{"id":1570,"date":"2025-05-10T03:00:20","date_gmt":"2025-05-10T03:00:20","guid":{"rendered":"https:\/\/nbaem.com\/?p=1570"},"modified":"2025-05-10T03:00:20","modified_gmt":"2025-05-10T03:00:20","slug":"magnet-pull-force-calculator","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/magnet-pull-force-calculator\/","title":{"rendered":"M\u00e1y t\u00ednh l\u1ef1c h\u00fat c\u1ee7a nam ch\u00e2m"},"content":{"rendered":"<h1>\u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a M\u00e1y t\u00ednh l\u1ef1c h\u00fat nam ch\u00e2m l\u00e0 bao nhi\u00eau?<\/h1>\n\n<p>S\u1ee9c m\u1ea1nh c\u1ee7a nam ch\u00e2m c\u00f3 th\u1ec3 g\u00e2y ng\u1ea1c nhi\u00ean. Nh\u01b0ng l\u00e0m th\u1ebf n\u00e0o ch\u00fang ta \u0111o l\u01b0\u1eddng n\u00f3 m\u00e0 kh\u00f4ng c\u1ea7n d\u1ee5ng c\u1ee5 ph\u00f2ng th\u00ed nghi\u1ec7m \u0111\u1eaft ti\u1ec1n?<\/p>\n<p><strong>M\u00e1y t\u00ednh l\u1ef1c h\u00fat nam ch\u00e2m cung c\u1ea5p m\u1ed9t \u01b0\u1edbc l\u01b0\u1ee3ng nhanh ch\u00f3ng, mang t\u00ednh l\u00fd thuy\u1ebft v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng m\u00e0 nam ch\u00e2m c\u00f3 th\u1ec3 gi\u1eef d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng.<\/strong><\/p>\n<div id=\"attachment_1574\" style=\"width: 589px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-1574\" class=\"wp-image-1574\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force.jpg\" alt=\"l\u1ef1c h\u00fat t\u1eeb tr\u01b0\u1eddng\" width=\"579\" height=\"394\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-200x136.jpg 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-300x204.jpg 300w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-400x272.jpg 400w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-600x408.jpg 600w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-768x522.jpg 768w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-800x544.jpg 800w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-1024x696.jpg 1024w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force-1200x815.jpg 1200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force.jpg 1292w\" sizes=\"(max-width: 579px) 100vw, 579px\" \/><p id=\"caption-attachment-1574\" class=\"wp-caption-text\">l\u1ef1c h\u00fat t\u1eeb tr\u01b0\u1eddng<\/p><\/div>\n<p>N\u1ebfu b\u1ea1n t\u1eebng c\u1ea7n bi\u1ebft \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m tr\u01b0\u1edbc khi mua ho\u1eb7c th\u1eed nghi\u1ec7m, m\u00e1y t\u00ednh l\u1ef1c h\u00fat l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 tuy\u1ec7t v\u1eddi. Nh\u01b0ng \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u r\u00f5 nh\u1eefng g\u00ec n\u00f3 c\u00f3 th\u1ec3\u2014and kh\u00f4ng th\u1ec3\u2014cho b\u1ea1n bi\u1ebft.<\/p>\n<h2>M\u00e1y t\u00ednh nam ch\u00e2m l\u00e0m g\u00ec?<\/h2>\n<p>\u0110\u00f4i khi m\u1ecdi ng\u01b0\u1eddi ngh\u0129 r\u1eb1ng m\u00e1y t\u00ednh nam ch\u00e2m ho\u1ea1t \u0111\u1ed9ng nh\u01b0 ph\u00e9p thu\u1eadt. Nh\u01b0ng th\u1ef1c t\u1ebf, ch\u00fang d\u1ef1a tr\u00ean khoa h\u1ecdc v\u00e0 gi\u1ea3 \u0111\u1ecbnh.