T-Blog, Your Bearing Wikipedia

The type of machinery is different, the service conditions of the bearings will be different, and the performance requirements are also different. Generally speaking, there are more than two bearings that would be used on a shaft. In order to facilitate axial positioning, most of the bearings are used as fixed-end bearings, and the rest are used as floating-end bearings. The following table lists the choice of fixed end and floating end bearing structure.

Bearing Selection Guide The types, structures, and sizes of rolling bearings are diverse. In order to make the mechanical device play the expected performance, it is very important to choose the most suitable bearing. To select a bearing, many factors need to be analyzed. The general sequence is as follows: (1) Understand the operating conditions of mechanical devices and bearings, etc. (2) Clear requirements for bearings (3) Select the type of bearing (4) Select the bearing configuration (5) Select bearing size (6) Select bearing specifications (7) Installation method of selected bearing The location of the bearing, the operating conditions, and the environmental conditions are the prerequisites for choosing a suitable bearing. For this, it is necessary to obtain the following data and information: (1) Function and structure of the mechanical device (2) Where to use the bearing (3) Bearing load (size, direction) (4) Rotation speed (5) Vibration and shock (6) Bearing temperature (ambient temperature, temperature rise) (7) Ambient atmosphere (corrosive, clean, lubricating) How to select the bearing type for your machine? When selecting a bearing type, it is important to fully understand the operating conditions of the bearing. The following table lists the main analysis items:

Have you ever noticed the types of cage guidance of your bearings?  Basically, there are 3 types: outer-ring-rib guidance, inner-ring-rib guidance, and rolling-element guidance. Unfortunately, big part of Chinese factories, including big brands, don’t put their eyes on cage guidance.  They believe various types of cage guidance are interchangeable. You may get NU2310 with MA brass cage with outer-ring-rib guidance, even though you order “NU2310M” with clear requirement of rolling-element guidance.  In some cases, it may lead to a serious claim. All these 3 types of cage guidance probably appear in various types of bearings, with performance reasons, bearing design reasons and manufacturing reasons. Attention should be paid to the different performances of different types of cage guidance.  The performance difference of these 3 types of cage guidance is mainly reflected in the speed performance under different lubrication conditions. During our research on cage guidance, we got to know something interesting as extra: 1.     Brass cage is widely used in high-speed application. 2.     There are 4 kinds of gaps between components:  radial clearance (Gr), roller gap (△), cage guidance gap (Cr), cage axial gap (Ca), respectively.  These gaps are defined as the maximum possible displacements between relative components in radial/axial…