How to choose the rolling clearance of sunthai bearings?

Clearance is an important factor in the normal operation of sunthai bearings. Choosing the appropriate sunthai bearing clearance can make the load distribution between the rolling elements reasonable; can limit the axial and radial displacement of the shaft (or casing) to ensure the rotation accuracy of the shaft; make the sunthai bearing can be normal at the required temperature. Work; can reduce the vibration and noise of sunthai bearing work, it can be seen that sunthai bearing clearance has a great influence on sunt bearing life, temperature rise, vibration and noise. In the selection of sunthai bearing clearance, in addition to the working conditions of the sunthai bearing (such as load, speed, temperature, etc.) and the performance requirements of sunthai bearings (such as friction torque, vibration and noise, rotation accuracy, etc.) Should consider:
  1. The interference fit between the sunthai bearing and the shaft and housing results in a reduction in play;
  2. When the sunthai bearing is working, the temperature difference between the inner and outer rings causes the clearance to decrease;
3. The material of the shaft and the outer casing is reduced or increased due to the difference in expansion coefficient.
Experience has shown that the optimum working clearance for a ball sunthai bearing is approximately zero; a small amount of working clearance should be maintained for the optimum working condition of the roller sunthai bearing. In components that require good support rigidity (such as machine tool spindles), there may be a certain amount of preload.

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Maintenance bearing small note

Some of the outer packagings in the warehouse are not standardized or have no outer packaging, ranging from a few yuan to a set of three or four thousand yuan. These bearings are exposed on the shelves, and the temperature of the warehouse is high. The butter originally applied to the bearings for lubrication and maintenance has been dried, which accelerates the rust of the bearings and will affect the use of our products. In response to this situation, the supply organization organizes the cleaning and maintenance of these bearings.
Maintenance is divided into the following steps:
1. First put the bearing into the gasoline to clean, wipe off the sludge and dust left on the bearing. All the rusted bearings are gently wiped with metallographic sandpaper until there is no rough feeling by hand.
2. Dry the cleaned bearing with a dry rag and place it in anti-rust oil. In this process, the bearing should be completely in contact with the anti-rust oil, and the bearing should not be rotated, so that the oil film formed by the anti-rust oil can cover the surface of the bearing to achieve the purpose of anti-rust.
3, the next use of lithium grease, butter should be evenly applied to the surface of the bearing, including the inner and outer rings, wheels, cage. And it is to rotate the bearing while wiping, so that the butter really enters the inside of the bearing and fully lubricates.
4. The last process is packaging. In order to save costs, we “turn waste into treasure”, cut the cement packaging bags that have been scrapped in the warehouse into suitable packaging bags, wrap the bearings tightly, wrap them, label the bearing specifications and put them back on the shelves for storage.

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