Selection of bearing type

Time：2020.09.28  Source：Roller Bearings Suppliers

When selecting a bearing type, it is important to fully understand the operating conditions of the bearing. Wuxi Spark Bearing Co.,Ltd make table lists the main analysis items:

Analysis item selection method

1) Bearing installation space. Bearing type that can be accommodated in the bearing installation space. Because the rigidity and strength of the shaft are emphasized when designing the shaft system, the shaft diameter, that is, the bearing inner diameter, is generally determined first. However, rolling bearings have a variety of size series and types, and the most suitable bearing type should be selected from them.

2) Load The size, direction and nature of the load of the bearing [The load capacity of the bearing is expressed by the basic load rating, and its value is shown in the bearing size table] The bearing load is rich in changes, such as the size of the load, whether there is only radial load, axial load Is it one-way or two-way, the degree of vibration or shock, etc. After considering these factors, choose the most suitable bearing type. Generally speaking, the radial load capacity of bearings with the same inner diameter increases in the following order: deep groove ball bearings<angular contact ball bearings <cylindrical roller bearings <tapered roller bearings <self-aligning roller bearings .   WSBC 23184-MB-C2 bearing we export to our regular customer , if you insterested , pls click here :

3) The bearing type whose speed can adapt to the mechanical speed [The limit value of the bearing speed is expressed as the limit speed, and the value is shown in the bearing size table] The limit speed of the bearing is not only taken from the bearing type but also limited to the bearing size, cage type, and accuracy class , Load conditions and lubrication methods, etc. Therefore, these factors must be considered when selecting. The following bearings are mostly used for high-speed rotation: deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings . 

4) Rotation accuracy The bearing type with the required rotation accuracy [The dimensional accuracy and rotation accuracy of the bearing have been standardized by GB according to the bearing type] Machine tool spindles, gas turbines and control machines require high rotation accuracy, high speed and low friction, respectively. Bearings with accuracy above grade 5 should be used. The following bearings are generally used: deep groove ball bearings, contact ball bearings, cylindrical roller bearings

5) Rigidity The type of bearing that can meet the rigidity required by the mechanical shaft system [When the bearing is under load, the contact part between the rolling element and the raceway will be elastically deformed. "High rigidity" means that the amount of deformation of this elastic deformation is small.] In parts such as machine tool spindles and automobile final reduction gears, while increasing the rigidity of the shaft, it is necessary to increase the rigidity of the bearing. Roller bearings are less deformed under load than ball bearings. Preloading the bearing (negative clearance) can increase rigidity. This method is suitable for angular contact ball bearings and tapered roller bearings.  WSBC 23184-MB-C2 bearings are customerized for our customer , today share some photos :

 6) The relative tilt analysis of the inner ring and the outer ring causes the relative tilt of the inner ring and the outer ring of the bearing (such as the deflection of the shaft caused by the load, the poor accuracy of the shaft and the housing or the installation error), and the selection can adapt to this Type of bearing under service conditions. If the relative tilt between the inner ring and the outer ring is too large, the bearing will be damaged due to internal load. Therefore, a bearing type that can withstand this tilt should be selected. Generally speaking, the allowable tilt angle (or alignment angle) increases in the following order: cylindrical roller bearings, tapered roller bearings, deep groove ball bearings (angular contact ball bearings), spherical roller (ball) bearings

    7) Installation and disassembly Frequency and method of assembly and disassembly for regular inspections. When assembly and disassembly are frequent, it is more convenient to use cylindrical roller bearings with separable inner and outer rings, needle roller bearings and tapered roller bearings. Tapered hole self-aligning ball bearings and tapered hole spherical roller bearings can be easily assembled and disassembled through the use of fasteners or withdrawal sleeves.