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
by Miuzei
★ Best for: Driving a full 6-DOF arm
Six 55g metal-gear servos — enough to drive a full 6-DOF arm in one buy.
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The MG996R is the default servo for hobby robotic arms, and a six-pack is exactly what a 6-DOF arm needs. Metal gears handle the side loads a moving arm puts on each joint far better than the plastic gears in micro servos, and ~10 kg·cm of torque is enough for the shoulder and elbow on a desktop-scale arm. Buying a matched set keeps response and centering consistent across joints, which matters a lot once you start running coordinated motion. Pair them with a PCA9685 driver and a separate 5–6V supply for clean, repeatable movement.
| Quantity | 6 servos |
|---|---|
| Weight | 55 g each |
| Gears | Metal |
| Torque | ~9–11 kg·cm (at 4.8–6V) |
| Rotation | ~180° |
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.
Parts & hardwarePick the right robotic arm power supply, size current from servo stall draw, wire a common ground, and stop brownouts that reset your Arduino or Pi.
Start hereLearn 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.
Four metal-gear MG996R servos — a tidy match for a 4-DOF arm plus a spare.
Best for: 4-DOF arms
Budget 4-pack MG996R servos — a low-cost way to motorise a first arm.
Best for: Budget builds & spares