{"id":11245,"date":"2024-06-19T06:17:00","date_gmt":"2024-06-19T06:17:00","guid":{"rendered":"https:\/\/hsmagnet.com\/?p=11245"},"modified":"2025-09-10T07:50:09","modified_gmt":"2025-09-10T07:50:09","slug":"%d9%85%d8%ba%d9%86%d8%a7%d8%b7%d9%8a%d8%b3-%d8%b9%d8%af%d8%a7%d8%af-%d8%a7%d9%84%d9%85%d8%b3%d8%a7%d9%81%d8%a7%d8%aa-%d9%88%d9%85%d8%ba%d9%86%d8%a7%d8%b7%d9%8a%d8%b3-%d8%b9%d8%af%d8%a7%d8%af-%d8%a7","status":"publish","type":"post","link":"https:\/\/hsmagnet.com\/ar\/2024\/06\/19\/alnico-odometer-magnet-and-speedometer-magnet\/","title":{"rendered":"\u0645\u0642\u062f\u0645\u0629: \u0641\u0647\u0645 \u0645\u063a\u0646\u0627\u0637\u064a\u0633\u0627\u062a \u0639\u062f\u0627\u062f \u0627\u0644\u0645\u0633\u0627\u0641\u0627\u062a \u0648\u0639\u062f\u0627\u062f \u0627\u0644\u0633\u0631\u0639\u0629 \u0645\u0646 \u0645\u0627\u062f\u0629 \u0623\u0644\u0646\u064a\u0643\u0648"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Alnico odometer and speedometer magnets are essential permanent magnets used in vehicle instrumentation, particularly in mechanical gauges for cars, motorcycles, and other automotive applications. Made from an alloy of aluminum, nickel, and cobalt (Alnico), these magnets provide reliable magnetic fields for accurate distance and speed measurements. Commonly utilizing Alnico 2 or Alnico 3 grades, they offer a balance of strength, durability, and cost-effectiveness compared to rare-earth alternatives like neodymium (NdFeB) or samarium-cobalt (SmCo). In this guide, we&#8217;ll explore their key components, advantages, common sizes, and practical uses, highlighting why they&#8217;re a staple in the automotive industry and mechanical motorcycle repair market.<\/p>\n\n\n\n<!--more-->\n\n\n<div class=\"root-eb-toc-stirs wp-block-essential-blocks-table-of-contents\"><div class=\"eb-parent-wrapper eb-parent-eb-toc-stirs \"><div class=\"eb-toc-container eb-toc-stirs  eb-toc-is-not-sticky eb-toc-not-collapsible eb-toc-initially-not-collapsed eb-toc-scrollToTop style-1 list-style-none\" data-scroll-top=\"false\" data-scroll-top-icon=\"fas fa-angle-up\" data-collapsible=\"false\" data-sticky-hide-mobile=\"false\" data-sticky=\"false\" data-scroll-target=\"scroll_to_toc\" data-copy-link=\"false\" data-editor-type=\"\" data-hide-desktop=\"false\" data-hide-tab=\"false\" data-hide-mobile=\"false\" data-itemcollapsed=\"false\" data-highlight-scroll=\"false\"><div class=\"eb-toc-header\"><h2 class=\"eb-toc-title\">Table of Contents<\/h2><\/div><div class=\"eb-toc-wrapper \" data-headers=\"[{&quot;level&quot;:2,&quot;content&quot;:&quot;Key Components of Alnico Odometer Magnets&quot;,&quot;text&quot;:&quot;Key Components of Alnico Odometer Magnets&quot;,&quot;link&quot;:&quot;key-components-of-alnico-odometer-magnets&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;Advantages of Using Alnico for Odometer and Speedometer Magnets&quot;,&quot;text&quot;:&quot;Advantages of Using Alnico for Odometer and Speedometer Magnets&quot;,&quot;link&quot;:&quot;advantages-of-using-alnico-for-odometer-and-speedometer-magnets&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;Common Sizes for Alnico Odometer and Speedometer Magnets&quot;,&quot;text&quot;:&quot;Common Sizes for Alnico Odometer and Speedometer Magnets&quot;,&quot;link&quot;:&quot;common-sizes-for-alnico-odometer-and-speedometer-magnets&quot;},{&quot;level&quot;:2,&quot;content&quot;:&quot;Applications and Safety Tips&quot;,&quot;text&quot;:&quot;Applications and Safety Tips&quot;,&quot;link&quot;:&quot;applications-and-safety-tips&quot;}]\" data-visible=\"[true,true,true,true,true,true]\" data-delete-headers=\"[{&quot;label&quot;:&quot;Key Components of Alnico Odometer Magnets&quot;,&quot;value&quot;:&quot;key-components-of-alnico-odometer-magnets&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;Advantages of Using Alnico for Odometer and Speedometer Magnets&quot;,&quot;value&quot;:&quot;advantages-of-using-alnico-for-odometer-and-speedometer-magnets&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;Common Sizes for Alnico Odometer and Speedometer Magnets&quot;,&quot;value&quot;:&quot;common-sizes-for-alnico-odometer-and-speedometer-magnets&quot;,&quot;isDelete&quot;:false},{&quot;label&quot;:&quot;Applications and Safety Tips&quot;,&quot;value&quot;:&quot;applications-and-safety-tips&quot;,&quot;isDelete&quot;:false}]\" data-smooth=\"true\" data-top-offset=\"\"><div