{"product_id":"feetech-sts3215-metal-servo-horns-25t","title":"Feetech STS3215 Metal Servo Horns 25T, 6061 Aluminium Main + Rear Horn Set and 25T Arms, with Screws","description":"\u003cp\u003e\u003cstrong\u003eThese are anodised 6061-T6 aluminium servo horns with the 25-tooth 5.9 mm spline of Feetech STS3215, STS3250 and SCS servos: matched main and rear horn sets for SO-ARM101 joints, round 25 T output discs and 35 mm single-sided arms, all with mounting screws.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eReplacement and upgrade horns for the STS3215 servos in SO-ARM101, LeKiwi and OpenDuck builds. The plastic horns supplied with cheaper servo lots strip under load; these anodised 6061 horns match the metal ones Hiwonder ships in its kits. Buy the 6-set to re-horn a whole arm.\u003c\/p\u003e\u003ch2\u003eWhat can you use it for?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing stripped plastic horns on cheap STS3215 lots\u003c\/li\u003e\n\u003cli\u003eRe-horning a whole SO-ARM101 arm (6-set)\u003c\/li\u003e\n\u003cli\u003eBuilding custom grippers, pan-tilt heads and linkages with the 35 mm arm\u003c\/li\u003e\n\u003cli\u003eLeKiwi and OpenDuck joints\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho is it for?\u003c\/h2\u003e\u003cp\u003eSO-101 builders who bought bare servos, and anyone whose kit shipped with plastic horns.\u003c\/p\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eServos: Feetech STS3215, STS3250, STS3235, STS5420M, SCS20, SM40BL and other 25 T \/ 5.9 mm outputs\u003c\/li\u003e\n\u003cli\u003eParts: SO-ARM100 \/ SO-ARM101 printed joints (main + rear horn), Hiwonder and Waveshare kits\u003c\/li\u003e\n\u003cli\u003eScrews: M2 horn screws and M3 centre screw included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpline\u003c\/th\u003e\n\u003ctd\u003e25 T, 5.9 mm, Feetech STS3215 \/ STS3250 \/ STS3235 \/ SCS series output shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e6061-T6 aluminium, anodised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMain horn\u003c\/th\u003e\n\u003ctd\u003eRound disc, 4 × M2 holes, with M3 centre screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRear horn\u003c\/th\u003e\n\u003ctd\u003eFree-turning rear disc for the servo's second shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e25T arm\u003c\/th\u003e\n\u003ctd\u003e35 mm single-sided arm, 6 mm thick, M2 \/ M3 holes, 4.3 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded\u003c\/th\u003e\n\u003ctd\u003eMounting screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTS3215 main + rear horn set with screws (1 servo):\u003c\/strong\u003e 1 × main horn, 1 × rear horn, screws\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTS3215 main + rear horn set × 6 (one arm):\u003c\/strong\u003e 6 × main horn, 6 × rear horn, screws\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25T metal output horn (round, single):\u003c\/strong\u003e 1 × 25 T round horn with screws\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25T metal arm 35 mm (single, colour random):\u003c\/strong\u003e 1 × 25 T 35 mm arm with screws (red or blue)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eDo I need the rear horn?\u003c\/h3\u003e\u003cp\u003eYes for SO-101 joints: the printed link is clamped between the main horn on the output shaft and the free-turning rear horn on the servo's second shaft.\u003c\/p\u003e\u003ch3\u003eWill these fit the STS3250?\u003c\/h3\u003e\u003cp\u003eYes, the STS3250 uses the same 25 T spline; only the mounting pattern of the servo body differs.\u003c\/p\u003e","brand":"Glunova Biotech","offers":[{"title":"STS3215 main + rear horn set with screws (1 servo)","offer_id":50760956575983,"sku":"HORN-3215-SET-1","price":9.0,"currency_code":"SGD","in_stock":true},{"title":"STS3215 main + rear horn set × 6 (one arm)","offer_id":50760956608751,"sku":"HORN-3215-SET-6","price":42.0,"currency_code":"SGD","in_stock":true},{"title":"25T metal output horn (round, single)","offer_id":50760956641519,"sku":"HORN-25T-DISC-1","price":7.0,"currency_code":"SGD","in_stock":true},{"title":"25T metal arm 35 mm (single, colour random)","offer_id":50760956674287,"sku":"HORN-25T-ARM-1","price":7.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/5406\/2063\/files\/01_horn_kit.jpg?v=1789437242","url":"https:\/\/armdojo.com\/products\/feetech-sts3215-metal-servo-horns-25t","provider":"ArmDojo","version":"1.0","type":"link"}