{"id":4475,"date":"2026-07-14T07:27:07","date_gmt":"2026-07-14T07:27:07","guid":{"rendered":"https:\/\/spotlight-motor.com\/?post_type=product&#038;p=4475"},"modified":"2026-08-25T02:32:41","modified_gmt":"2026-08-25T02:32:41","slug":"vacuum-stepper-motor-20-and-28","status":"publish","type":"product","link":"https:\/\/spotlight-motor.com\/zh\/product\/vacuum-stepper-motor-20-and-28\/","title":{"rendered":"20\/28 mm \u771f\u7a7a\u6b65\u8fdb\u7535\u673a"},"content":{"rendered":"<style>\nbody.postid-4475 {\n  overflow-x: hidden;\n}\nbody.postid-4475 [data-id=\"4e2fba0\"],\nbody.postid-4475 [data-id=\"169d9d5\"],\nbody.postid-4475 [data-id=\"4ab745c\"],\nbody.postid-4475 [data-id=\"a65d5ba\"],\nbody.postid-4475 [data-id=\"77d8c47\"],\nbody.postid-4475 [data-id=\"79389ad\"],\nbody.postid-4475 [data-id=\"8d9b055\"],\nbody.postid-4475 [data-id=\"6b8732b\"],\nbody.postid-4475 [data-id=\"bc89a15\"] {\n  display: none !important;\n}\nbody.postid-4475 [data-id=\"9b05c0a\"],\nbody.postid-4475 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p{margin-bottom:0}@media(max-width:767px){.sl-tech-grid{grid-template-columns:1fr}.sl-tech-grid>.sl-tech-figure:last-child:nth-child(odd){grid-column:auto;width:100%}.sl-tech-grid .sl-tech-figure img{height:auto;max-height:none}.sl-original-data{gap:14px;margin-top:30px}.sl-original-data img{padding:8px}}\n<\/style>\n<div class=\"sl-product-page\">\n<nav class=\"sl-fullbleed sl-detail-nav\" aria-label=\"Product detail navigation\">\n<div class=\"sl-inner sl-detail-nav__inner\"><a href=\"\/product\/vacuum-stepper-motor-20-and-28\/#sl-features\">Product benefits<\/a><a href=\"\/product\/vacuum-stepper-motor-20-and-28\/#sl-technical\">Technical data<\/a><a href=\"\/product\/vacuum-stepper-motor-20-and-28\/#sl-integration\">Integration<\/a><a href=\"\/product\/vacuum-stepper-motor-20-and-28\/#sl-applications\">Applications<\/a><a href=\"\/product\/vacuum-stepper-motor-20-and-28\/#sl-consultation\">Request consultation<\/a><\/div>\n<\/nav>\n<section id=\"sl-features\" class=\"sl-fullbleed sl-section sl-features\">\n<div class=\"sl-inner\">\n<div class=\"sl-kicker\">Precision motion for vacuum equipment<\/div>\n<h2 class=\"sl-title\">Reliable controlled motion in demanding vacuum environments<\/h2>\n<p class=\"sl-lead\">A dedicated motor platform for accurate positioning and dependable operation inside advanced vacuum systems.<\/p>\n<div class=\"sl-feature-grid\">\n<article class=\"sl-feature-card\">\n<div class=\"sl-feature-icon\" aria-hidden=\"true\"><\/div>\n<h3>Vacuum-oriented design<\/h3>\n<p>Supports equipment that requires clean materials and controlled environments.<\/p>\n<\/article>\n<article class=\"sl-feature-card\">\n<div class=\"sl-feature-icon\" aria-hidden=\"true\"><\/div>\n<h3>Precise motion<\/h3>\n<p>Enables repeatable positioning for demanding machine axes.<\/p>\n<\/article>\n<article class=\"sl-feature-card\">\n<div class=\"sl-feature-icon\" aria-hidden=\"true\"><\/div>\n<h3>Integration flexibility<\/h3>\n<p>Original rated data supports mechanical and electrical planning.<\/p>\n<\/article>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"sl-technical\" class=\"sl-fullbleed sl-section sl-tech\">\n<div class=\"sl-inner\">\n<div class=\"sl-kicker\">Engineering information<\/div>\n<h2 class=\"sl-title\">Technical data<\/h2>\n<p class=\"sl-lead\">Electrical, mechanical and load specifications for the 20 mm and 28 mm vacuum stepper motor variants.