{"product_id":"kpower-hbl838-servo","title":"Kpower HBL838 Servo Motor 28kg.cm Brushless Metal Gear, PWM\/TTL\/RS-485 for Robot Arms \u0026 Humanoids","description":"\u003cdiv\u003e\n\u003cdiv\u003e\u003cvideo autoplay=\"autoplay\" controls=\"controls\" loop=\"loop\" muted=\"\" playsinline=\"\" src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/a0d4b6808fbf4ab0a91235f5355be7ea.mp4\" style=\"width: 100%; height: auto; display: block;\"\u003e\n      Your browser does not support the video tag.\n    \u003c\/video\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cvideo autoplay=\"autoplay\" controls=\"controls\" loop=\"loop\" muted=\"\" playsinline=\"\" src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/78b127a991654eaca37267b9f150ab4d.mp4\" style=\"width: 100%; height: auto; display: block;\"\u003e\n      Your browser does not support the video tag.\n    \u003c\/video\u003e\u003c\/div\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Kpower HBL838 is a brushless, digital servo motor designed for multi-scenario motion control in robotics and RC\/mechatronics. It uses a metal gear train and an aluminum alloy case, and supports PWM, TTL, and RS-485 control interfaces. Manufacturer artwork for the HBL Series also states a high-torque brushless motor, high-precision metal gear, and an up to million-cycle lifespan.\u003c\/p\u003e\n\u003cp\u003eLogos shown on manufacturer artwork: ISO, CE, RoHS, EN71.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrushless motor\u003c\/li\u003e\n\u003cli\u003eMetal gear train\u003c\/li\u003e\n\u003cli\u003eAluminum alloy \/ aluminum case\u003c\/li\u003e\n\u003cli\u003eControl protocols listed: PWM | TTL | RS-485\u003c\/li\u003e\n\u003cli\u003eTravel angle range listed: 120° (customizable); standard angles shown: 120°, 180°, 270°, 360°\u003c\/li\u003e\n\u003cli\u003e3-wire servo lead pinout shown: Brown = GND, Red = Vcc, Orange = Signal\u003c\/li\u003e\n\u003cli\u003eServo plug wire types shown: JR, FUTABA\u003c\/li\u003e\n\u003cli\u003eServo horn styles shown: Flat, Cross, Round, Star, Single\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eHBL838\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003eBrushless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGear Material\u003c\/td\u003e\n\u003ctd\u003eMetal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Material\u003c\/td\u003e\n\u003ctd\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStall Torquee (as provided)\u003c\/td\u003e\n\u003ctd\u003e28 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorque (HBL Series table)\u003c\/td\u003e\n\u003ctd\u003e28 kg.cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTorque (manufacturer spec by voltage)\u003c\/td\u003e\n\u003ctd\u003e26.3 kg.cm @ 6.0V; 28.2 kg.cm @ 7.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Torquee (as provided)\u003c\/td\u003e\n\u003ctd\u003e7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load Speed (as provided)\u003c\/td\u003e\n\u003ctd\u003e0.15 s\/60°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed (manufacturer spec by voltage)\u003c\/td\u003e\n\u003ctd\u003e0.16 sec\/60° @ 6.0V; 0.15 sec\/60° @ 7.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage (as provided)\u003c\/td\u003e\n\u003ctd\u003e4.8 ~ 8.4 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Frequency (as provided)\u003c\/td\u003e\n\u003ctd\u003e50 ~ 333 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital servo high-frequency signal compatibility (manufacturer note)\u003c\/td\u003e\n\u003ctd\u003e50–300 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTravel Angle Range (as provided)\u003c\/td\u003e\n\u003ctd\u003e120° (Customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Angle (manufacturer note)\u003c\/td\u003e\n\u003ctd\u003e120°, 180°, 270°, 360°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHorn Gear Spline (as provided)\u003c\/td\u003e\n\u003ctd\u003e25T, phi 5.9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition Sensor (as provided)\u003c\/td\u003e\n\u003ctd\u003ePotentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBall Bearing (as provided)\u003c\/td\u003e\n\u003ctd\u003e2BB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load Current (as provided)\u003c\/td\u003e\n\u003ctd\u003e4500 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (as provided)\u003c\/td\u003e\n\u003ctd\u003e40 x 20 x 38 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (as provided)\u003c\/td\u003e\n\u003ctd\u003e66 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature (as provided)\u003c\/td\u003e\n\u003ctd\u003e-10 ~ 50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Rating (as provided)\u003c\/td\u003e\n\u003ctd\u003eIP42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol (as provided)\u003c\/td\u003e\n\u003ctd\u003ePWM | TTL | RS-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eControl Signal Notes (from manufacturer diagrams)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInput signal pulse width: 20 ms per cycle\u003c\/li\u003e\n\u003cli\u003eExample mapping shown: 0.5 ms = -90°, 1 ms = -45°, 1.5 ms = 0°, 2 ms = 45°, 2.5 ms = 90°\u003c\/li\u003e\n\u003cli\u003eRotation angle\/speed notes shown: standard speed 0.10–0.15 s\/60° (~65 RPM); attainable speed 0.3 s\/60° (~33 RPM)\u003c\/li\u003e\n\u003cli\u003eServo dead band note shown: Analog 1–5 us (our servo: 4 us); Digital 1–3 us (our servo: 2 us)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHumanoid robots\u003c\/li\u003e\n\u003cli\u003eRobotic arms \/ desktop robot arm\u003c\/li\u003e\n\u003cli\u003eExoskeletons\u003c\/li\u003e\n\u003cli\u003eQuadruped robots\u003c\/li\u003e\n\u003cli\u003eAGV vehicles\u003c\/li\u003e\n\u003cli\u003eARU robots\u003c\/li\u003e\n\u003cli\u003eUAV drone \/ fixed wing drone\u003c\/li\u003e\n\u003cli\u003eRC aircraft model\u003c\/li\u003e\n\u003cli\u003e1\/8 and 1\/10 RC car model\u003c\/li\u003e\n\u003cli\u003eIndustrial automation\u003c\/li\u003e\n\u003cli\u003eService robot\u003c\/li\u003e\n\u003cli\u003eTable tennis serving machine\u003c\/li\u003e\n\u003cli\u003eMedical devices (as listed by the manufacturer)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eManuals\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0673\/6848\/5000\/files\/Kpower-HBL838-Drawing.pdf?v=1780716947\" rel=\"noopener\" target=\"_blank\"\u003eKpower-HBL838-Drawing.