{"id":5152,"date":"2026-08-11T05:54:57","date_gmt":"2026-08-11T05:54:57","guid":{"rendered":"https:\/\/spotlight-motor.com\/?post_type=product&#038;p=5152"},"modified":"2026-08-19T10:44:17","modified_gmt":"2026-08-19T10:44:17","slug":"sp20hs-20-mm-hybrid-hollow-shaft-stepper-motor","status":"publish","type":"product","link":"https:\/\/spotlight-motor.com\/zh\/product\/sp20hs-20-mm-hybrid-hollow-shaft-stepper-motor\/","title":{"rendered":"SP20HS 20 mm \u6df7\u5408\u5f0f\u7a7a\u5fc3\u8f74\u6b65\u8fdb\u7535\u673a"},"content":{"rendered":"<style>\nbody.postid-5152{overflow-x:hidden}\nbody.postid-5152 [data-id=\"4e2fba0\"],body.postid-5152 [data-id=\"169d9d5\"],body.postid-5152 [data-id=\"4ab745c\"],body.postid-5152 [data-id=\"a65d5ba\"],body.postid-5152 [data-id=\"77d8c47\"],body.postid-5152 [data-id=\"79389ad\"],body.postid-5152 [data-id=\"8d9b055\"],body.postid-5152 [data-id=\"6b8732b\"],body.postid-5152 [data-id=\"bc89a15\"]{display:none!important}\nbody.postid-5152 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0}.sl-related-inner{align-items:flex-start;flex-direction:column}}\n@media(max-width:767px){.sl-fullbleed{left:auto;width:100%;margin-left:0}.sl-detail-nav{margin-left:0}}\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\">\n<a href=\"https:\/\/spotlight-motor.com\/product\/sp20hs-20-mm-hybrid-hollow-shaft-stepper-motor\/#sl-features\">Product benefits<\/a><br \/>\n<a href=\"https:\/\/spotlight-motor.com\/product\/sp20hs-20-mm-hybrid-hollow-shaft-stepper-motor\/#sl-technical\">Technical data<\/a><br \/>\n<a href=\"https:\/\/spotlight-motor.com\/product\/sp20hs-20-mm-hybrid-hollow-shaft-stepper-motor\/#sl-integration\">Integration<\/a><br \/>\n<a href=\"https:\/\/spotlight-motor.com\/product\/sp20hs-20-mm-hybrid-hollow-shaft-stepper-motor\/#sl-applications\">Applications<\/a><br \/>\n<a href=\"https:\/\/spotlight-motor.com\/product\/sp20hs-20-mm-hybrid-hollow-shaft-stepper-motor\/#sl-consultation\">Request consultation<\/a>\n<\/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\">Compact through-shaft motion<\/div>\n<h2 class=\"sl-title\">20 mm hybrid stepper motor with a 3 mm through bore<\/h2>\n<p class=\"sl-lead\">The SP20HS 20 mm hybrid hollow shaft stepper motor combines a compact square frame, holding torque up to 0.02 N&middot;m and optional EK1 encoder configurations for space-limited rotary assemblies.<\/p>\n<div class=\"sl-feature-grid\">\n<article class=\"sl-feature-card\">\n<div class=\"sl-feature-icon\" aria-hidden=\"true\"><svg viewBox=\"0 0 48 48\"><circle cx=\"24\" cy=\"24\" r=\"15\"\/><circle cx=\"24\" cy=\"24\" r=\"5\"\/><path d=\"M24 4v5M24 39v5M4 24h5M39 24h5\"\/><\/svg><\/div>\n<h3>3 mm through bore<\/h3>\n<p>The &Oslash;3 mm hollow shaft keeps the motor axis open for compact routing through the rotary centerline.<\/p>\n<\/article>\n<article class=\"sl-feature-card\">\n<div class=\"sl-feature-icon\" aria-hidden=\"true\"><svg viewBox=\"0 0 48 48\"><rect x=\"10\" y=\"10\" width=\"28\" height=\"28\" rx=\"3\"\/><path d=\"M16 24h16M24 16v16\"\/><\/svg><\/div>\n<h3>Two torque levels<\/h3>\n<p>Two verified motor lengths provide holding torque choices of 0.014 N&middot;m and 0.02 N&middot;m.<\/p>\n<\/article>\n<article class=\"sl-feature-card\">\n<div class=\"sl-feature-icon\" aria-hidden=\"true\"><svg viewBox=\"0 0 48 48\"><circle cx=\"24\" cy=\"24\" r=\"15\"\/><path d=\"M24 14v10l7 5M12 36l5-5M36 36l-5-5\"\/><\/svg><\/div>\n<h3>Optional EK1 feedback<\/h3>\n<p>EK1 encoder options support selectable resolutions with single-ended or differential output configurations.