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Characteristic analysis of bearing ring super-finishing
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1. It can be useful to reduce the waviness. During the ultra-finishing process; when the arc touched by the grindstone and the workpiece is greater than or equal to the wavelength of the waviness of the workpiece surface; it can ensure that the grindstone always acts on the peak without touching the trough; The peak has a higher touch pressure; the peak is cut off; thus reducing the waviness.
2. Improve the groove error of the Ball Bearing raceway. Superfinishing can be useful to improve the groove shape error of the raceway; usually can improve about 35%.
3. It can make the compressive stress of the super-finished surface. In the process of super-finishing, the cold-form deformation occurs first; therefore, the surface of the workpiece constitutes the residual compressive stress after super-finishing.
4. Decrease the appearance roughness value.
5. It can add the touch area of ​​the outer surface of the ferrule operation. After super-finishing; the outer touch support area of ​​the ferrule operation can be 15%~40% after grinding; added to 80%~95%.
6. High production efficiency; low labor intensity; easy to complete automation.
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NSK Bearing
NSK manufacture a full range of deep groove ball bearings. These bearings are the most common type and are used in a wide variety of applications.
Single-Row Deep Groove Ball Bearings
Pressed Steel Cages
Single-row deep groove ball bearings are the most common type of rolling bearings. Their use is very widespread.
In addition to open type bearings, these bearings often have steel shields or rubber seals installed on one or both sides and are prelubricated with grease. Also, snap rings are sometimes used on the periphery. As to cages, pressed steel ones are the most common.
For big deep groove ball bearings, machined brass cages are used.
Machined cages are also used for high speed applications.
Extra Small Ball Bearings and Miniature Ball Bearings
Miniature and instrument ball bearings can be divided into two basic types, deep groove and angular contact. The first (deep groove) can be further divided into the following five classes depending on their design details:
Standard type
Flanged outer ring
Extended inner ring
Expanded type in which one ring has a radial thickness that is larger than normal compared with the bearing width.
Thin section type in which both rings are extra thin in the radial direction. They can also be classified as: open, shielded, or sealed.
Maximum-Type Ball Bearings
Maximum-Type ball Bearings contain a larger number of balls than normal deep groove ball bearings because of filling slots in the inner and outer rings. Because of their filling slots, they are not suitable for applications with high axial loads. types of bearings have boundary dimensions equal to those of single-row deep groove ball bearings of Series 6200 and 6300 respectively. Besides the open type, ZZ type shielded bearings are also available. When using these bearings, it is important for the filling slot in the outer ring to be outside of the loaded zone as much as possible. Their cages are pressed steel.
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Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com