The grinding machine is a processing equipment often used in the production and manufacturing industry, which can finish the workpiece, so that the dimensional accuracy of the workpiece and the surface treatment can meet the appropriate standards. In this process summary, the grinding machine spindle bearing selection is particularly important, if the bearing selection is not good will affect the machining accuracy, then the grinding machine spindle bearing should be how to choose?
The author of this article, Maxwell, as a brand bearing technical engineer for more than 15 years, has made an in-depth introduction to the types, applications and choices of grinding machine spindle bearings from a technical point of view to help more grinding machine operators.
Types and applications of spindle bearings for grinding machines
1. angular contact ball bearing
Angular contact ball bearings can bear radial and axial loads at the same time, and can bear complex loads when installed in pairs, which is suitable for occasions with high accuracy and stiffness requirements. Angular contact ball bearings are very suitable for high-speed grinding machine spindle, such as B7000CY type high-precision angular contact ball bearings, contact Angle is 15°, specially designed for high-speed grinding machine spindle, in rotation accuracy, speed, friction and other aspects of performance are very good.
2. two-way thrust angular contact ball bearings
Two-way thrust angular contact ball bearings can also be used in grinding machine main shaft bearings, especially to bear two-way axial loads. In order to obtain better performance, it can be combined with double row cylindrical roller bearings to improve the overall bearing capacity and stiffness.
3. cylindrical roller bearings
Compared with other bearings, cylindrical roller bearings can withstand a larger radial load, in the case of higher speed, such as high-speed rotating machine tool spindle, you can use NN30/W33, NN30K/W33 series bearings, these bearings are small friction coefficient, rotation accuracy and efficiency are very good.
4. ceramic ball bearing
Ceramic ball has good hardness, wear resistance, high temperature resistance, compared with the general bearing, its weight is relatively light, can significantly improve the bearing speed, accuracy, suitable for high speed and high precision grinding machine spindle.
Grinding machine spindle bearing how to choose?
1. look at the temperature control ability
During the operation of the main shaft bearing of the grinder, a certain degree of temperature rise is inevitable, and this temperature rise will affect the bearing speed. It is necessary to select the appropriate bearing type, pairing method and lubrication method according to the application scenario of the grinder, so that the integrity can be improved.
2. pay attention to bearing life, bearing capacity
Grinding machine spindle bearing can maintain accuracy, to a certain extent determines the life of the grinding machine spindle assembly, bearing bearing capacity is very important for heavy grinding machine, if the bearing is not wear-resistant and durable, then equipment maintenance costs will be greatly increased.
3. bearing stiffness
The grinding machine should ensure the rigidity and stability of the spindle, otherwise it will make the bearing accuracy error, and there will be vibration when it is serious, so that the workpiece is easy to have quality problems, affecting the processing pass rate.
4. Noise level
The main source of grinding machine noise is the grinding head bearing emitted by the grinding machine during high-speed operation, so the grinder spindle bearing with low noise should be selected, which is more friendly to personnel and the environment.
Conclusion
Grinder spindle has a variety of bearings to choose from, its choice range is more, the specific type and model of bearings should be selected, in fact, it depends on the overall configuration of the grinder, if you read this guide is still unable to determine which type of bearings to choose, please send a message to VKUKEN, our professional bearing application engineer will contact you, After understanding the specific parameters of the equipment to recommend you the appropriate bearing, and provide you with the bearing specification.
