120 Hz vibration; 50 Hz motor \u2192 100 Hz vibration.<\/li>\n<li>Dynamic eccentricity (the narrow gap rotating with the shaft) behaves differently: it shows up mainly at 1\u00d7 running speed with <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/pole-pass-frequency\/\">pole-pass frequency<\/a> sidebands rather than as a clean 2\u00d7f peak.<\/li>\n<\/ul>\n<p>No single peak is proof on its own. Magnetic saturation, stator slotting and supply-voltage imbalance can also raise line-related components, so an elevated 2\u00d7f peak should be confirmed with current, load\/no-load and air-gap checks before UMP is declared.<\/p>\n<p>This places UMP firmly in the family of <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/electrical-faults\/\">electrical faults<\/a>, distinct from purely mechanical sources even when the symptom \u2014 a strong 2\u00d7 peak \u2014 looks similar at first glance.<\/p>\n<h2>2. Causes of Unbalanced Magnetic Pull<\/h2>\n<h3>Bearing wear<\/h3>\n<ul>\n<li>The most common cause of developing UMP.<\/li>\n<li>Bearing clearance lets the rotor run off-centre.<\/li>\n<li>Gravity pulls the rotor down, reducing the bottom air gap.<\/li>\n<li>UMP then drags the rotor further off-centre.<\/li>\n<li>Positive feedback: the UMP accelerates the very bearing wear that caused it.<\/li>\n<\/ul>\n<h3>Manufacturing tolerances<\/h3>\n<ul>\n<li><strong>Rotor eccentricity:<\/strong> rotor not perfectly round, or not centred on its shaft.<\/li>\n<li><strong>Stator-bore eccentricity:<\/strong> bore not concentric with the mounting surfaces.<\/li>\n<li><strong>Assembly errors:<\/strong> end bells misaligned, or the rotor cocked during assembly.<\/li>\n<li><strong>Tolerance stack-up:<\/strong> an accumulation of small errors adding up to measurable eccentricity.<\/li>\n<\/ul>\n<h3>Operational causes<\/h3>\n<ul>\n<li><strong>Thermal growth:<\/strong> differential expansion disturbing gap uniformity.<\/li>\n<li><strong>Frame distortion:<\/strong> <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/soft-foot\/\">soft foot<\/a> or mounting stress warping the frame.<\/li>\n<li><strong>Shaft deflection:<\/strong> load or coupling forces bending the shaft.<\/li>\n<li><strong>Foundation issues:<\/strong> settling or deterioration shifting the motor&#8217;s position.<\/li>\n<\/ul>\n<h2>3. Effects and Consequences<\/h2>\n<h3>Direct effects<\/h3>\n<ul>\n<li><strong>Radial force on the rotor:<\/strong> a continuous pull toward one side.<\/li>\n<li><strong>Bearing overload:<\/strong> one bearing carries the extra magnetic load.<\/li>\n<li><strong>Vibration at 2\u00d7f:<\/strong> an elevated electromagnetic component.<\/li>\n<li><strong>Shaft deflection:<\/strong> the magnetic force bends the shaft, worsening the eccentricity.<\/li>\n<\/ul>\n<h3>Progressive failure mechanism<\/h3>\n<p>UMP can drive a self-reinforcing failure cycle:<\/p>\n<ol>\n<li>Initial eccentricity (from bearing wear or manufacture).<\/li>\n<li>Magnetic pull develops toward the narrow-gap side.<\/li>\n<li>The force deflects the rotor further, narrowing the gap more.<\/li>\n<li>The smaller gap produces stronger pull.<\/li>\n<li>Bearing wear accelerates on the loaded side.<\/li>\n<li>Eccentricity and pull keep rising.<\/li>\n<li>Eventual rotor-stator contact and catastrophic failure.<\/li>\n<\/ol>\n<h3>Secondary damage<\/h3>\n<ul>\n<li>Accelerated bearing failure from asymmetric loading.<\/li>\n<li>Possible <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/rotor-rub\/\">rotor-stator rubs<\/a> damaging both components.