{"id":48,"date":"2026-08-20T08:26:00","date_gmt":"2026-08-20T08:26:00","guid":{"rendered":"https:\/\/www.sanyoogear.com\/blog\/?p=48"},"modified":"2026-10-19T08:26:24","modified_gmt":"2026-10-19T08:26:24","slug":"planetary-gear-reducer-selection-for-backlash-torque-and-gear-ratio","status":"publish","type":"post","link":"https:\/\/www.sanyoogear.com\/blog\/planetary-gear-reducer-selection-for-backlash-torque-and-gear-ratio\/","title":{"rendered":"Planetary Gear Reducer Selection for Backlash, Torque and Gear Ratio"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Backlash in Precision Applications<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Backlash, or lost motion on reversal, is a key accuracy parameter in planetary gear reducer selection. It affects positioning accuracy and repeatability and is generally specified in arcminutes (arcmin). A smaller value indicates less lost motion. Requirements vary considerably: general material handling and conveying can tolerate more backlash, while precision positioning, robot joints and measuring equipment require low-backlash designs.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Rated Torque and Acceleration Torque<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Torque specifications distinguish rated torque from acceleration (peak) torque. Rated torque is the output torque that can be sustained under continuous operating conditions; acceleration torque is the short-duration torque capacity. Continuous-duty applications must be checked against the rated torque. Applications with frequent starts and stops or rapid acceleration also require verification of acceleration torque and the permitted load cycle; checking the peak value alone is insufficient.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Reference Technical Specifications<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Parameter<\/strong><\/td><td><strong>Typical range<\/strong><\/td><td><strong>Description<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Single-stage ratio<\/td><td>3:1\u201310:1<\/td><td>Multiple stages provide higher reduction ratios<\/td><\/tr><tr><td>Backlash (precision grade)<\/td><td>1\u20135 arcmin<\/td><td>P0 grade: 1\u20133 arcmin; P1 grade: 3\u20135 arcmin<\/td><\/tr><tr><td>Ingress protection rating<\/td><td>IP65<\/td><td>For demanding operating environments<\/td><\/tr><tr><td>Gear material<\/td><td>20CrMnTi<\/td><td>Carburised and hardened; tooth surface hardness 58\u201362 HRC<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Selecting a Ratio and Output Speed<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Single-stage planetary ratios typically range from 3:1 to 10:1. Multiple stages provide higher reduction ratios. Select the ratio from the motor\u2019s rated speed and the required machine output speed. Because multi-stage arrangements are less efficient than single-stage designs, use as few stages as practicable while meeting the required reduction ratio.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Planetary Gear Reducer Selection Support<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Send the required accuracy, load torque, speed and installation conditions to SANYOO\u2019s technical team for selection assistance. Visit www.sanyoogear.com for further technical information.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Backlash in Precision Applications Backlash, or lost motion on reversal, is a key accuracy parameter in planetary gear reducer selection. It affects positioning accuracy and repeatability and is\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-48","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/posts\/48","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=48"}],"version-history":[{"count":1,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":49,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/posts\/48\/revisions\/49"}],"wp:attachment":[{"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/media?parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/categories?post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sanyoogear.com\/blog\/wp-json\/wp\/v2\/tags?post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}