<\/p>\n<p><strong>M\u00e1y t\u00ednh \u01b0\u1edbc l\u01b0\u1ee3ng l\u1ef1c c\u1ea7n \u0111\u1ec3 k\u00e9o nam ch\u00e2m tr\u1ef1c ti\u1ebfp ra kh\u1ecfi b\u1ec1 m\u1eb7t th\u00e9p d\u00e0y, ph\u1eb3ng, d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng.<\/strong><\/p>\n<h3>C\u00e1ch m\u00e1y t\u00ednh ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<p>L\u1ef1c h\u00fat \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1c c\u00f4ng th\u1ee9c d\u1ef1a tr\u00ean k\u00edch th\u01b0\u1edbc, h\u00ecnh d\u1ea1ng, c\u1ea5p \u0111\u1ed9 v\u1eadt li\u1ec7u c\u1ee7a nam ch\u00e2m v\u00e0 th\u00e9p m\u00e0 n\u00f3 ti\u1ebfp x\u00fac.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng:<\/p>\n<ul>\n<li><strong>Ch\u1ec9 b\u1ec1 m\u1eb7t ph\u1eb3ng<\/strong>: Th\u00e9p ph\u1ea3i l\u1edbn, d\u00e0y v\u00e0 m\u1ecbn.<\/li>\n<li><strong>Ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp<\/strong>: Kh\u00f4ng c\u00f3 kho\u1ea3ng c\u00e1ch gi\u1eefa nam ch\u00e2m v\u00e0 th\u00e9p tr\u1eeb khi \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/li>\n<li><strong>K\u00e9o th\u1eb3ng<\/strong>: Nam ch\u00e2m b\u1ecb k\u00e9o tr\u1ef1c ti\u1ebfp ra, kh\u00f4ng theo g\u00f3c.<\/li>\n<\/ul>\n<p>Nh\u1eefng gi\u1ea3 \u0111\u1ecbnh n\u00e0y gi\u00fap d\u1ec5 d\u00e0ng so s\u00e1nh c\u00e1c lo\u1ea1i nam ch\u00e2m, nh\u01b0ng ch\u00fang kh\u00f4ng ph\u1ea3n \u00e1nh m\u1ecdi thi\u1ebft l\u1eadp th\u1ef1c t\u1ebf.<\/p>\n<h3>Gi\u1ea3 \u0111\u1ecbnh \u0111\u1ea7u v\u00e0o ph\u1ed5 bi\u1ebfn<\/h3>\n<table>\n<thead>\n<tr>\n<th>Tham s\u1ed1<\/th>\n<th>\u00dd ngh\u0129a<\/th>\n<th>T\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>H\u00ecnh d\u1ea1ng nam ch\u00e2m<\/td>\n<td>Kh\u1ed1i, h\u00ecnh tr\u1ee5, h\u00ecnh v\u00f2ng, v.v.<\/td>\n<td>H\u00ecnh d\u1ea1ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn di\u1ec7n t\u00edch ti\u1ebfp x\u00fac v\u00e0 l\u1ef1c<\/td>\n<\/tr>\n<tr>\n<td><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/wp-content\/uploads\/2022\/06\/MAGNETIC-properties.pdf\">C\u1ea5p \u0111\u1ed9 nam ch\u00e2m<\/a><\/span><\/td>\n<td>N35, N42, N52, v.v.<\/td>\n<td>C\u1ea5p cao h\u01a1n m\u1ea1nh h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>K\u00edch th\u01b0\u1edbc<\/td>\n<td>\u0110\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, chi\u1ec1u d\u00e0i, chi\u1ec1u r\u1ed9ng<\/td>\n<td>Nam ch\u00e2m l\u1edbn h\u01a1n th\u01b0\u1eddng h\u00fat m\u1ea1nh h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>Kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed<\/td>\n<td>Kho\u1ea3ng c\u00e1ch gi\u1eefa nam ch\u00e2m v\u00e0 th\u00e9p<\/td>\n<td>Ngay c\u1ea3 0.1mm c\u0169ng l\u00e0m gi\u1ea3m l\u1ef1c \u0111\u00e1ng k\u1ec3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>B\u1ea1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i nh\u1eefng \u0111i\u1ec1u n\u00e0y \u0111\u1ec3 kh\u00e1m ph\u00e1 c\u00e1ch hi\u1ec7u su\u1ea5t thay \u0111\u1ed5i v\u1ec1 l\u00fd thuy\u1ebft.