Green Plastic Spur Gear (T12), 13.5 mm Diameter

12-Tooth Green Plastic Spur Gear (T12), 13.5 mm Diameter

This green 12-tooth plastic spur gear is designed for educational models, STEM activities, hobby mechanisms, robotics prototypes, and small motorized projects. With an approximate outside diameter of 13.5 mm and a 1.9 mm center bore, it can be incorporated into compact, light-duty mechanical assemblies using appropriately sized shafts and axles. When combined with other compatible gears, it helps demonstrate rotational motion, gear ratios, speed changes, and torque transmission.

Product Specifications

Gear Dimensions

Caution:

Dimensions are approximate. Verify shaft diameter and fit before permanent installation. The T12 gear has a smaller 1.9 mm center bore and is not directly compatible with 3 mm or 1/8" axles. Actual mounting fit depends on manufacturing tolerances. This gear is intended for educational, hobby, and light-duty mechanical applications. It is not designed for automotive, industrial, or high-load applications.

Recommended Axles and Mounting

The 1.9 mm center bore is slightly smaller than a standard 2 mm motor shaft. Depending on the plastic material and manufacturing tolerances, an interference fit may be possible, but it is not guaranteed. Do not force installation if excessive resistance occurs, as this may damage or crack the gear. Verify compatibility before assembly.

Applications and Benefits:

• Demonstrates gear ratios when combined with compatible gears having different tooth counts.
• Supports speed reduction experiments in compact mechanical assemblies.
• Helps demonstrate speed increase when used in suitable gear-driven configurations.
• Illustrates torque transmission and the relationship between rotational speed and torque.
• Demonstrates how meshed spur gears reverse rotational direction.
• Supports basic mechanical power transmission demonstrations.
• Provides a compact, reusable component for science experiments and STEM activities.
• Suitable for classroom engineering activities and mechanical demonstrations.
• Supports small DC motor projects and motorized science models.
• Useful for robotics prototypes, hobby mechanisms, custom builds, and light-duty mechanical assemblies.