OpenArm Open-Source Humanoid Robot Arm

From Code to Reality — Powering Your Next-Generation Humanoid Robot

At Robotopian, we believe that building a true bipedal or dual-arm humanoid robot comes down to one thing: the precision and strength in every single joint. So when you choose to build on the OpenArm architecture, you're not just sourcing parts — you're choosing a faster, smarter, and more reliable path from concept to creation.

The core components we offer are precisely the ones you need —

DM-J8009P-2EC: High-torque joint motor (4 pcs)
DM-J4340P-2EC: Compact, high-payload joint motor (2 pcs)
DM-J4340-2EC: Compact standard joint motor (2 pcs)
DM-J4310-2EC: Low-profile joint motor (8 pcs)

— all engineered to work seamlessly in dual‑arm or multi‑axis setups.

These DAMIAO MIT-driven brushless servo motors are premiium, high-precision
robotic actuators. Each motor features an integrated driver, dualencoders for absolute
positioning, and built-in gear reduction. 

Here's what truly sets Robotopian apart:

• Unbeatable Value — We source directly through a global supply chain, cutting out middlemen to bring premium robotics hardware within reach — without compromising quality.

• Lightning‑Fast Logistics — No more endless lead times. Our intelligent warehousing ensures fast dispatch on in‑stock items, so your project stays ahead of schedule.

• More Than a Supplier — A Partner — From initial configuration advice to post‑sales technical support, our in‑house engineering team is here to help you tackle every challenge along the way.

At Robotopian, we deliver more than high‑precision actuators. We deliver the confidence that your innovation will become reality — faster, smoother, and at a fairer price.