Unique-Bargains 123A Wire Cap Connectors 10pcs 12T .5M 7mm OD 5mm TH 2mm ID

Plastic Crown Gears for DIY Projects

This pack contains ten model 123A plastic crown gears with twelve teeth each. They are designed for science DIY projects such as RC model cars, electric robots and windmills. The gears also serve well for educational demonstrations of gear ratios and other small motor hobby tasks. Each gear is brand new and ready for immediate use.

Hobbyists and Educators Building Small Mechanisms

The gears suit builders who need a small quantity of lightweight plastic gears for low-torque experimental models. They are not intended for high-load drivetrains, continuous industrial duty or applications requiring metal gears. Buyers who need larger diameters, different tooth counts or higher strength materials should look at other gear ranges.

Ten Gears Provide Spares for Iterative Builds

With a 0.5 modulus, 7 mm outer diameter, 5 mm thickness and 2 mm bore, each gear fits small motor shafts common in hobby robotics. The ten-piece pack gives enough parts for multiple prototypes or replacements during testing. Headroom is limited to light-duty motion transfer; the plastic construction will strip under sustained heavy torque.