Use and choose motor bearings
With the progress and development of society, mechanization has been widely used in the production and life. Bearings as an integral part of machinery, the scope of its use will be more and more widely, as long as there is a place to be used in the rotation bearing.
Bearing in machinery and mainly play a supportive role to reduce friction, so the bearing accuracy, noise and so directly related to the use of machinery and life. But business people are always often met with some customers that the use of the best bearings or bearings its efficiency is not high, which is related to the use and selection of the bearing. Perhaps someone will say, "bearing that is used with the user's choice, and I just what the user wants to sell me anything." But as a qualified sales personnel in addition to their own product knowledge but also proficient proficient use of the product, namely, a doctor type of sales, according to the performance of the user's ancillary products, conditions of use to select the best supporting bearing. This is currently the world's major companies specialized manufacturing and sales of popular, this approach since the implementation of one of the Group also achieved good results.
Because a wide range of many types of bearings, will mainly be used with the choice of using the widest range of deep groove ball bearings make some analysis. Want to know less bearing people can deepen their understanding of bearing
1, bearing type selection: bearing type is normally provided by the user's technical staff selected according to the bearings supporting the use of the product and bear the load condition. Business people understand the actual load mainly whether the user selected bearing consistent, if not reach the bearing requirements, should advise clients to re-election as soon as possible model, but unless special products in the choice of models is generally not a problem.
2, the bearing clearance selection: users purchase bearing usually only inform what type, grade, rarely have the bearing clearance request, the business must ask clear bearing conditions, wherein the bearing speed, temperature , with tolerances are directly related to the bearing clearance selection. General 3500 rev / min or less speed motor use CM clearance, such as high temperature and high motor requires a relatively large clearance. Bearing clearance in the assembly because of swollen and bore cylindrical narrow and lead to a reduction, reducing the amount of clearance = interference × 60% (except aluminum bearing chamber is). For example, the bearing assembly before clearance is 0.01mm, interference assembly is 0.01mm, the clearance after the bearing assembly is 0.004mm. In theory at zero clearance bearing noise and life have reached the best condition, but In actual operation, taking into account the temperature rise and other issues, the bearing clearance after assembly is 0.002mm-0.004mm better.
3, fat choices: the choice of oil is generally selected based on bearing speed, temperature, the noise requirements and starting torque, etc., requires business people to know much about the performance of various oils.
4, bearing the seal type selection: 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 for high temperature environment or use a good portion of the seal sub-contact seals and two non-contact seal, contact seal dustproof performance is good, but starting torque, non-contact seals starting torque is small, but the sealing performance No contact is good.
