How the HONPINE JRM Planetary Joint Module Improves Robot Motion Performance?

May 25, 2026

The JRM-C Planetary Joint Module is a lightweight, high-torque actuator module specially designed for humanoid robots, wheeled robots, quadruped robots, and other intelligent robotic systems.


By deeply integrating a high power-density frameless motor, planetary reducer, high-precision encoder, and integrated driver, the module achieves a more compact structure, smaller size, high torque output, and lightweight design.

planetary actuator module


How Does the HONPINE JRM Planetary Joint Module Adapt to Robots?



HONPINE’s self-developed drive algorithms ensure high compatibility between the joint module and the robot body, enabling highly coordinated operation and significantly improving motion synchronization and control performance.


At the same time, the module is designed to meet the robotics industry’s demands for high customization, rapid development cycles, flexible configuration, and fast market responsiveness.

  • Features of the JRM Planetary Joint Module

  • Full-series outer diameter coverage from 42 mm to 150 mm, with peak torque support up to 600 Nm.

  • Equipped with HONPINE’s self-developed fourth-generation high torque-density motor for powerful performance output.

  • High rigidity under heavy loads with stable long-life operation.

  • Plug-and-play quick-connect design for easier and more reliable wiring.

  • Supports CAN-FD and EtherCAT (ECAT) bus communication, with optional CANopen and CANMIT communication protocols. Supports position, speed, torque, and hybrid force-position control modes for multi-scenario applications.

  • Supports customized explosion-proof joint modules, with explosion-proof standards including ExdIBT4 and ExdIICT6.


JRM Planetary Joint Module Selection Parameters


ModelJRM-C42JRM-C55JRM-C63JRM-C85JRM-C98JRM-
C95-S
JRM-C95JRM-C104-SJRM-C104JRM-C125-SJRM-C125JRM-C150
Gear Ratio3628363240242420.420.4222222
Continuous Speed115rpm120rpm120rpm117rpm50rpm140rpm140rpm156rpm156rpm136rpm136rpm80rpm
Maximum Speed115rpm140rpm125rpm117rpm70rpm166rpm166rpm196rpm196rpm140rpm140rpm80rpm
Continuous Torque
(Based on Ambient Temp.
25℃)
3Nm(continuous operation)
4Nm(20min
min continuous operation)
5Nm(continuous operation)
7Nm(20min
min continuous operation)
14.5Nm(continuous operation )
19Nm(20min
min continuous operation)
38Nm(continuous operation)
53Nm(20min
min continuous operation)
22Nm(continuous operation)
31Nm(20min
min continuous operation)
36Nm(continuous operation)
45Nm(20min
min continuous operation)
46Nm(continuous operation)
66Nm(20min
min continuous operation)
32Nm(continuous operation)
40Nm(20min
min continuous operation)
42Nm(continuous operation)
60Nm(20min
min continuous operation)
55Nm(continuous operation
68Nm(20min
min continuous operation)
76Nm(continuous operation)
102Nm(20mi
nmin continuous operation)
112Nm(continuous operation)
160Nm(20mi
nmin continuous operation)
Intermittent Torque
(Based on Ambient Temp.
25℃)
12Nm(<
2s)
25Nm(<
2s)
58Nm(<
2s)
155Nm(<
2s)
91Nm(<
2s)
135Nm(<
2s)
200Nm(<
2s)
120Nm(<
2s)
232Nm(<
2s)
204Nm(<
2s)
376Nm(<
2s)
600Nm(<
2S)
Voltage48VDC48/72VDC72VDC
DriverBuilt-in
Communication InterfaceCAN-FDCAN-FDCAN-FDCAN-
FD/ECAT
CAN-
FD/ECAT
CAN-
FD/ECAT
CAN-
FD/ECAT
CAN-
FD/ECAT
CAN-
FD/ECAT
CAN-
FD/ECAT
CAN-
FD/ECAT
CAN-
FD/ECAT
EncoderDual Encoder
Encoder Resolution(Motor Side / Output Side)17bit/19bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit17bit/17bit
Encoder Repeatability±40”±40”±40”±40”±40”±40”±40”±40”±40”±40”±40”±40”
Dimensions (Outer Diameter × Height)42mm×48mm55mm×53mm63mm×45mm85mm×67mm98mm×63mm95mm×70mm95mm×77mm104mm×75mm104mm×83.
   5mm
125mm×75m125mm×85mm150mm×100
   mm
Hollow Shaft DiameterNoneNoneNoneNoneNone8mm8mm9.5mm9.5mm13mm13mm15mm
WeightApprox180gApprox360gApprox550gApprox1.1kgApprox1.05kgApprox1.3kgApprox1.6kgApprox1.8kgApprox2.25kgApprox2.1kgApprox2.9kgApprox4.2kg



Why Choose the HONPINE Planetary Joint Module?


HONPINE brings together top industry experts and engineers to conduct comprehensive R&D and manufacturing in communication protocols, motor design, high-precision encoders, integrated drives, and motion control modules.


Combined with artificial intelligence and high-precision flexible control technologies, HONPINE provides one-stop solutions for the development of various intelligent service robots.


HONPINE’s integrated planetary joint modules feature high torque density, precise force-control feedback, and highly integrated drive-control architecture.


Through continuous process innovation and a deeply integrated design philosophy, the company combines the motor body, planetary reducer, driver, and dual encoders into a single compact actuator solution with smaller size, lighter weight, and higher torque output.


In addition, HONPINE’s self-developed drive algorithms ensure high adaptability between the module and robotic systems, enabling coordinated operation and significantly improving motion coordination and system compatibility.


The design also addresses the robotics industry’s strong demand for customization, modular flexibility, and rapid delivery capability, allowing fast adaptation to changing market requirements.


Contact HONPINE to learn more about the JRM Planetary Joint Module and related robotic actuator solutions.

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