News

• 22

  2020.09

  Installation and adjustment

  1. Since high-speed bearing needs to meet the requirements of high-precision bearing and high-temperature bearing, the following two points should be taken into account when considering the mounting fit and clearance of high-speed bearing: (1) Change in size and hardness from room temperature to high temperature; (2) Changes in force system and shape caused by centrifugal force at high speed. In short, the choice o...
• 21

  2020.09

  What are the factors that affect the service life of rolling bearings

  From the perspective of installation and maintenance of rolling bearings, there are many external factors that will affect the service life of the bearing, such as improper installation and improper maintenance. ZZ Bearing (Shanghai) Co., Ltd is here to share with you which of our common factors will affect the service life of bearings. 1. Analysis of installation factors For example: the installation of the gland of ...
• 17

  2020.09

  Preloaded Way and Rotate Speed of Bearings

  Preloaded Way and Rotate Speed of Bearings are important,today ZZ Bearing (Shanghai) Co., Ltd will introduce something about it: There are two ways of bearing axial preload: one is constant pressure preload, the other is positioning preload.Under constant pressure preloading, the radial stiffness of the bearing increases slightly with the increase of rotating speed, while the axial and angular stiffness decreases rapidly.U...
• 16

  2020.09

  Storage And Inspection Of ZZ Bearings

  ZZ rolling bearing is a kind of precision basic parts product. Proper storage and reasonable installation will definitely bring satisfactory results to your use. The bearing will affect and destroy the original quality of ZZ bearing due to pollution, corrosion, deformation and other factors, and it will not achieve your expected use effect. 1. Storage: ZZ bearings should not be exposed to the air. The storage...
• 15

  2020.09

  Precautions When Using ZZ Bearings

  1. Selection of shaft and bearing and tolerance of control room Press-in bearings ZZ bearings should be flexible without blocks in the direction of rotation. If the rotation is significantly inflexible, the size of the shaft is too large. As the tolerance of the shaft is obviously "sandy" afterturning it by hand, it may be too poor or the roundness of the shaft. Therefore, a good shaft and bearing control roomshould a...
• 14

  2020.09

  Heat Treatment Technology of Tapered Roller Bearing

  When the material of the tapered roller bearing is determined, the heat treatment technology is the key technology to determine the service life of the bearing. In the past ten years, the conventional heat treatment of bearings has developed rapidly, and the heat treatment of bearings with ordinary precision and general life can fully realize mass production. For a long time, the heat treatment of high-carbon chromium ...
• 11

  2020.09

  Deformation of Cylindrical Roller Bearing Cage

  Cylindrical roller bearing copper alloy solid cage has compact structure, high strength, running performance and impact resistance are better than steel combined cage, it is a structure often used for high-speed, high-temperature and other high-performance bearings. In the cage structure design, in order to install the rollers into the cage and the ferrule (inner ring or outer ring), so that the three can form an inseparable...
• 10

  2020.09

  Bearing Assembly Safety Production

  1. Safe production of bearing assembly Safety production is very important in rolling bearing assembly operation.In particular, the operator of the press must operate in accordance with the safety rules, in order to ensure personal safety and equipment in good condition.Pressure machinery in bearing assembly, especially eccentric press, has fast rotation speed, and the punch slider needs to pass through the lower dead po...
• 09

  2020.09

  Cleaning And Installation Of ZZ Bearing

  Most of the newly bought ZZ bearings are coated with grease. These greases are mainly used to prevent ZZ bearings from rusting and do not provide lubrication. For example,ZZ 23030-2CS.Therefore, they must be thoroughly cleaned before they can be installed and used. The cleaning method is: all ZZ bearings sealed with anti-rust oil can be cleaned with gasoline or kerosene. For ZZ bearings that use heavy oil and anti-...
• 08

  2020.09

  Maintenance and Maintenance of Cylindrical Roller Bearings

  In order to make the cylindrical roller bearing give full play to and maintain its due performance for a long time, the cylindrical roller bearing must be maintained regularly (regular inspection). Through appropriate regular inspections, it is very important to improve productivity and economy to detect faults early and prevent accidents before they occur. Disassemble The disassembly of the bearing is for reg...
• 07

  2020.09

  Spherical Roller Bearing Fretting Damage Form

  1. Common forms of spherical roller bearing fretting damage In fact, the fretting state of spherical roller bearings is very complicated. Generally, according to the simplified plane contact model and according to different relative motion directions, fretting can be divided into four basic motion modes: tangential motion, radial motion, Rolling fretting, twisting fretting.In practice, the latter three types of frettin...
• 04

  2020.09

  Brief History of Bearing Development

  The bearing is the support of the mechanical drive shaft and is an important guarantee for the performance, function and efficiency of the main engine. It is known as the "joint" of the machine. Its main function is to transmit force and movement and reduce friction loss. Don't think that such high-end devices are modern products. No, bearings have existed on the earth for 8,000 years. Bearings appear for...
• 03

