Need a powerful electric motor on the cheap ... motors ranging from a light switch to an Arduino. They even mention how to turn one into a big servo thanks to a project on Hackaday.io and ...

ECM's new servo ... (0.57 kg/1.26 lbs), the Eight Ball generates an impressive 18.8Nm of torque-driven by an integrated harmonic drive and powered by ECM's patented PCB Stator motor technology.

has announced the launch of its groundbreaking new servo motor featuring an integrated 50:1 gear ratio harmonic drive-engineered to deliver unmatched torque density, precision, and compactness.