Ultra-compact, impact-resistant actuation for humanoid joints.
Humanoid and dexterous-hand programs should start by separating finger-scale mechanisms from elbow, wrist, knee, and ankle actuators. Fingers often need minimum diameter and smooth short stroke, while larger joints usually need an inverted package, shock-load margin, and tight motor integration.
Classify the actuator as finger, wrist, elbow, knee, ankle, or torso before choosing standard RV or inverted RVi architecture.
Risk if missed: A product family that fits a finger package may not survive leg-impact duty cycles, and a leg-grade design may be too bulky for dexterous hands.
Provide peak impact force, continuous force, speed profile, cycle frequency, and expected fall or hard-stop events.
Risk if missed: Robotics failures often come from transient shock and heat, not from steady-state thrust rating.
Share motor rotor interface, encoder package, bearing stack, anti-rotation method, and housing constraints for integrated actuators.
Risk if missed: Late changes to the motor stack can invalidate nut OD, shaft extension, and stroke assumptions.
| Evaluation Metric | Typical Range | Buyer Relevance |
|---|---|---|
| Shock Resistance | Reviewed against buyer shock cases and hard-stop strategy | Essential for bipedal walking, handling impacts, and fall-event risk reviews. |
| Capability | Evidence | Buyer Value |
|---|---|---|
| Micro and inverted product coverage | 1.5 mm micro RV samples, ISR/RVi nut-driven designs, and custom shaft/nut machining paths. | Lets a humanoid team source finger, wrist, and joint prototypes from one engineering supplier. |
| Shock and preload review | Static load margin, preload torque window, axial play inspection, and heat-treatment record. | Supports actuator sign-off where backlash, impact survival, and joint stiffness all matter. |
| Prototype-to-small-batch handoff | DFM review, first-article inspection, and repeat-lot control plan for approved geometry. | Reduces supplier change risk between alpha robots and pilot robot builds. |
Step 1
Finger, wrist, and load-bearing joint architecture recommendations with product-family mapping.
Acceptance: Hardware team confirms each actuator class has a viable envelope and load path.
Step 2
Sample screws with preload, backlash, lead accuracy, material, and heat-treatment records.
Acceptance: Samples pass motion smoothness, heat, backlash, and short-cycle impact checks.
Step 3
Pilot-lot control plan with joint-level feedback on assembly yield and load performance.
Acceptance: Pilot robots repeat actuator performance without supplier-driven redesign.
The Micro-RV 1.5mm to 3.5mm are ideal for tendon-driven or direct linear finger actuation.
Use standard micro RV designs for very small finger or linkage packages. Use inverted RVi/ISR designs when the screw must package inside a compact motor-driven joint with high stroke-to-length ratio.
Inquiry Email
Please include screw type, diameter, lead, stroke, load, drawings, STEP files, and quantity timeline.
NDA signing supported prior to drawing uploads.
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