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
⚙️ Servos
Servo Motors
Servos are the joints of almost every hobby robotic arm. Torque is the number that matters: the shoulder lifts the whole arm and needs the most, while the wrist and gripper can use lighter micro servos. Metal-gear digital servos like the MG996R are the workhorse for 4–6 DOF desktop arms. Match the servo to the joint and your arm will be smooth and repeatable instead of weak and jittery.
As an Amazon Associate we earn from qualifying purchases. Prices and availability are accurate as shown on Amazon at the time of purchase.
Hosyond MG996R 55g High-Torque Servo (4-Pack)
Four metal-gear MG996R servos — a tidy match for a 4-DOF arm plus a spare.
Best for: 4-DOF arms
Deegoo-FPV MG996R Metal-Gear Servo (4-Pack)
Budget 4-pack MG996R servos — a low-cost way to motorise a first arm.
Best for: Budget builds & spares
Learn how to use these
Parts & hardware
Servo Motors for Robotic Arms: How to Choose (Torque, Types, Power)
A practical guide to choosing servo motors for a DIY robotic arm — how to calculate torque, SG90 vs MG996R vs serial bus servos, and how to power them without jitter or resets.
Start hereHow to Build a Robotic Arm: A Step-by-Step Guide for Beginners
Learn how to build a robotic arm from scratch — the parts, degrees of freedom, wiring and code you need, plus a clear path from your first servo to a working 6-axis arm.
The conceptsRobotic Arm Degrees of Freedom (DOF) Explained Simply
What degrees of freedom (DOF) means for a robotic arm, how many you need for different tasks, and how DOF affects cost, control and reach — explained in plain language.