<\/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<div class=\"sl-spec-grid\">\n<div class=\"sl-spec\"><strong>20 mm<\/strong><span>Frame size<\/span><\/div>\n<div class=\"sl-spec\"><strong>0.014&ndash;0.02 N&middot;m<\/strong><span>Holding torque<\/span><\/div>\n<div class=\"sl-spec\"><strong>&Oslash;3 mm<\/strong><span>Through bore<\/span><\/div>\n<div class=\"sl-spec\"><strong>27.2 \/ 38 mm<\/strong><span>Motor length<\/span><\/div>\n<\/div>\n<div class=\"sl-parameter-layout\">\n<section class=\"sl-parameter-panel sl-parameter-panel--wide\">\n<div class=\"sl-parameter-head\">\n<div><span>Motor<\/span><\/p>\n<h3>Electrical and mechanical parameters<\/h3>\n<\/div>\n<\/div>\n<div class=\"sl-table-scroll\">\n<table class=\"sl-data-table\">\n<caption>SP20HS motor parameters<\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Model<\/th>\n<th scope=\"col\">Rated voltage<\/th>\n<th scope=\"col\">Current<\/th>\n<th scope=\"col\">Resistance<\/th>\n<th scope=\"col\">Inductance<\/th>\n<th scope=\"col\">Holding torque<\/th>\n<th scope=\"col\">Detent torque<\/th>\n<th scope=\"col\">Motor length<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">SP8HS2028<\/th>\n<td>2.55 V<\/td>\n<td>0.5 Arms<\/td>\n<td>5.1 &Omega;<\/td>\n<td>1.5 mH<\/td>\n<td>0.014 N&middot;m<\/td>\n<td>0.002 N&middot;m<\/td>\n<td>27.2 mm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">SP8HS2038<\/th>\n<td>4.4 V<\/td>\n<td>0.5 Arms<\/td>\n<td>8.8 &Omega;<\/td>\n<td>2.7 mH<\/td>\n<td>0.02 N&middot;m<\/td>\n<td>0.004 N&middot;m<\/td>\n<td>38 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"sl-parameter-panel sl-parameter-panel--wide\">\n<div class=\"sl-parameter-head\">\n<div><span>Encoder option<\/span><\/p>\n<h3>EK1 resolution and output codes<\/h3>\n<\/div>\n<\/div>\n<div class=\"sl-table-scroll\">\n<table class=\"sl-data-table\">\n<caption>EK1 encoder resolution and output codes<\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Resolution (PPR)<\/th>\n<th scope=\"col\">100<\/th>\n<th scope=\"col\">108<\/th>\n<th scope=\"col\">120<\/th>\n<th scope=\"col\">125<\/th>\n<th scope=\"col\">128<\/th>\n<th scope=\"col\">200<\/th>\n<th scope=\"col\">250<\/th>\n<th scope=\"col\">256<\/th>\n<th scope=\"col\">300<\/th>\n<th scope=\"col\">360<\/th>\n<th scope=\"col\">400<\/th>\n<th scope=\"col\">500<\/th>\n<th scope=\"col\">1000<\/th>\n<th scope=\"col\">512<\/th>\n<th scope=\"col\">720<\/th>\n<th scope=\"col\">800<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Single-ended code<\/th>\n<td>0<\/td>\n<td>1<\/td>\n<td>2<\/td>\n<td>3<\/td>\n<td>4<\/td>\n<td>5<\/td>\n<td>6<\/td>\n<td>7<\/td>\n<td>8<\/td>\n<td>9<\/td>\n<td>10<\/td>\n<td>11<\/td>\n<td>12<\/td>\n<td>13<\/td>\n<td>14<\/td>\n<td>15<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Differential code<\/th>\n<td>A<\/td>\n<td>B<\/td>\n<td>C<\/td>\n<td>D<\/td>\n<td>E<\/td>\n<td>F<\/td>\n<td>G<\/td>\n<td>H<\/td>\n<td>I<\/td>\n<td>J<\/td>\n<td>K<\/td>\n<td>L<\/td>\n<td>M<\/td>\n<td>N<\/td>\n<td>O<\/td>\n<td>P<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"sl-parameter-panel sl-parameter-panel--wide\">\n<div class=\"sl-parameter-head\">\n<div><span>Encoder option<\/span><\/p>\n<h3>Additional resolution selections<\/h3>\n<\/div>\n<\/div>\n<div class=\"sl-table-scroll\">\n<table class=\"sl-data-table\">\n<caption>Additional encoder resolution selections<\/caption>\n<thead>\n<tr>\n<th scope=\"col\">Output code<\/th>\n<th scope=\"col\">0 \/ A<\/th>\n<th scope=\"col\">1 \/ B<\/th>\n<th