  2020.09

  Matching and Pretightening Technology of Angular Contact Bearings

  Under normal circumstances, the group of supporting contact ball bearing contact Angle is the same,When the axial load exceeds the rated requirement, some bearings will be unloaded, which will cause the ball to slip and cause early bearing failure. In order to avoid the unloading phenomenon (i.e., to improve the unloading force), the pre-load of the bearing group can be increased or the bearings with different contact ...
• 02

  2020.09

  ZZ Bearing Inspection During Operation

  The inspection items of ZZ bearing during operation include rolling sound, vibration, temperature, lubrication state of the bearing, etc. The details are as follows: 1. The rolling sound of the bearing The sound meter is used to check the size and sound quality of the rolling sound of the bearing in operation.Even if the bearing is slightly damaged such as peeling, it will emit abnormal and irregular sounds, whi...
• 01

  2020.09

  Features Of ZZ Deep Groove Ball Bearings

  Deep groove ball bearings have a simple structure and are easier to achieve higher manufacturing accuracy than other types. Therefore, they are easy to produce in series and have lower manufacturing costs, and they are extremely common. When a larger radial clearance is selected, the axial bearing capacity increases, and the contact angle is zero when bearing pure radial force. When there is an axial force, the contact ang...
• 31

  2020.08

  Waviness and Noise of Tapered Roller Bearings

  Reducing bearing noise is an urgent problem to be solved in the bearing industry in improving bearing quality. The main factor affecting the noise of tapered roller bearings is the waviness of the bearing groove surface and the surface of the steel ball. Waviness is caused by vibration in the grinding process, so it is necessary to study the relationship between vibration and skin texture and the cause of vibration. T...
• 28

  2020.08

  Reasons for Fracture of Cylindrical Roller Bearing Ring

  Cylindrical roller bearings are mostly used in medium-sized machinery. During their use, the fracture of the cylindrical roller bearing ring is also one of the common problems. Below ZZ Bearing (Shanghai) Co., Ltd shared the reasons for the fracture of the cylindrical roller bearing ring. 1. Some macro reasons for the fracture of cylindrical roller bearing ring (1) The outer wall of the cylindrical roller b...
• 27

  2020.08

  The Main Forms of Roller Bearing Failure

  When we are using bearings,there are some problems occurs without appropriate install,using or maintain,the following are some forms of roller bearing failure: 1. Fatigue flaking The inner and outer raceway of rolling bearing and the surface of rolling body both bear the load and roll relatively. Due to the action of alternating load, cracks are formed at a certain depth under the surface (the maximum shear stress...
• 26

  2020.08

  ZZ Bearings Need To Be Carefully Inspected

  With the progress and development of society, mechanization has been widely used in production and life. As an indispensable part of machinery, ZZ bearings will be used more and more widely, because ZZ bearings are used as long as there is rotation. ZZ bearings are mainly used in machinery to support and reduce friction, so the accuracy and noise of ZZ bearings are directly related to the use and life of the ma...
• 25

  2020.08

  Three Concerns to Improve Bearing Life

  Bearings are important parts of mechanical equipment. In order to ensure the best performance of the bearings, reliable work, correct installation and operation, and reasonable maintenance are very important. Based on experience, ZZ Bearing (Shanghai) Co., Ltd shares three main concerns for extending bearing life. 1. First of all, lubrication is the key Choose a suitable lubrication system and high-quality lubrica...
• 24

  2020.08

  Industrial Heating Furnaces Only Use Spherical Roller Bearings

  The wheel equipment of industrial furnace and heating furnace. The furnace referred to here is only for steel forging. The largest number of heating furnaces and annealing furnaces is the trolley type, so there are several trolleys for each trolley. Wheel equipment composition. 1. Why use spherical roller bearings in wheel bearings (1) When the trolley is walking, the wheel speed is slow, about 6 or 7 meters ...
• 21

  2020.08

  Causes of Bearing Damage and Repair Methods

  Due to the quality and external conditions of the rolling bearing during use, its load-carrying capacity, rotation accuracy and anti-friction performance will change. When the performance index of the bearing is lower than the use requirement and cannot work normally, it is called bearing damage Or failure, once the bearing is damaged or other accidents, there will be various abnormal phenomena such as machine and equipment ...
• 20

  2020.08

  Handling Method of Bearing Overheating

  As we well know bearing is the most important supporting component of motor.In general, when the temperature of the motor rolling bearing exceeds 95℃ and the temperature of sliding bearing exceeds 80℃, the bearing is overheated.At present, most motor manufacturers can consider embedding temperature measuring element near the bearing and then protecting the bearing by controlling circuit. Bearing overheating is a comm...
• 19

  2020.08

  Identification And Use Of ZZ Bearings

  Whether the outer packaging is clear: Under normal circumstances, our brand's products have special designers to design the outer packaging, and arrange for production in factories that pass the production conditions, so the packaging is very clear and unambiguous from lines to color blocks . Whether the steel stamping is clear: Brand words, labels, etc. will be printed on the ZZ bearing body. The fonts are very...