Simple Machines – Gear

This wooden gear model has a sturdy construction, ideal for classroom use. This type of gear model is called arack and pinion. It is a type of linear actuator that comprises a pair of gears which convert rotational motion into linear motion. The circular gear is called the pinion, and the gear bar is called the rack. The teeth of the pinion and the rack are engaged. By turning the pinion, the rack will move backwards and forwards. This means that rotational motion is changed in linear motion. This principle can also be used the other way around. By moving the rack in linear direction, the teeth will be engaged with the circular pinion, causing it to move in rotational motion. An example of this type of gears is a rack railway, where the rack and pinion are used to move a train up a steep slope. The teeth on the rack and the gear wheel of the train make sure the train will not slip backwards when moving up the hill. The model comes with an instruction guide, which is included to make optimal use of the model and to facilitate both students and teachers with the use of it. The base measures 40 cm (W) x 6 cm (L) and the model is 15.2 cm tall.