M0.3 Precision Gear Ring for Humanoid Robot Wrist Joint Actuators

Product Overview

The Robot Wrist Gear Ring is a precision external gear ring developed for compact wrist actuator modules in humanoid robots and robotic end-effectors. Unlike shoulder or elbow joints that mainly handle large arm movement, the wrist joint requires faster response, finer orientation control, and stable multi-direction motion in a very limited space.

This M0.5 gear ring is suitable for robot wrist mechanisms where compact structure, low rotating inertia, smooth meshing, and accurate end-effector positioning are important.

Designed for Compact Wrist Actuator Modules

Robot wrists usually combine multiple motion directions, such as pitch, roll, and yaw, inside a small mechanical envelope. The gear components used in this area must support precise motion without adding unnecessary weight or friction.

This gear ring can be used in:

Robot wrist pitch modules

Robot wrist roll actuators

End-effector rotation units

Compact hand-orientation mechanisms

Precision robotic tool positioning systems

Why It Works for Robot Wrist Applications

Fast Response with Lower Rotating Mass

The lightweight ring structure helps reduce rotating inertia in the wrist module. This supports quicker direction changes and improves the dynamic response of the robot hand or tool head.

Fine Orientation Adjustment

With a high-tooth-count external gear profile, the gear ring supports smoother angular adjustment, which is valuable for wrist rotation, tool alignment, and precise hand orientation.

Compact Transmission Layout

The M0.5 small-module tooth design allows the gear ring to work with a smaller mating pinion, helping engineers build a more compact actuator package inside the wrist joint.

Stable End-Effector Positioning

For robot wrists, small motion errors can be amplified at the gripper or tool tip. Controlled tooth accuracy helps improve repeatable positioning and reduce unstable wrist movement.

Key Specifications

Item	Specification
Product Type	Robot Wrist Gear Ring
Gear Form	External Precision Gear Ring
Module	M0.5
Number of Teeth	360
Pressure Angle	20°
Accuracy Grade	6-h, GB2363-90
Cumulative Pitch Error	Fp 0.032 mm
Tooth Profile Error	ff 0.008 mm
Single Pitch Deviation	fpt 0.005 mm
Lead Error	Fβ 0.006 mm
Structure	Lightweight thin-wall gear ring
Manufacturing Mode	Custom production by drawing

Main Benefits

Helps reduce wrist actuator inertia

Supports compact multi-axis wrist design

Improves hand and tool orientation control

Suitable for smooth low-speed rotary motion

Useful for precision end-effector positioning

Customizable for different wrist actuator layouts

Custom Manufacturing Support

We can manufacture robot wrist gear rings according to customer drawings, 3D models, mating pinion data, material requirements, and inspection standards. Custom options include bore size, mounting holes, lightweight pocket design, material, heat treatment, surface finish, and accuracy grade.