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Ultra-Lightweight
Designed for CompactRobotics
RI20/RI30 Frameless Torque Motors
Ultra-Lightweight
Built to Move Light
Weighing only 40g with a profile height as low
as 14mm, the motor delivers up to
230mN·m peak torque, providing
strong power density and load
capability for compact robotic
joint applications
High Torque Stiffness
for Stable High-Load Control
With a peak torque of 230mN·m and high torque stiffness, the motor maintains stable performance under sudden external disturbances and heavy load conditions, providing strong steady-state support and precise disturbance rejection in demanding motion control applications
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
RI30 KV20 Frameless Torque Motor Without Hall Sensor 2D Drawing (PDF) 
