We are independent & ad-supported. We may earn a commission for purchases made through our links.
About Mechanics
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.
Machinery

What is a Bevel Gear?

Mary McMahon
By
Updated May 17, 2024
Our promise to you
About Mechanics is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At About Mechanics, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A bevel gear is a gear which is designed to connect with a gear mounted on an axis which may be positioned at any number of angles. Classically, bevel gears are used at 90 degree angles to each other, although other types of angles may be used as well. This is by contrast with other types of gears, which must generally be used either parallel to each other, or at right angles, in some specialized cases. Bevel gears are used in a number of applications, including the differential gear of a car.

As the term “bevel” would suggest, the face of a bevel gear is angled. Typically, a bevel gear is conical in shape, with the teeth running along the side of the cone, and the angle of the sides can be varied, depending on the application for the gear. The beveled design allows the gear to intermesh with another bevel gear at several different angles, depending on how it has been machined.

In a straight bevel gear, the teeth are straight, running vertically along the cone. The problem with straight toothed gears is that all of the impact comes down on a single tooth, making the gear rather rough, and leading to chipping along the teeth of the gear over time. For this reason, some people prefer spiral gears, in which the teeth are set at an angle, allowing the pressure to be distributed so that the gears mesh evenly and smoothly. Spiral bevel gears are readily available for a range of tasks.

Hypoid bevel gears are specialized bevel gears with axes which do not intersect. These gears utilize a large ring gear with a smaller meshing gear, and they are used in applications like car differentials, in which it may be necessary for gears to turn at different rates of speed in some situations. Hypoid gears require custom lubricants, because they are often subjected to a significant amount of strain.

One example of a bevel gear can be found in the workings of many garage doors. The gears used to turn the door are often set at right angles to each other, as can be seen upon close examination. Bevel gears are also used in other types of doors and gates, such as sluice gates for dams which are often operated by a user's manipulation of a screw which turns a bevel gear to open or close the gate.

About Mechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a About Mechanics researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

See our Editorial Process Share Feedback

Related Articles

Discussion Comments
By emtbasic — On Oct 23, 2011

@Viktor13 - Big dams use pretty much the same arrangement, except the gears are about as big as you are and are driven by a big motor.

At that size, just making and installing the gears is an impressive project. The small bevel gears you can carry around by hand or on a small cart. The big ones need trucks, cranes, and teams of people to get them hoisted into place and lined up correctly.

By Viktor13 — On Oct 23, 2011

There is a small dam in a state park near me that has a manual bevel gear setup to open and close the sluice gate. You actually have to turn a little hand wheel to make it work.

They have it padlocked to keep some passing comedian from messing with the water level, but if it weren't locked it would be nothing to crank the wheel and change the level of thousands, or even millions of gallons of water.

It's interesting to think about what engineering was able to do even 50 or 100 years ago, with no computers, calculators, Internet, or any other advanced tools. The first time I saw the sluice gate work, I was really impressed that it was all designed by hand.

By Nepal2016 — On Oct 22, 2011

When I read this, the first thing I though of was a garage door opener, because I just had to replace the bevel gear drives in mine. I never realized why they set them up that way until I had it apart.

It looks like the angled arrangement lets them make the mechanism fit in a smaller space, so that garage door openers are not some huge box that people would have trouble fitting in their garage.

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

Learn more
About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.