{"id":6625,"date":"2026-02-06T11:25:14","date_gmt":"2026-02-06T10:25:14","guid":{"rendered":"https:\/\/kammerer-gewinde.zold.at\/lexicon\/self-locking\/"},"modified":"2026-04-14T17:05:15","modified_gmt":"2026-04-14T15:05:15","slug":"self-locking","status":"publish","type":"lexicon","link":"https:\/\/kammerer-gewinde.zold.at\/en\/lexicon\/self-locking\/","title":{"rendered":"Self-locking"},"content":{"rendered":"\n<p>Self-locking refers to the property of a mechanical system in which an applied load does not trigger a reverse movement when the drive is not active. The component or drive therefore remains stationary under load without the need for additional brakes or holding devices. <\/p>\n\n<p>Self-locking is particularly important for:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Secure holding of loads<\/li>\n\n\n\n<li>Energy savings, as no holding torque is required<\/li>\n\n\n\n<li>Protection against unintentional back-driving in the event of power or drive failure<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Development of self-locking<\/h2>\n\n<p>Self-locking results from the ratio of friction to lead in the system: high friction angle, small lead angle.<\/p>\n\n<p>The following applies to screw drives:<br\/>self-locking if<\/p>\n\n<div class=\"wp-block-math\"><math display=\"block\"><semantics><mrow><mi>\u03b1<\/mi><mo>\u2264<\/mo><mi>\u03c1<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\u03b1 \u2264 \u03c1<\/annotation><\/semantics><\/math><\/div>\n\n<p>\u03b1 = lead angle<br\/>\u03c1 = friction angle<\/p>\n\n<h3 class=\"wp-block-heading\">Examples<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>Trapezoidal screw drives:<\/strong> Often self-locking<\/li>\n\n\n\n<li><strong>Buttress threads:<\/strong> Self-locking in the direction of load<\/li>\n\n\n\n<li><strong>Worm gears:<\/strong> Often self-locking<\/li>\n\n\n\n<li><strong>Ball screws:<\/strong> Generally not self-locking due to low friction<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Advantages &amp; Disadvantages<\/h2>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p><strong>Advantages<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Load securing without additional components<\/li>\n\n\n\n<li>Simple construction<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p><strong>Disadvantages<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lower efficiency<\/li>\n\n\n\n<li>Higher friction and wear<\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Self-locking refers to the property of a mechanical system in which an applied load does not trigger a reverse movement when the drive is not active. The component or drive therefore remains stationary under load without the need for additional brakes or holding devices. Self-locking is particularly important for: Development of self-locking Self-locking results from [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"lexiconkategorie":[],"class_list":["post-6625","lexicon","type-lexicon","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/lexicon\/6625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/lexicon"}],"about":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/types\/lexicon"}],"wp:attachment":[{"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/media?parent=6625"}],"wp:term":[{"taxonomy":"lexiconkategorie","embeddable":true,"href":"https:\/\/kammerer-gewinde.zold.at\/en\/wp-json\/wp\/v2\/lexiconkategorie?post=6625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}