{"product_id":"yamaha-kn5-m1821-004-robot-harmonic-drive-assembly","title":"Yamaha KN5-M1821-004 Robot Harmonic Drive Assembly","description":"\u003ch3 data-section-id=\"nq8ynu\" data-start=\"0\" data-end=\"18\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"19\" data-end=\"397\"\u003eThe Yamaha KN5-M1821-004 is a \u003ca href=\"https:\/\/plgautomation.com\/collections\/drives-motor-control\"\u003eharmonic drive\u003c\/a\u003e assembly used in Yamaha SCARA robot systems as a precision speed reduction unit for robotic joint motion, commonly installed in YK-series robots (X\/R axis assemblies), and purchased by maintenance teams, OEMs, and integrators for replacement of worn reducers and restoration of accurate robotic positioning and torque transmission.\u003c\/p\u003e\n\u003ch3 data-section-id=\"plkbhx\" data-start=\"399\" data-end=\"418\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"419\" data-end=\"924\"\u003eThe Yamaha KN5-M1821-004 harmonic drive is used in industrial automation environments where high precision, zero backlash, and compact torque transmission are required. It is commonly deployed in SCARA robots for pick-and-place systems, assembly lines, and semiconductor equipment where repeatability and smooth motion are critical. This unit specifically functions as a speed reduction gear within robot axes, enabling accurate positioning and controlled movement.\u003c\/p\u003e\n\u003ch3 data-section-id=\"68ulmp\" data-start=\"926\" data-end=\"957\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"958\" data-end=\"1835\"\u003e• Manufacturer: Yamaha \/ Harmonic Drive type assembly\u003cbr data-start=\"1011\" data-end=\"1014\"\u003e• Model: KN5-M1821-004\u003cbr data-start=\"1036\" data-end=\"1039\"\u003e• Product Type: Harmonic drive assembly (strain wave gear reducer)\u003cbr data-start=\"1105\" data-end=\"1108\"\u003e• Function: Speed reduction and torque multiplication\u003cbr data-start=\"1161\" data-end=\"1164\"\u003e• Application: Yamaha SCARA robots (YK700X, YK800X, YK1000X R-axis series) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1276\" data-end=\"1279\"\u003e• Gear Type: Strain wave (flexspline\/circular spline mechanism)\u003cbr data-start=\"1342\" data-end=\"1345\"\u003e• Backlash: Near-zero (precision robotic motion)\u003cbr data-start=\"1393\" data-end=\"1396\"\u003e• Design: Compact, high torque-to-size ratio\u003cbr data-start=\"1440\" data-end=\"1443\"\u003e• Integration: Mounted within robot joint assembly\u003cbr data-start=\"1493\" data-end=\"1496\"\u003e• Components: Wave generator, flexspline, circular spline\u003cbr data-start=\"1553\" data-end=\"1556\"\u003e• Lubrication: Requires specified Yamaha grease for longevity \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cbr data-start=\"1655\" data-end=\"1658\"\u003e• Duty Cycle: Continuous industrial robotic operation\u003cbr data-start=\"1711\" data-end=\"1714\"\u003e• Application Class: Robotics \/ semiconductor \/ precision automation\u003cbr data-start=\"1782\" data-end=\"1785\"\u003e• Status: OEM robotic component \/ legacy support\u003c\/p\u003e\n\u003ch3 data-section-id=\"1ln9bp8\" data-start=\"1837\" data-end=\"1863\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"1864\" data-end=\"1972\"\u003e• Yamaha KN5-M1821-001\u003cbr data-start=\"1886\" data-end=\"1889\"\u003e• Yamaha KN4-M1821-007\u003cbr data-start=\"1911\" data-end=\"1914\"\u003e• Harmonic Drive SHF-20-50 equivalent\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"New","offer_id":51733883158830,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_72249a77-e858-4827-96bd-81345f0453a1.jpg?v=1770604069","url":"https:\/\/plgautomation.com\/products\/yamaha-kn5-m1821-004-robot-harmonic-drive-assembly","provider":"PLG Automation ","version":"1.0","type":"link"}