Precautions when using NSK bearings

Source: China Bearing Network Time: 2018-01-25

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1. Selection and control of shaft and NSK bearing chambers: NSK bearings should be converted to sensitive and unobstructed after being pressed into NSK bearings. If there is significant change, it is not sensitive; then the scale of the shaft is too large; If the NSK bearing is pressed into the shaft and the hand is transformed with a significant "sand" feeling; it may be that the shaft is too large or the roundness of the shaft is not good. Therefore, when handling the shaft and the NSK bearing chamber, Control the roundness; many domestic manufacturers only control the public service; there is no control on the roundness.
2, NSK bearing device method: because NSK bearing is a high-precision product; if the device is not appropriate, it is very simple to damage the NSK bearing channel; causing NSK bearing damage. NSK bearing should have a special mold in the device; can not be hit casually When pressing the shaft, only a small circle is forced; when the large circle is pressed, only a large circle of force is applied. When the device is installed, the air pressure or hydraulic pressure is required; when pressing, the upper and lower touches are outside the horizontal condition; if there is a skew, the NSK will be incurred. The bearing channel is damaged by the force; the NSK bearing is caused to sound.
3. Avoidance of foreign objects in the device: When the NSK bearing is mounted on the rotor, it is very simple to insert the iron filings that occur during dynamic balancing into the NSK bearing; therefore, it is best to balance the NSK bearing before it is installed. Some manufacturers want to install Convenience; some oil or grease is applied to the NSK bearing chamber for smoothing; however, it is often difficult for the operator to manipulate the amount; if oil or grease accumulates in the NSK bearing chamber; it is very simple along the NSK bearing transition. The shaft enters the inside of the NSK bearing. The best thing in the NSK bearing chamber is not to apply oil or grease; if it is not coated, it must be handled in the NSK bearing chamber.
4, the prevention of paint rust: paint rust is characterized by multiple seals in the motor; the sound of the motor is very good when the device is installed; but after some time in the warehouse; the abnormal noise of the motor is very large; remove the NSK bearing There are severe rusting appearances. Many manufacturers have considered it to be a problem of NSK bearings; through our constant publicity; now the motor factory has realized that it is the primary problem of insulating varnish. The problem is mainly due to the evaporation of acidic substances from the insulating varnish. Corresponding temperature and humidity constitute a corrosive substance; the NSK bearing channel corrosion caused NSK bearing damage. The problem can only be to choose a good insulating varnish; and after the drying, the device is ventilated for a while.
The lifespan of NSK bearings is closely related to the production, installation and operation; it must be done at every stage; in order to make NSK bearings in the best working condition; then extend the service life of NSK bearings. . First use the Allen key to loosen the locking screw on the bearing's painful sleeve; then use a small iron rod to puncture the counterbore on the top cover of the top cover; and loosen the partial pain sleeve against the direction of rotation of the shaft.
2. Loosen the bolts that secure the bearing housing. Remove the bearing from the shaft together with the bearing housing. Note the shaft housing at the end of the shaft. The bearing block bolt at the other end of the shaft should be loosened; the two bearings should be prevented from being damaged by each other.
Second, the device 1. Before the bearing is installed on the shaft; the fixing pin of the bearing casing must be unplugged; the outer surface of the journal is polished and cleaned together; and the oil is rust-proof and smooth at the journal (allowing the bearing to slightly change on the shaft).
2. Apply smooth oil to the bearing seat and bearing joint; install the bearing into the bearing housing. Then place the assembled bearing on the shaft together with the NSK bearing housing. Push to the desired position to carry out the device.
3. The bolts of the fixed bearing housing should not be tightened first; the bearing housing should be able to change in the bearing housing. The same bearing and seat on the same shaft are installed; the shaft is converted into several turns; the bearing itself is actively positioned to correct the position. Fasten the bearing block bolts.
4. Install a partial pain set. First set the partial pain on the painful step of the inner sleeve of the bearing; and tighten the direction of rotation with the hand. Then prick the small iron rod into or against the counterbore on the painful sleeve. 1. Use the hammer to strike the small iron rod in the direction of rotation of the shaft. Make the painful device firm; finally lock the hexagonal screw on the painful sleeve.

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