NTN Bearing Appearance Inspection Items And Selection Considerations
NTN Bearing Appearance Inspection Items And Selection Considerations
2021年12月11日
Type Selection Requirements For Long Life INA Imported Bearings
Type Selection Requirements For Long Life INA Imported Bearings
2021年12月11日

Selection Of Types And Types Of SKF Imported Bearings

 

First, size constraints.

Generally, the space where SKF imported bearings can be installed is limited. In most cases, the shaft diameter (or SKF inlet bearing inner diameter) is limited by mechanical design or other design. Therefore, the type and size of SKF imported bearings are determined according to the inner diameter of SKF imported bearings. Therefore, the main dimension tables of standard SKF imported bearings are prepared according to the international standard inner diameter dimensions.

 

There are many sizes and forms of standard SKF imported bearings. Standard SKF imported bearings are used in the design of mechanical devices This is designed to make SKF imported bearings easy to purchase. Here’s a digression. Some SKF imported bearing catalog models do have some, but some non-standard SKF imported bearings are not available in Chinese mainland, and sometimes futures will be very long time.

 

Therefore, when SKF bearing is chosen, the time cost and the cost of later replacement should be taken into account. The load of SKF imported bearing and the load applied on SKF imported bearing vary in nature, size and direction. Generally, the rated basic load is shown in the size table. However, axial load and radial load are also important factors in selecting suitable SKF imported bearing. When the sizes of ball and needle roller bearings are the same, needle roller SKF imported bearing usually has high load capacity And bear large vibration and impact load.

Selection Of Types And Types Of SKF Imported Bearings
Second, speed.

The allowable speed is determined according to the type, size, accuracy, cage type, load, lubrication mode, cooling mode and other factors of SKF imported bearings. The table of SKF imported bearings lists the allowable speed of SKF imported bearings with standard accuracy under oil lubrication and grease lubrication. Generally, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high-speed operation.

 

Thirdly, SKF imported bearing tolerance.

The dimensional accuracy and rotation accuracy of SKF imported bearings are based on ISO and JIS standards. For machines requiring high precision and high-speed operation, it is recommended to use SKF imported bearings with precision of grade 5 or above. Deep groove ball bearings, centripetal thrust ball bearings or cylindrical roller bearings are suitable for machines with high operation precision. Rigid, when the contact surface of the rolling element and raceway of SKF imported bearing is compressed, it will produce elastic deformation. Some machines need to minimize elastic deformation. Roller bearings produce less elastic deformation than ball bearings.

 

In addition, in some cases, SKF inlet bearing shall be preloaded to increase rigidity. This procedure is usually used for inner and outer ring offset of deep groove ball bearing, centripetal thrust ball bearing and tapered roller bearing, shaft bending, tolerance change of shaft or SKF imported bearing housing, and matching error will lead to inner and outer ring eccentricity. In order to prevent excessive eccentric angle, self-aligning ball bearing, self-aligning roller bearing, or self-aligning bearing seat are better choices. Voice frequency and torque, rolling bearings are manufactured according to high-precision standards, so voice and torque are small. Deep groove ball bearings and cylindrical roller bearings are suitable for occasions with special requirements for low noise and low torque.

 

Installation and disassembly. Some applications require frequent disassembly and installation to ensure regular inspection and maintenance. SKF imported bearings with separate inner and outer rings, such as cylindrical bearings, needle roller bearings and conical bearings, are very suitable for this occasion. With the help of the shaft sleeve, the installation procedure of the taper hole self-aligning ball bearing and self-aligning roller bearing is also simplified.