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Precision CNC Machining of Complex Humanoid Robot Components

CRP Meccanica manufactured complex humanoid robot components using CNC machining, DMLS, and EDM, achieving ultra-tight tolerances and optimal surface finishes in aluminum alloys and titanium, ensuring precise integration.

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ROBOTICS CASE STUDY
In Short
Process

5-axis CNC Milling, Direct Metal Laser Sintering (DMLS), Wire EDM, Precision Lapping

Material

Aluminum Alloys (7075-T6, Scalmalloy®), Titanium Alloys

Application

Mechanical and structural components for advanced humanoid robotics

Challenge

Machining thin-walled aluminum and high-strength titanium components with extreme precision and tight tolerances, ensuring structural stability and precise assembly

Gallery
Humanoid robotic

ULTRA-PRECISE MACHINING FOR NEXT-GEN ROBOTICS

How CRP Meccanica Manufactures Structural Components for Humanoid Robots

As the robotics sector pushes toward human-like performance, the demand for ultra-precise, lightweight, and compact components has never been higher. In collaboration with global leaders in humanoid robotics, CRP Meccanica was selected to manufacture complex structural and mechanical parts for a new generation of humanoid platforms.

The customer needed a partner capable of producing mission-critical components with micron-level accuracy, while also supporting engineering decisions and ensuring seamless integration across mixed technologies.

The result: a comprehensive production approach combining DMLS, CNC milling, EDM, and lapping for uncompromised results.

THE TECHNICAL HEART OF THE PROJECT

1. Thin-Walled Aluminum 3D Prints (Shoulder & Upper Arm)

These parts featured wall thicknesses down to 1.5 mm, which caused vibration and potential warping during post-processing. Standard clamping methods proved insufficient.

Solution: A custom support jig was 3D printed in Windform composite to reinforce the structure during CNC machining.

RESULT

Dimensional precision within ±0.01 mm was achieved without distortion, even on ultra-thin walls.

Humanoid robotic forearm
Humanoid robotic forearm

2. Precision Actuator Interfaces (Forearm)

Hydraulic cylinders required tolerances of ±5 µm across deep bores in 7075-T6 aluminum, demanding both rigidity and surface consistency.

Solution: A combined process of precision boring, multi-axis adaptive machining, and final lapping minimized tool pressure and material deformation.

RESULT

±0.005 mm consistency across pockets and a surface finish suitable for smooth, long-life hydraulic performance.

Humanoid robotic hip and upper leg
Humanoid robotic hip and upper leg

3. High-Strength Titanium Components (Hip & Upper Leg)

Structural components in titanium alloy were prone to tool wear and work hardening. The hip torque cell required a surface finish of Ra ≤ 0.2 µm for accurate force measurements on strain gauges.

Solution: High-speed machining with custom carbide tools and precision lapping for final finishing.

RESULT

Aerospace-grade quality, increased tool life, and structural durability for dynamic load environments.

Humanoid robotic foot assembly and lower talus
Humanoid robotic foot assembly and lower talus

4. Hybrid Manufacturing Approach (Foot Assembly & Lower Talus)

The foot structure combined lightweight design with rigid precision zones—manufactured using Scalmalloy® via DMLS, followed by 5-axis CNC refinement.

Additionally, the titanium connector plate was machined using wire EDM and CNC milling, reaching tolerances of ±5 µm.

RESULT

A fully integrated hybrid assembly, maintaining total assembly precision of ±0.01 mm and ensuring drop-in compatibility with the robot’s structural architecture.

Project outcome: extreme tolerance, complete integration

CRP Meccanica delivered a full suite of high-complexity robot parts, covering:

Additive & subtractive workflows

Functional lapped bores and sliding fits

Surface finishes tailored to mechanical interfaces

Structural and dynamic integration across multiple subsystems

All manufactured under EN 9100-certified quality and delivered with full engineering support.

Tolerances
Surface finish
Wall thicknesses
Hybrid component assembly tolerance
as tight as ±5 µm
Ra ≤ 0.2 µm
down to 1.5 mm
±0.01 mm

NOT JUST A SUPPLIER. A PARTNER IN ROBOTIC PRECISION

The client sought more than machining—they needed a consulting partner, capable of:

  • Advising on fixture and tooling strategy
  • Suggesting hybrid manufacturing methods
  • Delivering results on time, without deviation

CRP Meccanica met every requirement with agility and precision, reinforcing its reputation in advanced robotics manufacturing.

Ready to Engineer the Future of Robotics?

Let’s bring precision, lightness, and strength together—micron by micron.