<\/p>\n<h2>Nh\u1eefng gi\u1ea3 \u0111\u1ecbnh n\u00e0o \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c?<\/h2>\n<p>D\u1ec5 d\u00e0ng tin t\u01b0\u1edfng v\u00e0o m\u1ed9t con s\u1ed1 tr\u00ean m\u00e0n h\u00ecnh. Nh\u01b0ng m\u00e1y t\u00ednh l\u1ef1c h\u00fat t\u1eeb tr\u01b0\u1eddng kh\u00f4ng ho\u00e0n h\u1ea3o.<\/p>\n<p><strong>K\u1ebft qu\u1ea3 gi\u1ea3 \u0111\u1ecbnh \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m l\u00fd t\u01b0\u1edfng. Trong th\u1ef1c t\u1ebf, \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t, l\u1edbp ph\u1ee7, nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c g\u00f3c k\u00e9o c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m l\u1ef1c th\u1ef1c t\u1ebf.<\/strong><\/p>\n<h3>Khi c\u00e1c con s\u1ed1 g\u00e2y hi\u1ec3u l\u1ea7m<\/h3>\n<p>H\u00e3y ph\u00e2n t\u00edch nh\u1eefng nguy\u00ean nh\u00e2n th\u01b0\u1eddng g\u00e2y ra l\u1ed7i:<\/p>\n<h4>1. Nh\u1eefng khuy\u1ebft t\u1eadt tr\u00ean b\u1ec1 m\u1eb7t<\/h4>\n<p>Ngay c\u1ea3 v\u1ebft tr\u1ea7y nh\u1ecf ho\u1eb7c m\u1ed9t ch\u00fat r\u1ec9 s\u00e9t c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m l\u1ef1c gi\u1eef ch\u1eb7t t\u1eeb 10%\u201330%. Nam ch\u00e2m ph\u1ea3i n\u1eb1m s\u00e1t ph\u1eb3ng v\u1edbi b\u1ec1 m\u1eb7t \u0111\u1ec3 \u0111\u1ea1t l\u1ef1c t\u1ed1i \u0111a.<\/p>\n<h4>2. H\u01b0\u1edbng k\u00e9o<\/h4>\n<p>N\u1ebfu b\u1ea1n k\u00e9o theo g\u00f3c thay v\u00ec th\u1eb3ng ra, l\u1ef1c c\u1ea7n thi\u1ebft s\u1ebd gi\u1ea3m. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p th\u1ef1c t\u1ebf, ch\u00fang ta tr\u01b0\u1ee3t nam ch\u00e2m thay v\u00ec k\u00e9o th\u1eb3ng ra.<\/p>\n<h4>3. L\u1edbp ph\u1ee7 v\u00e0 kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed<\/h4>\n<p>Nam ch\u00e2m th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u1ee7 nickel ho\u1eb7c epoxy, \u0111i\u1ec1u n\u00e0y l\u00e0m t\u0103ng \u0111\u1ed9 d\u00e0y nh\u1ecf v\u00e0 gi\u1ea3m l\u1ef1c k\u00e9o. Kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed ch\u1ec9 0.5 mm c\u00f3 th\u1ec3 gi\u1ea3m m\u1ed9t n\u1eeda s\u1ee9c m\u1ea1nh.<\/p>\n<h4>4. Lo\u1ea1i v\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a th\u00e9p<\/h4>\n<p>Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 th\u00e9p \u0111\u1ec1u gi\u1ed1ng nhau. Th\u00e9p m\u1ec1m, \u00edt carbon ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t. N\u1ebfu th\u00e9p qu\u00e1 m\u1ecfng, n\u00f3 s\u1ebd b\u00e3o h\u00f2a v\u00e0 kh\u00f4ng cho ph\u00e9p nam ch\u00e2m k\u00e9o v\u1edbi l\u1ef1c t\u1ed1i \u0111a.<\/p>\n<table>\n<thead>\n<tr>\n<th>Y\u1ebfu t\u1ed1 th\u1ef1c t\u1ebf<\/th>\n<th>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn l\u1ef1c k\u00e9o<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>R\u1ec9 s\u00e9t ho\u1eb7c s\u01a1n tr\u00ean th\u00e9p<\/td>\n<td>-20% \u0111\u1ebfn -40%<\/td>\n<\/tr>\n<tr>\n<td>K\u00e9o g\u00f3c<\/td>\n<td>-30% \u0111\u1ebfn -60%<\/td>\n<\/tr>\n<tr>\n<td>Kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed 0.5mm<\/td>\n<td>-50% tr\u1edf l\u00ean<\/td>\n<\/tr>\n<tr>\n<td>Th\u00e9p m\u1ecfng (&lt;1mm)<\/td>\n<td>B\u00e3o h\u00f2a gi\u1edbi h\u1ea1n, l\u1ef1c k\u00e9o th\u1ea5p h\u01a1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>T\u00f4i c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c tham s\u1ed1 \u0111\u1ea7u v\u00e0o n\u00e0o?