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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge>Floating bearing "device application" common problem Frequently Asked Questions about Rolling Bearings
1. When smooth bearings are used, the more grease is applied, the better? /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
For smooth bearings; the more grease is applied, the better; this is a common concept of fault. Excessive grease in the bearing and bearing chambers will form excessive mixing of the grease; then extremely high temperatures occur.
2. How to install and disassemble?
Do not directly hammer the bearing end face and non-stress surface when installing the device; the bearing should be evenly stressed by the clamp, sleeve or other device. If the device is coated with smooth oil, it will make the device smoother. Large; the bearing should be placed in mineral oil and heated to 90~100 °C and immediately installed. When it is difficult to disassemble; it is recommended that you use the unpacking and pulling out to the inner ring to care for the hot oil; The heat will cause the inner ring of the bearing to swell; then it will make it easier to fall.
3. Is the radial clearance of the bearing as small as possible?
No. All bearings require the minimum working clearance; you need to choose the appropriate clearance according to the conditions. GB 4604-93; the radial clearance of the rolling bearing is divided into five groups - 2 groups, 0 groups, 3 groups, 4 groups, 5 groups; the clearance value is from small to large; the 0 group is the standard clearance. The basic radial clearance group is suitable for common working conditions, conventional temperature and common interference cooperation, at high temperature and high speed. Bearings operating under unique conditions such as low noise and low friction should use large radial clearance. For radial spindles and bearings for machine tool spindles, small radial clearance should be used. For roller bearings, a small number of bearings can be adhered to. Work clearance. Others; there is no such thing as a clearance bearing, and finally; the working clearance after the bearing is installed; it is better than the original clearance before the device. The letter 浜 shrimp through the Han wounded 湫瘟 湫瘟.
4. Is it necessary to remove the bearing unit?
The outer surface of the bearing is coated with anti-rust oil; you need to carefully clean it with hygienic gasoline or fire oil; then apply clean high-quality or high-speed high-temperature smooth grease to the device. The effect of hygienic degree on bearing life and oscillation noise is very Big. But we want to uniquely remind you that the fully enclosed bearings do not need to be refueled.
5. How to choose smooth grease?
Smoothing has a very important influence on the operation and life of the bearing. Here is a general guideline for analyzing smooth greases. Smooth greases are made from base oils, thickeners and additives; different varieties and different brands have different trademarks. Smooth grease functions vary greatly; the required rotation limit is different; it is necessary to pay attention to the selection. The function of smooth grease is mainly determined by the base oil. Usually the low viscosity base oil is suitable for low temperature, high speed, high viscosity for high temperature, High load. Thickener is also related to the smooth function; the water resistance of the thickener determines the water resistance of the smooth grease. The standard; the smooth grease of different brands can not be mixed; and; even the smooth grease of the same thickener; It will also have a bad influence on each other due to different additives.
6. Do you have all the requirements for the appearance of the device and the installation site?
If there are foreign objects such as iron filings, burrs, dust, etc. in the bearing, it will cause noise and oscillation during the operation of the bearing; even damage the raceway and the rolling body. Therefore, before the bearing of the device; you need to ensure the appearance of the device and the environment of the device. Health.
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Source: China Bearing Network Time: 2018-04-29