Do you know the functions and types of bearings
The function of the bearing is to support the shaft and the rotating parts on the shaft to maintain a certain rotation accuracy
and bear the load, and at the same time, it is also used to reduce the friction and wear caused by the relative rotating parts.
According to the nature of the bearing work, it can be divided into sliding bearings and rolling bearings. Rolling bearings are commonly used supporting components in various types of machinery; most of the sliding bearings are used in high-speed, heavy-duty, large impact load or mechanical equipment with particularly high requirements on the rotation accuracy of the shaft, especially the need for split type structure.
(1) Rolling bearings:
①Single row radial ball bearing (radial bearing, deep groove ball bearing)
Features: It mainly bears the radial load and requires high rigidity of the shaft Applicable occasions: Gearbox and main shaft Model number: Example 6305
② Double row radial ball bearing (self-aligning ball bearing)
Features: Mainly bear radial load, double row of steel balls, outer ring raceway is inner spherical shape, with automatic centering performance, can automatically compensate for the coaxiality error caused by deflection and shell deformation.
Applicable occasions: In parts where the bearing seat hole cannot guarantee strict coaxiality. Model representation: Example 1207, 3303 (imported)
③ Spherical roller bearing (short radial cylindrical roller bearing)
Features: It mainly bears the radial load, can also bear axial load in one direction and has a high radial load-bearing capacity.
Applicable occasions: work under heavy load or vibration load. Model representation: Example 2000
④ Cylindrical roller bearings
Features: The inner and outer rings of the bearing can be separated, which is a separable bearing, and the inner ring can be moved freely in the axial direction. Applicable occasions: This bearing is used to bear radial loads.
Model representation: N000 example Nj202E (imported model, with ribs on the inner ring) NU206EC (without ribs on the inner ring)
⑤Radial thrust ball bearing (angular contact ball bearing)
Features: It can bear radial load and axial load at the same time, and can also bear pure axial load. The limit speed is high. The ability of this type of bearing to bear axial load is determined by the contact angle. The greater the α, the ability to bear axial load. Also bigger (α=15°α=25°α=40°)
Applicable occasions: Angular contact ball bearings can only bear axial force in one direction, so these bearings should be used in pairs, such as machine tool spindles.
⑥Single row tapered roller bearings
Features: It is mainly suitable for bearing combined radial and axial loads (mainly radial). Large taper angles can also withstand the combined radial and axial loads mainly based on axial loads. The bearing is a separate bearing. During the process, the radial clearance and axial clearance of the bearing can be adjusted, and the pre-interference installation can also be performed.
Applicable occasions: The rotation speed is not too high, the rigidity is good, and the axial and radial loads are large, such as the model on the helical gear shaft: Example 30202 (import)
⑦Needle bearing:
Divided into inner ring needle roller bearings (74000 type) and needle roller bearings without an inner ring (84000 type).
Model representation: example INA.ZARN2572-TU-ANA GERMANY02/B07→The inner hole of the shaft is φ25, and the outer circle is φ72.
According to the characteristics of the machine, choosing bearings with different functions can greatly improve the operation efficiency of the machine and reduce the probability of problems in the machine work.
Jinrui Bearing is a company with more than 20 years of bearing manufacturing experience, providing high-quality bearings and free technical guidance for customers at home and abroad.
