Joint modules are engineering components
A joint module is not a finished arm. The buyer still owns mechanical design, controls integration, thermal validation, safety, software, and long-term maintenance decisions.
Selection guide
Compare integrated robot joints by torque, speed, protocol, and integration risk.
A selection guide for robot builders comparing integrated actuator modules, harmonic joint modules, and programmable robot joints from China suppliers.
- Best for
- robot builders and hardware teams
- Core specs
- torque, speed, voltage, protocol
- Hidden risk
- docs, firmware, heat, supply stability
- Best for
- robot builders and hardware teams
- Core specs
- torque, speed, voltage, protocol
- Hidden risk
- docs, firmware, heat, supply stability
The right comparison is multidimensional
Datasheet torque is only one field. Compare rated and peak torque, speed, reducer type, backlash, encoder, brake, voltage, protocol, cable routing, software tools, documentation, and sample availability.
What to send
Specs that make supplier matching easier.
A useful inquiry does not need to be perfect. It should give enough context to filter unsuitable robots before suppliers spend time quoting.
- Rated torque, peak torque, speed, and duty cycle
- Voltage, protocol, controller stack, and software environment
- Outer diameter, length, hollow-shaft needs, and mounting interface
- Encoder, brake, reducer, backlash, and safety requirements
- Prototype quantity, production estimate, target unit cost, and timeline
Good-fit projects
What makes the inquiry quote-ready.
- Buyer names torque and protocol requirements
- Buyer is building a prototype arm, mobile manipulator, lab robot, or equipment module
- Buyer can test samples and handle integration internally
Before quoting
Risks to check before choosing a supplier.
- Peak torque can be misunderstood as continuous torque
- Thermal behavior depends on duty cycle and mounting
- Poor documentation can cost more than hardware savings
- Supplier continuity and firmware support matter before production
FAQ
Questions buyers ask before requesting options.
Which protocol should I request?
Start from your controller stack. EtherCAT, CANopen, CAN FD, Modbus, and vendor APIs each have integration implications; the supplier's documentation quality matters as much as the label.
Sources used
Page content is organized from public market signals, official robot application pages, and source material listed below. We paraphrase and adapt it into a buyer RFQ workflow instead of copying claims.
Next step
Turn this into a supplier-ready brief.
Send the details you already know. The sourcing desk can clarify missing payload, reach, torque, protocol, tooling, and timeline details before supplier matching.