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Why we choose ceramic ball bearings?
In the development and application of modern industry, the bearing are mainly divided into four types according to bearing materials: ordinary bearing steel AISI52100 (GCr15), stainless steel AISI440 (9Cr18), silicon nitride (Si3N4) and zirconia (ZrO2). Among them, ceramic bearings, especially hybrid ceramic ball bearings, are widely used in h... In the development and application of modern industry, the bearing are mainly divided into four types according to bearing materials: ordinary bearing steel AISI52100 (GCr15), stainless steel AISI440 (9Cr18), silicon nitride (Si3N4) and zirconia (ZrO2). Among them, ceramic bearings, especially hybrid ceramic ball bearings, are widely used in high-speed and ultra-high-speed precision spindles. Hybrid ceramic ball bearings, that is, the rolling elements use hot-pressed Si3N4 ceramic balls, and the bearing rings are still steel rings. This type of bearing has a high degree of standardization and easy maintenance. The assembled high-speed electric spindle with hybrid ceramic ball bearing has the advantages of high speed, high rigidity, high power and long life.The composition of ceramic ball bearing: inner/outer ring with bearing steel or stainless steel + ceramic ball + PA66 stainless steel retainer + high temperature grease.When the rolling element adopts ceramic material, the bearing is defined as hybrid ceramic ball bearing. Commonly used ceramic ball materials are zirconia (ZRO2) and silicon nitride (SI3N4); commonly used ring materials are bearing steel (GCR15) and stainless iron (440, 440C) and stainless steel (304, 316, 316L).The advantages of ceramic ball bearings1. Work in more than 220 degreesThe thermal expansion coefficient of ceramic balls is small, and the bearing ball will not expand under the high temperature environment, which greatly increases the operating temperature of the entire bearing.The temperature of ordinary bearings is about 160 degrees, and the ceramic ball can reach more than 220 degrees.Ceramic balls have oil-free self-lubricating properties, and the friction coefficient of ceramic balls is small, so ceramic ball bearings have high speed.2. Long service lifeCeramic balls can be operated without any grease, that is to say, even if the grease is dried, the bearing can still work. According to our tests and feedback from some customers, the service life of ceramic ball bearing is 2-3 times that of ordinary bearings.Bearings with ceramic balls can insulate the inner ring and outer rings of the bearing, which allows the bearing to be used in a conductive environment.3. PreservativeSince ceramics are scarcely resistant to corrosion, ceramic ball bearings are suitable for operation in harsh conditions covered with corrosive media.4. Low densitySince the density of ceramic balls is lower than that of steel, and the weight is much lighter, the centrifugal effect to the outer ring during rotation can be reduced by 40%, and the service life is greatly extended.5. Good flexibilitySince the elastic modulus of ceramic is higher than that of steel, it is not easy to deform when subjected to force, so it is conducive to improve the working speed and achieve higher accuracy.The types of ZYS hybrid bearings can be divided into H719C(AC)/HQ1, H70C(AC)/HQ1, B70C/HQ1, B70C(AC)-2RZ/HQ 1, B719C(AC)-2RZ/HQ1, etc.  View Details
Do you know how the steel balls fit in the rolling bearings?
Bearings are an important part of mechanical equipment, which can not operate without bearings. However, many people do not have a deep understanding of the production process of bearings. For example, do you know how the steel balls fit in the rolling bearings? The principle is very simple.Rolling bearings are generally composed of beari... Bearings are an important part of mechanical equipment, which can not operate without bearings. However, many people do not have a deep understanding of the production process of bearings. For example, do you know how the steel balls fit in the rolling bearings? The principle is very simple.Rolling bearings are generally composed of bearing rings (inner rings and outer rings), bearing balls, bearing seals and bearing cages.In the bearing industry, the process of placing steel balls between the inner rings and outer rings is called assembly or fitting. The process is as follows:A. Prepare the inner and outer rings.B. Put in the steel balls.C. Use a ball divider to separate the steel balls.D. Place the cage and rive the two pieces of cages.In actual production, there are also full complement bearings. They are generally provided with ball-filling gaps which steel balls can be filled from that gap. However, full complement bearings have low ability to withstand axial load.Processing of steel balls:Cold stamping of bar or wire (some bars need to be punched and annealed after cold stamping)-frustration, rough grinding, soft grinding-heat treatment-hard grinding-fine grinding-fine grinding-final inspection-rust prevention-packaging-storage. View Details
Cause of bearing cage failure
                                       The cage/retainer in the rolling bearing plays the role of equidistance separating the rolling elements and preventing the rolling elements from falling, guiding and driving the rolling elements to rotate. Alth...                                        The cage/retainer in the rolling bearing plays the role of equidistance separating the rolling elements and preventing the rolling elements from falling, guiding and driving the rolling elements to rotate. Although the bearing is composed of many bearing parts, the first damaged/failed part of the bearing is often the bearing cage. The cage can be said to be the bearing "blood vessel", because it can evenly distribute the inner ring, the outer ring and the rolling element. The failure or damage of bearing cage will easily shorten the life of the bearing or even damage it. What causes the bearing cage to break? Cause of bearing cage failure ◐◑ Insufficient bearing lubrication Lubricating oil or grease is dry without adding in time / daily maintenance, or use the wrong label of the oil or grease. ◐◑ Bearing impact load The intense vibrations in the impact load create an impact of the rolling elements on the cage. ◐◑ Bearing cleanliness The bearing is not well sealed in the bearing box, and then dust may enter; the friction between the rolling element and the cage may be added, thus causing damage to the cage. ◐◑ Installation problem The bearings are not installed correctly and damage the cage during installation. ◐◑ Bearing creep Creep mostly refers to the sliding phenomenon of the ring. Under the condition of insufficient interference of the matching surface, the load point moves in the surrounding direction due to sliding, resulting in the deviation of the ring from position of the shaft or the outer casing towards the circumference direction. Improper installation, the inclination, and too large interference will easily cause clearance reduction, increasing friction heat production, surface softening, and the abnormal peeling occurs prematurely. As peeling spreads, the foreign matter is peeled off into the pocket of the cage, resulting in the blockage of cage operation; the generation of additional loads increased the wear of the cage, and such a deteriorating cycle can cause the cage to break. ◐◑ Bearing cage material defect Cracks, metal inclusions, shrinkage cavities, air bubbles and riveting defects, nails, padding, severe riveting, etc. may cause the cage to break. ◐◑ Intrusion of hard foreign objects The intrusion of foreign hard foreign objects or other foreign matter increase the wear of bearing cage. Bearing cage performance varies with cage materials and molding technology, ZYS can supply all types of bearing cage to meet the requirements of different applications. Besides the textile laminated phenolic resin, porous polyamide and PTFE engineering plastic, and other plastic cage materials, we can also supply finished cages according to the drawings provided by customers. For more information, please send email to zysdong@gmail.com or visit our website www.zysbearing.com. View Details
Which type of bearing is less noisy?