<\/li>\n<li>Shaft bending or a permanent <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/shaft-bow\/\">bow<\/a>.<\/li>\n<li>Stator-winding damage from rotor strikes.<\/li>\n<li>Efficiency loss from a non-optimal air gap.<\/li>\n<\/ul>\n<h2>4. Detection and Diagnosis<\/h2>\n<h3>Vibration signature<\/h3>\n<ul>\n<li><strong>Primary indicator:<\/strong> elevated 2\u00d7 line frequency (120 Hz or 100 Hz).<\/li>\n<li><strong>Typical pattern:<\/strong> the 2\u00d7f amplitude exceeds 30\u201350% of the 1\u00d7 <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/running-speed\/\">running-speed<\/a> vibration.<\/li>\n<li><strong>Confirmation:<\/strong> the 2\u00d7f component is not proportional to mechanical unbalance.<\/li>\n<li><strong>Load independence:<\/strong> the 2\u00d7f amplitude stays relatively constant with load, unlike mechanical sources.<\/li>\n<\/ul>\n<p>Reading these peaks correctly first requires a precise frequency axis. A clear <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/spectrum\/\">spectrum<\/a>, resolved with an <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/fft\/\">FFT<\/a> and anchored to running speed, is what lets you separate a 2\u00d7 <em>line<\/em>-frequency peak from a 2\u00d7 <em>running<\/em>-speed peak \u2014 the single most important distinction in this diagnosis.<\/p>\n<h3>Distinguishing UMP from other 2\u00d7 sources<\/h3>\n<table border=\"1\" style=\"width:100%; border-collapse:collapse;\">\n<tr>\n<th>Source<\/th>\n<th>Characteristics<\/th>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/vibromera.eu\/yo\/glossary\/misalignment\/\">Misalignment<\/a><\/td>\n<td>2\u00d7 running speed (not 2\u00d7 line frequency); high axial vibration<\/td>\n<\/tr>\n<tr>\n<td>Magnetic pull<\/td>\n<td>2\u00d7 line frequency (120\/100 Hz); electromagnetic origin<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/vibromera.eu\/yo\/glossary\/stator-defects\/\">Stator faults<\/a><\/td>\n<td>2\u00d7 line frequency; current imbalance present<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/vibromera.eu\/yo\/glossary\/frame-resonance\/\">Frame resonance<\/a><\/td>\n<td>2\u00d7 line frequency; frame vibration far exceeds bearing vibration<\/td>\n<\/tr>\n<\/table>\n<h3>Additional diagnostic tests<\/h3>\n<h4>Air-gap measurement<\/h4>\n<ul>\n<li>Measure the gap at several points around the circumference (requires motor disassembly).<\/li>\n<li>Eccentricity greater than 10% of the average gap indicates a problem.<\/li>\n<li>Document the minimum and maximum gap values.<\/li>\n<\/ul>\n<h4>Current analysis<\/h4>\n<ul>\n<li>Check the phase currents for balance.<\/li>\n<li>Current imbalance may accompany UMP.<\/li>\n<li>The current spectrum shows a 2\u00d7 line-frequency component.<\/li>\n<\/ul>\n<h4>No-load test<\/h4>\n<ul>\n<li>Run the motor uncoupled at no load.<\/li>\n<li>If the 2\u00d7f vibration stays high, the source is electromagnetic (UMP or a stator fault).<\/li>\n<li>If it drops sharply, the source is mechanical misalignment.<\/li>\n<\/ul>\n<p>This no-load test is the decisive field check: it cleanly separates an electromagnetic cause from a mechanical one and should be run before any invasive disassembly. A <a href=\"https:\/\/vibromera.eu\/yo\/calculators\/motor-electrical-frequencies\/\">motor electrical defect frequency calculator<\/a> helps confirm exactly where 2\u00d7f and related components should fall for a given supply and pole count.<\/p>\n<h2>5. Quantifying the Magnetic-Pull Force<\/h2>\n<h3>Approximate relationship<\/h3>\n<p>UMP force can be estimated from a simple proportionality:<\/p>\n<blockquote><p><strong>F \u221d (eccentricity \/ gap) \u00d7 motor power.