Install self-aligning roller bearing, the verticality inspection shaft and shaft centerline. Method is to dial fixed on the tank shell face, touch the top of the table top roll in rolling bearing, bearing ring, side observation indicator pointer, pointer to swing, the shaft and shaft centerline is not vertical. A box shell hole is deep, thousand meter test can also be used to lengthen the.
When mounting bearings, the verticality inspection shaft and shaft centerline. Method is to dial fixed on the tank shell face, touch the top of the table top roll in rolling bearing, spherical roller bearing shaft ring, side observation indicator pointer, pointer to swing, the shaft and shaft centerline is not vertical. A box shell hole is deep, thousand meter test can also be used to lengthen the.
1, the holder of the riveting or welding quality:
The main rivet head is offset, skew, relaxation, lack of meat or double-fold eyelid, welding position is correct, the solder joint is too large or too small, there is no welding is not strong or welding caused by excessive rolling phenomenon. Above is our check in rolling key check bearing parts, except for the inspection of the part, such as the poor quality of the other type, such as illegible, damaged, defective should think seriously, may also not be accepted.
2, from the skin and fold:
Local and base metal of the two kinds of defects of the binding is not strong, and often around the different degrees of decarbonization phenomena of poverty or carbon, the material easy to fall, dent or wear, very adverse to the spherical roller bearing life and accuracy.
3, rust, black and ma:
The latter two are easy to store water and dirt of the defects, most likely to develop into rust. The cause of corrosion is the poor installation, early wear and fatigue of the sources of pollution, serious corrosion will make the NSK bearing.
Such as scratch, scratch, bruise, bumps and so on, will cause the bearing mounting bad, causing partial load and stress concentration, decrease the rotation accuracy and service life.
5, all kinds of cracks:
Cracks such as raw materials, forging crack, heat treatment and grinding cracks, cracks, these cracks in the bearing after the operation, will become a source of stress concentration and the rapid expansion, resulting in bearing failure, has a great influence on the spherical roller bearing life and work safety. In fact, for the important use of bearings, NSK bearing factory is composed of parts of its 高 magnetic or radiographic inspection.
NSK bearing installation is correct, the seat can automatically adapt to the rolling body, ensure that the rolling body is located in the upper and lower ring raceway. If installed backwards, not only bearing does not work properly, and all mating surfaces subjected to severe wear. Because the shaft ring and ring and the difference is not very obvious, the assembly should be careful, do not make a mistake. In addition, leaving a gap of 0.2 - 0.5mm should be between the bearing seat and the bearing seat hole, installation errors caused by imprecise to compensate parts processing, when in operation, bearing ring center migration, this gap can be adjusted automatically, avoid contact with friction, which is often running. Otherwise, the NSK bearings caused by severe injury.