<\/p>\n<div class=\"sl-original-data\">\n<style>\n.sl-original-data{display:grid;gap:26px;min-width:0}\n.sl-tech-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:stretch}\n.sl-tech-grid .sl-tech-figure{display:flex;flex-direction:column;width:100%;min-width:0}\n.sl-tech-grid .sl-tech-figure img{width:100%;height:320px;box-sizing:border-box;object-fit:contain!important}\n.sl-tech-grid .sl-tech-figure figcaption{min-height:52px;box-sizing:border-box}\n.sl-tech-grid>.sl-tech-figure:last-child:nth-child(odd){grid-column:1\/-1;width:calc(50% - 12px);justify-self:center}\n.sl-tech-panel,.sl-tech-figure{min-width:0;margin:0;border:1px solid #dfe5ea;background:#fff;box-shadow:0 16px 42px rgba(16,20,25,.06)}\n.sl-tech-panel__head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;padding:24px 26px 20px;border-bottom:1px solid #dfe5ea;background:linear-gradient(135deg,#fff 0%,#f5f8fa 100%)}\n.sl-tech-panel__head span{display:block;margin-bottom:7px;color:#4f84ae;font-size:11px;font-weight:800;letter-spacing:.15em;text-transform:uppercase}\n.sl-tech-panel__head h3{margin:0;color:#101419;font-size:22px;font-weight:500;letter-spacing:-.02em}\n.sl-table-scroll{display:block;width:100%;max-width:100%;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;touch-action:pan-x pan-y}\n.sl-data-table{width:100%;margin:0;border:0;border-collapse:collapse;background:#fff;font-size:14px}\n.sl-data-table th{padding:13px 16px;border:0;border-right:1px solid #26333d;background:#0b141c;color:#fff;font-size:11px;font-weight:700;line-height:1.35;letter-spacing:.045em;text-align:left;vertical-align:middle}\n.sl-data-table td{padding:13px 16px;border:0;border-right:1px solid #e1e7eb;border-bottom:1px solid #e1e7eb;color:#4f5b66;line-height:1.45;text-align:left;vertical-align:top}\n.sl-data-table th:last-child,.sl-data-table td:last-child{border-right:0}\n.sl-data-table tbody tr:nth-child(even) td{background:#f7f9fa}\n.sl-data-table tbody tr:last-child td{border-bottom:0}\n.sl-data-table td:first-child{color:#17222c;font-weight:600}\n.sl-tech-figure{overflow:hidden}\n.sl-tech-figure img{display:block;width:100%;height:auto;margin:0!important;padding:18px;border:0!important;background:#fff;box-shadow:none!important}\n.sl-tech-figure figcaption{padding:12px 18px;border-top:1px solid #e3e8ec;color:#67727d;font-size:12px;letter-spacing:.04em}\n@media(max-width:767px){.sl-original-data{gap:16px}.sl-tech-panel__head{align-items:flex-start;flex-direction:column;gap:8px;padding:20px 18px 17px}.sl-tech-panel__head h3{font-size:19px}.sl-data-table th,.sl-data-table td{padding:12px 14px}.sl-tech-figure img{padding:8px}.sl-tech-figure figcaption{padding:10px 12px}}\n<\/style>\n<div class=\"sl-tech-grid\">\n<figure class=\"sl-tech-figure\"><img decoding=\"async\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/08\/sp20-vacuum-stepper-motor-mechanical-dimensions.png\" alt=\"SP20 vacuum stepper motor mechanical dimensions\"  title=\"20\/28 mm Vacuum Stepper Motor\" \/><figcaption>SP20 mechanical dimensions<\/figcaption><\/figure>\n<figure class=\"sl-tech-figure\"><img decoding=\"async\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/08\/sp28-vacuum-stepper-motor-mechanical-dimensions.png\" alt=\"SP28 vacuum stepper motor mechanical dimensions\"  title=\"20\/28 mm Vacuum Stepper Motor\" \/><figcaption>SP28 mechanical dimensions<\/figcaption><\/figure>\n<figure class=\"sl-tech-figure\"><img decoding=\"async\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/08\/sp20-sp28-vacuum-stepper-motor-double-shaft-wiring-dimensions.png\" alt=\"SP20 and SP28 vacuum stepper motor double-shaft dimensions and wiring\"  title=\"20\/28 mm Vacuum Stepper Motor\" \/><figcaption>SP20 and SP28 double-shaft dimensions and wiring<\/figcaption><\/figure>\n<\/div>\n<article class=\"sl-tech-panel\">\n<header class=\"sl-tech-panel__head\">\n<div>\n<p>Engineering data<\/p>\n<h3>General