Spur gears transmit power between which of the following?

Spur gears are designed specifically to transmit power between two parallel shafts. This type of gear has straight teeth aligned parallel to the axis of rotation, which allows for the efficient transfer of power and motion between shafts that are oriented parallel to one another. The teeth of the spur gears mesh in a way that ensures smooth engagement and disengagement during operation, minimizing the sliding action and optimizing the transfer of rotational energy.

In applications where two shafts need to be synchronized or to drive a load directly, spur gears serve as one of the simplest and most effective solutions. The gear ratio, which can be determined by the number of teeth on each gear, allows for control over speed and torque, making them suitable for a variety of mechanical systems.

This direct method of power transmission is not applicable to non-parallel shaft configurations or situations involving multiple shafts, which typically require different types of gears or mechanisms, such as bevel gears for changing the axis of rotation or complex gear arrangements for simultaneous operation of multiple components.