Along with social progress and development, mechanization in production and life are widely used. Bearing as an indispensable part of the machinery, the scope of its use will become more and more widely because of the rotation to be used in the bearing.

    Mainly from the support and reduce friction bearings in machinery, so the accuracy of the bearing noise, are all directly related to the use and life of the machine. But business people are always often met with a number of customers that use the best bearings or imported bearings and its efficiency is not high, which related to the use and choice of bearings. Perhaps someone will say the bearings use and selection of that user, I just what the user what I sell ". However, as a qualified sales personnel in addition to proficient in their product knowledge but also proficient in the use of the product, of the doctor-sales, according to the performance of ancillary products, conditions of use to select the best supporting bearings. This is the current the popular specialized manufacturing and sales by major companies in the world, this way the Group operates has also achieved good results.

    A wide range of many types of bearings, the following will mainly use and selection of the most widely used deep groove ball bearings for some analysis. Bearing less understanding to deepen the understanding of the bearing.

    A bearing selection

    1, the choice of bearing models: Bearing Model by the user's technical staff in accordance with the conditions of use of complementary products and the load bearing selection. Business people to understand the user's actual load is consistent with the selected bearing, bearing up less than the requirements as soon as possible to advise clients to re-election model, but unless special products in the selection model is generally not a problem.

    2, the choice of the bearing clearance: buy bearings usually only told what type, grade, rarely interested in the bearing clearance request, the business must ask the bearing conditions of use, which bearing speed, temperature with tolerances are directly related to the choice of the bearing clearance. The general rotational speed of 3500 rev / min motor they use the CM clearance, such as high temperature speed motor requires a relatively large clearance. Bearing clearance after assembly because of the narrowing of the large and cylindrical bore up and lead to a reduction in clearance interference reduction = 60% (bearing housing with the exception of aluminum). Such as bearings before assembly clearance is 0.01mm, the amount of interference in the assembly of 0.01mm, the bearing clearance after assembly to 0.004mm. Zero clearance bearing noise and life will achieve the best state in theory, but in the actual operation taking into account the temperature rise and other problems, the bearing clearance after assembly is preferably 0.002mm-0.004mm.

    3, the grease of choice: the choice of grease bearing speed, temperature, noise requirements and starting torque requirements of business people know much about the performance of a variety of oils and fats.

    4, bearing seal type choice: bearing lubrication can be divided into oil lubrication and grease lubrication. Oil-lubricated bearings are generally used form of bearings, grease lubricated bearings generally used shields or rubber seals seal. Dust cover suitable for high or use the good parts, seals sub-contact seal and non-contact seals two the contact seal dustproof performance is good but starting torque, a non-sealed small starting torque, but the sealing performance There is no contact.

The people bearing bearing in the motor vehicle, home appliance motor bearings, motorcycle bearings, health motor bearings and other sectors of the specialized manufacturing of the bearing noise and life to achieve the best.

    Second, the bearing should be used with precautions

    1, the chamber tolerances of shaft and bearing choice and control: the bearings are pressed into flexible rotation block. If any signs of rotation is not flexible, it indicates that the shaft size is too large, and tolerance should be lowered. Such as bearings pressed into the shaft turned by hand with a sense of "imperfections", it may be too much tolerance of the shaft or shaft roundness is not good. So also in the control shaft and the bearing housing tolerances control the roundness, many domestic manufacturers only tolerance control, no control roundness.

    2, the bearing assembly: because the bearings are high-precision products, such as improper assembly of the bearing channel damage, resulting in damage to the bearings. Bearing in the assembly should have a dedicated mold and can not beat the force only a small circle, the pressure large circle only large circle force when pressed into the shaft. Assembly requires the use of pneumatic or hydraulic press-fit upper and lower mold outside state level, if inclined bearing channel cause damage due to power, leaving the bearing guide ring.

    3, the assembly foreign body to prevent: the bearing is very easy to do balancing mounted to the rotor balancing the iron filings into the inside of the bearing, therefore preferably mounted bearings do balancing. Some manufacturers in order to facilitate the assembly, the assembly in the bearing chamber coated with oil or grease from the lubricating effect, but often the operator is difficult to control, if the oil or grease in the bearing chamber accumulates more in the bearing rotation is easily along the shaft into the bearing. The bearing housing is preferably not coated with oil or grease, such as non-coated not have to control not in the bearing chamber accumulates.

    4, the paint rust prevention: the characteristics of the paint rust-prone in the sealed-type motor, the motor sounds good in the assembly, but put some time in the warehouse, motor becomes abnormal sound, remove the bearing serious rusting. Many manufacturers will be considered bearing, through our continuous publicity, motor plant has been realized insulating paint. The main problem is the formation of corrosive substances, because the insulating paint out of the volatile acidic substance in a certain temperature, humidity, corrosion of the bearing channel leading to bearing damage. The problem only is the choice of a good insulating paint, assembly and ventilation for a period of time after drying.

Bearing life is closely related to the manufacturing, assembly, use, must do a good job in every aspect, in order to make the bearings in the best operating condition, thus extending the service life of the bearing.