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What is Gear Hobbing?

Malcolm Tatum
Updated May 17, 2024
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Gear hobbing is a technique that is used to create gear teeth configurations that are ideal for use in a wide range of machinery components. In cases where this takes place in a mass producing environment, it is accomplished through the use of precision machines that ensure that the cut of each tooth on each gear produced meets the specifications set by the producer.

Generally, a gear hobbing machine will make use of a series of customized bits that help to create the specific types of cutting and shaping necessary to create gears that posses exactly the right pitch and circle to work in various types of equipment. A customized bit is used for a particular size and type of gear, which helps to ensure that the cuts that are made into the blank surface of the circle of metal are relatively smooth and uniform.

Precision cutters guide the bits, with most of the more sophisticated machinery being driven by computer software rather than by the eye and hand of a human being. The exacting nature of the cuts made into the gear surface helps to ensure that the ratio of the pitch, depth, and angle of the teeth are uniform and will work perfectly when installed in the machines requiring that size and type of gear.

Custom gear hobbing is still pursued in many cultures around the world. Essentially, the creation of custom gears will involve tools and bits that are used to fashion the basic gear form, and then to slowly and meticulously form each of the teeth on the gear. Often, this also requires the artist to have access to the machine that will eventually house the gears, so the fit of teeth can be tested from time to time, ensuring an acceptable fit. Work of this type may involve materials such as hardwood. Typically, this manual process produces gears that are created for simpler types of machines that are not motor driven.

Gear hobbing is a trade that has been around for thousands of years, and has benefited humankind in a number of ways. As technology continues to advance, new methods of producing gears faster and more efficiently will likely advance the art, resulting in even more precise gear configurations.

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Malcolm Tatum
By Malcolm Tatum
Malcolm Tatum, a former teleconferencing industry professional, followed his passion for trivia, research, and writing to become a full-time freelance writer. He has contributed articles to a variety of print and online publications, including WiseGeek, and his work has also been featured in poetry collections, devotional anthologies, and newspapers. When not writing, Malcolm enjoys collecting vinyl records, following minor league baseball, and cycling.
Discussion Comments
By Renegade — On Jan 30, 2011


This makes me realize why the Luddites were averse to technologies which were driving them out of their jobs. Increasing human productivity via machine usage often involves employment cuts.

By Proxy414 — On Jan 27, 2011

Hobbing is an important and precise job which often gets overlooked. The precision and technical training required to work well with gears is the result of a long history of apprenticeship and mathematical calculations. Today, the art form is at its peak, and computers are being programmed to behave like the best hobbers.

By TrogJoe19 — On Jan 26, 2011

Today we have machines creating machines. This sounds like the matrix. Perhaps someday all of our work will be done by machines made by machines made by machines, and we will be left to higher pursuits. Too bad for the tinker and the everyday gear hobber.

Malcolm Tatum
Malcolm Tatum
Malcolm Tatum, a former teleconferencing industry professional, followed his passion for trivia, research, and writing...
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