Specifications<\/h3>\n<\/div>\n<\/header>\n<div class=\"sl-table-scroll\" tabindex=\"0\" role=\"region\" aria-label=\"Scrollable technical data\">\n<table class=\"sl-data-table\" style=\"min-width: 760px;\">\n<thead>\n<tr>\n<th scope=\"col\">Specification<\/th>\n<th scope=\"col\">Value<\/th>\n<th scope=\"col\">Specification<\/th>\n<th scope=\"col\">Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Step angle<\/td>\n<td>1.8\u00b0<\/td>\n<td>Insulation class<\/td>\n<td>Class B<\/td>\n<\/tr>\n<tr>\n<td>Radial clearance<\/td>\n<td>0.025 mm (450 g load)<\/td>\n<td>Dielectric strength<\/td>\n<td>500 VAC, 50 Hz, 1 mA, 1 minute<\/td>\n<\/tr>\n<tr>\n<td>Axial clearance<\/td>\n<td>0.075 mm (920 g load)<\/td>\n<td>Motor temperature rise<\/td>\n<td>80\u00b0C max. (rated current, atmospheric pressure)<\/td>\n<\/tr>\n<tr>\n<td>Resistance accuracy<\/td>\n<td>\u00b15%<\/td>\n<td>Ambient temperature<\/td>\n<td>Temperature class selectable<\/td>\n<\/tr>\n<tr>\n<td>Inductance accuracy<\/td>\n<td>\u00b110%<\/td>\n<td>Radial load<\/td>\n<td>10 N max. for 20\/28 series (at 20 mm from flange face)<\/td>\n<\/tr>\n<tr>\n<td>Insulation resistance<\/td>\n<td>100 M\u03a9<\/td>\n<td>Axial load<\/td>\n<td>20 series: 2 N max.; 28 series: 5 N max.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/article>\n<article class=\"sl-tech-panel\">\n<header class=\"sl-tech-panel__head\">\n<div>\n<p>Engineering data<\/p>\n<h3>Model Specifications<\/h3>\n<\/div>\n<\/header>\n<div class=\"sl-table-scroll\" tabindex=\"0\" role=\"region\" aria-label=\"Scrollable technical data\">\n<table class=\"sl-data-table\" style=\"min-width: 1250px;\">\n<thead>\n<tr>\n<th scope=\"col\">Model<\/th>\n<th scope=\"col\">Step angle (\u00b0)<\/th>\n<th scope=\"col\">Body length Lmax (mm)<\/th>\n<th scope=\"col\">Rated current (A)<\/th>\n<th scope=\"col\">Phase resistance (\u03a9)<\/th>\n<th scope=\"col\">Phase inductance (mH)<\/th>\n<th scope=\"col\">Holding torque (N\u00b7m)<\/th>\n<th scope=\"col\">Rotor inertia (g\u00b7cm\u00b2)<\/th>\n<th scope=\"col\">Weight (kg)<\/th>\n<th scope=\"col\">Recommended driver<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>YC20242**<\/td>\n<td>1.8<\/td>\n<td>42 (optional 28)<\/td>\n<td>0.5<\/td>\n<td>11.8<\/td>\n<td>5.5<\/td>\n<td>0.036<\/td>\n<td>2.7<\/td>\n<td>0.1<\/td>\n<td>DM422S<\/td>\n<\/tr>\n<tr>\n<td>YC28251**<\/td>\n<td>1.8<\/td>\n<td>51 (optional 33)<\/td>\n<td>0.5<\/td>\n<td>11<\/td>\n<td>11<\/td>\n<td>0.14<\/td>\n<td>18<\/td>\n<td>0.24<\/td>\n<td>DM422S<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/article>\n<\/div>\n<p class=\"sl-original-note\">Always confirm the final operating point and installation conditions with Spotlight Motor engineering support.<\/p>\n<\/div>\n<\/section>\n<section id=\"sl-integration\" class=\"sl-fullbleed sl-showcase\">\n<div class=\"sl-inner sl-showcase-grid\">\n<div>\n<div class=\"sl-kicker\">System integration<\/div>\n<h2 class=\"sl-title\">Plan the complete vacuum motion axis with confidence<\/h2>\n<p>Confirm vacuum level, load profile, cabling, controller interface and thermal conditions during system design.<\/p>\n<ul class=\"sl-checks\">\n<li>Validate target vacuum level and materials<\/li>\n<li>Match torque and speed to the duty cycle<\/li>\n<li>Plan cabling and feedthrough interfaces<\/li>\n<\/ul>\n<\/div>\n<div class=\"sl-product-visual\"><img fetchpriority=\"high\" decoding=\"async\" width=\"2560\" height=\"2560\" class=\"wp-image-5215\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-scaled.png\" alt=\"20\/28 mm vacuum stepper motors\"  title=\"20\/28 mm Vacuum Stepper Motor\" srcset=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-scaled.png 