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How To Select INA Bearings

Source:  skf bearing  Time:  2020-09-23

1. Selection of shaft and bearing and tolerance of control room

Press-in bearings INA 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, and the tolerance drops. As the tolerance of the shaft is obviously "sandy" after turning it by hand, it may be too poor or the roundness of the shaft. Therefore, a good shaft and bearing central control room should also be controlled within the roundness tolerance. Tolerance control is only for many domestic manufacturers without roundness control.


2. INA bearing assembly method

Because INA bearings are precision products, such as improperly assembled channels, it is easy to damage INA bearings, and INA bearings can cause damage. When assembling the INA bearing, there should be a special mold, which cannot hit people. The pressure when entering the shaft can only be a small circle. When the circle, it is only cycled by force. The assembly requires pneumatic or hydraulic pressure to be installed on the upper and lower molds in a horizontal state. If the INA bearing channel is inclined, it will cause damage to the power and cause the bearing to cause the INA bearing.


3. Prevention of assembly foreign matter

When installed in the rotor dynamic balance, it is easy to generate iron filings into the INA bearing to dynamically balance the INA bearing, so it is best to balance the INA bearing before loading. There are also some manufacturers in order to facilitate assembly, in the internal coating with some oil or grease lubrication, but the operator bearing assembly is often difficult to control the amount, if the oil or grease in the large indoor INA bearings, INA bearings accumulate along the axis When, it is easy to enter the INA bearing to rotate. Japan is the best room INA bearings, oiled or greased, if the bearings are not coated, there must be no accumulation in the control room.


4. Anti-rust paint

The characteristic of paint rust is that multiple motors sound good in a sealed assembly motor, but after a period of time in the warehouse, the motor becomes very abnormal sound, except for the severe rust of the INA bearing. Many manufacturers will be regarded as the former INA bearing problem. Through our continuous publicity, we have now realized that the main electrical factory is the problem of insulating paint. The main problem is that the insulating varnish volatile acid is formed at a certain temperature, humidity, and corrosive substances, leading to corrosion damage in the INA bearing channel. The only problem now is to choose a good varnish and assemble the air after drying for a while. INA Bearing SL06020-E online, contact us for more details.


INA bearings (especially rolling bearings) are of two types with cage and without cage. Among them, large-scale INA bearings are generally required to withstand larger loads, often without a cage, but filled with rolling elements between the inner and outer raceways. And most of the small and medium INA rolling bearings are with cages.


In the process of INA bearing processing, how are the outer ring, inner ring, rolling element and cage of INA bearing assembled together? Simply put, first put the inner and outer rings of the INA bearing, put the inner ring aside, then put the rolling elements (put aside), then adjust the position of the rolling elements, and finally, put the cage. Now everyone knows that the cage is involved in the processing of INA bearings. So what is the main role of the INA bearing cage?


The role of the cage is:


1. Guide and drive the rolling elements to roll on the correct raceway;


2. The cage separates the rolling elements at equal distances and is evenly distributed on the circumference of the raceway to prevent collision and friction between the rolling elements during work;


3. In separable bearings, the rolling elements and a ferrule are combined to prevent the rolling elements from falling off.


Bearings are called windows, which are used to isolate and guide the rolling elements. The pocket gap allows the cage to have a certain amount of movement in the radial and axial directions, and the total radial movement is called the cage gap. The roller cage has a variety of structural types and complex shapes. There are many equidistant pockets on the cage. The shapes of the pockets are spherical, round, elliptical, rectangular, and toothed. The size is larger than the size of the rolling element. The difference between the two is the pocket gap. Sometimes for NTN bearing cages The connecting part between the windows is called the lintel, which plays the role of connecting and increasing the strength of the cage.