Overload handling
- Typical Range
- Defined by peak duration and thermal path
- Buyer Relevance
- Leg joints see aggressive test loads and need practical overload margins.
Actuator sourcing guidance for humanoid hips, knees, ankles, and balance joints where overload, stiffness, thermal behavior, and fast replacement matter.
Reference visual for selection context. Confirm controlled drawings, CAD path, and test records for shortlisted models.
Engineering Asset Status
Current site images are reference selection visuals for catalog navigation. They should not be treated as final factory photos, CAD drawings, test records, or lot-specific inspection documents. For shortlisted models, request the controlled packet tied to model code, drawing revision, test condition, and sample lot.
Reference visuals, product-family routes, RFQ class matrices, and validation checklists for early selection.
Controlled datasheet, drawing or CAD path, torque-speed or thermal record, wiring notes, and sample or OQC evidence.
Verified factory-floor photos, teardown images, and lot-specific test reports are not presented as public evidence until real project assets exist.
| Evaluation Metric | Typical Range | Buyer Relevance |
|---|---|---|
| Overload handling | Defined by peak duration and thermal path | Leg joints see aggressive test loads and need practical overload margins. |
This map turns the solution context into concrete document requests. Use it to decide which records, interface details, and sample checks should be available before moving from shortlist to PO, sample testing, or pilot planning.
| Validation Focus | Buyer Risk | Documents to Request | Test Record | Interface Input | Go / No-Go Signal |
|---|---|---|---|---|---|
| Overload and impact load | Walking tests introduce peak events that exceed the reducer, output bearing, or thermal design assumptions. | Torque-speed envelope, peak-duration assumption, output support boundary, and overload discussion note. | Thermal-rise note, load-holding or overload check, and sample inspection record after aggressive bench testing. | Hip, knee, and ankle load case, robot mass, payload, gait phase assumptions, and expected peak duration. | The actuator class can be tested against a defined peak event instead of an undefined walking claim. |
| Brake and safe holding | The leg cannot hold safely during power-off, fall recovery, fixture testing, or transport state. | Brake option note, holding torque boundary, wiring assumption, and brake release behavior. | Brake holding check or supplier acceptance note matched to the selected actuator class. | Required holding posture, gravity load, fail-safe expectation, controller behavior, and release sequence. | The team knows whether the sample needs an integrated brake, external brake, or fixture-level safety support. |
| Thermal continuous duty | A leg actuator passes a short bench test but overheats during repeated gait cycles. | Thermal path assumption, continuous torque note, motor and driver current boundary, and cooling constraint. | Temperature-rise record under a comparable current or duty-cycle profile when available. | Duty cycle, ambient temperature, mounting material, heat-sink path, current limit, and test duration. | The sample validation plan includes a thermal stop condition before pilot-order discussion. |
These standard classes give buyer teams a practical starting point for samples, fixture planning, and engineering quotation scope before custom interfaces are frozen.
Mid-load knee and ankle rotary class
Knee-light, ankle pitch/roll, waist, shoulder-heavy
50-150 Nm class
18-45 Nm continuous
80-150 Nm peak
20-80 rpm output class
CAN FD / EtherCAT options
Dual encoder preferred
Brake recommended for leg axes
Shortlist after robot mass and duty cycle
Thermal rise, overload duration, backlash, brake behavior, and shock load.
Heavy hip actuator class
Hip pitch/roll/yaw, heavy knee, impact test rig
>150 Nm class
60-120 Nm continuous
220-450 Nm peak
10-45 rpm output class
CAN FD / EtherCAT options
Dual encoder plus torque feedback option
Brake and emergency behavior required
Engineering review before sample release
Continuous torque envelope, housing heat path, impact load, and bearing support.
| RFQ Class | Product Family | Output Window | Integration Focus | Validation Gate |
|---|---|---|---|---|
HRA-R70-KNEE Mid-load knee and ankle rotary class | Humanoid Robot Actuator Catalog Knee-light, ankle pitch/roll, waist, shoulder-heavy | 50-150 Nm class 18-45 Nm continuous 80-150 Nm peak 20-80 rpm output class | CAN FD / EtherCAT options Dual encoder preferred Brake recommended for leg axes | Shortlist after robot mass and duty cycle Thermal rise, overload duration, backlash, brake behavior, and shock load. |
HRA-R95-HIP Heavy hip actuator class | Humanoid Robot Actuator Catalog Hip pitch/roll/yaw, heavy knee, impact test rig | >150 Nm class 60-120 Nm continuous 220-450 Nm peak 10-45 rpm output class | CAN FD / EtherCAT options Dual encoder plus torque feedback option Brake and emergency behavior required | Engineering review before sample release Continuous torque envelope, housing heat path, impact load, and bearing support. |
For aggressive walking prototypes, spare samples are recommended because overload and mechanical crashes are common during early testing.
Procurement guide
Use the procurement guide when this solution context needs joint mapping, load-case evidence, sample timing, and buyer-side validation gates before supplier review.
A buyer-side guide for pre-modular humanoid actuator sourcing: selection risk, evidence requests, sample readiness, and pilot supply controls.
Next sourcing step
02 Application validation
After the application risk is mapped, move accepted load cases into sample quantity, controlled-document purpose, revision baseline, and pilot handoff planning.
Inquiry Email
Subject: Solution Inquiry - Bipedal Leg Joint Actuators
This inquiry started from an application page. Keep the request anchored to the robot scenario, validation risk, and candidate actuator path. Source context: Bipedal Leg Joint Actuators.
Instant Chat
+8618857971991
Best for quick model-fit questions before a full RFQ email.