                                       The noise of bearing not only affects the bearing operation, but also brings a lot of trouble to the mechanical equipment. The intrusion of foreign materials will directly cause certain noise during the operatio...                                        The noise of bearing not only affects the bearing operation, but also brings a lot of trouble to the mechanical equipment. The intrusion of foreign materials will directly cause certain noise during the operation of the bearing, and the improper lubrication and wrong bearing installation will also cause bearing noise. Which kinds of bearings have less noise? 1.The noise of the ball bearing is lower than that of the roller bearing, and the friction noise of the bearing with less sliding is lower than that of the bearing with relatively more sliding; the bearing with more balls and thick outer ring also has smaller noise. 2. The noise of bearing with solid cage is relatively lower than that of a bearing using a stamped cage. 3. The noise of bearing with the plastic cage is lower than that of the bearings using solid cage or stamped cage. 4. Bearings with high precision, especially those with higher precision rolling elements, have lower noise than low precision bearings. 5. The noise of small bearings is relatively small compared to the noise of large bearings. In order to maintain the good performance of the bearing, daily maintenance, inspection, overhaul, and prevention must be done. For long-running equipment, the usual inspection and tracking is particularly important, including the rotation of the bearing, vibration, temperature, lubricant status, etc. According to the test results, equipment maintenance personnel can find and deal with problems in time. ZYS will carefully analyze the technical information and application of bearing offered by the customer, and then choose the right type of bearing and inform the precautions during installation and operation. If you want to know more information, please send email to zysdong@gmail.com or visit our website: www.zysbearing.com. View Details
Tips of changing the washing machine bearing
                                       After the washing machine bearing is removed, first observe whether there are cracks, rust, scars on the rolling element, the inner ring and outer ring of the bearing. Then hold the inner ring of the bearing by ...                                        After the washing machine bearing is removed, first observe whether there are cracks, rust, scars on the rolling element, the inner ring and outer ring of the bearing. Then hold the inner ring of the bearing by hand and level the bearing, and rotate the outer ring of the bearing with the other hand. If the bearing is good, the outer ring should rotate smoothly and gradually decelerate to stop. There is no vibration or obvious stagnation during the rotation. After the rotation, the outer ring does not reverse. If the bearing is defective, noise and vibration will appear when it rotates. It will be abrupt like a brake when it stops, and it will reverse backwards seriously. Such bearings should be replaced.   The radial clearance of the washing machine bearing is 0.01 mm-0.02 mm. Push the inner ring in all directions. If the gap is felt when pushing, then the bearing wear is severe. Before installing the washing machine bearing, it should be cleaned and checked for flexibility and smoothness, and greased. Then, ZYS washing machine bearing is placed on the journal, and a sleeve is used to hold the inner ring of the bearing. The upper end of the sleeve is iron-plated and hammered until the bearing is in place. When knocking, pay attention to the fact that the bearing can not be skewed, and the tap should be facing the axial direction. View Details
Signs That You Need To Change Washing Machine Bearings
                                       1. Noise After long operation of washing machine, the bearings in the drum are eventually going to wear out. You can tell this immediately when you hear noise appearing from the drum during the operation. You c...                                        1. Noise After long operation of washing machine, the bearings in the drum are eventually going to wear out. You can tell this immediately when you hear noise appearing from the drum during the operation. You can do a quick inspection of the drum. 2. Oil stains on the clothes If there are oil on the clothes after each washing cycle, it means that your main seal on the bearings is also worn and should be replaced. Despite this, you'd better change the bearings as well since they could collapse. It's important to remember to put the right seal around each bearing as well. The wrong seal could end up leaking water on the new bearings, hence causing part failure once again. Products features of Washing Machine Bearings: · Bearing supported, shipped grease lubricated and protected against dust larger than .012" (.3mm) diameter. · Available with additional lip seals (- 2RS) for enhanced sealing, as well as, with a keyway on the inner ring (-P) or the inner and outer ring (-PP) for additional ease of installation. · Operating temperature: 21 to 140°F (-6 to 60°C) · Special grease available for operating temperatures: -40 to 212°F (-40 to 100°C) Contact Person: Mr.Dong Address: No.1 Jilin Road, Luoyang City,Henan Province,China Zip:471039 Tel: +86-379-6488 1209 Fax: +86-379-6488 1529 Mobile No:+86 139 3792 3793 Website: www.zys.com.cn              www.zysbearing.com E-mail: zysdong@gmail.com View Details