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0673\/6848\/5000\/files\/Kpower_Servo_Product_Manual-3.pdf?v=1781066839\" rel=\"noopener\" target=\"_blank\"\u003eKpower_Servo_Product_Manual.pdf\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCustomization (ODM) Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCustomization items shown: appearance, torque, protocols, wiring sequences, and more\u003c\/li\u003e\n\u003cli\u003eReliability design options shown: electronic protection, waterproofing, and low-temperature resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"Kpower HBL838 servo motor with aluminum case and metal gear, multiple protocol options and use scenarios\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor.jpg?v=1782381857\"\u003e\u003cp\u003eThe Kpower HBL838 Servo Motor is built for robotics and RC motion control with a durable metal gear train and alloy housing.\u003c\/p\u003e\n\u003cimg alt=\"HBL series servo highlights: high-torque brushless motor, high-precision metal gears, long cycle life\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor.webp?v=1782382387\"\u003e\u003cp\u003eA brushless drive and precision metal gearing help deliver stable torque for repetitive, high-load actuation.\u003c\/p\u003e\n\u003cimg alt=\"HBL servo series comparison table listing HBL830–HBL838 size, torque, speed, and PWM\/TTL\/RS-485 protocol\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor.png?v=1782381868\"\u003e\u003cimg alt=\"Kpower HBL838 servo motor specifications artwork with torque, speed, size, weight, and application list\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_9921f90a-60bf-43a9-b58d-4dc7d4fcfff6.jpg?v=1782381874\"\u003e\u003cp\u003eKey specs include up to 28.2 kg·cm torque at 7.4V, 0.15 s\/60° speed, and a 40×20×38 mm footprint.\u003c\/p\u003e\n\u003cimg alt=\"Servo motor selection notes covering rotation angles, speed ranges, voltage options, and dead band values\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_7b4a69ba-6853-40ba-98f0-172adffffdbe.jpg?v=1782381883\"\u003e\u003cimg alt=\"Servo horn options: flat arm, cross horn, round disc, star horn, and single arm for different mounting needs\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_1209459d-83dc-4297-b6dd-264a880d8c79.jpg?v=1782381890\"\u003e\u003cp\u003eChoose from multiple horn styles to match linkages, wheels, or custom brackets in your build.\u003c\/p\u003e\n\u003cimg alt=\"Servo PWM pulse width chart mapping 0.5–2.5 ms signals to angles and high-frequency compatibility notes\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_03f398ed-9bb1-4be3-b219-27429ff9193e.jpg?v=1782381897\"\u003e\u003cp\u003ePWM control uses a 20 ms cycle with pulse width setting the target position; compatibility is noted for 50–300 Hz signals.\u003c\/p\u003e\n\u003cimg alt=\"Custom servo motor service overview with options for appearance, torque, protocol, wiring, and reliability features\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_c8e7a48d-8a53-40d3-a3d0-7401197d4b81.jpg?v=1782381904\"\u003e\u003cimg alt=\"Stall torque vs speed\/current performance chart with recommendation to rate torque at about one-quarter stall torque\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_3632a910-460a-48bc-b496-9c2782e4f5df.jpg?v=1782381911\"\u003e\u003cimg alt=\"3-wire servo lead pinout: brown GND, red Vcc, orange signal on standard servo connector\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_33d488a9-c243-48f9-ac84-44ead7d9045d.jpg?v=1782381918\"\u003e\u003cp\u003eWiring is straightforward with brown for ground, red for power, and orange for the control signal line.\u003c\/p\u003e\n\u003cimg alt=\"Exploded servo motor parts diagram labeling horn, gears, bearings, motor, sensor, housing, and PCB components\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_57c41bd0-89b0-4b16-9161-6a651864445e.jpg?v=1782381925\"\u003e\u003cimg alt=\"Cross-industry application collage for servo drive modules: robots, automation, logistics, RC, smart home, UAV\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_b2e96d2f-5989-4972-be42-566130c2e992.jpg?v=1782381933\"\u003e\u003cp\u003eA solid fit for humanoid robots, robotic arms, quadrupeds, AGV platforms, and UAV or RC aircraft projects.\u003c\/p\u003e\n\u003cimg alt=\"Product-oriented ODM service process timeline from needs and evaluation through design, sampling, and mass production\" loading=\"lazy\" src=\"https:\/\/robotdoo.com\/cdn\/shop\/files\/Kpower-HBL838-Servo-Motor_fadc4f32-c78a-4992-903e-f28c54d96590.jpg?v=1782381940\"\u003e\n\u003c\/div\u003e","brand":"Kpower","offers":[{"title":"HBL838","offer_id":47919647064294,"sku":"Kpower_HBL838_517bd3-1","price":137.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0954\/0326\/files\/Kpower-HBL838-Servo-Motor-28kgcm-Brushless-Metal-Gear.jpg?v=1782382293","url":"https:\/\/robotdoo.com\/products\/kpower-hbl838-servo","provider":"RobotDoo","version":"1.0","type":"link"}