<\/h2>\n<p>M\u1ed7i \u1ee9ng d\u1ee5ng nam ch\u00e2m \u0111\u1ec1u kh\u00e1c nhau. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao m\u00e1y t\u00ednh cho ph\u00e9p b\u1ea1n ch\u1ecdn t\u1eeb nhi\u1ec1u t\u00f9y ch\u1ecdn.<\/p>\n<p><strong>B\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn h\u00ecnh d\u1ea1ng, c\u1ea5p \u0111\u1ed9, k\u00edch th\u01b0\u1edbc v\u00e0 kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed t\u00f9y ch\u1ecdn \u0111\u1ec3 xem c\u00e1ch n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u1ef1c h\u00fat.<\/strong><\/p>\n<h3>Gi\u1ea3i th\u00edch c\u00e1c t\u00f9y ch\u1ecdn nh\u1eadp<\/h3>\n<h4>H\u00ecnh d\u1ea1ng nam ch\u00e2m<\/h4>\n<p>\u1ed0ng tr\u00f2n, \u0111\u0129a, kh\u1ed1i, v\u00e0 v\u00f2ng kh\u00e1c nhau do di\u1ec7n t\u00edch ti\u1ebfp x\u00fac c\u1ee7a ch\u00fang. M\u1ed9t di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ph\u1eb3ng l\u1edbn gi\u00fap nam ch\u00e2m b\u00e1m t\u1ed1t h\u01a1n.<\/p>\n<h4>C\u1ea5p \u0111\u1ed9 nam ch\u00e2m<\/h4>\n<p>Nam ch\u00e2m c\u1ea5p cao h\u01a1n nh\u01b0 N52 m\u1ea1nh h\u01a1n N35 ho\u1eb7c N42. Nh\u01b0ng ch\u00fang c\u0169ng \u0111\u1eaft h\u01a1n v\u00e0 d\u1ec5 v\u1ee1 h\u01a1n.<\/p>\n<h4>Kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed<\/h4>\n<p>\u0110i\u1ec1u n\u00e0y m\u00f4 ph\u1ecfng l\u1edbp ph\u1ee7, s\u01a1n ho\u1eb7c l\u1ec7ch l\u1ea1c nh\u1eb9. Ngay c\u1ea3 m\u1ed9t kho\u1ea3ng c\u00e1ch nh\u1ecf c\u0169ng t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn. Lu\u00f4n ki\u1ec3m tra v\u1edbi kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed th\u1ef1c t\u1ebf n\u1ebfu b\u1ea1n d\u1ef1 \u0111\u1ecbnh s\u1eed d\u1ee5ng trong th\u1ef1c t\u1ebf.<\/p>\n<table>\n<thead>\n<tr>\n<th>H\u00ecnh d\u1ea1ng<\/th>\n<th>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<th>\u1ea2nh h\u01b0\u1edfng l\u1ef1c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Kh\u1ed1i<\/td>\n<td>Ph\u1ee5 ki\u1ec7n, gi\u00e1 \u0111\u1ee1<\/td>\n<td>Di\u1ec7n t\u00edch ti\u1ebfp x\u00fac l\u1edbn<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u0129a<\/td>\n<td>L\u00e0m DIY, th\u1ee7 c\u00f4ng<\/td>\n<td>\u0110a n\u0103ng t\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td>V\u00f2ng<\/td>\n<td>C\u1ea3m bi\u1ebfn, d\u1ee5ng c\u1ee5 quay<\/td>\n<td>S\u1eed d\u1ee5ng chuy\u00ean d\u1ee5ng<\/td>\n<\/tr>\n<tr>\n<td>\u1ed0ng tr\u1ee5<\/td>\n<td>\u1ee8ng d\u1ee5ng \u0111\u1ea9y\/k\u00e9o<\/td>\n<td>L\u1ef1c k\u00e9o cao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>K\u1ebft qu\u1ea3 th\u1ef1c s\u1ef1 c\u00f3 \u00fd ngh\u0129a g\u00ec?