The Concept of Gear Crowning

In the gear manufacturing industry, one of the most common problems manufacturers come across is the noise and vibration generated by paired gears. The sound of metal on metal, coupled with inconsistencies in some production lines, corrosion and natural wear and tear make for some grating sounds. As gearboxes get smaller and smaller with advancing technology, it becomes even more difficult to maintain these gears as they naturally age and keep the quality at a level where noise and misalignment doesn’t become a problem.

From a recent article from Design World,

“Occasionally, experimentation with gear ratios can limit harmonic frequency amplification, which otherwise can cause a gearbox to amplify noise like a finely tuned stereo system. You can also study material and hardness requirements so that modifications may minimize heat treatment distortion or possibly eliminate the need for heat treatment entirely. Also, pay particular attention to gear geometry to insure maximum contact. Another approach to the gear noise problem that yields good results is crowning or barreling of the teeth. This technique involves changing the chordal thickness of the tooth along its axis. This modification eliminates end bearing by offering a contact bearing in the center of the gear.”

By using a process like gear crowning, you can decrease the amount of sound in a gear pairing as well as decrease vibration, which can lead to the longevity of the parts of your assembly. As a manufacturer, you will also increase user loyalty from a process like gear crowning when your parts outlast the competitor’s.

To learn more about the process of gear crowning or other sound and vibration dampening methods, contact Gear Motions today.