What term describes gears also called Straight-Cut, where only one tooth is in ideal contact at any time?

What term describes gears also called Straight-Cut, where only one tooth is in ideal contact at any time?

• A. Bevel
• B. Helical
• C. Worm
• D. Spur

Answer: (D)

Spur gears, also known as straight-cut gears, are cut with teeth that run parallel to the gear’s axis. This straight, simple tooth geometry means that as the gears mesh, only one tooth can be in ideal contact at any moment, resulting in a direct, crisp engagement rather than a gradual one across multiple teeth. This is why spur gears are described as having a single-tooth contact at a time. They’re the go-to choice for simple, parallel-shaft power transmission and are less smooth at high speeds due to that abrupt engagement. In contrast, bevel gears change shaft direction with a conical shape, helical gears have angled teeth that mesh gradually so multiple teeth engage, and worm gears use a worm and wheel arrangement with different contact mechanics.

Spur gears, also known as straight-cut gears, are cut with teeth that run parallel to the gear’s axis. This straight, simple tooth geometry means that as the gears mesh, only one tooth can be in ideal contact at any moment, resulting in a direct, crisp engagement rather than a gradual one across multiple teeth. This is why spur gears are described as having a single-tooth contact at a time. They’re the go-to choice for simple, parallel-shaft power transmission and are less smooth at high speeds due to that abrupt engagement. In contrast, bevel gears change shaft direction with a conical shape, helical gears have angled teeth that mesh gradually so multiple teeth engage, and worm gears use a worm and wheel arrangement with different contact mechanics.