When selecting rolling bearings，A number of factors need to be considered，To ensure that the selected bearings can meet the specific working conditions and requirements。Here are some of the main rules to follow：

one、Load factor

1. Load size and nature：

• Small load or impact hours，Ball bearings are generally selected（Such as deep groove ball bearings），Because ball bearings are suitable for bearing light、Medium and more stable load。

• When there are shocks and vibrations，Select roller bearings（Such as cylindrical roller bearings、Tapered roller bearings, etc），Because roller bearings are suitable for bearing heavy loads and large impact loads。

2. Direction of load：

• Pure radial load：Deep groove ball bearings are selected、Cylindrical roller bearings, etc。

• Pure axial load：Use thrust ball bearings、Thrust cylindrical roller bearings, etc。

• Combined radial and axial loads：Angular contact ball bearings are selected、Tapered roller bearings, etc。These bearings can withstand both radial and axial loads。

two、Speed factor

• High speed，Preferentially choose ball bearings and light series bearings，Because ball bearings usually have a high limit speed and rotation accuracy。

• At low RPM，Roller bearings and heavy series of bearings are available。But heres the caveat，The limit speed of thrust bearings is usually very low，Not suitable for high-speed applications。

three、Consider accuracy and rigidity

• When precision is required，Optional ball bearing，Because the rotation accuracy of ball bearings is usually higher。

• When rigidity requirements are high，Select roller bearings，Because roller bearings usually have higher stiffness。In addition，It can also be done by appropriately“preload”To increase bearing stiffness。

four、Consider aligning performance

• When shaft rigidity is poor、When the axial degree of the bearing seat hole is poor or there are multiple points of support，Aligning bearings should be selected（Such as aligning ball bearings、Aligning roller bearings, etc），These bearings can adapt to the angular deviation and angular motion between the two raceway axis lines。

five、Consider size limitations

• When there is a limitation on radial size，Choose light series、Extra light series or needle roller bearings。

• When the axial size is limited，Select narrow series bearings。

six、Consider economy and convenience of purchasing

• Bearings of ordinary construction are usually cheaper than bearings of special construction，Ball bearings are generally cheaper than roller bearings，Low precision bearings are cheaper than high precision bearings。

• The frequency of installation and disassembly of bearings is also a factor to be considered。If the bearing needs to be frequently assembled or disassembled, it is difficult，Optional inside、Bearing with separable outer ring（Such as tapered roller bearings、Cylindrical roller bearings, etc）。

seven、Consider other special requests

• As needed，Decide whether to use a stop groove、Seal ring、Dust cover bearing，Whether to use low noise bearing。

• Consider the working environment and material characteristics of the bearing，Like high temperature、hypothermy、Corrosion resistance、Special requirements such as resistance to sulfur。

To sum up，Load should be considered comprehensively when selecting rolling bearings、Rotational speed、precision、rigidity、Aligning performance、Size limitation、Economic and procurement convenience and other factors。By weighing these factors，Can choose the most suitable for the specific working conditions of the rolling bearing。