STEM Lab Gearbox Mechanical Model Kit

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UGears STEMLab kits are stylized educational models, They provide an interactive physical study guide to the mechanism, for discovering and learning its essentials and principles of working.

A mechanical gearbox is a reducer that provides speed and torque conversions from a motor to the driving wheels. After assembly, you can experiment by turns, choose I, II, III, or reverse with a kinematic pair of gears with different ratios. By rotating the actuator handle clock-wise, you can watch and control the rotation speed of the layshaft and drive shaft. In a Position “N” – idle in which both clutch gears of layshaft remain uncoupled and idling; the First Gear makes the layshaft and gears rotate with the lowest speedthe Second Gear lets the drive shaft along with the flywheel rotate with an average speed and the Third Gear allows the layshaft and all gears rotate with the highest speed. Switch on the Reverse gear and see how the driving clutch gear moves to the left towards gear “R” and connects to it transferring the rotation to the lower gear arrangement and propelling the layshaft and all gears to rotate in reverse.

When and who invented it:

The invention of the gearbox belongs to the famous German engineer Karl Benz.


A gearbox is mainly used in the automobile industry as a part of the car transmission mechanism that transfers torque from the engine's shaft to the wheels.

Assemble it and discover the principle of working of the 4-speed Manual Gearbox.

Experiment: the model comes with a Pocket Model’s Study Guide with a creation story and mechanism design as well as engaging and interesting tasks.

Immerse yourself in Augmented Reality (AR), find out how the Gearbox is used in a car, and interact with it via the dedicated Ugears AR-application.

The mechanism of the Gearbox is composed of:

  • Gear shifting lever
  • Layshaft with gear couplings
  • Reverse idle gear bearing
  • Drive shaft
  • Actuator handle

        Model Size: 5.1 x 3.9 x 4.3 in
        Number of parts: 120
        Level: Easy
        Assembly Time: 2 hours
        Recommended Age: 8+