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Ultra-Lightweight
Designed for CompactRobotics
RI20/RI30 Frameless Torque Motors
Ultra-Lightweight
Built to Move Light
At just Φ25mm in diameter and 20g in weight,
the RI20 is an excellent choice for miniature
robotic joints and precision medical
devices where every gram and
every millimeter matter
High KV Design
for Fast Dynamics
Operating at 16V, the motor delivers 72mN·m peak torque and 9600RPM no-load speed. Low rotor inertia supports fast dynamic response in compact motion systems
16V
Voltage72mN·m
Peak Torque9600RPM
No-Load Speed
Ф11.6mm Large Through-Bore Design for Cable Routing
Within a compact 25mm form factor, the motor integrates a 11.6mm through-bore, allowing routing of power, signal, or pneumatic lines through the center of the motor to simplify mechanical design
Ample Space
Wiring Freedom
Widely Compatible
Low Tooth-Torque
Ultimate Smooth Control
With cogging torque optimized to 0.95mN·m, the motor reduces torque ripple and supports smooth, high-precision servo control performance
Frameless Architecture for Flexible Integration
The frameless design enables direct integration with precision gearboxes, custom bearings, or structural frames, maximizing system-level space utilization and design flexibility
RI20 KV600 Frameless Torque Motor Without Hall Sensor 2D Drawing (PDF) 
