{"product_id":"kpower-dhv840-servo-motor","title":"Kpower DHV840 Coreless Servo Motor, 40 kg·cm Stall Torque at 7.4 V for R\/C Models and Robots","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe \u003ca class=\"product-context-link\" href=\"https:\/\/rcdrone.top\/collections\/kpower-servo\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003eKpower\u003c\/a\u003e DHV840 is a DHV Series \u003ca class=\"product-context-link\" href=\"https:\/\/rcdrone.top\/collections\/coreless-servos\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003ecoreless servo\u003c\/a\u003e motor for R\/C cars, aircraft, robotic mechanisms, and other controlled-positioning tasks. It combines steel gears with a CNC-machined 7075 aluminum housing, a splined output shaft, and mounting tabs. Specified travel is 120° ± 2°, with stall torque of 40.0 ± 0.20 kg·cm at 7.4 V. Its three-wire lead provides the electrical connection.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCoreless motor with steel gears.\u003c\/li\u003e\n\u003cli\u003eCNC-machined 7075 aluminum housing.\u003c\/li\u003e\n\u003cli\u003eSplined output shaft with a central threaded hole for securing an attached linkage component.\u003c\/li\u003e\n\u003cli\u003eMounting tabs at both ends of the housing.\u003c\/li\u003e\n\u003cli\u003eThree-wire lead with 22 AWG PVC wiring.\u003c\/li\u003e\n\u003cli\u003e900–2100 μs signal range, 2 μs dead band, and 50–333 Hz refresh frequency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eKpower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eDHV840\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eDHV Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGear material\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal range\u003c\/td\u003e\n\u003ctd\u003e900–2100 μs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase material and construction\u003c\/td\u003e\n\u003ctd\u003eCNC-machined 7075 aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor type\u003c\/td\u003e\n\u003ctd\u003eCoreless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e−10 °C to +50 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDead band\u003c\/td\u003e\n\u003ctd\u003e2 μs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTravel angle\u003c\/td\u003e\n\u003ctd\u003e120° ± 2°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefresh frequency\u003c\/td\u003e\n\u003ctd\u003e50–333 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e40 × 20 × 43 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e73 g ± 1 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge and insulation\u003c\/td\u003e\n\u003ctd\u003e22 AWG PVC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput shaft\u003c\/td\u003e\n\u003ctd\u003eSplined, with central threaded hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eTabs at both ends of the housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical lead\u003c\/td\u003e\n\u003ctd\u003eThree-wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePerformance by Test Voltage\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eAt 6.0 V\u003c\/th\u003e\n\u003cth\u003eAt 7.4 V\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load speed\u003c\/td\u003e\n\u003ctd\u003e0.21 ± 0.01 s\/60°\u003c\/td\u003e\n\u003ctd\u003e0.18 ± 0.01 s\/60°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStall torque\u003c\/td\u003e\n\u003ctd\u003e34.0 ± 0.20 kg·cm\u003c\/td\u003e\n\u003ctd\u003e40.0 ± 0.20 kg·cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo-load current\u003c\/td\u003e\n\u003ctd\u003e500 ± 30 mA\u003c\/td\u003e\n\u003ctd\u003e800 ± 30 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStall current\u003c\/td\u003e\n\u003ctd\u003e3500 ± 40 mA\u003c\/td\u003e\n\u003ctd\u003e4200 ± 50 mA\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\u003eR\/C car steering:\u003c\/strong\u003e Drive steering linkages through the splined output shaft, with mounting tabs for attachment to a suitable chassis bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR\/C aircraft control:\u003c\/strong\u003e Actuate control-surface linkages using the specified 120° ± 2° \u003ca class=\"product-context-link\" href=\"https:\/\/rcdrone.top\/collections\/servo-motors\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003eservo\u003c\/a\u003e travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobotic mechanisms:\u003c\/strong\u003e Position articulated linkages using the coreless motor and steel gear train; the voltage-specific torque and speed figures support \u003ca class=\"product-context-link\" href=\"https:\/\/rcdrone.top\/collections\/servo-actuators\/\" style=\"font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:0.15em;\"\u003eactuator\u003c\/a\u003e selection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart-home mechanisms:\u003c\/strong\u003e Move small position-controlled linkages within the specified travel range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedical-device mechanisms:\u003c\/strong\u003e Provide mechanical positioning for device linkages using the tab-mounted housing and splined output shaft.