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Imported bearing common problem highlights
Source: China Bearing Network Time: 2018-01-29
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Today, Junda Import Bearing Co., Ltd. sorted out some of the problems often encountered in the use of imported bearings and gave answers; expect to be able to help us.
Q: Is the radial clearance of the imported bearings as small as possible?
A: Not necessarily! Not all imported bearings require the minimum working clearance; you need to choose the appropriate clearance according to the conditions. For example; GB 4604-93; rolling bearing radial clearance is divided into five groups - 2 groups, 0 groups, 3 Group, 4 groups, 5 groups; the clearance value is from small to large; the zero group is the standard clearance. The fundamental radial clearance group is suitable for common working conditions, conventional temperature and common interference cooperation. Bearings operating under unique conditions such as high speed, low noise, low friction, etc. should use large radial clearance. For radial spindles and bearings for machine tool spindles, small radial clearance should be used. Roller bearings can be used. A small amount of 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. It is believed that the radial clearance of imported bearings is not necessarily as small as possible.
Q: How do you look at the problems of imported bearings during operation and deal with them?
A: Please visit the article "Checking the faults and disposal methods of imported bearings in the operation" in the imported bearing area of ​​this station.
Q: What is the bearing steel of the imported bearings? Is it composed of data? How to classify?
Answer: The information of the inner jacket ring and steel ball of the imported bearing is bearing steel (vacuum heat treatment). Most of the imported bearings; the chemical composition of the domestic chrome steel (GCr15). SUJ2 using the SUJ2 in the JIS steel grade. In the world; as a bearing material has been standardized. For example: with AISL52100 (United States), DIN100Cr6 (West Germany), BS535A99 (UK) are the same kind of steel. Use this information; useful to improve the torque function of the bearing , reduce noise; extend the life. But in humid or high temperature environment; need to use martensitic stainless steel data.
Q: Please analyze the effect of the imported bearing bracket and its layout.
A: Please refer to the article “Import and layout characteristics of imported bearing brackets†in the imported bearing area of ​​this station.
Question: Does the imported bearing show the appearance of the rule sound is formed by the cause?
Answer: The appearance of the imported bearing in the form of a ruled sound may be formed by the following two reasons:
1. Foreign matter causes channel corrosion, indentation, and scars.
The solution is to remove the associated parts; use clean and smooth grease
2, the channel is off; fatigue wear.
The solution is: replace the bearing.
Q: I would like to ask about the use of imported bearings; what should be paid attention to?
A: Please refer to the article “Requirements for the application of imported bearings†in the imported bearing area of ​​this station.
Q: Is it necessary to remove the imported bearings before the device?
A: Yes. Because the imported bearings are coated with anti-rust oil; therefore, not only need to be cleaned; but also need to be carefully removed with hygienic gasoline or fire oil; then apply clean high-quality or high-speed high-temperature smooth grease to use. The effect of hygiene on bearing life and oscillation noise is very large.
But we want to uniquely remind you that the fully enclosed bearings do not need to be refueled.
Question: Does the smoothness have an effect on imported bearings?
A: We can see the article "Importance of Imported Bearings for Smoothness" in the Bearing Zone of this Station.
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