Honpine

Types of Robot Joint Motor/Actuator/Module

Rotary joints in a robot are called robot joint actuators.Robot joint actuators are also commonly referred to as robot joint motors or robot joint modules. This section introduces HONPINE’s range of harmonic drive robot joint actuators and planetary reducer robot joint actuators, designed for different robotic applications and performance requirements.
All HONPINE robot joint actuators are electric robot joint actuators. We focus on electric actuation solutions and do not manufacture hydraulic robot joint actuators.
If you are looking for a robot joint actuator, robot joint motor, or robot joint module, contact HONPINE for more product information, technical specifications, and robot joint actuator selection support.

Harmonic Drive Robot Rotory Actuator

This section features HONPINE’s four major series of harmonic drive robot rotary actuators: TCHL, HPJM, HAG, and HAU. The product range is designed to meet the requirements of a wide variety of applications, including **humanoid robots, collaborative robots, specialized robots, and industrial automation.

Planetary Drive Robot Rotary Actuator

This section features HONPINE’s two major series of planetary joint modules: PA and HPJM, covering the needs of most customers looking for planetary joint module solutions. The **JRM planetary joint module** is particularly well suited for **medium- and large-sized quadruped robots**, and has attracted significant attention for applications such as inspection and military robotics.

T Shape Harmonic Drive Robot Joint Module

The T-Series harmonic joint modules are specifically designed for collaborative robotic arms. Their high precision, ease of operation, and quick assembly have made them a popular choice among collaborative robot manufacturers and companies developing mobile manipulation robots.

With the rapid growth of logistics automation and smart factories in 2026, the T-Series joint modules have also been increasingly integrated with AGV platforms and mobile robot chassis in various automation applications.
 

Waterproof Harmonic Joint Actuators

Waterproof harmonic joint actuators are designed for underwater robots and specialized robotic applications that require enhanced protection against water and moisture.

For most applications, HONPINE customers still choose standard joint modules and perform their own sealing and encapsulation. This approach can help reduce costs compared with fully customized waterproof joint modules.

For outdoor robotic applications, a common solution is to use a standard joint module with a customized rear cover and sealing structure, providing additional waterproof protection at critical connection points.
 

Explosion-Proof Planetary Joint Motor

Explosion-proof planetary joint motors are designed for robotic dogs used in applications such as chemical plant inspection, military robotics, and other environments where explosion protection is required, including applications involving braking systems and potential fire or explosion hazards.

Thanks to patented explosion-proof technology and specialized integrated structural design, these joint modules currently remain a relatively high-cost solution. Since 2026, HONPINE has started scaled production of explosion-proof planetary joint modules, improving their availability for demanding robotic applications.

Frameless Torque Motors

Frameless torque motors are an important component of integrated robotic joint modules. Many customers also refer to them as robot joint motors or joint motors.

HONPINE develops and manufactures frameless torque motors and also offers them as standalone components, allowing customers to integrate the motors into their own robotic joints, rotary actuators, and other precision motion systems.