When bearings don’t work up to their potential

作者史蒂夫·卡茨（Steve Katz），带有波士顿的行动
艾默生轴承波士顿
Edited by Mike Santora

指定在应用程序中使用的正确轴承时，需要考虑以下关键因素：
·信封尺寸
· Axial and Radial loads to be carried
· 速度限制
·英寸或公制设计
· Lubrication criteria
·环境工作温度和更多

The majority of our sales are to original equipment manufacturers (OEM) who already know what bearings they need to specify in a new design, or to Maintenance, Repair and Operations (MRO) as to what bearing came out in a repair application. The vast majority of bearings work up to their potential ‘B-10’ life. However, there are times when things do not “roll along” smoothly, and we are consulted about a new design or about how to optimize a design that is not meeting expectations.

For example, we were contacted online by a designer who was developing a new Audio Turntable which used miniature bearings with a bore size under ½’ (.500). He felt that there were issues in the performance of the components, perhaps being impacted by the bearings. We started by reviewing the running accuracy between the tone arm and the turntable. The first step was to look at the “radial runout” in an effort to decrease the amount of endplay or wobble that would affect the tracking of the tone arm. In this case, we reduced the clearance within the bearing (P5-8 to P2-5). However, there was another issue causing problems. The bearings had initially been lubricated with grease. We switched over to a high-grade oil lube, which corrected stiffness at initial rotation and the problem was resolved.

Improving the life of the bearing

Rolling paper machine in a paper factory.

我们想要提高轴承性能的一种应用是金属碎片行业。在这种情况下，由非常大的球形滚轮轴承（14英寸轴和大型）旋转支撑的大型转子，并在汽车从大型输送机和斜道上掉下时“向上铺上”汽车。就轴承的负载和压力而言，这是一个严重的应用。这里的挑战是改善轴承的生活。我们做出了两个重大的改变。首先是使用带有不同笼子设计的滚筒轴承，将滚筒分开，这更好地处理了大型冲击载荷，并允许更好的润滑剂流动。第二个更改虽然最初昂贵，但它是从油脂转换为循环的石油系统的转换。这将单元的工作温度降低了20°Fahrenheit。
Overall, we were able to improve the life of the bearing from six months to 14 months on average.

Using high-end lubricants for improved performance

尽管所有轴承方面有一个预期寿命of hours, based on load and speed conditions, it is also important to use a grease that has an equal or better “service life”. To give you another example, in a Tissue Paper mill, we had supplied a radial bearing for the winding rolls appropriate for the load and speed conditions. Yet, the bearings were failing because the grease they were using did not have the same life potential as the bearing. After switching over to a high-end Kluber lube, bearing performance and life improved immediately.

油脂易于处理并简化密封系统，是最常使用的润滑剂，而油通常适合高速或高温操作。在上面的所有实例中，润滑的变化都是关键，应始终考虑。

艾默生轴承波士顿
www.emersonbearing.com

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