Micro Gears for Robot Hands | Low Backlash Finger Gear

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High Precision Miniature Gears for Robotic Hands, Grippers & Humanoid Robot Fingers

Product Overview

This M0.5 precision gear ring is designed for compact rotary transmission systems where large-diameter positioning, lightweight structure, smooth motion, and stable angular control are required. For humanoid robot shoulder joints, this type of gear ring can be used as a key transmission component inside a rotary actuator, joint drive module, or precision positioning mechanism.

With 360 teeth, module 0.5, and a thin-wall lightweight ring structure, this gear is especially suitable for robot shoulder applications that require stable rotation, high positioning resolution, and reduced mechanical weight.

Technical Specifications

Item	Specification
Product Name	Robot Shoulder Gear Ring
Gear Type	External Precision Gear Ring
Application	Humanoid Robot Shoulder Joint / Rotary Actuator
Module	M0.5
Number of Teeth	360
Pressure Angle	20°
Helix Angle	0°
Addendum Coefficient	1
Full Tooth Height	1.125 mm
Gear Accuracy	6-h, GB2363-90
Reference Pitch Diameter	Approx. Ø180 mm
Matching Center Distance	94.5 ± 0.018 mm
Structure	Thin-wall lightweight gear ring
Production Method	Custom manufacturing by drawing
Inspection	Gear measuring report available

Why This Gear Ring Fits Robot Shoulder Applications

A humanoid robot shoulder joint usually requires a compact transmission structure that can deliver stable output torque while maintaining smooth and accurate motion. This gear ring provides several advantages for that type of system.

1. 360 Teeth for Fine Angular Resolution

The gear ring has 360 teeth, which means each tooth corresponds to approximately 1 degree of rotation. This makes it highly suitable for rotary positioning and angular control applications.

For robot shoulder joints, this helps improve:

Motion resolution

Joint angle control

Servo response accuracy

Shoulder movement smoothness

Repeatable positioning performance

2. M0.5 Small Module for Compact Design

With module 0.5, the gear teeth are small enough to support compact transmission structures while still allowing a large effective gear diameter.

This is useful for robot shoulder actuators where designers need:

Compact gearbox layout

High reduction ratio with a small driving pinion

Smooth tooth engagement

Reduced installation space

Lightweight mechanical packaging

3. Lightweight Ring Structure

The gear features a large central opening and multiple weight-reduction pockets. This structure helps reduce unnecessary mass while maintaining the outer gear transmission function.

For humanoid robots, reduced shoulder weight is very important because it directly affects:

Arm dynamic response

Motor load

Battery efficiency

Whole-body balance

Long-cycle energy consumption

A lightweight gear ring can help improve overall robot motion efficiency.

4. Large-Diameter Rotary Output

A large-diameter gear ring can be used as part of a rotary shoulder joint transmission where a smaller pinion drives the outer gear ring. This arrangement is suitable for applications requiring:

Larger output rotation radius

Better angular stability

More stable low-speed movement

Compact high-ratio transmission