<\/h2>\n<p>Nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng xem s\u1ed1 tr\u00ean m\u00e1y t\u00ednh l\u00e0 gi\u1edbi h\u1ea1n th\u1ef1c t\u1ebf c\u1ee7a nam ch\u00e2m. Nh\u01b0ng \u0111\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a c\u00e2u chuy\u1ec7n.<\/p>\n<p><strong>M\u00e1y t\u00ednh cho th\u1ea5y l\u1ef1c gi\u1eef t\u1ed1i \u0111a v\u1ec1 l\u00fd thuy\u1ebft \u2014 th\u01b0\u1eddng cao h\u01a1n nhi\u1ec1u so v\u1edbi th\u1ef1c t\u1ebf.<\/strong><\/p>\n<div id=\"attachment_1575\" style=\"width: 692px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-1575\" class=\"wp-image-1575\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-1024x319.jpg\" alt=\"M\u00e1y t\u00ednh nam ch\u00e2m\" width=\"682\" height=\"212\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-200x62.jpg 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-300x93.jpg 300w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-400x124.jpg 400w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-600x187.jpg 600w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-768x239.jpg 768w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-800x249.jpg 800w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-1024x319.jpg 1024w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-1200x373.jpg 1200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnet-Pull-Force-Calculator-1536x478.jpg 1536w\" sizes=\"(max-width: 682px) 100vw, 682px\" \/><p id=\"caption-attachment-1575\" class=\"wp-caption-text\">M\u00e1y t\u00ednh l\u1ef1c h\u00fat c\u1ee7a nam ch\u00e2m<\/p><\/div>\n<h3>T\u1ea1i sao l\u1ef1c k\u00e9o th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 th\u1ea5p h\u01a1n<\/h3>\n<p>S\u1ee9c m\u1ea1nh gi\u1eef th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1ch nam ch\u00e2m \u0111\u01b0\u1ee3c g\u1eafn, v\u1eadt n\u00f3 gi\u1eef v\u00e0 l\u1ef1c c\u1eaft li\u00ean quan.<\/p>\n<p>V\u00ed d\u1ee5, l\u1ef1c k\u00e9o 20 lb c\u00f3 th\u1ec3 ch\u1ec9 gi\u1eef \u0111\u01b0\u1ee3c 5\u201310 lb trong tr\u01b0\u1eddng h\u1ee3p tr\u01b0\u1ee3t ngang.<\/p>\n<p>Ngo\u00e0i ra, s\u1ed1c ho\u1eb7c rung \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0m nam ch\u00e2m b\u1ecb l\u1ecfng, ngay c\u1ea3 khi m\u00e1y t\u00ednh n\u00f3i l\u1ef1c m\u1ea1nh.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn s\u01a1 b\u1ed9:<\/p>\n<table>\n<thead>\n<tr>\n<th>L\u1ef1c k\u00e9o \u01b0\u1edbc t\u00ednh<\/th>\n<th>Tr\u1ecdng l\u01b0\u1ee3ng gi\u1eef th\u1ef1c t\u1ebf khi s\u1eed d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>5 lb<\/td>\n<td>1\u20132 lb<\/td>\n<\/tr>\n<tr>\n<td>20 lb<\/td>\n<td>5\u201310 lb<\/td>\n<\/tr>\n<tr>\n<td>50 lb<\/td>\n<td>15\u201325 lb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>M\u00e1y t\u00ednh ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n<p>M\u1ecdi ng\u01b0\u1eddi th\u01b0\u1eddng h\u1ecfi li\u1ec7u m\u00e1y t\u00ednh c\u00f3 s\u1eed d\u1ee5ng d\u1eef li\u1ec7u th\u1ef1c kh\u00f4ng. N\u00f3 kh\u00f4ng s\u1eed d\u1ee5ng k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m v\u1eadt l\u00fd\u2014n\u00f3 s\u1eed d\u1ee5ng to\u00e1n h\u1ecdc.