class=\"eb-toc__list-wrap\"><ul class=\"eb-toc__list\"><li><a href=\"#key-components-of-alnico-odometer-magnets\">Key Components of Alnico Odometer Magnets<\/a><li><a href=\"#advantages-of-using-alnico-for-odometer-and-speedometer-magnets\">Advantages of Using Alnico for Odometer and Speedometer Magnets<\/a><li><a href=\"#common-sizes-for-alnico-odometer-and-speedometer-magnets\">Common Sizes for Alnico Odometer and Speedometer Magnets<\/a><li><a href=\"#applications-and-safety-tips\">Applications and Safety Tips<\/a><\/ul><\/div><\/div><\/div><\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">Key Components of Alnico Odometer Magnets<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An Alnico odometer magnet typically consists of two primary components, designed for seamless integration into vehicle systems:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Outer Ring<\/strong>: This is a strong, cylindrical permanent magnet made from Alnico alloy. It provides the core magnetic force needed for gauge operation.<\/li>\n\n\n\n<li><strong>Magnetic Injection Molded Body<\/strong>: A cylindrical insert that fits snugly inside the outer ring via an interference fit. It&#8217;s crafted from a magnetically susceptible material, such as a plastic compound infused with magnetic particles, enhancing overall performance.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A standout feature is the shaft hole in the molded body, with a diameter approximately three times larger than the body&#8217;s overall diameter. This innovative design optimizes material use while ensuring robust functionality, making it ideal for high-volume production in automotive manufacturing.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/Alnico5-D250xd190x1501.jpg\" alt=\"Alnico5\" class=\"wp-image-12358\" srcset=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/Alnico5-D250xd190x1501.jpg 800w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/Alnico5-D250xd190x1501-300x300.jpg 300w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/Alnico5-D250xd190x1501-100x100.jpg 100w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/Alnico5-D250xd190x1501-600x600.jpg 600w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/Alnico5-D250xd190x1501-150x150.jpg 150w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2025\/08\/Alnico5-D250xd190x1501-768x768.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Advantages of Using Alnico for Odometer and Speedometer Magnets<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/hsmagnet.com\/magnetic-materials\/alnico-magnets\/\">Alnico magnets<\/a> excel in vehicle applications due to their unique properties, offering a compelling alternative to more expensive materials:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cost Efficiency<\/strong>: Alnico is more affordable than rare-earth magnets, and the design minimizes material usage without compromising strength, reducing production costs by up to 30% in some cases.<\/li>\n\n\n\n<li><strong>Performance and Reliability<\/strong>: They deliver sufficient magnetic field strength for precise odometer and speedometer readings, even in harsh environments. Alnico 2 offers higher remanence (magnetic retention), while Alnico 3 provides better coercivity (resistance to demagnetization), making them suitable for varying temperature conditions (-40\u00b0C to 350\u00b0C).<\/li>\n\n\n\n<li><strong>Simple Manufacturing<\/strong>: The straightforward production process, including casting and molding, allows for easy scalability and customization, which is beneficial for aftermarket repairs.<\/li>\n\n\n\n<li><strong>Durability<\/strong>: Resistant to corrosion and mechanical stress, these magnets maintain performance over time, outperforming some designs in longevity for mechanical systems.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In summary, Alnico magnets combine affordability with high performance, making them a valuable choice for budget-conscious automotive projects.