{"product_id":"sito-drive-hs-20-iii-reducer","title":"SITO DRIVE HS-20-III Reducer, 30-120 Ratios, 15-40 Nm Rated Torque for Robotics","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe \u003ca class=\"product-context-link\" href=\"https:\/\/rcdrone.top\/collections\/sito-drive\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003eSITO DRIVE\u003c\/a\u003e HS-20-III reducer is offered in 30, 50, 80, 100, and 120 speed-ratio options for \u003ca class=\"product-context-link\" href=\"https:\/\/rcdrone.top\/collections\/robotics\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003erobotics\u003c\/a\u003e applications. At a 2000 r\/min input, rated torque ranges from 15 to 40 Nm by ratio, while allowable input speed is 6500 rpm and allowable average speed is 3500 rpm. Select the ratio according to the required reduction and the corresponding torque values.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFive selectable transmission ratios: 30, 50, 80, 100, and 120.\u003c\/li\u003e\n\u003cli\u003eBacklash is ≤20 arcsec for ratios 30 and 50, and ≤10 arcsec for ratios 80, 100, and 120.\u003c\/li\u003e\n\u003cli\u003eMoment of inertia is 0.193 × 10⁻⁴ kg·m² for all listed ratio options.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eRatio 30\u003c\/th\u003e\n\u003cth\u003eRatio 50\u003c\/th\u003e\n\u003cth\u003eRatio 80\u003c\/th\u003e\n\u003cth\u003eRatio 100\u003c\/th\u003e\n\u003cth\u003eRatio 120\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eHS-20-III\u003c\/td\u003e\n\u003ctd\u003eHS-20-III\u003c\/td\u003e\n\u003ctd\u003eHS-20-III\u003c\/td\u003e\n\u003ctd\u003eHS-20-III\u003c\/td\u003e\n\u003ctd\u003eHS-20-III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission ratio\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated torque at 2000 r\/min input\u003c\/td\u003e\n\u003ctd\u003e15 Nm\u003c\/td\u003e\n\u003ctd\u003e25 Nm\u003c\/td\u003e\n\u003ctd\u003e34 Nm\u003c\/td\u003e\n\u003ctd\u003e40 Nm\u003c\/td\u003e\n\u003ctd\u003e40 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak torque allowed during start\/stop\u003c\/td\u003e\n\u003ctd\u003e27 Nm\u003c\/td\u003e\n\u003ctd\u003e56 Nm\u003c\/td\u003e\n\u003ctd\u003e74 Nm\u003c\/td\u003e\n\u003ctd\u003e82 Nm\u003c\/td\u003e\n\u003ctd\u003e87 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum allowable average load torque\u003c\/td\u003e\n\u003ctd\u003e20 Nm\u003c\/td\u003e\n\u003ctd\u003e34 Nm\u003c\/td\u003e\n\u003ctd\u003e47 Nm\u003c\/td\u003e\n\u003ctd\u003e49 Nm\u003c\/td\u003e\n\u003ctd\u003e49 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstantaneous maximum torque\u003c\/td\u003e\n\u003ctd\u003e50 Nm\u003c\/td\u003e\n\u003ctd\u003e98 Nm\u003c\/td\u003e\n\u003ctd\u003e127 Nm\u003c\/td\u003e\n\u003ctd\u003e147 Nm\u003c\/td\u003e\n\u003ctd\u003e147 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum allowable input speed\u003c\/td\u003e\n\u003ctd\u003e6500 rpm\u003c\/td\u003e\n\u003ctd\u003e6500 rpm\u003c\/td\u003e\n\u003ctd\u003e6500 rpm\u003c\/td\u003e\n\u003ctd\u003e6500 rpm\u003c\/td\u003e\n\u003ctd\u003e6500 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAllowable average speed\u003c\/td\u003e\n\u003ctd\u003e3500 rpm\u003c\/td\u003e\n\u003ctd\u003e3500 rpm\u003c\/td\u003e\n\u003ctd\u003e3500 rpm\u003c\/td\u003e\n\u003ctd\u003e3500 rpm\u003c\/td\u003e\n\u003ctd\u003e3500 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMoment of inertia\u003c\/td\u003e\n\u003ctd\u003e0.193 × 10⁻⁴ kg·m²\u003c\/td\u003e\n\u003ctd\u003e0.193 × 10⁻⁴ kg·m²\u003c\/td\u003e\n\u003ctd\u003e0.193 × 10⁻⁴ kg·m²\u003c\/td\u003e\n\u003ctd\u003e0.193 × 10⁻⁴ kg·m²\u003c\/td\u003e\n\u003ctd\u003e0.193 × 10⁻⁴ kg·m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklash\u003c\/td\u003e\n\u003ctd\u003e≤20 arcsec\u003c\/td\u003e\n\u003ctd\u003e≤20 arcsec\u003c\/td\u003e\n\u003ctd\u003e≤10 arcsec\u003c\/td\u003e\n\u003ctd\u003e≤10 arcsec\u003c\/td\u003e\n\u003ctd\u003e≤10 arcsec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumanoid robots and exoskeletons:\u003c\/strong\u003e choose the ratio and corresponding torque rating for joint-drive reduction requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobotic arms and quadruped robots:\u003c\/strong\u003e use the listed backlash and speed limits when assessing motion-axis drivetrain requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAGV vehicles and ARU robots:\u003c\/strong\u003e select from the available reduction ratios to suit the required drive-speed reduction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDocuments\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/sito-drive-hs-20-iii-reducer-stp.step?v=1791388591\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eSITO