In the industrial manufacturing field, many businesses need to purchase a certain number of bearing parts to support the mechanical rotating body and reduce its friction coefficient in the process of movement, and then ensure its rotary accuracy and improve its efficiency. Then, the key to the FAG imported bearing tolerance level is to determine according to the shaft to support the point of rotation accuracy.
Level 0: Generally used for bearing systems with rotational accuracy over 10 microns, the application is very common. For example, the speed control mechanism on the ordinary CNC lathe, go tool mechanism, the speed control mechanism of the car, the speed control mechanism of the big tractor, the rotation mechanism of the ordinary chemical machinery such as motor, centrifugal pump and agricultural machinery.
Level 6, 5: In the precision bearing system with rotating accuracy in 5-10 microns or high speed, such as the common bearings of CNC lathe (front support point 5, rear support point 6), finer instruments and equipment, instrument panel and its instruments, dashboard and precision rotating mechanism.
Level 4, level 2: in the super instrumentation, such as fine coordinate milling machine, fine grinding machine drive gear system software, such as instrumentation, instrument panel and high-speed camera, etc., rotational accuracy of no more than 5 microns, the speed is relatively high. China bearing the old code before the accuracy level code.
Accuracy is divided into specification accuracy and rotational accuracy. Divided into 0 degrees, 6X degrees, 6 degrees, 5 degrees, 4 degrees, 2 degrees.
P0(0),P6(6),P5(5),P4(4),P2(2) grade. Common specifications grade P0, reflected in the bearing type specification is omitted, only P6 or P6 above grade, grade code appears in the bearing type specification.
In addition, a variety of precision bearings in the processing of different separation, in the use of value is also different. For example, the use value of China bearing, the accuracy is 1.5 times of P6, 2 times of P5, 2 times of P4, 2 times of P5, 2.5 times of P5.
Deep groove ball bearings are the most widely used type of rolling bearing. Its characteristics are small friction resistance, high speed, can be used to bear radial load or radial and axial at the same time the role of the combined load on the machine, can also be used to bear axial load on the machine, such as small power motors, cars and tractors gearboxes, machine tool gearboxes, general machines, tools, etc.
Pillow block bearings are easy to mount and have a double structured seal for working in harsh environments. Commonly used seats are vertical seat (P), square seat (F), tab square seat (FS), tab round seat (FC), diamond seat (FL), ring seat (C), slider seat, etc. (T).
Grease can be added first when sealing the bearing, omitting the outer hub seal and maintenance-free, etc., and has been widely used in cars.There is also a trend of gradually expanding applications on trucks.
Spherical ball bearing mainly bear radial load, at the same time can bear a smaller axial load. The axial displacement of the shaft (housing) is limited to the play range and is self-centring, allowing normal operation with relative tilting of the inner and outer circumference.
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