Who should use this
Humanoid robot teams reviewing joint hardware stacks for limbs, torso, neck, wrist or hand axes.
Resources
Motion, Drive & Actuation
Humanoid Joint Hardware Stack Guide
Prepare actuator, motor, reducer, brake, encoder, routing, thermal, bus and structure inputs for humanoid joint sourcing reviews.
Hardware decision
The guide organizes joint sourcing and interface context without claiming complete joint design, locomotion or balance-control validation.
Prepare before RFQ
Bring joint count and DoF, actuator type, frameless motor, harmonic reducer, brake, encoder, hollow-shaft routing, cable density, feedback interface, fieldbus, thermal path, inertia, regenerative energy and structure context.
When to use this guide
Start here if the hardware question affects sourcing, files or RFQ review.
- A humanoid joint stack combines motor, reducer, brake, encoder, cabling and structure inside a constrained envelope.
- Hollow-shaft routing, feedback noise, thermal path or regenerative energy affects sourcing.
- Controlled CAD or STEP/STP files are needed for mechanical fit review.
Key engineering decisions
Joint architecture
Record joint count, DoF, actuator type, frameless torque motor, harmonic reducer, brake and encoder stack.
Feedback and network
Identify BiSS-C, SSI, incremental or absolute feedback and EtherCAT or CANopen context supplied by the customer.
Cable and EMI routing
Map hollow-shaft and high-density cable routing, EMI cross-talk isolation and separation between the motor power bus and absolute encoder feedback.
Thermal, inertia and structure
Capture thermal path, inertia matching requirement, regenerative energy, braking resistor or chopper context, link material and hand or wrist payload.
RFQ preparation checklist
Include these inputs before asking for quote or document review.
- Joint count and DoF
- Actuator type
- Frameless motor and harmonic reducer
- Brake and encoder
- BiSS-C / SSI / incremental / absolute feedback
- EtherCAT / CANopen context
- Hollow-shaft routing and EMI separation
- Thermal path, inertia, regenerative energy, structure and controlled CAD request
Engineering file considerations
Document access depends on file type and review context.
- Motor, reducer, encoder and structure drawings should be requested as a named joint stack rather than isolated files.
- Original STEP/STP, native CAD, full drawings and supplier-sensitive records require controlled access review when restricted.
- Documentation support does not deliver a complete humanoid joint design.
Related guides
Related product categories
Related custom builds
Related integration packages
Related applications
Not covered by this guide
Full humanoid joint design or thermal simulation
Balance control or locomotion validation
Safety certification or final robot performance validation
Ready to attach this guide to a real request?
Use the guide checklist to submit one RFQ with product, file and subsystem context. Controlled access may apply to STEP/STP, native CAD, full drawings and supplier-sensitive records.