The role of low noise ball bearings

A low noise ball bearing can help you reduce the amount of noise created by rotating machinery. Its quiet performance is essential for applications where noise is an issue. Timken engineers have developed several methods to minimize noise from rotating machinery. They use simulations to assess performance and then present them to customers. The result is a low noise bearing that performs like a premium brand. However, noise-reduction methods cannot guarantee zero noise. To be sure, you need to test a new bearing before purchasing it.

Another factor that can improve the performance of a low noise ball bearing is its stiffness. Its stiffness is defined in terms of spring rate, which is the amount of deflection the bearing experiences under load. Its stiffness is influenced by a variety of factors, including the configuration of the bearing, its diameter, and the preload applied to it. A low noise ball bearing should meet stiffness limits specified in radial, axial, or angular modes.

The noise of a low noise ball bearing is caused by the contact between the ball and the carrier. In a linear bearing, using steel balls can reduce noise by about 4.5 dB. But when the ball diameter is increased, the noise level is reduced by nearly nine decibels. If you need a low noise ball bearing for your hemming machine, you should choose a low noise bearing that has a low noise rating.

Other factors that contribute to noise can be machining imperfections and quality of the bearing itself. Some of these imperfections can lead to radial movement, which contributes to the noise generated by the bearing. This movement, coupled with the radial motion of the ball, results in the vibrations that you hear. A low noise ball bearing can help reduce the noise generated by rotating machinery and increase its life span. However, it's important to choose the proper chassis and installation procedures when installing a low noise bearing.

There are various types of low noise ball bearings, and choosing the right type depends on the application. Some of the more common ones are shield bearings, seal bearings, and expansion compensating bearings. The spherical surface of the outer ring matches the center of the bearing and the inner ring has a two-row track groove that allows the balls to tilt freely. These low noise ball bearings are also highly resistant to contamination in lubricating oil.

In the design of a low noise ball bearing, the designer needs to balance a range of performance criteria. Some of these criteria are unfamiliar to designers of high-speed applications, so a good bearing supplier can recommend modifications to the equipment to achieve the desired low noise performance. If the application is unique and complex, the manufacturer might suggest modifying a standard bearing to meet the requirements. Ultimately, the designer must balance performance with cost.


When choosing a low-speed bearing, check its service life. The service life is usually specified in revolutions or time. Be sure to consider shipping and storage conditions, as damage to the bearing can severely reduce its lifespan. High reliability is almost always a requisite. For example, high reliability is required in some aerospace applications. In addition, high-reliability is crucial for construction equipment. There are also special considerations when selecting a low-speed bearing.