When this product fits
Choose this family when the application, envelope, and validation needs match: Humanoid Robot Joints, Aerospace Actuators, Defense Systems.
Compact RVI architecture with a long internally threaded nut, smooth output shaft, and high load density for space-constrained electric actuators.
Choose this family when the application, envelope, and validation needs match: Humanoid Robot Joints, Aerospace Actuators, Defense Systems.
Start with custom diameter window and inspection evidence before comparing quoted price or delivery time.
Send the first drawing revision, STEP file, or sample photos with target load, lead, stroke, preload, quantity, and delivery country.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Custom Diameter Window | Approx. 8-100 mm project-dependent | Defines whether the inverted layout can fit humanoid joints, compact EMA tubes, or heavier industrial axes. |
| Lead Options | 1-20 mm typical custom range | Balances thrust, speed, back-drivability, and motor torque demand. |
| Inspection Focus | Lead accuracy, backlash/preload, runout, torque | Gives buyers evidence that the long internal thread and matched roller set are stable before actuator assembly. |
| Best Fit | Short axial envelope, high thrust, integrated actuator | Keeps the buyer from choosing inverted architecture when a simpler standard planetary screw is enough. |
Inverted screws are useful when the long internally threaded nut, push tube, or motor rotor can be integrated into a shorter actuator envelope. Standard planetary screws may still be better for simpler open-axis machines.
Most custom discussions start around 1-20 mm lead, then narrow the choice by thrust, motor torque, speed, back-drivability, and positioning requirements.
Yes. We support build-to-print shaft ends, journals, threads, flats, splines, keyways, and bearing seats when they are included in the controlled drawing package.
The lubrication plan is project-specific. We review grease type, fill volume, relubrication access, sealing, operating temperature, and duty cycle before sample approval.
Send drawings to [email protected] or WhatsApp +86 18857971991 for a manufacturing review.
Inquiry Email
Include target OD, lead, stroke, load, quantity, and delivery country.
WhatsApp Engineering
+8618857971991
Best for quick RFQ clarification and drawing-review coordination.