scope=\"col\">2 \/ C<\/th>\n<th scope=\"col\">3 \/ D<\/th>\n<th scope=\"col\">4 \/ E<\/th>\n<th scope=\"col\">5 \/ F<\/th>\n<th scope=\"col\">6 \/ G<\/th>\n<th scope=\"col\">7 \/ H<\/th>\n<th scope=\"col\">8 \/ I<\/th>\n<th scope=\"col\">9 \/ J<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Resolution<\/th>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<td>1000 PPR<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<td>2000 PPR<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<td>&mdash;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<\/div>\n<div class=\"sl-figure-grid\">\n<figure class=\"sl-tech-card\">\n<div class=\"sl-figure-frame\"><img decoding=\"async\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/08\/sp20hs-8hs20-mechanical-dimensions-en.png\" alt=\"SP20HS 20 mm hollow shaft stepper motor mechanical dimensions\" title=\"SP20HS 20 mm Hybrid Hollow Shaft Stepper Motor\"><\/div><figcaption>Mechanical dimensions with a 20 mm square frame, &Oslash;5 mm outer shafts, &Oslash;3 mm through bore and four AWG28 lead wires.<\/figcaption><\/figure>\n<figure class=\"sl-tech-card\">\n<div class=\"sl-figure-frame\"><img decoding=\"async\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/08\/sp20hs-8hs20-torque-speed-curves-en.png\" alt=\"SP20HS torque-speed curves for SP8HS2028 and SP8HS2038\" title=\"SP20HS 20 mm Hybrid Hollow Shaft Stepper Motor\"><\/div><figcaption>Torque-speed curves measured at 24 VDC with a DS-OLS8-FRS4 bipolar constant-current chopper drive. Actual performance varies with test conditions and operating load.<\/figcaption><\/figure>\n<figure class=\"sl-tech-card\">\n<div class=\"sl-figure-frame\"><img decoding=\"async\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/08\/sp20hs-ek1-optional-encoder-dimensions-en.png\" alt=\"SP20HS optional EK1 encoder dimensions\" title=\"SP20HS 20 mm Hybrid Hollow Shaft Stepper Motor\"><\/div><figcaption>Optional EK1 encoder dimensions for single-ended and differential output configurations.<\/figcaption><\/figure>\n<\/div>\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\">Integration flexibility<\/div>\n<h2 class=\"sl-title\">Keep the rotation axis open in a compact 20 mm frame.<\/h2>\n<p>The hollow-shaft format supports through-axis routing while the two motor lengths provide a practical torque choice for compact precision equipment.<\/p>\n<ul class=\"sl-checks\">\n<li>&Oslash;3 mm continuous hollow bore<\/li>\n<li>Four-lead bipolar motor connection<\/li>\n<li>Optional EK1 encoder configurations<\/li>\n<\/ul>\n<\/div>\n<div class=\"sl-product-visual\"><img decoding=\"async\" src=\"https:\/\/spotlight-motor.com\/wp-content\/uploads\/2026\/08\/sp20hs-20mm-hybrid-hollow-shaft-stepper-motor.png\" alt=\"SP20HS 20 mm hybrid hollow shaft stepper motor\" title=\"SP20HS 20 mm Hybrid Hollow Shaft Stepper Motor\"><\/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\">Compact rotary motion with a clear center axis<\/h2>\n<p class=\"sl-lead\">The SP20HS is intended for compact assemblies that need controlled rotary positioning and through-axis routing.<\/p>\n<div class=\"sl-application-grid\">\n<article class=\"sl-application-card\"><b>01<\/b><\/p>\n<h3>Optical positioning<\/h3>\n<p>Adjustment mechanisms with a light path or cable routed through the rotation axis.<\/p>\n<\/article>\n<article class=\"sl-application-card\"><b>02<\/b><\/p>\n<h3>Medical instruments<\/h3>\n<p>Compact rotary modules that need organized cable or media routing through the motor center.