<\/strong> Force grows roughly linearly with eccentricity, climbs sharply as the gap shrinks, and scales up with motor size.<\/p><\/blockquote>\n<h3>Typical magnitudes<\/h3>\n<ul>\n<li><strong>10 HP motor, 10% eccentricity:<\/strong> ~50\u2013100 lbf.<\/li>\n<li><strong>100 HP motor, 20% eccentricity:<\/strong> ~500\u20131,000 lbf.<\/li>\n<li><strong>1000 HP motor, 30% eccentricity:<\/strong> ~5,000\u201310,000 lbf.<\/li>\n<li><strong>Impact:<\/strong> forces of this scale heavily load bearings and can visibly deflect shafts.<\/li>\n<\/ul>\n<h2>6. Correction Methods<\/h2>\n<h3>For bearing-caused eccentricity<\/h3>\n<ul>\n<li>Replace worn bearings to restore proper rotor centring.<\/li>\n<li>Use tighter-tolerance bearings if eccentricity recurs.<\/li>\n<li>Verify the bearing selection is adequate for motor loads including UMP.<\/li>\n<li>Check the bearing fit on the shaft and in the end bells.<\/li>\n<\/ul>\n<h3>For manufacturing eccentricity<\/h3>\n<ul>\n<li><strong>Minor (&lt; 10%):<\/strong> accept and monitor if vibration is acceptable.<\/li>\n<li><strong>Moderate (10\u201325%):<\/strong> consider reboring the stator or machining the rotor.<\/li>\n<li><strong>Severe (&gt; 25%):<\/strong> motor replacement or major rework.<\/li>\n<li><strong>Warranty:<\/strong> manufacturing eccentricity may be a warranty claim on new motors.<\/li>\n<\/ul>\n<h3>For assembly and installation issues<\/h3>\n<ul>\n<li>Verify end-bell alignment and bolt torque.<\/li>\n<li>Correct any <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/soft-foot\/\">soft-foot<\/a> condition.<\/li>\n<li>Ensure the frame is not distorted by mounting stress.<\/li>\n<li>Check for pipe strain or coupling forces pulling the motor out of position.<\/li>\n<\/ul>\n<h2>7. Prevention Strategies<\/h2>\n<h3>Design and selection<\/h3>\n<ul>\n<li>Specify tight air-gap tolerances for critical applications.<\/li>\n<li>Choose quality motors from reputable manufacturers.<\/li>\n<li>Larger air gaps reduce UMP magnitude (at some cost to efficiency).<\/li>\n<li>Consider magnetic-bearing designs for extreme applications.<\/li>\n<\/ul>\n<h3>Installation<\/h3>\n<ul>\n<li>Align carefully during installation.<\/li>\n<li>Eliminate soft foot before final bolt-up.<\/li>\n<li>Check rotor axial position and float.<\/li>\n<li>Ensure end bells are properly aligned and torqued.<\/li>\n<\/ul>\n<h3>Maintenance<\/h3>\n<ul>\n<li>Replace bearings before wear becomes excessive.<\/li>\n<li>Monitor the 2\u00d7 line-frequency vibration trend over time.<\/li>\n<li>Verify <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/balancing\/\">balance<\/a> and alignment periodically.<\/li>\n<li>Keep the motor clean to prevent cooling blockages and the thermal distortion they cause.<\/li>\n<\/ul>\n<h2>8. Special Considerations<\/h2>\n<h3>Large motors<\/h3>\n<ul>\n<li>UMP forces can be enormous \u2014 tons of force.<\/li>\n<li>Bearing selection must account for UMP loads.<\/li>\n<li>Shaft-deflection calculations should include UMP.<\/li>\n<li>Air-gap monitoring may be built into large critical motors.<\/li>\n<\/ul>\n<h3>High-speed motors<\/h3>\n<ul>\n<li><a href=\"https:\/\/vibromera.eu\/yo\/glossary\/centrifugal-force\/\">Centrifugal forces<\/a> combine with UMP.<\/li>\n<li>Potential for instability if UMP is too large.<\/li>\n<li>Tight air-gap tolerances are critical.<\/li>\n<\/ul>\n<h3>Vertical motors<\/h3>\n<ul>\n<li>Gravity does not centre the rotor as it does in horizontal motors.