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDocuments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv-840-servo-motor-drawing.pdf?v=1792456636\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eKpower DHV840 Drawing — Drawing (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dmc-026-servo-motor-product-manual-3.pdf?v=1792378938\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eKpower Servo 3 — Manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/hexfellow-hexmotor-4342-p-motor-ocservo-ocs-351-can-drawing.pdf?v=1790605115\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eOCServo OCS 351CAN Drawing — Ocservo Ocs 351 Can Drawing (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Video\u003c\/h2\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\/dd3fec3f21f64dd792275bfe70bcbc3f.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\u003eApplication Examples\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Kpower DHV840 servo with splined shaft, mounting tabs, and application labels\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-8e53446a5d.webp?v=1792456859\"\u003e\u003cfigcaption\u003eThe servo is labeled K-power DHV840. The DHV840 has a three-wire lead exiting the housing.\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"R\/C buggy, crawler, truggy, and monster truck application examples\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-4ce98dfe96.webp?v=1792456871\"\u003e\u003cfigcaption\u003eThe servo application panel lists buggy cars under R\/C cars and trucks. The servo application panel lists RC crawlers under R\/C cars and trucks.\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"General servo application collage with multiple servo designs\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-49fec1ca59.webp?v=1792456875\"\u003e\u003cfigcaption\u003eGeneral servo application collage covering robotics, R\/C models, automation, agriculture, vehicles, electronics, and drones\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"General Kpower drive and control application grid\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-81a5994f53.webp?v=1792456900\"\u003e\u003cfigcaption\u003eKpower application grid covering robotics, smart homes, automation, RC models, drones, agriculture, and electronics\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch3\u003eSetup and Use\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Generic servo reference mapping 0.5–2.5 ms pulses to −90° through 90° angles\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-246fa6befb.webp?v=1792456863\"\u003e\u003cfigcaption\u003eServo-control reference mapping 0.5–2.5 ms pulses to −90° through 90° output angles\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch3\u003eSpecifications and Performance\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"CLS88WP 7.4 V torque, speed, current, and operating-duration chart\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-9f30f84285.webp?v=1792456867\"\u003e\u003cfigcaption\u003eCLS88WP 7.4 V speed and current versus torque chart with color-coded operating-duration limits\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=\"DHV840 feature panel with CNC aluminum case, coreless motor, and 8.4 V label\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-c092f081ed.webp?v=1792456880\"\u003e\u003cfigcaption\u003eThe DHV840 is identified as a DHV Series servo. The DHV Series servo uses a coreless motor.\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Custom servo development graphic with PWM, TTL, RS-485, and CAN labels\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-93498aec8a.webp?v=1792456887\"\u003e\u003cfigcaption\u003eCustom servo development graphic listing customization areas and PWM, TTL, RS-485, and CAN protocols\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Generic exploded servo assembly with housings, gears, seals, motor, and drive PCB\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-51961c8931.webp?v=1792456891\"\u003e\u003cfigcaption\u003eExploded servo assembly with labeled housings, gears, seals, motor, potentiometer, and drive PCB\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch3\u003eOptions and Model Comparison\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Servo horn shapes labeled Flat, Cross, Round, Star, and Single\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-cb74d60a6a.webp?v=1792456883\"\u003e\u003cfigcaption\u003eFive servo horn shapes labeled Flat, Cross, Round, Star, and Single\u003c\/figcaption\u003e\u003c\/figure\u003e\n\u003ch3\u003eInterfaces and Connections\u003c\/h3\u003e\n\u003cfigure class=\"wp-block-image size-full\"\u003e\u003cimg alt=\"Generic three-wire connector guide labeling brown ground, red Vcc, and orange signal\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-409379d911.webp?v=1792456895\"\u003e\u003cfigcaption\u003eThree-wire servo connector diagram identifying brown ground, red Vcc, and orange signal\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=\"ODM development workflow from requirements through testing and production\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/kpower-dhv840-coreless-servo-motor-40-92afaefba7.webp?v=1792456904\"\u003e\u003cfigcaption\u003eODM service workflow from requirements assessment through design, sample testing, and mass production\u003c\/figcaption\u003e\u003c\/figure\u003e","brand":"Kpower","offers":[{"title":"DHV840","offer_id":67819942052064,"sku":"KPO-6E9E80D6","price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/kpower-dhv840-servo-motor-upright-e-27f0473deb-01.webp?v=1792456596","url":"https:\/\/rcdrone.top\/products\/kpower-dhv840-servo-motor","provider":"RCDrone","version":"1.0","type":"link"}