2560w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-300x300.png 300w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-1024x1024.png 1024w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-150x150.png 150w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-768x768.png 768w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-1536x1536.png 1536w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-2048x2048.png 2048w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-600x600.png 600w, https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/07\/20-28-mm-vacuum-stepper-motor-main-100x100.png 100w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/div>\n<\/div>\n<\/section>\n<section id=\"sl-applications\" class=\"sl-fullbleed sl-section sl-applications\">\n<div class=\"sl-inner\">\n<div class=\"sl-kicker\">Application fields<\/div>\n<h2 class=\"sl-title\">Designed for demanding vacuum automation<\/h2>\n<p class=\"sl-lead\">A practical fit where vacuum compatibility and precise motion are both essential.<\/p>\n<div class=\"sl-application-grid\">\n<article class=\"sl-application-card\"><b>01<\/b><\/p>\n<h3>Semiconductor tools<\/h3>\n<p>Transfer, alignment and process-support motion.<\/p>\n<\/article>\n<article class=\"sl-application-card\"><b>02<\/b><\/p>\n<h3>Vacuum coating<\/h3>\n<p>Positioning axes for deposition equipment.<\/p>\n<\/article>\n<article class=\"sl-application-card\"><b>03<\/b><\/p>\n<h3>Laboratory systems<\/h3>\n<p>Research chambers and analytical instruments.<\/p>\n<\/article>\n<article class=\"sl-application-card\"><b>04<\/b><\/p>\n<h3>Precision stages<\/h3>\n<p>Rotary and linear positioning assemblies.<\/p>\n<\/article>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"sl-consultation\" class=\"sl-fullbleed sl-cta\">\n<div class=\"sl-inner sl-cta-inner\">\n<div>\n<h2>Discuss your Vacuum Stepper Motor-20 and 28 requirement with our engineers.<\/h2>\n<p>Share your load, speed, duty cycle, controller and installation requirements for model selection and integration support.<\/p>\n<\/div>\n<p><a class=\"sl-button\" href=\"https:\/\/spotlight-motor.com\/contact\/\">Request consultation\u00a0\u00a0\u2192<\/a><\/p>\n<\/div>\n<\/section>\n<section class=\"sl-fullbleed sl-related\">\n<div class=\"sl-inner sl-related-inner\">\n<div>\n<h3>Explore related motion solutions<\/h3>\n<p>Compare additional motors, actuators and precision drive products for your next machine design.<\/p>\n<\/div>\n<p><a href=\"https:\/\/spotlight-motor.com\/products\/\">View all products\u00a0\u2192<\/a><\/p>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u771f\u7a7a\u517c\u5bb9\u7535\u673a\uff0c\u53ef\u5b9e\u73b0\u7cbe\u5bc6\u8fd0\u52a8\u548c\u91cd\u590d\u5b9a\u4f4d\uff0c\u5e76\u4fbf\u4e8e\u96c6\u6210\u5230\u4e25\u82db\u7684\u771f\u7a7a\u8bbe\u5907\u4e2d\u3002<\/p>","protected":false},"featured_media":5215,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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motor designed for precise motion, repeatable positioning and integration into demanding vacuum equipment.","_links":{"self":[{"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product\/4475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/comments?post=4475"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/media\/5215"}],"wp:attachment":[{"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/media?parent=4475"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product_brand?post=4475"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product_cat?post=4475"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product_tag?post=4475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}