<\/p>\n<\/article>\n<article class=\"sl-application-card\"><b>03<\/b><\/p>\n<h3>Precision instruments<\/h3>\n<p>Space-limited positioning mechanisms with optional encoder feedback.<\/p>\n<\/article>\n<article class=\"sl-application-card\"><b>04<\/b><\/p>\n<h3>Compact robotics<\/h3>\n<p>Small joints and end-effectors that benefit from an open central routing channel.<\/p>\n<\/article>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"sl-fullbleed sl-section sl-integration\">\n<div class=\"sl-inner sl-integration-grid\">\n<div>\n<div class=\"sl-kicker\">System integration<\/div>\n<h2 class=\"sl-title\">Verified interfaces for mechanical and electrical design<\/h2>\n<p class=\"sl-lead\">Select the motor length, winding and encoder configuration according to the required torque, speed and feedback interface.<\/p>\n<\/div>\n<div class=\"sl-data-list\">\n<div class=\"sl-data-row\"><span>Motor variants<\/span><strong>SP8HS2028 \/ SP8HS2038<\/strong><\/div>\n<div class=\"sl-data-row\"><span>Holding torque<\/span><strong>0.014 \/ 0.02 N&middot;m<\/strong><\/div>\n<div class=\"sl-data-row\"><span>Shaft format<\/span><strong>&Oslash;5 mm outer shaft with &Oslash;3 mm through bore<\/strong><\/div>\n<div class=\"sl-data-row\"><span>Lead wires<\/span><strong>4 leads, AWG28, 320 &plusmn;20 mm<\/strong><\/div>\n<div class=\"sl-data-row\"><span>Encoder option<\/span><strong>EK1, single-ended or differential output<\/strong><\/div>\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 hollow-shaft motion requirement with our engineers.<\/h2>\n<p>Share your load, speed, wiring, encoder and installation requirements for product selection and integration support.<\/p>\n<\/div>\n<p><a class=\"sl-button\" href=\"https:\/\/spotlight-motor.com\/contact\/\">Request consultation&nbsp;&nbsp;&rarr;<\/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 hollow shaft motors<\/h3>\n<p>Compare additional hollow-shaft motor options for compact motion systems.<\/p>\n<\/div>\n<p><a href=\"https:\/\/spotlight-motor.com\/product-category\/intelligent-drive-integrated-solutions\/hollow-shaft-motor\/\">View product category&nbsp;&rarr;<\/a><\/p>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>SP20HS \u7cfb\u5217\u662f\u4e00\u6b3e\u7d27\u51d1\u578b 20 mm \u6df7\u5408\u5f0f\u6b65\u8fdb\u7535\u673a\uff0c\u914d\u5907 3 mm \u8d2f\u901a\u5f0f\u7a7a\u5fc3\u8f74\u3001\u6700\u9ad8 0.02 N\u00b7m \u4fdd\u6301\u8f6c\u77e9\u53ca\u53ef\u9009 EK1 \u7f16\u7801\u5668\uff0c\u9002\u7528\u4e8e\u7a7a\u95f4\u53d7\u9650\u7684\u8fd0\u52a8\u7ec4\u4ef6\u3002<\/p>","protected":false},"featured_media":5153,"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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SP20HS series is a compact 20 mm hybrid stepper motor with a 3 mm through hollow shaft, holding torque up to 0.02 N\u00b7m and optional EK1 encoder configurations for space-limited motion assemblies.","_links":{"self":[{"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product\/5152","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=5152"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/media\/5153"}],"wp:attachment":[{"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/media?parent=5152"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product_brand?post=5152"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product_cat?post=5152"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/spotlight-motor.com\/zh\/wp-json\/wp\/v2\/product_tag?post=5152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}