{"id":28,"date":"2026-01-05T08:21:00","date_gmt":"2026-01-05T08:21:00","guid":{"rendered":"https:\/\/www.sanyoogear.com\/blog\/?p=28"},"modified":"2026-10-19T08:21:51","modified_gmt":"2026-10-19T08:21:51","slug":"s-series-helical-worm-gear-reducer-self-locking-characteristics-and-ratio-selection","status":"publish","type":"post","link":"https:\/\/www.sanyoogear.com\/blog\/s-series-helical-worm-gear-reducer-self-locking-characteristics-and-ratio-selection\/","title":{"rendered":"S Series Helical-Worm Gear Reducer Self-Locking Characteristics and Ratio Selection"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">S Series Specifications<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The S series covers power ratings of 0.12\u201322 kW, torque ratings of 10\u20134,890 N\u00b7m and output speeds of 0.12\u2013397 rpm. Standard gear ratios range from 10.27 to 230.48; combinations with the R series can reach 8,608 or higher. Configuration options include solid-shaft output (S), shaft mounting (SA), flange mounting (SF\/SAF) and shaft input (SS).<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">S Series Model Reference<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Model<\/strong><\/td><td><strong>Gear ratio range<\/strong><\/td><td><strong>Power range (kW)<\/strong><\/td><td><strong>Permissible torque (N\u00b7m)<\/strong><\/td><\/tr><\/thead><tbody><tr><td>S37<\/td><td>10.27\u2013165.71<\/td><td>0.18\u20130.75<\/td><td>90<\/td><\/tr><tr><td>S47<\/td><td>11.46\u2013244.74<\/td><td>0.18\u20131.5<\/td><td>170<\/td><\/tr><tr><td>S57<\/td><td>10.78\u2013196.21<\/td><td>0.18\u20133<\/td><td>300<\/td><\/tr><tr><td>S67<\/td><td>11.55\u2013227.20<\/td><td>0.25\u20135.5<\/td><td>520<\/td><\/tr><tr><td>S77<\/td><td>9.96\u2013241.09<\/td><td>0.55\u20137.5<\/td><td>1270<\/td><\/tr><tr><td>S87<\/td><td>11.83\u2013223.26<\/td><td>0.75\u201315<\/td><td>2280<\/td><\/tr><tr><td>S97<\/td><td>12.75\u2013230.48<\/td><td>1.5\u201322<\/td><td>4000<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Applications Where Self-Locking Matters<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Resistance to back-driving can be useful in lifting equipment, inclined conveyors where reverse movement must be controlled, and other process machinery. At suitable ratios, the S series worm stage may provide static self-locking. For suspended loads, this characteristic must not be treated as a substitute for the complete machine\u2019s braking and safety functions.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Balancing Gear Ratio and Efficiency<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">S series ratio selection requires a balance between speed reduction, self-locking behaviour and transmission efficiency. Higher ratios can favour self-locking but typically have lower efficiency. Applications that do not require self-locking may use a more efficient ratio configuration. SANYOO\u2019s technical team can advise on the available options for the application.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Complete S Series Technical Information<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Visit www.sanyoogear.com to download the S series catalogue or contact the technical team. Please provide the required power and output torque, input and output speeds, self-locking requirements, duty cycle and environmental conditions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>S Series Specifications The S series covers power ratings of 0.12\u201322 kW, torque ratings of 10\u20134,890 N\u00b7m and output speeds of 0.12\u2013397 rpm. Standard gear ratios range from\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-28","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/posts\/28","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/comments?post=28"}],"version-history":[{"count":1,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/posts\/28\/revisions"}],"predecessor-version":[{"id":29,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/posts\/28\/revisions\/29"}],"wp:attachment":[{"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/media?parent=28"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/categories?post=28"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/tags?post=28"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}