<\/p>\n<p><strong>N\u00f3 \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh l\u1ef1c t\u1eeb tr\u01b0\u1eddng ti\u00eau chu\u1ea9n \u0111\u1ec3 \u01b0\u1edbc t\u00ednh l\u1ef1c k\u00e9o d\u1ef1a tr\u00ean c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ea7u v\u00e0o.<\/strong><\/p>\n<div id=\"attachment_1576\" style=\"width: 705px\" class=\"wp-caption alignnone\"><img decoding=\"async\" aria-describedby=\"caption-attachment-1576\" class=\"wp-image-1576\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-1024x273.jpg\" alt=\"Ph\u01b0\u01a1ng tr\u00ecnh l\u1ef1c t\u1eeb cho nam ch\u00e2m\" width=\"695\" height=\"185\" srcset=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-200x53.jpg 200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-300x80.jpg 300w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-400x107.jpg 400w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-600x160.jpg 600w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-768x205.jpg 768w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-800x213.jpg 800w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-1024x273.jpg 1024w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-1200x320.jpg 1200w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets-1536x409.jpg 1536w, https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Magnetic-force-equations-for-magnets.jpg 1756w\" sizes=\"(max-width: 695px) 100vw, 695px\" \/><p id=\"caption-attachment-1576\" class=\"wp-caption-text\">Ph\u01b0\u01a1ng tr\u00ecnh l\u1ef1c t\u1eeb tr\u01b0\u1eddng<\/p><\/div>\n<h3>C\u00e1ch t\u00ednh l\u1ef1c k\u00e9o<\/h3>\n<p>L\u1ef1c gi\u1eefa nam ch\u00e2m v\u00e0 t\u1ea5m th\u00e9p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u01b0\u1edbc l\u01b0\u1ee3ng b\u1eb1ng c\u00f4ng th\u1ee9c:<\/p>\n<blockquote><p>F = (B\u00b2 \u00d7 A) \/ (2 \u00d7 \u03bc\u2080)<\/p><\/blockquote>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><strong>F<\/strong> = L\u1ef1c k\u00e9o<\/li>\n<li><strong>B<\/strong> = \u0110\u1ed9 l\u1ec7ch t\u1eeb tr\u01b0\u1eddng<\/li>\n<li><strong>A<\/strong> = Di\u1ec7n t\u00edch ti\u1ebfp x\u00fac<\/li>\n<li><strong>\u03bc\u2080<\/strong> = \u0110\u1ed9 d\u1eabn t\u1eeb c\u1ee7a kh\u00f4ng kh\u00ed t\u1ef1 do<\/li>\n<\/ul>\n<p>C\u00f4ng th\u1ee9c n\u00e0y gi\u1ea3 \u0111\u1ecbnh:<\/p>\n<ul>\n<li>Tr\u01b0\u1eddng \u0111\u1ed3ng nh\u1ea5t<\/li>\n<li>Ti\u1ebfp x\u00fac ho\u00e0n h\u1ea3o<\/li>\n<li>Kh\u00f4ng c\u00f3 khe h\u1edf kh\u00ed<\/li>\n<li>\u0110\u1ed9 b\u00e3o h\u00f2a th\u00e9p ho\u00e0n to\u00e0n<\/li>\n<\/ul>\n<p>N\u00f3i c\u00e1ch kh\u00e1c, \u0111\u00e2y l\u00e0 k\u1ecbch b\u1ea3n t\u1ed1t nh\u1ea5t, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1ea3m b\u1ea3o.<\/p>\n<h2>B\u1ea1n c\u00f3 th\u1ec3 h\u1ecdc th\u00eam \u1edf \u0111\u00e2u?