Who this fits
For humanoid teams that need custom linear motion hardware where rotary catalog joints cannot meet stroke, force, or packaging requirements.
Custom integration support for humanoid linear actuators using roller screw, lead screw, ball screw, pushrod, or compact linkage-driven architectures where force, stroke, guide support, backlash, side load, and heat rise must be validated together.

This page should help a robotics buyer decide whether this product family belongs in the RFQ path and what evidence must be attached before a prototype or pilot order is credible.
For humanoid teams that need custom linear motion hardware where rotary catalog joints cannot meet stroke, force, or packaging requirements.
Stroke-force envelope: Finger pushrod to leg-assist dependent
Miniature screw assembly binds under side load
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Stroke-force envelope | Finger pushrod to leg-assist dependent | Linear actuator selection must balance force, speed, length, screw efficiency, and heat generation. |
| Lost motion and backlash control | Screw, nut preload, guide, and linkage dependent | Robotic fingers and precision linkages need predictable motion without excessive play. |
| Side-load and guide margin | Load path and package dependent | Miniature screw assemblies can bind or wear quickly when the actuator is asked to carry side load that should be handled by a guide or linkage. |
| Life cycle target | Stroke, lubrication, debris, and load dependent | A compact sample can look acceptable for a demo but fail in pilot robots if wear, lubrication, debris, and thermal duty are not controlled. |
Product selection is only useful when it connects to a buyer-visible evidence path. These proof gates turn the page from a capability description into an RFQ checklist.
| Proof Gate | Evidence to Ask For |
|---|---|
| Drawing baseline | CAD package, controlled drawing revision, CTQ list, open trade-offs, NRE scope, and prototype/pilot responsibility. |
| RFQ evidence package | Buyer-side package with joint map, CAD/drawing baseline, torque-speed or force-stroke targets, validation request, pilot quantity, and report expectations. |
| Evidence library | Stage-by-stage map for CMM, FAI, actuator validation, electronics/FCT, traceability, NCR, packaging, and pilot release records. |
| Test plan checklist | Operating cycle, fixture boundary, torque-speed or force-stroke method, thermal-rise setup, backlash method, FCT, endurance, and report handoff. |
| Sample PO checklist | Drawing revision, CTQ acceptance limits, report deliverables, sample variants, buyer-supplied boundaries, change rules, packaging, and delivery records. |
| Manufacturing proof | FAI, CMM, datum checks, bearing fit, flange flatness, output runout, surface treatment, and outgoing reports. |
| Actuator validation | Torque-speed, thermal rise, backlash, noise, FCT, burn-in, traceability, nonconformance, and pilot release records. |
| BOM and sourcing control | Approved parts, restricted suppliers, substitutions, lead time, firmware boundary, harness, packaging, and second-source risk. |
A serious custom actuator inquiry should show how the selected product family moves from feasibility review into repeatable pilot manufacturing.
Review CAD, joint load, envelope, thermal boundary, cable path, and custom actuator architecture risk.
Build the first sample against defined torque-speed, fit, electrical, mechanical, and inspection assumptions.
Run thermal, backlash, noise, endurance, impact, metrology, and functional checks against the application duty cycle.
Freeze drawing/BOM revisions, evidence package, outgoing inspection, packaging, spare strategy, and repeat-build controls.
This form is prefilled with Humanoid Linear Actuator Integration. Add CAD envelope, torque-speed target, duty cycle, validation needs, quantity, and schedule so the response can start with DFM questions instead of generic sample pricing.


Yes. Roller screw, ball screw, lead screw, and custom screw-nut assemblies can be reviewed depending on force, stroke, life, and manufacturability.
It can be. Finger actuators need very tight packaging and clear force-life targets, so early CAD and load-case review is important.
Inquiry Email
Include target torque/speed, quantity, and delivery location.
Application Engineer
+8618857971991
Talk directly about drawings, torque-speed targets, and RFQ data gaps.