<\/li>\n<li>UMP can pull the rotor toward any side.<\/li>\n<li>The <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/thrust-bearing\/\">thrust bearing<\/a> must carry the rotor weight plus any axial UMP component.<\/li>\n<\/ul>\n<h2>9. Relationship to Other Motor Issues<\/h2>\n<h3>UMP and rotor eccentricity<\/h3>\n<ul>\n<li><a href=\"https:\/\/vibromera.eu\/yo\/glossary\/rotor-eccentricity\/\">Eccentricity<\/a> causes UMP.<\/li>\n<li>UMP can worsen eccentricity (positive feedback).<\/li>\n<li>Both create vibration, but at different frequencies (1\u00d7 versus 2\u00d7f).<\/li>\n<\/ul>\n<h3>UMP and stator faults<\/h3>\n<ul>\n<li>Both produce 2\u00d7 line-frequency vibration.<\/li>\n<li>Stator faults additionally show current imbalance.<\/li>\n<li>UMP arises from eccentricity without current imbalance.<\/li>\n<li>The two can coexist \u2014 a stator fault and eccentricity together.<\/li>\n<\/ul>\n<h3>UMP and bearing life<\/h3>\n<ul>\n<li>UMP adds to bearing radial loads.<\/li>\n<li>It shortens bearing life (life \u221d 1\/load\u00b3).<\/li>\n<li>It produces asymmetric bearing wear.<\/li>\n<li>One bearing may fail prematurely while the other remains acceptable.<\/li>\n<\/ul>\n<h2>10. Putting It Together in the Field<\/h2>\n<p>Magnetic pull is an important coupling between the mechanical and electromagnetic worlds inside a motor. Recognising UMP as a source of 2\u00d7 line-frequency vibration, understanding its link to air-gap eccentricity, and appreciating its capacity to drive progressive failure through bearing overload are what enable a correct diagnosis. In practice the workflow is straightforward: trend the 2\u00d7f component, run the no-load test to confirm an electromagnetic origin, and rule out the mechanical look-alikes. A portable two-channel analyser such as the <a href=\"https:\/\/vibromera.eu\/yo\/product\/balanset-1\/\">Balanset-1A<\/a> captures the <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/amplitude\/\">amplitude<\/a> and <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/phase\/\">phase<\/a> of the running-speed and twice-line-frequency components on the assembled motor at operating speed, helping the engineer tell genuine UMP apart from a 1\u00d7 mechanical <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/unbalance\/\">unbalance<\/a> that simply needs <a href=\"https:\/\/vibromera.eu\/yo\/glossary\/field-balancing\/\">field balancing<\/a> \u2014 and so target the real fault rather than chase a symptom.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/yo\/glossary\/\">\u2190 Back to Main Index<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Learn about magnetic pull (UMP), unbalanced radial electromagnetic forces in motors from air gap eccentricity, causing vibration at 2X line frequency and rotor deflection.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,111],"tags":[],"class_list":["post-160","glossary","type-glossary","status-publish","hentry","category-glossary","category-rotor-balancing"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/glossary\/160","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/glossary\/160\/revisions"}],"predecessor-version":[{"id":102157,"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/glossary\/160\/revisions\/102157"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/media?parent=160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/categories?post=160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/yo\/wp-json\/wp\/v2\/tags?post=160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}