Yellow Plastic Spur Gear (T30), 31.3 mm Diameter

30-Tooth Yellow Plastic Spur Gear (T30), 31.3 mm Diameter

This lightweight yellow plastic mechanical component features straight external teeth that mesh with compatible spur gears to transfer rotational motion between parallel shafts. The engagement of mating teeth establishes a defined rotational relationship between driving and driven gears, allowing mechanical power and motion to pass through an interconnected gear assembly.

Product Specifications

Applications and Benefits:

• Build educational gear-driven mechanical assemblies for classroom engineering activities and mechanical science experiments.
• Demonstrate gear ratios by combining compatible spur gears with different tooth counts.
• Explore speed reduction and speed increase through comparisons of driving and driven gear rotation.
• Study torque transmission and mechanical advantage in interconnected gear systems.
• Observe rotational direction reversal when two external spur gears mesh.
• Construct small DC motor-driven mechanisms using appropriately matched gears, shafts, and mounting components.
• Develop robotics prototypes and mechanical STEM projects involving rotational motion and gear transmission.
• Support classroom experiments involving mechanical systems, motion transfer, and gear train behavior.
• Create custom hobby assemblies, lightweight mechanisms, and small mechanical models.
• Use the yellow coloration to identify the gear during classroom demonstrations and multi-gear experiments.
• Mount on appropriately sized shafts or axles when actual dimensions and mounting tolerances provide a suitable fit.
• Evaluate the AXLE3MM 3 mm metal axle as a mounting option that provides nominal clearance within the center bore.
• Evaluate PWHEELSA 1/8-inch axle rods, nominally 3.175 mm in diameter, as a closer nominal bore-fitting option.
• Develop problem-solving, critical thinking, observation, scientific reasoning, and hands-on experimentation skills through mechanical assembly and testing.
• Support introductory mechanical engineering instruction from elementary and middle school through high school and undergraduate education.

Caution:

All dimensions are approximate. Verify actual gear dimensions, shaft diameters, manufacturing tolerances, mounting requirements, and compatibility with other gear components before assembly. A nominally compatible shaft diameter does not guarantee an interference fit, secure attachment, or torque transfer. Mating spur gears must have compatible tooth geometry and appropriate alignment. Suitable for educational, hobby, and light-duty mechanical applications only. Not intended for automotive, industrial, or high-load applications. Additional gears, shafts, motors, and mounting accessories are sold separately. Adult supervision is recommended for younger students and motor-driven assemblies.