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Joint Actuators

A subcategory covering integrated joint drives used in the joints of humanoid and legged robots.

A subcategory covering joint actuators — integrated drive units combining a motor, gearbox, encoder, and control electronics in a single module, used in the joints of robot limbs and torsos.

CategoryActuators
Market classResearch
11 components
AK10-9
Actuators

AK10-9

T-Motor AK series quasi-direct drive actuator, 9:1 gear ratio, 38 Nm peak torque, CAN interface.

AK60-6
Actuators

AK60-6

T-Motor AK series quasi-direct drive actuator, 6:1 gear ratio, 15 Nm peak torque, CAN interface.

Deployed
Actuators

ANYbotics ANYdrive

Integrated series-elastic joint module (SEA) — motor, harmonic reducer, torsion spring and torque sensor in a single housing, used across ANYmal robots.

TorquePeak in the tens of N·m at the output shaft (joint-dependent)
PrecisionTorque measurement via series-spring deflection
DYNAMIXEL MX-106R
Actuators

DYNAMIXEL MX-106R

ROBOTIS smart servo with 4096 PPR magnetic encoder, 8.4 Nm stall torque, RS-485/TTL interface.

Dynamixel XH540-W270 — Robotis X-Series smart servo actuator
Actuators

Dynamixel XH540-W270

Smart servo by Robotis Dynamixel with coreless BLDC motor, 4096 cpr encoder, TTL/RS-485 protocol. Torque 10.6 Nm.

Deployed
Actuators·Foundation Future Industries

Foundation Cycloid Actuator

Foundation's proprietary electric cycloidal actuator. Peak torque 160 Nm, back-driving <1 Nm, response <10 ms, 48 V / 72 V.

RMD-X8 (X8-25)
Actuators

RMD-X8 (X8-25)

MyActuator compact planetary actuator with 9:1 gear ratio, 25 Nm peak torque, CAN/RS-485 interface.

DeployedT-Motor AK80-9 — integrated actuator module with 9:1 gearbox
Actuators

T-Motor AK80-9

Integrated actuator module by T-Motor/CubeMars: BLDC motor, 9:1 planetary gearbox, FOC driver and encoder in one housing. CAN interface.

DeployedUnitree M107 Joint Motor
Actuators·Unitree Robotics

Unitree M107 Joint Motor

Unitree-developed integrated PMSM-class joint motor used in the H1 and H1-2 humanoids as a core drivetrain component.

WeightBrak jednej publicznej uniwersalnej specyfikacji masy dla samego M107.
TorquePublicly confirmed for the H1 / H1-2 platform: knee ~360 N·m, hip ~220 N·m, shoulder ~75 N·m; on H1-2, shoulder ~120 N·m, elbow ~120 N·m, wrist ~30 N·m.
DOF1 DOF na jednostkę stawową
DeployedUnitree PMSM
Actuators

Unitree PMSM

Unitree integrated joint actuator based on a low-inertia, inner-rotor PMSM, used in Unitree humanoid and legged robots.

WeightBrak jednej publicznej uniwersalnej specyfikacji masy; masa zależna od wariantu napędu i stawu.
TorquePublicly confirmed range, implementation-dependent: approximately 90 N·m (G1 largest joint / knee), 120 N·m (selected arm joints), up to approximately 360 N·m (selected leg joints in H1/H1-2/H2).
DOF1 DOF na pojedynczą jednostkę napędową; stosowany w układach wielostawowych.
Deployed
Actuators·Xiaomi

Xiaomi CyberGear Micro-Actuator

Xiaomi BLDC quasi-direct-drive micro-actuator — drives the 12 leg joints of the CyberDog 2 quadruped robot.

TorquePeak in the tens of N·m at the output shaft (variant-dependent); about 50% higher performance vs CyberGear Gen 1
PrecisionAbsolute encoder
Last updated: 23 March 2026