<\/h2>\n<p>B\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ea3i l\u00e0 nh\u00e0 v\u1eadt l\u00fd \u0111\u1ec3 hi\u1ec3u v\u1ec1 \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m. Nh\u01b0ng n\u1ebfu b\u1ea1n mu\u1ed1n t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n, c\u00f3 nhi\u1ec1u t\u00e0i nguy\u00ean h\u1eefu \u00edch t\u1ed3n t\u1ea1i.<\/p>\n<p><strong>Trang t\u00ednh to\u00e1n li\u00ean k\u1ebft \u0111\u1ebfn c\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p, h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt v\u00e0 \u0111\u1ec1 xu\u1ea5t s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c h\u00ecnh d\u1ea1ng v\u00e0 c\u1ea5p \u0111\u1ed9 nam ch\u00e2m kh\u00e1c nhau.<\/strong><\/p>\n<h3>Li\u00ean k\u1ebft h\u1eefu \u00edch t\u1eeb K&amp;J Magnetics<\/h3>\n<ul>\n<li><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/www.kjmagnetics.com\/magnet-strength-calculator.asp?srsltid=AfmBOorGgZ5KYiiaaml-zgKZ7WXlw_ltf6vIP_uwhJwIVWcLYidzW44G\" rel=\"noopener\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p: \u0110\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m<\/a><\/span><\/li>\n<li><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/www.kjmagnetics.com\/category\/neodymium-magnets\" rel=\"noopener\">So s\u00e1nh h\u00ecnh d\u1ea1ng nam ch\u00e2m<\/a><\/span><\/li>\n<li><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/www.kjmagnetics.com\/blog\/what-magnet-coating-should-i-use\" rel=\"noopener\">L\u1edbp ph\u1ee7 v\u00e0 v\u1eadt li\u1ec7u c\u1ee7a nam ch\u00e2m<\/a><\/span><\/li>\n<\/ul>\n<p>T\u00f4i lu\u00f4n khuy\u00ean b\u1ea1n th\u1eed nghi\u1ec7m nam ch\u00e2m trong \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh. S\u1eed d\u1ee5ng m\u00e1y t\u00ednh \u0111\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch, nh\u01b0ng x\u00e1c nh\u1eadn k\u1ebft qu\u1ea3 b\u1eb1ng thi\u1ebft l\u1eadp th\u1ef1c t\u1ebf.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>M\u00e1y t\u00ednh nam ch\u00e2m l\u00e0 c\u00f4ng c\u1ee5 tuy\u1ec7t v\u1eddi \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng, nh\u01b0ng th\u1eed nghi\u1ec7m l\u00e0 c\u00e1ch duy nh\u1ea5t \u0111\u1ec3 bi\u1ebft ch\u1eafc ch\u1eafn.<\/p>","protected":false},"excerpt":{"rendered":"<p>How Accurate Is a Magnet Pull Force Calculator? Magnet strength can be surprising. But how do we measure it without expensive lab tools? A magnet pull force calculator gives a fast, theoretical estimate of how much weight a magnet can hold under ideal conditions. If you\u2019ve ever needed to know [&hellip;]<\/p>","protected":false},"author":1,"featured_media":1574,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/magnet-pull-force.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=1570"}],"version-history":[{"count":9,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1570\/revisions"}],"predecessor-version":[{"id":1582,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1570\/revisions\/1582"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1574"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}