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Function of deep groove ball bearing

Deep groove ball bearings, or single row radial, are the most widely used bearings in all general industries. They utilize an uninterrupted raceway that makes them optimal for radial loads. Radial ball bearings typically come with pressed steel cages, but also offer machined brass or molded nylon material. Also offers bearings with locating snap rings on the outside diameter.

Function of deep groove ball bearing
Understanding Bearing Loads
  1. Deep groove ball bearing inner and outer ring raceway for arc deep groove, groove radius slightly larger than the radius of the ball. It is mainly used to bear radial load and a certain axial load. When the radial clearance of the bearing increases, it has the function of angular contact ball bearing, which can bear larger axial load and is suitable for high speed rotation.
  2. When the shell hole and shaft relative tilt 8′ ~ 16′, the bearing can still work normally, but its service life is affected. When the speed is high and the thrust ball bearing is not applicable, this type of bearing can be used to bear pure axial load.
  3. Deep groove ball bearings are generally used by two parts of the steel plate stamping cage, but large size or high-speed bearings using solid cage. This kind of cage and stamping cage as by the ball composition. High-speed deep groove ball bearing cage is usually blocked by the inner or outer ring.
  4. Compared with other types of bearings of the same size, deep groove ball bearings have a low coefficient of friction, low vibration and noise, high limiting speed and high accuracy. It is the preferred bearing type for users. However, this type of bearing is not shock resistant and is not suitable for bearing heavy loads.

  5. Deep groove ball bearing has the advantages of simple structure and easy to use. It is a kind of bearing with large production volume and wide application range. It is widely used in many fields such as automobiles, household appliances, machine tools, motors, pumps, agricultural machinery and textile machinery. Its production accounts for more than 70% of the total production of bearings. It is a kind of bearing with high production, wide application and low price in China.

Deep groove ball bearing is a common type of rolling bearing. The basic deep groove ball bearing is composed of an outer ring, an inner ring, a group of steel balls and a group of retaining structures.  single row and double row. 

