Humanoid Robot Wrist Drive Gear m0.2 z25 | Precision Motion

Transmission Component

Engineering Context: Wrist Motion Control in Humanoid Robots

Humanoid robot wrists require a combination of flexibility, precision, and compact design. Unlike larger joint systems, wrist mechanisms operate under continuous micro-adjustments, where even small transmission errors can lead to positioning instability.

This fine pitch gear (module 0.2, 25 teeth) is specifically developed to address these challenges, providing stable motion transfer in compact robotic assemblies.

Why Fine Module Gears Are Critical

In precision robotics, smaller module gears enable smoother engagement due to increased contact ratio. Compared with larger gears, fine module designs reduce backlash and improve control resolution.

Higher positioning accuracy
Smoother rotational motion
Reduced vibration and noise

micro gears

Design Considerations

The 25-tooth configuration provides a balanced solution between compact size and stable engagement. This makes it suitable for applications where space constraints and motion precision must be optimized simultaneously.

Material and Durability

Manufactured from 20MnCr5 alloy steel, this gear undergoes carburizing heat treatment, achieving a surface hardness of approximately 60 HRC. This ensures long-term wear resistance under repeated motion cycles.

Technical Specification

Module: 0.2
Number of Teeth: 25
Pressure Angle: 20°
Material: 20MnCr5
Heat Treatment: Carburized and hardened
Surface Hardness: 58–62 HRC
Accuracy Grade: DIN 8

Typical Applications

Humanoid robot wrist modules
Micro actuator systems
Precision positioning mechanisms
Compact transmission assemblies

Manufacturing Capability

We support full customization based on engineering drawings, including module adjustment, tooth profile modification, and heat treatment optimization.

With over 50 years of experience supplying precision gears to aerospace programs, we maintain strict process control to ensure consistency and reliability.

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