Frameless BLDC torque motors — bare stator-and-rotor kits with no housing, shaft or bearings. Compare 0.024-4 N·m rated torque, 25-114 mm diameters, KV and Ke for robot joints and exoskeletons.
Frameless Torque Motors
The RO100 KV55 Standard tops the RO range with 12 Nm peak and 4 Nm rated torque plus 838 W rated power at 48 V. Its 113 mm, 710 g frameless construction is built for demanding humanoid, quadruped and heavy-duty joint applications.
Frameless Torque Motors
CubeMars RO80 KV105 Standard frameless motor outputs 4 Nm peak and 1.3 Nm rated torque with 490 W rated power. The 93 mm, 352 g unit runs on 48 V and provides large-torque direct drive for legged robots and industrial-grade joint modules.
Frameless Torque Motors
The RO60 KV115 Standard delivers 2.4 Nm peak and 0.8 Nm rated torque with 352 W rated power at 48 V, spinning to 5520 rpm no-load. The redesigned 74 mm, 248 g frameless platform offers high adaptability for humanoid and quadruped robot joints.
Frameless Torque Motors
CubeMars RO50 KV108 Lite frameless motor produces 0.9 Nm peak and 0.3 Nm rated torque while weighing just 105 g. With 66 W rated power at 24 V, it fits compact robotic joints where fast response and low weight matter.
Frameless Torque Motors
The RO40 KV140 Lite is a 60 g frameless torque motor with 0.6 Nm peak and 0.2 Nm rated torque in a compact 46 mm format. Rated 51 W at 24 V, it brings responsive direct-drive motion to lightweight robotic joints.
Frameless Torque Motors
The RI100 KV105 is the largest RI inrunner, delivering 4.95 Nm peak and 1.76 Nm rated torque with 252 W rated power. Its 104 mm, 500 g frameless design on a 24-48 V bus serves humanoid robots, exoskeletons and high-load joint modules.
Frameless Torque Motors
CubeMars RI80 V2.0 KV75 steps up to 4.1 Nm peak and 1.45 Nm rated torque with 172 W rated power. The 85 mm, 411 g frameless inrunner accepts 24-48 V input and fits humanoid robots, exoskeletons, quadrupeds and heavy joint modules.
Frameless Torque Motors
The RI70 KV95 offers 2.68 Nm peak and 0.94 Nm rated torque with 125 W rated power in a 76 mm frameless inrunner body of 270 g. Designed for 24-48 V buses, it targets legged robots, joint modules and precision robotic arms.
Frameless Torque Motors
CubeMars RI60 KV120 frameless inrunner delivers 1.63 Nm peak and 0.57 Nm rated torque at 85 W rated power. The 60 mm rotor runs on 24-48 V and weighs only 156 g, making it a strong fit for humanoid joints, wheel drives and collaborative arms.
Frameless Torque Motors
The RI50 KV100 is a frameless inrunner torque motor built for 24-48 V systems. In a 54 mm, 181 g package it produces 1.67 Nm peak and 0.58 Nm rated torque with 66 W rated power, serving quadruped robots, exoskeletons, AGVs and robotic arm joints.
Frameless Torque Motors
CubeMars RI30 KV260 frameless torque motor packs 0.23 Nm peak and 0.076 Nm rated torque into a 38 mm, 40 g package. Rated 33 W at 24 V, it suits compact joint modules, collaborative robot arms and rehabilitation devices that need smooth, precise torque.
Frameless Torque Motors
The CubeMars RI20 KV600 is an ultra-compact frameless inner-rotor torque motor weighing just 20 g with a 25 mm diameter. It delivers 0.072 Nm peak and 0.024 Nm rated torque at up to 18 W, ideal for rehabilitation robots, joint modules and compact robotic arms.