  • The type code of single row deep groove ball bearing is 6 and the code of double row deep groove ball bearing is  The utility model has the advantages of simple structure and convenient use. It is a kind of bearing with universal production and wide application.
  • Deep groove ball bearings mainly bear radial load, and can also bear radial load and axial load at the same time. When it only bears radial load, the contact angle is zero. When the large radial clearance, it has the performance of angular contact bearing and can bear large axial load. The friction coefficient is very small and the limit speed is also very high.
  • Has simple structure and is easy to achieve high manufacturing accuracy compared with other types, so it is convenient for series mass production, low manufacturing cost and widespread use. In addition to the basic type, the  also has various variant structures, such as: deep groove ball bearing with dust cover, deep groove ball bearing with rubber seal ring.
  • Deep groove ball bearings can be used in gearboxes, instruments, motors, household appliances, internal combustion engines, traffic vehicles, agricultural machinery, construction machinery, engineering machinery, yo yo, etc
  • Deep groove ball bearing mainly plays the role of supporting and reducing friction in machinery, so the accuracy and noise of deep groove ball bearing are directly related to the service life of machinery. However, business personnel often encounter some customers, that is, the efficiency of or imported deep groove ball bearings is not high, which is related to the use and selection. 
  • Some people may say that the use and selection of the business of users. I only care what users want and what I sell. However, as a qualified salesperson, in addition to being proficient in their own product knowledge, they should also be proficient in the use of products, that is, doctor type sales, and the matching deep groove ball bearings selected according to the performance and service conditions of users’ supporting products. 
  • This is the professional manufacturing and sales popular among major companies in the world. This method has also achieved good results since its implementation in renben group.
  • Because there are many types and a wide range of deep groove ball bearings, the following will mainly analyze the use and selection  a wide range of applications. It is hoped that those who know less about  can deepen their understanding of deep groove ball bearings.
  • Selection and control of tolerance of shaft and  chamber: the deep groove ball bearing shall rotate flexibly without blocking feeling after being pressed into the deep groove ball bearing. If there is obvious inflexible rotation, it indicates that the size of the shaft is too large and the tolerance should be reduced.
  •  If the deep groove ball bearing has obvious sand feeling when rotating by hand after being pressed into the shaft, it may be that the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, when controlling the tolerance of shaft and  chamber, it is also necessary to control the roundness. At present, many domestic manufacturers only control the tolerance, not the roundness.
  • Assembly method of deep groove ball bearing: because deep groove ball bearing is a high-precision product, if it is not assembled properly, it is easy to damage and cause damage to . The  shall be equipped with a special mold during assembly, and can not be knocked at will.
  •  When pressing the shaft, only the small ring can be stressed, and when pressing the large ring, only the large ring can be stressed. Pneumatic or hydraulic pressure is required during assembly. During press assembly, the upper and lower molds shall be outside the horizontal state. If there is inclination, the  will be damaged due to stress.
  • Prevention of assembly foreign matters: when the  is installed on the rotor for dynamic balance, it is easy to put the iron filings generated during dynamic balance into the deep groove ball bearing, so it is necessary to perform dynamic balance .
  •  In order to facilitate assembly, some manufacturers apply some oil or grease in the deep groove ball bearing chamber for lubrication effect during assembly, but it is often difficult for the operator to control the amount.
  •  If more oil or grease is accumulated in the deep groove ball bearing chamber, it is easy to enter the deep groove ball bearing along the shaft when the deep groove ball bearing rotates. The deep groove ball bearing chamber shall not be coated with oil or grease. If it must be coated, it shall be controlled, and there shall be no accumulation.
  • Prevention of paint rust: paint rust is often found in sealed motors. The sound of the motor is very good during assembly, but after being placed in the warehouse for some time, the abnormal sound of the motor becomes very large, and there is serious rust when. 
  • In the past, many manufacturers thought it was the problem of deep groove ball bearings. After our continuous publicity, now the motor factory has realized that it is mainly the problem of insulating paint. This problem is mainly because the acidic substances volatilized from the insulating paint form corrosive substances at a certain temperature and humidity.
  • which corrodes the channel of the deep groove ball bearing and leads to the damage of the deep groove ball bearing. At present, the problem can only be to select good insulating paint and assemble after drying and ventilation for a period of time.
  • The service life of deep groove ball bearing is closely related to manufacturing, assembly and use. It must be done well in each link in order to make the deep groove ball bearing in the running state, so as to prolong the service life of deep groove ball bearing. Generally, the installation space of double row cylindrical roller bearings is limited. In most cases, the shaft diameter (or bearing inner diameter) is limited by mechanical design or other design. 
  • Therefore, the selection of bearing type and size is determined according to the inner diameter of the bearing. Therefore, the main dimension tables of standard bearings are compiled according to the international standard inner diameter dimensions.
  • Standard double row cylindrical roller bearings have various sizes and forms, In the design of mechanical devices, standard bearings are used (considering whether the bearings are easy to purchase, as an aside, some models in the bearing catalogue do exist, but some non-standard bearings are not available in stock in Chinese Mainland. Sometimes the futures will take a long time, so the time cost and later replacement cost should be considered in the bearing selection). 
  • The load imposed on the bearings is the load of double row cylindrical roller bearings, Its nature, size and direction are changeable. In general, the rated base load is shown on the dimension table. However, axial load and radial load are also important factors in selecting suitable bearings. When the ball and needle roller bearings have the same size, double row cylindrical roller bearings usually have high load capacity and bear large vibration and impact loads.

Selection of deep groove ball bearing

  •  Selection of clearance of deep groove ball bearing: when purchasing deep groove ball bearing, users generally only tell what model and grade, and rarely put forward requirements for the clearance of ball bearing. Business personnel must ask about the service conditions of deep groove ball bearing, in which the speed, temperature and fit tolerance of ball bearing are directly related to the selection of clearance.
  •  For example, motors with relatively large clearance at high speed below 3500 cm are generally used. After assembly, the clearance of ball bearing will be reduced due to the increase of inner hole and the reduction of outer circle. The reduction of clearance = interference × 60% (except that the ball bearing chamber is made of aluminum). 
  • For example, if the clearance of ball bearing before assembly is 0.01mm and the interference during assembly is 0.01mm, the clearance of deep groove ball bearing after assembly is 0.004mm. Theoretically, the noise and service life of ball bearing reach the state of zero clearance, but considering the problems of temperature rise in actual operation, the clearance  after assembly is 0.002mm-0.004mm.
  • Selection of grease: the selection of grease is generally based on the speed, temperature resistance, noise requirements and starting torque. Business personnel are required to know the performance of various greases.
  • Selection of sealing type of ball bearing: the lubrication of ball bearing can be divided into oil lubrication and grease lubrication. Oil lubricated ball bearings are generally in the form of ball bearings, and grease lubricated generally sealed with dust covers or rubber seals. 
  • The dust cover is suitable for parts with high temperature or good service environment. The seals are divided into contact seal and non-contact seal. The contact seal has good dust-proof performance but large starting torque, and the non-contact seal has small starting torque, but the sealing performance is not as good as the contact seal.
  • At present, humanistic ball bearings have been professionally manufactured in automobile motor ball bearings, household appliance motor ball bearings, motorcycle ball bearings, health care motor and other industries, so that the noise and service life of deep groove ball bearings can reach the state.
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