Frameless Outrunner Torque Motor / RO100 KV55
RO100 KV55 Frameless Outrunner Torque Motor
A frameless outrunner torque motor with an optimised electromagnetic design that cuts cogging by around half, delivering smooth, powerful direct-drive motion for cobot arms, exoskeletons and medical robots.
12 Nm
Peak Torque
4 Nm
Rated Torque
2550 rpm
No-load Speed
55
KV
Product Overview
Smooth, high-density torque
The CubeMars RO100 KV55 is a frameless outrunner torque motor built for direct-drive robotic joints. It runs on 48 V and delivers about 4 Nm continuous and up to 12 Nm peak torque from a compact 710 g body, with efficiency reaching roughly 92.6 percent.
A ~50 percent reduction in cogging torque gives exceptionally smooth low-speed motion, while a large-diameter hollow bore allows through-hole wiring, direct shaft coupling or connection to a harmonic drive. Standard Hall and temperature sensors provide accurate commutation and real-time thermal protection.
Features & Benefits
Smooth, high-density torque
A frameless outrunner engineered for versatile robotic integration.
~50% Less Cogging
Silky low-speed motion and better fidelity.
Large Hollow Bore
Route cables, couple shafts or add a gearbox.
Hall + Temp Sensors
Accurate commutation and thermal protection.
High Torque
4 Nm continuous, up to 12 Nm peak.
92.6% Efficiency
High-grade magnets for stable, cool running.
Frameless
Shaft-swappable for one-motor-many-uses.
Technical Specifications
RO100 KV55 Specifications
Verified CubeMars manufacturer specifications for the RO100 KV55 Standard.
Applications
Where the RO100 works
Built for smooth, reliable direct-drive joints.
Cobot Arms
Smooth, low-cogging joint actuation.
Exoskeletons
Powerful, compact assistive joints.
Quadruped Robots
High-dynamics leg actuation.
Medical Robots
Precise, quiet motion.
Why Choose This Product
Why the RO100
Smooth
~50 percent less cogging.
Flexible
Large hollow bore, swappable shaft.
Sensored
Hall and temperature feedback.
Support
Robomatek engineering assistance included.
Ready to integrate the RO100 KV55?
Talk to our robotics specialists for availability, lead time, and integration support.