Ever wondered how power gets transferred between shafts at right angles? Bevel gears are the unsung heroes in this process. Whether in cars, planes, or industrial machinery, these gears are behind the scenes, making sure everything runs smoothly. In this article, we'll dive into the four main types of bevel gears—straight, spiral, hypoid, and zerol—and explore how each one fits into different applications. Plus, we’ll compare them to other gears like the helical gear, so you can understand which gear works best for your needs.