{"product_id":"kingmax-bls4309-brushless-hv-waterproof-servo","title":"KingMax BLS4309 Brushless HV Waterproof Servo – 48kg High Torque Digital Servo","description":"\u003ch2\u003eKingMax BLS4309 Brushless HV Waterproof Digital Servo\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eKingMax BLS4309\u003c\/strong\u003e is a high-performance brushless high-voltage digital servo engineered for giant-scale RC aircraft requiring an excellent balance of torque, speed, durability, and precision control.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing a high-quality brushless motor, high-precision steel gears, full CNC aluminum case construction, waterproof protection, and dual ball bearings, the BLS4309 delivers up to \u003cstrong\u003e48kg-cm (666.72 oz-in)\u003c\/strong\u003e of torque at 8.4V while maintaining fast response speeds as low as \u003cstrong\u003e0.08 sec\/60°\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe BLS4309 is an excellent choice for giant-scale aerobatic aircraft, large warbirds, turbine jets, and high-load control surface applications where both strong holding power and fast response are important.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eHigh-performance digital standard servo\u003c\/li\u003e\n\u003cli\u003eHigh-precision steel gears\u003c\/li\u003e\n\u003cli\u003eFull CNC aluminum hull and structure\u003c\/li\u003e\n\u003cli\u003eHigh-quality brushless motor\u003c\/li\u003e\n\u003cli\u003eDual ball bearings (2BB)\u003c\/li\u003e\n\u003cli\u003eWaterproof construction\u003c\/li\u003e\n\u003cli\u003eStandard 25T spline\u003c\/li\u003e\n\u003cli\u003eWide voltage operation from 5.0V to 8.4V\u003c\/li\u003e\n\u003cli\u003eDesigned for demanding giant-scale aircraft applications\u003c\/li\u003e\n\u003cli\u003eLoad-tested for high-torque operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eServo Arm Compatibility\u003c\/h2\u003e\n\n\u003cp\u003e\nThe \u003cstrong\u003eBLS4309\u003c\/strong\u003e uses a standard \u003cstrong\u003e25-tooth output spline\u003c\/strong\u003e. We have verified compatibility with Futaba-style 25T servo arms and accessories, including most aftermarket aluminum, carbon fiber, and composite servo arms designed around the popular 25T standard.\n\u003c\/p\u003e\n\n\u003ch2\u003eSpeed Performance\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px;\"\u003eVoltage\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px;\"\u003eOperating Speed\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e5.0V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e0.14 sec\/60°\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e6.0V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e0.11 sec\/60°\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e7.4V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e0.09 sec\/60°\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e8.4V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e0.08 sec\/60°\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTorque Performance\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px;\"\u003eVoltage\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px;\"\u003eStall Torque\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e5.0V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e30.0kg-cm (416.70 oz-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e6.0V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e35.0kg-cm (486.15 oz-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e7.4V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e43.0kg-cm (597.27 oz-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e8.4V\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e48.0kg-cm (666.72 oz-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eBLS4309\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eServo Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eDigital Standard Servo\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eGear Train\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eSteel Gears\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eMotor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eBrushless Motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eCase Construction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eFull CNC Aluminum Hull and Structure\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eBearings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eDual Ball Bearings (2BB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eSpline\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eStandard 25T\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eDead Band\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e2μs Default\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eWaterproof\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eDC 5.0V–8.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eRated Working Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eDC 7.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eWorking Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e1520μs \/ 330Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eWorking Angle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e±63° @ 800μs–2200μs\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e40 × 20 × 39.1mm (1.57 × 0.79 × 1.52 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e85g (2.99 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eConnector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eJR Connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eWire Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e310mm (12.09 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eWorking Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e-10°C to +50°C (14°F to 122°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e-20°C to +60°C (-4°F to 140°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eRecommended Applications\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e60cc–120cc gas-powered RC aircraft\u003c\/li\u003e\n\u003cli\u003eLarge giant-scale sport aircraft\u003c\/li\u003e\n\u003cli\u003eIMAC and aerobatic aircraft\u003c\/li\u003e\n\u003cli\u003eLarge warbirds\u003c\/li\u003e\n\u003cli\u003eSport jets and turbine aircraft\u003c\/li\u003e\n\u003cli\u003eHeavy-duty elevator installations\u003c\/li\u003e\n\u003cli\u003eLarge rudder applications\u003c\/li\u003e\n\u003cli\u003eHigh-load aileron installations\u003c\/li\u003e\n\u003cli\u003eAircraft requiring strong holding power and fast response\u003c\/li\u003e\n\u003cli\u003eLarge-scale aircraft utilizing high-voltage servo systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the BLS4309?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eUp to 48kg-cm (666.72 oz-in) torque at 8.4V\u003c\/li\u003e\n\u003cli\u003eFast response down to 0.08 sec\/60°\u003c\/li\u003e\n\u003cli\u003eDesigned for demanding giant-scale aircraft control surfaces\u003c\/li\u003e\n\u003cli\u003eLoad-tested for high-torque applications\u003c\/li\u003e\n\u003cli\u003eBrushless motor for long service life and efficiency\u003c\/li\u003e\n\u003cli\u003eHigh-precision steel gears for heavy-duty performance\u003c\/li\u003e\n\u003cli\u003eWaterproof construction for demanding field conditions\u003c\/li\u003e\n\u003cli\u003eFull CNC aluminum case for strength and heat dissipation\u003c\/li\u003e\n\u003cli\u003eCompatible with verified Futaba-style 25T servo arms and accessories\u003c\/li\u003e\n\u003cli\u003eExcellent balance of speed, torque, and holding power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIncludes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eKingMax BLS4309 Brushless HV Waterproof Digital Servo\u003c\/li\u003e\n\u003cli\u003eManufacturer-supplied servo accessories\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kingmax","offers":[{"title":"Default Title","offer_id":48296474378462,"sku":"BLS4309","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/1436\/6686\/files\/bls4309_1.png?v=1780244359","url":"https:\/\/www.gator-rc.com\/products\/kingmax-bls4309-brushless-hv-waterproof-servo","provider":"Gator RC","version":"1.0","type":"link"}