Hiwonder LeArm 6-DOF Robotic Arm Kit
Open-source 6-servo arm with claw, PC/app control and tutorials — the classic "first serious arm" for makers.
Best for: Your first programmable 6-DOF arm
Parts & kits
Shop robotic arm parts & kits
Every component you need to build a robotic arm at home, grouped by what it does and picked to match our build guides. Tap through to check the live price on Amazon.
New to this? Read the complete robotic arm parts guide first — it explains what each component does and how to choose it.
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🦾 Robotic Arm Kits The best robotic arm kits for adults, students and beginners — from STEM sets to 6-DOF programmable arms you can build in an afternoon. 4 picks → 
⚙️ Servo Motors High-torque metal-gear servos — the muscles of a robotic arm. MG996R, MG90S and digital servos sized for each joint. 3 picks → 
🎛️ Controllers & Servo Drivers PWM servo driver boards (PCA9685) and motion controllers that free your microcontroller pins and steady your servos. 3 picks → 
🧠 Microcontroller Boards The brains: Arduino Mega/Uno, ESP32 and compatible boards that run your robotic-arm code and read sensors. 4 picks → 
🔄 Stepper Motors NEMA 17 stepper motors for high-torque, high-repeatability robotic arms that hold position without feedback. 3 picks → 
⚡ Power & Voltage Regulators Buck converters and regulators that give your servos a clean, separate power rail — the #1 fix for jittery arms. 2 picks → 
🤏 Grippers & Claws Ready-made mechanical claws and end effectors — the business end of the arm, with or without a servo. 3 picks → 
🧵 3D Printer Filament PLA and PLA+ filament for printing rigid robotic-arm frames, brackets and gripper parts at home. 3 picks → 
🛠️ Tools & Soldering Soldering irons and stations to make permanent, reliable connections once your arm leaves the breadboard. 3 picks → 
🎚️ Sensors & Encoders Rotary encoders and position sensors that give your arm feedback — the first step toward closed-loop control. 3 picks → 
🔌 Wiring & Breadboards Jumper wires, Dupont cables and breadboards — the connective tissue for prototyping your arm’s electronics. 3 picks → 
🔩 Fasteners & Hardware M2–M4 standoffs, screws and nuts to mount boards and assemble the frame without improvising. 3 picks → Top picks
Seeed Studio SO-ARM101 6-DOF AI Robotic Arm
Low-cost open-source LeRobot arm for AI / imitation-learning projects — compatible with NVIDIA Jetson.
Best for: AI & machine-learning builds
Miuzei MG996R Metal-Gear Digital Servo (6-Pack)
Six 55g metal-gear servos — enough to drive a full 6-DOF arm in one buy.
Best for: Driving a full 6-DOF arm
HiLetgo PCA9685 16-Channel PWM Servo Driver
16 servo channels over two I²C wires, with a dedicated servo power terminal.
Best for: Any arm with 3+ servos
Arduino Mega 2560 REV3
The genuine Mega — 54 I/O pins and ample memory for a multi-joint arm and its sensors.
Best for: Multi-joint arms with sensors
STEPPERONLINE NEMA 17 Stepper Motor (2A, 59Ncm)
High-torque 48mm NEMA 17 — the standard motor for precise, repeatable arm joints.
Best for: High-torque arm joints
New to this? Start with our
build-a-robotic-arm guide — it explains how
these parts fit together before you buy.