SKF bearing storage method

Learn from SKF authorized dealers how to store SKF bearings

1: The storage location must be protected from moisture because the bearing will rust once it has passed through the tide.

2: SKF carton packaging should be placed on a certain specification shelf to facilitate the search and restocking

3: When transporting large bearings, use tools and forklifts to handle the goods.

4: Try not to suppress some plastic-packed goods. Because after all, it is plastic

5: Do not mix the models because the grease inside the different models is different.

6: Regular maintenance, such as cleaning some anti-rust oil frequently

7: Put some of the outer packaging of the bearing as much as possible with a cloth to prevent the bearing from entering the dust.

8: Some precision spindle bearings must be handled with care.

9: SKF packaging should not be squeezed to prevent the box from being broken when the customer will be disgusted.

10: Follow the instructions during maintenance

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Analysis of bearing troubleshooting methods

It is not uncommon for the bearing to malfunction during operation, so there is no need to make a fuss. A failure has occurred and it is critical to judge and deal with it. Today we will explain the common faults of FAG bearings and how to eliminate them.

1. Bearing temperature is too high

When the mechanism is running, the part where the bearing is installed is allowed to have a certain temperature. When the body of the mechanism is touched by hand, it should be normal to not feel hot, otherwise the bearing temperature is too high.

The reasons for the bearing temperature being too high are: the quality of the lubricating oil does not meet the requirements or deteriorates, the viscosity of the lubricating oil is too high; the assembly of the mechanism is too tight (the gap is insufficient); the bearing assembly is too tight; the bearing race rotates on the shaft or inside the casing; Large; bearing cage or rolling body fragmentation.

2. Bearing noise

Rolling bearings allow a slight running noise during operation. If the sound is too loud or there is abnormal noise or impact, the bearing is faulty.

The causes of noise generated by rolling bearings are more complicated. One is the wear of the inner and outer rings of the bearing. As a result of this wear, the bearing and the housing, the bearing and the shaft are broken, causing the axis to deviate from the correct position and produce an abnormal sound when the shaft is moving at a high speed. When the bearing is fatigued, the surface metal peeling off will also increase the radial clearance of the bearing to produce abnormal noise. In addition, insufficient bearing lubrication, dry friction, and bearing crushing can produce abnormal sounds. After the bearing wears loose, the cage is loose and damaged, and the abnormal bearing damage will also occur.

When the rolling bearing is disassembled and inspected, the bearing failure and the cause of damage can be judged according to the damage of the bearing.

Rolling surface metal peeling

The bearing rolling elements and the inner and outer ring raceways are subjected to periodic pulsating loads, resulting in periodic changes.
Contact stress. When the number of stress cycles reaches a certain value, fatigue peeling occurs on the rolling element or the inner and outer ring raceways. If the bearing load is too large, this fatigue will be exacerbated. In addition, the bearing is not installed correctly, the shaft is bent, and the raceway is peeled off. Fatigue spalling of the bearing races reduces the accuracy of the shaft and causes vibration and noise in the mechanism.

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The best method and conditions for repairing KOYO bearings

KOYO bearings are mass-produced mechanical parts, and the manufacturing precision requirements are very strict. Therefore, for most of the easy-to-buy bearing types, it should be more cost-effective to buy than to repair. Only in the following cases, bearing repair is considered. The problem is:

(1) A large number of bearings of the same type used in large factories are mainly in the form of wear on the rolling surface, fatigue or fretting abrasion, especially the damaged parts are mostly cages or rolling elements, and the ferrules or gaskets are still repaired. value;

(2) Large and extra large bearings, which have no major damage to the parts due to failure or failure, or valuable bearings must be managed to extend their useful life;

(3) Some types of bearings that are really difficult to purchase, have no spare parts after failure and have to be repaired, especially imported bearings;

(4) The bearing has slight damage, such as slight rust generated during the inventory period, and slight fretting abrasion caused by transportation. It is a pity that such repair is easy and abandon.

