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Product Overview

Integrated robot joints are compact electromechanical modules designed to provide controlled rotary motion in robotic systems. By combining key motion components within a single joint assembly, they simplify mechanical integration for robot manufacturers and automation equipment developers.

Depending on the model configuration, an integrated robot joint may combine a frameless torque motor, a strain wave gear reducer, absolute encoder feedback, and an electromagnetic brake. These components work together to support precise joint positioning and motion control within articulated robotic arms, mobile platforms, and other automated systems.

The appropriate model depends on the required torque, operating speed, positioning accuracy, installation dimensions, and control system compatibility. OEM customers can evaluate these parameters to select a joint configuration suited to their mechanical and electrical interfaces.

Robotic Leg Motion Module
The Robotic Leg Motion Module integrates a high-power servo drive, dual absolute encoders, and a long-life power-off holding brake. With rated torque options from 10Nm to 120Nm, it is designed for
Robot Motion Joint Assembly
The Robot Motion Joint Assembly series covers outer diameters from 40mm to 170mm, with torque options from 0.5Nm to 320Nm. Supporting both 24V DC and 220V AC systems, these robotic joints are
Six Axis Robotic Arm System
The Six Axis Robotic Arm System covers lightweight collaborative models, medium-duty general-purpose models, and heavy-duty industrial models. With payload options from 0.5kg to 80kg, it is widely
Robotic Arm Actuator Joint
The Robotic Arm Actuator Joint is available in lightweight collaborative models and heavy-duty industrial versions, covering torque ranges from 1Nm to 320Nm. Supporting 24V and 220V power systems, it
Robotic Rotational Actuator
The Robotic Rotational Actuator covers a complete diameter range from 40mm to 170mm, with torque options from 0.5Nm to 320Nm. Supporting a wide voltage range of 24V–380V, it can be applied to both
Heavy Duty Robotic Joint Actuator
The Heavy Duty Robotic Joint Actuator integrates a high-power servo drive and dual absolute encoders. With rated torque options from 60–320Nm, it supports 48V DC and 220V AC power systems for heavy
High Stiffness Robotic Joint Unit
The High Stiffness Robotic Joint Unit integrates a high-rigidity harmonic reducer and high-power servo drive. The peak torque can reach 3.5 times the rated torque, providing excellent overload
Lightweight Robot Motion Unit
The Lightweight Robot Motion Unit integrates a mini servo drive, ultra-thin harmonic reducer, and high-precision encoder. The 24V low-voltage power system makes it suitable for human-machine
Compact Robotic Motion Joint
We developed the Compact Robotic Motion Joint, an ultra-thin integrated robotic joint module designed for space-constrained automation applications. By adopting a highly integrated structure, this
Ultra Power Robotic Drive Module
Based on 39 years of experience in high-power motion control motor manufacturing, we developed the Ultra Power Robotic Drive Module for heavy-duty robotic applications requiring high torque density,
Micro Robotic Motion Module
With 39 years of experience in precision motion control component manufacturing, we specialize in the development and production of compact robotic drive solutions. The Micro Robotic Motion Module is
High Output Torque Robotic Joint
As a source manufacturer with 39 years of experience in motion control technology, we independently develop and manufacture the High Output Torque Robotic Joint for heavy-load industrial robots and

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Key Features and Technical Benefits

Integrated Architecture: Combines the motor, precision reducer, dual encoder feedback, and electromagnetic brake into a single compact housing, eliminating the need to coordinate separate mechanical assemblies and external cabling harnesses.

Torque-to-Weight Ratio: Engineered to deliver high peak torque outputs while maintaining a minimal module weight, reducing the dynamic load penalty on lightweight robotic arm links.

Precision Transmission: Utilizes strain wave gear technology to achieve high torsional stiffness and a tight backlash rating, ensuring rigid position control under heavy dynamic loads.

Real-Time Bus Communication: Supports standard industrial protocols including EtherCAT and CANopen for deterministic, low-latency multi-axis synchronization.

Thermal Management: Optimized housing design with integrated winding temperature sensors (PT1000) to prevent thermal overload during continuous high-duty-cycle operations.