HS 20 III Reducer — 3D Model (STEP)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/sito-drive-hs-20-iii-reducer-draw-product-installation-drawing.pdf?v=1791388597\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eSITO HS 20 III Draw instalation drawing — Installation Drawing (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eVisual Details\u003c\/h2\u003e\u003ch3\u003eProduct Video\u003c\/h3\u003e\u003cfigure class=\"tophitek-product-video-block\"\u003e\u003cvideo autoplay=\"autoplay\" class=\"tophitek-product-video\" controls=\"controls\" loop=\"loop\" muted=\"\" playsinline=\"\" src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/c67a5b35bde34559932cc03793471a77.mp4\" style=\"display:block;width:auto;max-width:100%;height:auto;margin:0 auto\"\u003eYour browser does not support the video tag.\u003c\/video\u003e\u003c\/figure\u003e\u003cfigure class=\"tophitek-product-video-block\"\u003e\u003cvideo autoplay=\"autoplay\" class=\"tophitek-product-video\" controls=\"controls\" loop=\"loop\" muted=\"\" playsinline=\"\" src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/2092e1fd6fdc46e38630b7a7681b3fd5.mp4\" style=\"display:block;width:auto;max-width:100%;height:auto;margin:0 auto\"\u003eYour browser does not support the video tag.\u003c\/video\u003e\u003c\/figure\u003e\u003cfigure class=\"tophitek-product-video-block\"\u003e\u003cvideo autoplay=\"autoplay\" class=\"tophitek-product-video\" controls=\"controls\" loop=\"loop\" muted=\"\" playsinline=\"\" src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/dcd0693fb83a4e1099c31879cefe2ce4.mp4\" style=\"display:block;width:auto;max-width:100%;height:auto;margin:0 auto\"\u003eYour browser does not support the video tag.\u003c\/video\u003e\u003c\/figure\u003e\n\u003ch3\u003eSpecifications and Performance\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"SITO strain wave reducer family graphic with ratio and torque ranges\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/sito-drive-hs-20-iii-reducer-30-120-ra-d4974ae473.webp?v=1791388667\"\u003e\u003cfigcaption\u003eReduction ratios are stated as 30, 50, 80, 100, and 120.\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch3\u003eAdditional Product Details\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Robotic hand graphic labelled CS Mini-2.5 reducer\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/sito-drive-hs-20-iii-reducer-30-120-ra-e46b1512f3.webp?v=1791388671\"\u003e\u003cfigcaption\u003eRobotic hand promotional graphic labelled CS Mini-2.5 strain wave drive reducer\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Reducer manufacturing promotional graphic\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/sito-drive-hs-20-iii-reducer-30-120-ra-cda5f2a522.webp?v=1791388683\"\u003e\u003cfigcaption\u003eReducer manufacturing and quality-control promotional graphic\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch3\u003eFeatures and Design\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Compact reducer size comparison graphic\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/sito-drive-hs-20-iii-reducer-30-120-ra-d95fd71d88.webp?v=1791388674\"\u003e\u003cfigcaption\u003eCompact strain wave reducer comparison graphic with 11 mm diameter claim\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch3\u003eApplication Examples\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Robotic arm and harmonic reducer application graphic\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/sito-drive-hs-20-iii-reducer-30-120-ra-a7e1245821.webp?v=1791388678\"\u003e\u003cfigcaption\u003eRobotic arm illustration describing harmonic reducers as robot core components\u003c\/figcaption\u003e\u003c\/figure\u003e","brand":"SITO DRIVE","offers":[{"title":"30","offer_id":67748101947616,"sku":"SIT-ADD31A98","price":384.72,"currency_code":"USD","in_stock":true},{"title":"50","offer_id":67748101980384,"sku":"SIT-8BD6F25C","price":396.24,"currency_code":"USD","in_stock":true},{"title":"80","offer_id":67748102013152,"sku":"SIT-A6DE36D3","price":409.2,"currency_code":"USD","in_stock":true},{"title":"100","offer_id":67748102045920,"sku":"SIT-F2D93BB5","price":423.6,"currency_code":"USD","in_stock":true},{"title":"120","offer_id":67748102078688,"sku":"SIT-5705B6E5","price":438.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/sito-drive-hs-20-iii-reducer-keyed-3b7be418a2-01.webp?v=1791388550","url":"https:\/\/rcdrone.top\/products\/sito-drive-hs-20-iii-reducer","provider":"RCDrone","version":"1.0","type":"link"}