In addition to economics, the repair of the bearing is also technical, which requires the repairer to fully understand the corresponding technical requirements of the bearing, and the structural, technical and material characteristics of the bearing and its parts, otherwise it is difficult to ensure that the bearing repair has The desired effect.

First, the economic benefits of bearing repair

In general, the number of bearings is small, the number is large, the price of a single bearing is high, or the structure of the bearing is simple. If the size is large, the cost of repair is relatively low, and the economic benefit is higher.

In addition, monitoring the operation of the bearing, and planning to repair the bearing before failure, can get twice the result with half the effort. Following a reasonable process, using efficient repair equipment and tools, and getting help from a professional bearing plant can help increase economic efficiency.

Second, the benefits of cooperation with professional bearing companies

In the business of repairing bearings, if the cooperation of professional bearing companies can be obtained, the following benefits may be obtained:

(1) The technical requirements of each process of repair can be clarified, and how to ensure the overall quality of the repaired bearings,

(2) It is possible to utilize many of the specialized experience of specialized bearing plants, which can reliably, efficiently and economically meet process requirements;

(3) It is possible to order a tool for a professional bearing company, which can be economical and saves a lot of trouble;

(4) Orders such as cages, rolling elements, rivets, etc. can be ordered from professional bearing companies, which may make the repair work simple, convenient and economical.

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INA bearing failure check

INA bearing will change its bearing capacity, rotation precision and wear resistance due to its own quality and external conditions during use. When the performance index of INA bearing is lower than the use requirements and cannot work normally, INA bearing will occur. If the fault occurs or even fails, the INA bearing will stop after the failure, and the machine and equipment will stop and there will be various abnormal phenomena such as loss of function. Therefore, it is necessary to find out the cause in a short period of time and take corresponding measures.

In order to ensure that INA bearings can maintain their proper performance under long-term conditions and must be used for a long time. INA bearings must be inspected and maintained. Inspection and maintenance are very important to prevent malfunctions. In operation, it is important to check the rolling sound of INA bearings. , vibration, temperature and lubricant.

2. Vibration of INA bearings

The vibration of INA bearing has obvious influence on the failure of INA bearing. For example: peeling, indentation, corrosion, crack, wear, etc. will be reflected in the vibration test of INA bearing, so the special INA bearing vibration measuring device (frequency analyzer) is adopted. And the vibrometer, etc.) can measure the magnitude of the vibration, and the specific situation of the abnormal vibration can be inferred by the frequency distribution. The measured value differs depending on the use conditions of the INA bearing or the mounting position of the sensor, and therefore needs to be in advance for each machine. The measured values ​​are analyzed and compared to determine the criterion.

3. INA bearing temperature

Usually, the temperature of the INA bearing rises slowly with the start of operation, and reaches a steady state after 1 to 2 hours. The normal temperature of the INA bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If lubrication or installation is not suitable, then The temperature of the INA bearing will rise sharply and abnormal temperature will occur. At this time, it is necessary to stop the machine and take necessary precautions.

4. Lubricant

Lubrication has an important influence on the fatigue life and friction, wear, temperature rise, vibration, etc. of the rolling INA bearing. Without normal lubrication, the INA bearing can not work. Analysis of the damage of the INA bearing indicates that about 40% of the INA bearing damage is associated with Lubrication is related. Therefore, the good lubrication of INA bearings is an effective measure to reduce the friction and wear of INA bearings. In addition, the lubrication of INA bearings also plays a role in heat dissipation, rust prevention, sealing, and mitigation. Can not expire, the selection should be correct. The lubrication of the INA bearing of the harvester is divided into oil lubrication and grease lubrication. For large gearbox oil lubrication, GL-5 80W90 gear oil is used. Grease lubrication is generally lubricated with lithium molybdenum disulfide. Grease, lubricator, stepless speed change lower unit must be lubricated with Mobil XHP222 or better grease.

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