As Embodied AI and humanoid robotics reach a commercial tipping point, physical mechanical structures and transmission components are pushed to their extreme performance limits. Humanoid robots demand ultra-high power density, micron-level motion precision, and aggressive lightweighting, rendering standard off-the-shelf parts insufficient.
We specialize in high-precision custom CNC turning, Swiss-type machining, and turn-mill multitasking for dexterous hands, rotary actuators, linear roller screws, and lightweight structural skeletons. Through advanced machining techniques and rigorous quality management, we empower robotics developers to transform groundbreaking concepts into reliable, high-performance physical hardware.
1. Custom Non-Standard Component Capabilities by Robot Subsystem
We provide end-to-end custom machining support across four primary humanoid robotics subsystems:
| Subsystem Module | Typical Custom Components | Key Specifications & Machining Challenges |
| Dexterous Hand | Micro planetary gear shafts, tendon drive pulleys, knuckle worm gears, coreless motor rotor shafts, high-precision pins. | Ultra-miniature dimensions with tight tolerances up to ±0.002 mm. High-hardness materials (Titanium / Hardened Stainless Steel) requiring mirror surface finish (Ra ≤ 0.1 µm) and zero burrs. |
| Linear Actuator | Planetary roller screws (screw shafts, nuts, rollers, sun gear shafts), planet carrier sleeves, encoder housings. | Extremely strict multi-thread lead accuracy and cumulative pitch error. Requires post-heat-treatment high-precision grinding and turn-grind composite operations for zero backlash. |
| Rotary Actuator | Harmonic drive flexspline blanks/circular splines, frameless torque motor rotor sleeves, cross roller bearing rings, face gear discs. | Thin-walled parts prone to deformation (e.g., flexsplines), demanding advanced stress-relief and custom flexible fixtures. High GD&T requirements (concentricity/roundness ≤ 0.003 mm). |
| Structural Skeleton | Leg/arm joint clevises, spine support frames, high-strength base flanges, integrated topology-optimized structural parts. | Complex 3D freeform surfaces requiring 5-axis simultaneous machining. High focus on lightweight design (weight-reduction pockets) using aerospace-grade aluminum or titanium alloys. |
2. Common Materials & International Standard Equivalents
Material selection directly governs the weight-to-strength ratio in robotics. We offer full material traceability and PMI testing according to global standards:
| Material Group | China (GB) | USA (ASTM/AISI) | Europe (DIN/EN) | Japan (JIS) | Robotics Application |
| Ultra-High-Strength Steel |
18Ni250 (Maraging)
20CrMnTi
40CrNiMoA |
Maraging 250
AISI 8620
AISI 4340 |
1.6359
1.7147
1.6582 |
VASCOMAX 250
SNCM220
SNCM439 |
Roller screws, drive gears for speed reducers, heavy-duty pins. |
| Titanium Alloys |
TC4
TA15 |
Ti-6Al-4V (Grade 5)
Ti-6Al-2Zr-1Mo-1V |
3.7165
3.7115 |
TAB6400
― |
Dexterous finger knuckles, lightweight high-strength connectors, joint housings. |
| Aerospace Aluminum |
7075-T6/T651
6061-T6/T651 |
Alloy 7075-T6
Alloy 6061-T6 |
AlZnMgCu1.5 (3.3415)
AlMg1SiCu (3.3211) |
A7075
A6061 |
Leg and arm structural skeletons, frameless motor housings. |
| Engineering Plastics |
PEEK
PI |
PEEK 450G
Vespel SP-1 |
PEEK-KT820
PI |
PEEK
PI |
Self-lubricating bushings for hands, insulating spacers, wear pads. |
3. Machining Capabilities & Quality Assurance
-
Ultra-Precision Turning & Swiss Machining: Equipped with premium Swiss-type lathes and multi-axis turn-mill centers for dexterous hand and screw components. Single-setup complete machining achieves concentricity within 0.003 mm.
-
Deformation Control for Thin-Walled Parts: Advanced stress-relief heat treatment and custom pneumatic/hydraulic flexible fixtures guarantee zero distortion for harmonic flexsplines and thin housings.
-
Comprehensive Quality Control: Equipped with Zeiss/Hexagon CMMs, roundness measuring instruments, gear measuring centers, and optical profilometers. Full FAIR (First Article Inspection Report) and PMI material certifications provided with every batch.
-
Agile R&D Prototyping: Tailored to the rapid iteration cycles of robotics R&D teams, supporting 1-piece minimum order quantity (MOQ) and 3-day turnaround for samples, along with comprehensive DFM (Design for Manufacturability) support.