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common Sizes for Alnico Odometer and Speedometer Magnets<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These magnets come in standardized sizes to fit various vehicle models. Below is a table of regular dimensions for Alnico 2 and Alnico 3 grades (all in mm, with tolerances of \u00b10.1mm):<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Size Specification<\/th><th>Material Grades<\/th><th>Typical Applications<\/th><\/tr><\/thead><tbody><tr><td>D23 \u00d7 d6 \u00d7 4<\/td><td>Alnico 2 and Alnico 3<\/td><td>Compact odometers in cars and bikes<\/td><\/tr><tr><td>D25 \u00d7 d6 \u00d7 5<\/td><td>Alnico 2 and Alnico 3<\/td><td>Standard speedometers in motorcycles<\/td><\/tr><tr><td>23 \u00d7 13.7 \u00d7 3<\/td><td>Alnico 3<\/td><td>Custom gauges for heavy-duty vehicles<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These sizes ensure compatibility with most mechanical systems. Custom dimensions can be requested based on specific requirements, such as shaft diameter or magnetic strength.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2023\/02\/Diagram-of-magnet-and-aluminum-cup-interaction-in-a-mechanical-speedometer-1024x683.webp\" alt=\"Diagram of magnet and aluminum cup interaction in a mechanical speedometer\" class=\"wp-image-13530\" srcset=\"https:\/\/hsmagnet.com\/wp-content\/uploads\/2023\/02\/Diagram-of-magnet-and-aluminum-cup-interaction-in-a-mechanical-speedometer-1024x683.webp 1024w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2023\/02\/Diagram-of-magnet-and-aluminum-cup-interaction-in-a-mechanical-speedometer-300x200.webp 300w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2023\/02\/Diagram-of-magnet-and-aluminum-cup-interaction-in-a-mechanical-speedometer-768x512.webp 768w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2023\/02\/Diagram-of-magnet-and-aluminum-cup-interaction-in-a-mechanical-speedometer-600x400.webp 600w, https:\/\/hsmagnet.com\/wp-content\/uploads\/2023\/02\/Diagram-of-magnet-and-aluminum-cup-interaction-in-a-mechanical-speedometer.webp 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Applications and Safety Tips<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alnico odometer and speedometer magnets are widely used in mechanical motorcycle repairs, classic car restorations, and industrial vehicles where electronic alternatives are impractical. For instance, in a motorcycle speedometer, the magnet drives the needle via eddy currents, providing accurate readings without batteries. Compared to neodymium magnets, Alnico is preferred for its thermal stability in high-heat engines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Safety and Usage Recommendations:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Handle with care to avoid demagnetization from extreme heat or impacts.<\/li>\n\n\n\n<li>Ensure proper installation to prevent interference with electronic components like sensors.<\/li>\n\n\n\n<li>Not suitable for high-precision digital systems; consult manufacturers for compatibility.<\/li>\n\n\n\n<li>For repairs, always use gloves and tools to avoid injury from sharp edges.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In conclusion, Alnico odometer and speedometer magnets represent a reliable, cost-effective solution for the automotive sector. Whether you&#8217;re in manufacturing or repairs, these magnets deliver performance without the premium price. Ready to integrate them into your project? <a href=\"https:\/\/hsmagnet.com\/contact-us\/\">Contact HSmagnet<\/a> today for quotes and custom options!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alnico odometer and speedometer magnets are essential permanent magnets used in vehicle instrumentation, particularly in mechanical gauges for cars, motorcycles, and other automotive applications. Made from an alloy of aluminum, nickel, and cobalt (Alnico), these magnets provide reliable magnetic fields for accurate distance and speed measurements. Commonly utilizing Alnico 2 or Alnico 3 grades, they [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":13531,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[25],"tags":[36,48,49,50],"class_list":["post-11245","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-alnico-magnet","tag-alnico-magnets","tag-mechanical-motorcycle-repair","tag-odometer-magnet","tag-speedometer-magnets"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Introduction: Understanding Alnico Odometer and Speedometer Magnets - Hangzhou HS Magnet Co.,Ltd.<\/title>\n<meta name=\"description\" content=\"An Alnico odometer magnet and speedometer magnet are both types of permanent magnets used in vehicles,usually use alnico 2 or 3 magnets.\" 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