{"product_id":"so-101-joint-spares-kit-horns-cables","title":"SO-101 Joint Spares Kit: 6 Metal Horn Sets + 17 Bus Servo Cables + Spare 25T Output Disc, for SO-ARM100 \/ SO-ARM101 LeRobot Arms","description":"\u003cp\u003e\u003cstrong\u003eThe SO-101 Joint Spares Kit is the set of parts that wear out or get lost on a LeRobot SO-ARM100 \/ SO-ARM101 arm — the aluminium servo horns at every joint, the 3-pin bus cables between servos, and a spare 25T output disc — packed as one order instead of four.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHorns strip and cables fail at the joint that flexes hardest, and they always fail mid-build. This kit is every wear part of one SO-101 arm in a single bag: six metal horn sets, seventeen bus servo cables in the lengths the arm actually uses, and a spare 25T output disc — enough to re-horn and rewire a whole arm rather than order one part at a time.\u003c\/p\u003e\u003ch2\u003eWhat can you use it for?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRe-horning a whole arm after plastic or worn horns start slipping on the spline\u003c\/li\u003e\n\u003cli\u003eRewiring an arm whose joint cables have failed from repeated flexing\u003c\/li\u003e\n\u003cli\u003eBuilding a second arm from servos you already own\u003c\/li\u003e\n\u003cli\u003eKeeping a complete spares bag in a classroom or lab so a broken arm is a ten-minute fix\u003c\/li\u003e\n\u003cli\u003eAdding a 40 cm run from the base servo to a controller mounted off the bench\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho is it for?\u003c\/h2\u003e\u003cp\u003eAnyone running an SO-101 arm long enough to break something — and labs with several arms, where the part you need is always the one you do not have.\u003c\/p\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eArms: SO-ARM100, SO-ARM101 (LeRobot SO-101), leader and follower; also LeKiwi and OpenDuck joints\u003c\/li\u003e\n\u003cli\u003eServos: Feetech STS3215, STS3250, STS3235, SCS series and other 25T \/ 5.9 mm outputs\u003c\/li\u003e\n\u003cli\u003eCables: 3-pin 5264 (2.5 mm), the connector Feetech bus servos use — not PH2.0 or JST-XH\u003c\/li\u003e\n\u003cli\u003eScrews: M2 horn screws and M3 centre screws included with every horn set\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eContents\u003c\/th\u003e\n\u003ctd\u003e6 × STS3215 main + rear metal horn sets with screws, 12 × mixed 3-pin cables (4 × 15 cm, 4 × 20 cm, 4 × 40 cm), 5 × 40 cm 3-pin cables, 1 × spare 25T metal output disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCovers\u003c\/th\u003e\n\u003ctd\u003eEvery wear part in one SO-101 arm: all six joints re-horned and fully rewired, with spare cable length for a base-to-controller run\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHorn material\u003c\/th\u003e\n\u003ctd\u003e6061-T6 aluminium, anodised; 25T \/ 5.9 mm spline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCable type\u003c\/th\u003e\n\u003ctd\u003e3-pin 5264 (2.5 mm), double-ended, wired 1-to-1 as Feetech STS\/SCS servos require\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShipping weight\u003c\/th\u003e\n\u003ctd\u003e228 g — inside the 250 g tracked-shipping band, so it ships at the lowest international rate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBought separately\u003c\/th\u003e\n\u003ctd\u003e$52.96 as four line items; this kit is $47.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of origin\u003c\/th\u003e\n\u003ctd\u003eChina; packed and shipped from Singapore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eSO-101 Joint Spares Kit:\u003c\/strong\u003e 6 × STS3215 main + rear metal horn sets with screws, 4 × 15 cm + 4 × 20 cm + 4 × 40 cm 3-pin cables, 5 × 40 cm 3-pin cables, 1 × spare 25T metal output disc\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eShipping and returns\u003c\/h2\u003e\u003cp\u003eShips from our warehouse in Singapore with tracking. Parts and accessories: free standard shipping on orders over $25 ($4.99 below) to Canada, the UK, EU, Japan, Korea, Australia and most other countries, 5–15 days; to the United States at carrier cost from $27.99 (SingPost) or $109.99 (DHL Express). Assembled robot-arm kits over 2 kg are built and calibrated to order in Singapore (dispatch in 7–10 business days) and ship worldwide at carrier cost: SingPost Speedpost Priority from $124.99 (10–14 business days) or DHL Express from $229.99 (3–5 business days), shown at checkout. 7-day returns; defective items are replaced or refunded with shipping covered. Import duties, where charged by your country, are paid by the recipient.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eDoes this cover a whole arm?\u003c\/h3\u003e\u003cp\u003eYes — one arm. Six joints, six main + rear horn sets, and enough cable to wire the chain with spares. A leader + follower pair needs two kits.\u003c\/p\u003e\u003ch3\u003eWhy does the kit weigh 228 g?\u003c\/h3\u003e\u003cp\u003eDeliberately. Tracked international shipping is one flat rate up to 250 g, so the kit is built to sit just inside that band rather than tipping into the next one.\u003c\/p\u003e\u003ch3\u003eAre these genuine Feetech horns?\u003c\/h3\u003e\u003cp\u003eThe horns are 6061-T6 aluminium with the 25T \/ 5.9 mm Feetech spline and are sold under our own ArmDojo brand, not as OEM Feetech parts. The cables are Feetech-specification 5264 3-pin.\u003c\/p\u003e\u003ch3\u003eDo I need the rear horn as well as the main horn?\u003c\/h3\u003e\u003cp\u003eFor SO-101 joints, yes. 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; using only the main horn puts all the load on one side.\u003c\/p\u003e\u003ch3\u003eCan I buy the parts separately instead?\u003c\/h3\u003e\u003cp\u003eYes, all three are listed individually. Bought that way they come to $52.96 and ship as separate line items; this kit is $47.99.\u003c\/p\u003e","brand":"ArmDojo","offers":[{"title":"Default Title","offer_id":50864403448047,"sku":"SO101-SPARES-1","price":62.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/5406\/2063\/files\/01_collage_10c1f3bd-2f27-4878-bcba-dac117a42ce6.jpg?v=1789970683","url":"https:\/\/armdojo.com\/products\/so-101-joint-spares-kit-horns-cables","provider":"ArmDojo","version":"1.0","type":"link"}