Manufacturing and Quality Control

Reliability in automated production depends on consistent metallurgy, precision machining, and rigorous testing protocols executed in-house.

Component Processing

Gear and structural components are manufactured from high-purity alloy steels (e.g., 20CrMnTi / 40Cr), carburized to precise case hardness levels, and ground on multi-axis CNC centers to maintain tooth profile accuracy.

Cleanroom Assembly

Reducer integration and encoder calibration are executed in a controlled cleanroom environment to eliminate particulate contamination in bearings and optical tracks.

Inspection and Functional Testing

Every unit undergoes laser interferometer testing for transmission error, dynamometer load testing for torque ripple verification, and a 72-hour burn-in test at elevated ambient temperatures before factory release.

Documentation

Applicable quality inspection items, dimensional reports, and technical compliance documentation are maintained and available for project review.

Applications

Articulated Robotic Arms: Deployed across joints J1 through J6 in 6-axis articulated arms. Model selection depends on the torque demand, speed profile, and installation envelope of each axis.

Collaborative Robots (Cobots): Suitable for collaborative robot designs where compact integration, smooth low-speed profiles, and safety integration are required. Suitability depends on system-level assessment.

Autonomous Mobile Robots (AGVs / AMRs): Functions as compact drive and steering actuators for autonomous mobile platforms requiring high radial load capacity and precise positioning.

Automated Inspection Equipment: Powers multi-axis gimbals, inspection probes, and automated test fixtures that require controlled, high-accuracy rotary motion.

Specifications and Product Selection

Model Code	Rated Torque (Nm)	Peak Torque (Nm)	Rated Speed (rpm)	Outer Diameter (mm)	Backlash (arcmin)	Communication	Weight (kg)
IJT-40A	18	45	35	75	Less than 0.5	EtherCAT / CANopen	0.65
IJT-50B	42	110	30	105	Less than 0.5	EtherCAT / CANopen	1.40
IJT-65C	85	210	25	140	Less than 0.5	EtherCAT / CANopen	2.85
IJT-80D	150	380	20	175	Less than 0.4	EtherCAT / CANopen	4.90

How to Select the Right Robot Joint

Determine the torque requirement: Calculate the required torque for the intended motion profile, distinguishing continuous operating demand from short-duration peak demand.

Check operating speed and duty cycle: Confirm that the required speed, acceleration, and thermal cycle fall within the model specified limits.

Verify mechanical compatibility: Compare the outer diameter, mounting dimensions, output interface, and available installation space.

Confirm feedback and control requirements: Check encoder specifications, communication interfaces, drive compatibility, and brake requirements.

Review operating conditions: Consider the installation environment, thermal dissipation conditions, external loads, and maintenance access.

Frequently Asked Questions

Q: How do I select an integrated robot joint for my application?

A: Start with the required torque, speed, duty cycle, installation dimensions, and positioning requirements. Then confirm the encoder type, communication interface, brake configuration, and mechanical mounting details against the relevant model datasheet.

Q: What is the difference between rated torque and peak torque?

A: Rated torque refers to the specified continuous torque under defined operating conditions, while peak torque refers to a higher allowable torque permitted under specified limits and duration. Thermal constraints and peak duration must be verified in the technical documentation.

Q: Which communication protocols are supported?

A: Standard configurations support EtherCAT and CANopen. Availability, supported operating modes, cycle-time performance, and compatibility with the intended controller must be verified for each model variant.

Q: Does the integrated robot joint retain its position after power loss?

A: This depends on the encoder configuration. Confirm whether the selected model utilizes a single-turn or multi-turn absolute encoder, whether backup power is required, and whether a homing procedure is necessary after system reboot.

Q: Can mounting interfaces or electrical connections be customized?

A: Customization requirements are evaluated against the standard product design and OEM project specifications. Buyers should provide mechanical drawings, interface dimensions, connector requirements, and expected batch quantities for feasibility assessment.

Q: What information should I provide when requesting a quotation or evaluation sample?

A: Please provide the target application, required rated and peak torque, operating speed, duty cycle, mounting envelope, encoder and communication requirements, estimated annual quantity, and any relevant integration specifications.

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