{"product_id":"coupling-4mm-brass-hex-motor-connector","title":"4mm Wheel Connector \/ DC Gear Motor Hex Coupling with Screws","description":"\u003cdiv class=\"product_info\"\u003e\n\u003ch2 class=\"sing--sub-heading\"\u003e\u003cspan style=\"font-size: 18.72px;\"\u003e4mm Hex Coupling for Robot Smart Car Wheel – Brass – 18mm Length\u003c\/span\u003e\u003c\/h2\u003e\nThe \u003cstrong\u003ecoupling\u003c\/strong\u003e used in this design provides a stable connection between the motor and wheel, making it highly effective in builds that require a precise \u003cstrong\u003e4mm shaft coupling\u003c\/strong\u003e. Because of its strong brass construction, this part performs well in educational robots and DIY setups where a reliable \u003cstrong\u003ewheel coupling\u003c\/strong\u003e is essential. Additionally, users working on robotics frequently choose this motor \u003cstrong\u003ecoupling\u003c\/strong\u003e for smooth torque transfer and long-lasting performance. Its robust machining ensures the \u003cstrong\u003e4mm shaft coupling\u003c\/strong\u003e maintains tight alignment during rotation, which helps improve durability in small chassis systems. Makers building smart cars or STEM robots benefit from this \u003cstrong\u003ewheel coupling\u003c\/strong\u003e, as it keeps the wheel hub securely positioned. Furthermore, the structure enables the motor \u003cstrong\u003ecoupling\u003c\/strong\u003e to operate without frequent maintenance. Because it connects directly to DC geared motors, the \u003cstrong\u003e4mm shaft coupling\u003c\/strong\u003e becomes a dependable choice for compact robotic platforms. Students and hobbyists also appreciate how this \u003cstrong\u003ewheel coupling\u003c\/strong\u003e supports stable motor output while keeping vibrations low. As a result, the motor \u003cstrong\u003ecoupling\u003c\/strong\u003e remains ideal for various automation and prototype tasks.\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eTechnical Details\u003c\/h3\u003e\n\u003cul class=\"pro-ds ls-n\"\u003e\n\u003cli\u003eItem Type: Coupling \/ Shaft Connector\u003c\/li\u003e\n\u003cli\u003eMaterial: Brass\u003c\/li\u003e\n\u003cli\u003eInner Diameter (Motor Side): 4 mm\u003c\/li\u003e\n\u003cli\u003eOuter Hex Diameter: 12 mm\u003c\/li\u003e\n\u003cli\u003eThread Size (Top): M4\u003c\/li\u003e\n\u003cli\u003eBody Length: 12 mm\u003c\/li\u003e\n\u003cli\u003eHex Height: 6 mm\u003c\/li\u003e\n\u003cli\u003eTotal Length: 18 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 14 g\u003c\/li\u003e\n\u003cli\u003eSet Screw Type: M3 Grub Screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eFeatures\u003c\/h3\u003e\n\u003cul class=\"pro-ds ls-n\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-strength brass construction\u003c\/strong\u003e for superior durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHexagonal outer design\u003c\/strong\u003e ensures secure wheel attachment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 18mm size\u003c\/strong\u003e suitable for small robotic assemblies.\u003c\/li\u003e\n\u003cli\u003eEasy to install and requires \u003cstrong\u003eno special maintenance\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eTransfers \u003cstrong\u003emotor torque smoothly\u003c\/strong\u003e to the wheel hub.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eApplications\u003c\/h3\u003e\n\u003cul class=\"pro-ds ls-n\"\u003e\n\u003cli\u003eSmart car and robot wheel coupling\u003c\/li\u003e\n\u003cli\u003eDIY and educational robotics projects\u003c\/li\u003e\n\u003cli\u003eAutomation and mini vehicle prototypes\u003c\/li\u003e\n\u003cli\u003eMotor-to-wheel power transmission systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cul class=\"pro-ds ls-n\"\u003e\n\u003cli\u003eColor: Golden (Brass Finish)\u003c\/li\u003e\n\u003cli\u003eMaterial: Brass\u003c\/li\u003e\n\u003cli\u003eShape: Hexagonal\u003c\/li\u003e\n\u003cli\u003eCompatible Motor Shafts: 4mm diameter (Johnson Motor, BO Motor, Encoder Motor)\u003c\/li\u003e\n\u003cli\u003eOperating Torque Range: Suitable for low-power DC geared motors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePackage Includes\u003c\/h3\u003e\n\u003cul class=\"pro-ds ls-n\"\u003e\n\u003cli\u003e1 × 4mm Hex Coupling – Brass – Short Type – 18mm Length\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"Default Title","offer_id":42529402028284,"sku":"KG394","price":69.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/files\/brass-coupling-4mm-hex-connector-robot-1_2.jpg?v=1764220015","url":"https:\/\/kitsguru.com\/es\/products\/coupling-4mm-brass-hex-motor-connector","provider":"KitsGuru","version":"1.0","type":"link"}